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Papers by rosari saleh

The Influence of Montmorillonite Incorporation in Mn-Doped ZnO Nanoparticles for Photocatalytic Degradation of Organic Dyes

Advanced Materials Research, Jul 1, 2015

The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and mon... more The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and montmorillonite modified Mn-doped ZnO nanoparticles towards aqueous solution of organic dyes (methylene blue and malachite green) under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, electron spin resonance, and diffuse reflectance spectroscopy. Comparison of degradation efficiency demonstrated that montmorillonite modified Mn-doped ZnO nanoparticles exhibited higher activity than bare Mn-doped ZnO nanoparticles.

Montmorillonite Incorporated in Cr Doped ZnO Nanoparticles for Degradation of Organic Dyes in Water under UV Light Irradiation

Advanced Materials Research, Aug 1, 2015

In this study, the photocatalytic degradation of methylene blue and congo red has been investigat... more In this study, the photocatalytic degradation of methylene blue and congo red has been investigated using montmorillonite modified Cr-doped ZnO nanoparticles. Chromium doped zinc oxide nanoparticles were synthesized by co-precipitation method and were characterized using X-ray diffraction, Fourier-transform infrared absorption and UV-visible spectrophotometer. Furthermore these nanoparticles were explored to degradation of methylene blue and congo red in aqueous solution as model of organic pollutant under UV light irradiation. Comparison of degradation efficiency demonstrated that Cr-doped ZnO nanoparticles modified montmorillonite exhibited higher activity than pure Cr-doped ZnO.

Comparative Study on Photocatalytic Performance of (La,Fe) and (Ce,Fe)-Codoped ZnO Nanoparticles

Materials Science Forum, Aug 1, 2015

The present study evaluates the photocatalytic degradation of congo red as a model of organic pol... more The present study evaluates the photocatalytic degradation of congo red as a model of organic pollutant over LaFe- and CeFe-codoped ZnO nanoparticles under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy. The photodegradation efficiency of congo red using two 20W UV lamp was higher for LaFe-codoped ZnO nanoparticles compared with CeFe-codoped ZnO nanoparticles. Photocatalytic mechanism was investigated by measuring the photocatalytic degradation rate in the presence of ammonium oxalate, natrium sulfate, tert-butyl alcohol as photogenerated holes, photogenerated electrons and hydroxyl radical species scavenger. The results revealed that electrons are the main species in the photocatalytic process.

Non-Radiative Recombination in a-Si:H

MRS Proceedings, 1994

ABSTRACTFrequency-resolved photoluminescence spectroscopy (FRS) is used to study non-radiative re... more ABSTRACTFrequency-resolved photoluminescence spectroscopy (FRS) is used to study non-radiative recombination in a-Si:H using generation rates sufficiently small to garantee geminate recombination at low temperature. The quenching of the photoluminescence by a higher defect density ND and an increase of temperature influences the QFRS spectra differently: Whereas for increasing ND the quenching of the signal is more pronounced on the low frequency side raising temperature leads to a uniform decrease in the entire frequency range. The dependence of the lifetime distribution on ND is quantitatively explained in a model where radiative recombination competes with non-radiative tunneling into defect states.

Journal of physics, 2020

Use of carbon-based materials, such as graphene, has drawn attention in the wastewater treatment ... more Use of carbon-based materials, such as graphene, has drawn attention in the wastewater treatment field because of their high specific surface area. This property of graphene suggested that it had superior adsorption characteristics for removing contaminant dyes from aqueous solutions. Based on this precept, we wanted to enhance the adsorption ability of the Ag/Fe3O4/ZrO2 photocatalyst by adding graphene, using the co-precipitation method for synthesis. The crystal structure of as-prepared specimen was characterized using Xray diffraction, which confirmed the existence of tetragonal phase ZrO2, cubic spinel phase Fe3O4 and cubic phase Ag. Unfortunately, the graphene characteristic peak could not be detected by X-ray diffraction (XRD). Thermal gravimetric analysis showed that mass degradation below 150 °C could be attributed to the loss of bound water from the surface of the ZrO2. Mass degradation at 340 °C could be attributed to the combustion process of graphene, which indicated the presence of graphene in the prepared samples. The synthesized samples were utilized for the uptake of methylene blue (MB) as a model of an organic pollutant. The results that were obtained showed that the inclusion of graphene increased the ability of Fe3O4/ZrO2 adsorption. Increases in the weight percentage of graphene increased the adsorption ability of the samples. The best adsorption occurred in alkaline pH conditions. The experimental data could be fitted better using the Langmuir model than it could using the Freundlich model. Finally, as-prepared samples showed good stability, even after four cycles of reuse.

Nucleation and Atmospheric Aerosols, 2018

The LaMnO3/graphene composites have been successfully synthesized using co-precipitation method a... more The LaMnO3/graphene composites have been successfully synthesized using co-precipitation method at five different calcination temperature of LaMnO3 nanoparticles (untreated, 500°C, 600℃, 700°C, and 800°C.The effects of calcination temperature on the formation of LaMnO3 nanoparticles on LaMnO3/graphene were investigated. The average grain size of LaMnO3/graphene increases with increasing calcination temperature on LaMnO3 nanoparticles. The use of calcination can effectively reduce the crystallization of LaMnO3 nanoparticles on LaMnO3/graphene composites. LaMnO3/graphene shows the orthorhombic structure of LaMnO3 nanoparticles while the peak of graphene cannot be identified owing to graphene's broad peak. The LaMnO3 nanoparticles obtained at a calcination temperature of 800 °C exhibits superior adsorption to remove methylene blue. Furthermore, the adsorption test of methylene blue using LaMnO3/graphene follows a pseudo-second order kinetic process and Langmuir model.

Nucleation and Atmospheric Aerosols, 2018

In this study, the adsorption capability of Fe3O4/ZrO2 composites, synthesized using co-precipita... more In this study, the adsorption capability of Fe3O4/ZrO2 composites, synthesized using co-precipitation method, has been studied with the addition of nanographene platelets (NGP) and graphene. The as-prepared samples were fairly characterized using X-ray diffraction, energy dispersive x-ray spectroscopy, and a vibrating sample magnetometer. The asprepared samples were used for uptake of methylene blue (MB) used as a model of an organic pollutant. The obtained results show that the incorporation of NGP and graphene increases the adsorption capability of Fe3O4/ZrO2, and the addition of graphene enhanced the adsorption ability of Fe3O4/ZrO2 to a higher degree compared to NGP, in the removal of MB from the aqueous solution. We also studied the effect of pH, adsorption isotherms, and reusability of the as-prepared samples on the MB removal.

Improving Photocatalytic Performance in Degradation of Methylene Blue using Magnetite Fe-doped ZnO/Montmorillonite Nanocomposite

IOP conference series, May 1, 2017

Adsorption of organic cationic dye into Fe-doped ZnO nanoparticle coupled with montmorillonite adsorbent

Nucleation and Atmospheric Aerosols, 2018

Materials Sciences and Applications, 2013

Ce-doped ZnO nanoparticles with various doping concentrations of cerium ion were prepared by the ... more Ce-doped ZnO nanoparticles with various doping concentrations of cerium ion were prepared by the co-precipitation method. All prepared nanoparticles were characterized by electron spin resonance (ESR), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectroscopy. All nanoparticles show X-ray diffraction pattern that matched with ZnO in its wurzite structure and average grain size was in the range of 13-16 nm. UV-Vis measurements indicated a red shift of the photophysical response of ZnO after doping that was exhibited in reflection spectra in the visible region between 300-800 nm. In addition, it has been found from electron spin resonance measurements that defects, which are likely to be oxygen vacancy and an electron trapped at cerium site are formed in our Ce-doped ZnO particles. Photocatalytic activities of Ce-doped ZnO were evaluated by irradiating the nanoparticles solution to ultraviolet light by taking methyl orange as organic dye. The experiment demonstrated that the photodegradation increased as doping concentrations increased at first and then decreased when the doping concentration exceeded 9 at%. It is proposed that the photocatalytic activity is strongly dependent on the formation of oxygen vacancy and an electron trapped at cerium site.

Influence of carbon-based material incorporation on Ag/Fe3O4/ZrO2 composite as highly efficient catalyst for photo- and sonodegradation of organic pollutant

Journal of physics, 2021

In this work, a novel quaternary composite, Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2/graphene, as high... more In this work, a novel quaternary composite, Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2/graphene, as highly efficient catalysts were prepared through ultrasonic-assisted and co-precipitation methods. The prepared composite was characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The photo- and sonocatalytic activity of prepared composite were studied through the degradation of methylene blue (MB) as a model of organic pollutant under UV light and ultrasonic irradiation, separately. The experimental results showed that the composite contained a combination of the desired nanoparticles. In the catalytic activity, Ag/Fe3O4/ZrO2/graphene exhibited much higher efficiency than Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2 composite. Furthermore, the influence catalyst dosage was studied. To understand the role of reactive species in the sonocatalytic activity, several scavengers were tested. The reusability study suggested that the prepared composite remain stable even after four cycles reused.

Journal of Biophysical Chemistry, 2011

In this present study, we predicted the neutralizing epitope of a modeled H5N1 hemagglutinin 1046... more In this present study, we predicted the neutralizing epitope of a modeled H5N1 hemagglutinin 1046T when interacted with a modeled monoclonal antibody variable fragment 8H5Fv using molecular dynamics simulation. Following the production run of the molecular dynamics simulation, we observed the average change of solvent accessible surface of the antigen alongside the formation of hydrogen bonds between the two structures during the simulation. Based on the acquired data, we predicted the neutralizing epitope of the 1046T antigen to be consisted of residues Asp 84,

Nucleation and Atmospheric Aerosols, 2017

ZnO/CeO2 photocatalysts were loaded on to nanographene platelets (NGP) layer sheets to form ZnO/C... more ZnO/CeO2 photocatalysts were loaded on to nanographene platelets (NGP) layer sheets to form ZnO/CeO2/NGP composites. The synthesized process was achieved by using two-step methods: Sol-gel followed by the hydrothermal method, the concentration of NGP was varied by 5, 10, and 15 wt.%. The as-prepared ZnO/CeO2/NGP samples were characterized by X-ray diffraction (XRD) and Brunner Emett-Teller (BET). The XRD spectra of all samples exhibit a good agreement with hexagonal wurtzite ZnO and face centered cubic phase of CeO2, additionally a new peak could be indexed for graphitic-like structures from NGP. The BET result shows that the incorporation of NGP could enhance the specific surface area of ZnO/CeO2 composites. Furthermore, it is found that addition of NGP in ZnO/CeO2 composites could enhance photocatalytic activities in methylene blue (MB) dye degradation compared to ZnO/CeO2 composites. Our results show that addition of 10 wt.% NGP to ZnO/CeO2 composites exhibits the highest photocatalytic activity. The enhancement of photocatalytic activities can be ascribed to the function of NGP as trap state for the electron. The scavenger tests results indicated that the photo-generated hole would play an important role in the degradation of MB.

Journal of physics, Apr 1, 2016

To cite this article: Abdel-Ghany F. Shoair (2007) Synthesis, characterization and catalytic prop... more To cite this article: Abdel-Ghany F. Shoair (2007) Synthesis, characterization and catalytic properties of ruthenium(III) complexes containing 4-hydroxy-3-(p-X-phenylazo)-benzopyrane-2one,

Synthesis and characterization of BiFeO3/LaFeO3/graphene composites as persulfate activator for removal of 4-nitrophenol

Advanced Powder Technology

Effect of Crystallite Structure and Graphene Incorporation on Photocatalytic Performance of LaFeO3

IOP Conference Series: Materials Science and Engineering, 2017

Improving Photocatalytic Performance in Degradation of Methylene Blue using Magnetite Fe-doped ZnO/Montmorillonite Nanocomposite

IOP Conference Series: Materials Science and Engineering, 2017

IOP Conference Series: Materials Science and Engineering, 2017

In this work LaMnO3-NGP composites with various NGP wt. % were prepared using co-precipitation me... more In this work LaMnO3-NGP composites with various NGP wt. % were prepared using co-precipitation method. The prepared LaMnO3-NGP composites were characterized by X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, and Fourier Transform Infrared (FT-IR) spectroscopy. The prepared samples were then used to remove methylene blue (MB) as a model of an organic pollutant under visible light and ultrasonic irradiation separately and simultaneously. The obtained results revealed that the catalytic performance of LaMnO3-NGP composites show better performance than LaMnO3 nanoparticles. The photosonocatalytic activity also shows the highest degradation efficiency. Furthermore, the main influence factors on the catalytic activity were studied and discussed.

IOP Conference Series: Materials Science and Engineering, 2017

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licenc... more Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

IOP Conference Series: Materials Science and Engineering, 2017

View the article online for updates and enhancements. You may also like Preparation at large-scal... more View the article online for updates and enhancements. You may also like Preparation at large-scale of polypropylene nanocomposites with microwaves reduced graphene oxide M G Iniestra-Galindo, J Pérez-González, B M Marín-Santibáñez et al.

The Influence of Montmorillonite Incorporation in Mn-Doped ZnO Nanoparticles for Photocatalytic Degradation of Organic Dyes

Advanced Materials Research, Jul 1, 2015

The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and mon... more The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and montmorillonite modified Mn-doped ZnO nanoparticles towards aqueous solution of organic dyes (methylene blue and malachite green) under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, electron spin resonance, and diffuse reflectance spectroscopy. Comparison of degradation efficiency demonstrated that montmorillonite modified Mn-doped ZnO nanoparticles exhibited higher activity than bare Mn-doped ZnO nanoparticles.

Montmorillonite Incorporated in Cr Doped ZnO Nanoparticles for Degradation of Organic Dyes in Water under UV Light Irradiation

Advanced Materials Research, Aug 1, 2015

In this study, the photocatalytic degradation of methylene blue and congo red has been investigat... more In this study, the photocatalytic degradation of methylene blue and congo red has been investigated using montmorillonite modified Cr-doped ZnO nanoparticles. Chromium doped zinc oxide nanoparticles were synthesized by co-precipitation method and were characterized using X-ray diffraction, Fourier-transform infrared absorption and UV-visible spectrophotometer. Furthermore these nanoparticles were explored to degradation of methylene blue and congo red in aqueous solution as model of organic pollutant under UV light irradiation. Comparison of degradation efficiency demonstrated that Cr-doped ZnO nanoparticles modified montmorillonite exhibited higher activity than pure Cr-doped ZnO.

Comparative Study on Photocatalytic Performance of (La,Fe) and (Ce,Fe)-Codoped ZnO Nanoparticles

Materials Science Forum, Aug 1, 2015

The present study evaluates the photocatalytic degradation of congo red as a model of organic pol... more The present study evaluates the photocatalytic degradation of congo red as a model of organic pollutant over LaFe- and CeFe-codoped ZnO nanoparticles under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy. The photodegradation efficiency of congo red using two 20W UV lamp was higher for LaFe-codoped ZnO nanoparticles compared with CeFe-codoped ZnO nanoparticles. Photocatalytic mechanism was investigated by measuring the photocatalytic degradation rate in the presence of ammonium oxalate, natrium sulfate, tert-butyl alcohol as photogenerated holes, photogenerated electrons and hydroxyl radical species scavenger. The results revealed that electrons are the main species in the photocatalytic process.

Non-Radiative Recombination in a-Si:H

MRS Proceedings, 1994

ABSTRACTFrequency-resolved photoluminescence spectroscopy (FRS) is used to study non-radiative re... more ABSTRACTFrequency-resolved photoluminescence spectroscopy (FRS) is used to study non-radiative recombination in a-Si:H using generation rates sufficiently small to garantee geminate recombination at low temperature. The quenching of the photoluminescence by a higher defect density ND and an increase of temperature influences the QFRS spectra differently: Whereas for increasing ND the quenching of the signal is more pronounced on the low frequency side raising temperature leads to a uniform decrease in the entire frequency range. The dependence of the lifetime distribution on ND is quantitatively explained in a model where radiative recombination competes with non-radiative tunneling into defect states.

Journal of physics, 2020

Use of carbon-based materials, such as graphene, has drawn attention in the wastewater treatment ... more Use of carbon-based materials, such as graphene, has drawn attention in the wastewater treatment field because of their high specific surface area. This property of graphene suggested that it had superior adsorption characteristics for removing contaminant dyes from aqueous solutions. Based on this precept, we wanted to enhance the adsorption ability of the Ag/Fe3O4/ZrO2 photocatalyst by adding graphene, using the co-precipitation method for synthesis. The crystal structure of as-prepared specimen was characterized using Xray diffraction, which confirmed the existence of tetragonal phase ZrO2, cubic spinel phase Fe3O4 and cubic phase Ag. Unfortunately, the graphene characteristic peak could not be detected by X-ray diffraction (XRD). Thermal gravimetric analysis showed that mass degradation below 150 °C could be attributed to the loss of bound water from the surface of the ZrO2. Mass degradation at 340 °C could be attributed to the combustion process of graphene, which indicated the presence of graphene in the prepared samples. The synthesized samples were utilized for the uptake of methylene blue (MB) as a model of an organic pollutant. The results that were obtained showed that the inclusion of graphene increased the ability of Fe3O4/ZrO2 adsorption. Increases in the weight percentage of graphene increased the adsorption ability of the samples. The best adsorption occurred in alkaline pH conditions. The experimental data could be fitted better using the Langmuir model than it could using the Freundlich model. Finally, as-prepared samples showed good stability, even after four cycles of reuse.

Nucleation and Atmospheric Aerosols, 2018

The LaMnO3/graphene composites have been successfully synthesized using co-precipitation method a... more The LaMnO3/graphene composites have been successfully synthesized using co-precipitation method at five different calcination temperature of LaMnO3 nanoparticles (untreated, 500°C, 600℃, 700°C, and 800°C.The effects of calcination temperature on the formation of LaMnO3 nanoparticles on LaMnO3/graphene were investigated. The average grain size of LaMnO3/graphene increases with increasing calcination temperature on LaMnO3 nanoparticles. The use of calcination can effectively reduce the crystallization of LaMnO3 nanoparticles on LaMnO3/graphene composites. LaMnO3/graphene shows the orthorhombic structure of LaMnO3 nanoparticles while the peak of graphene cannot be identified owing to graphene's broad peak. The LaMnO3 nanoparticles obtained at a calcination temperature of 800 °C exhibits superior adsorption to remove methylene blue. Furthermore, the adsorption test of methylene blue using LaMnO3/graphene follows a pseudo-second order kinetic process and Langmuir model.

Nucleation and Atmospheric Aerosols, 2018

In this study, the adsorption capability of Fe3O4/ZrO2 composites, synthesized using co-precipita... more In this study, the adsorption capability of Fe3O4/ZrO2 composites, synthesized using co-precipitation method, has been studied with the addition of nanographene platelets (NGP) and graphene. The as-prepared samples were fairly characterized using X-ray diffraction, energy dispersive x-ray spectroscopy, and a vibrating sample magnetometer. The asprepared samples were used for uptake of methylene blue (MB) used as a model of an organic pollutant. The obtained results show that the incorporation of NGP and graphene increases the adsorption capability of Fe3O4/ZrO2, and the addition of graphene enhanced the adsorption ability of Fe3O4/ZrO2 to a higher degree compared to NGP, in the removal of MB from the aqueous solution. We also studied the effect of pH, adsorption isotherms, and reusability of the as-prepared samples on the MB removal.

Improving Photocatalytic Performance in Degradation of Methylene Blue using Magnetite Fe-doped ZnO/Montmorillonite Nanocomposite

IOP conference series, May 1, 2017

Adsorption of organic cationic dye into Fe-doped ZnO nanoparticle coupled with montmorillonite adsorbent

Nucleation and Atmospheric Aerosols, 2018

Materials Sciences and Applications, 2013

Ce-doped ZnO nanoparticles with various doping concentrations of cerium ion were prepared by the ... more Ce-doped ZnO nanoparticles with various doping concentrations of cerium ion were prepared by the co-precipitation method. All prepared nanoparticles were characterized by electron spin resonance (ESR), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectroscopy. All nanoparticles show X-ray diffraction pattern that matched with ZnO in its wurzite structure and average grain size was in the range of 13-16 nm. UV-Vis measurements indicated a red shift of the photophysical response of ZnO after doping that was exhibited in reflection spectra in the visible region between 300-800 nm. In addition, it has been found from electron spin resonance measurements that defects, which are likely to be oxygen vacancy and an electron trapped at cerium site are formed in our Ce-doped ZnO particles. Photocatalytic activities of Ce-doped ZnO were evaluated by irradiating the nanoparticles solution to ultraviolet light by taking methyl orange as organic dye. The experiment demonstrated that the photodegradation increased as doping concentrations increased at first and then decreased when the doping concentration exceeded 9 at%. It is proposed that the photocatalytic activity is strongly dependent on the formation of oxygen vacancy and an electron trapped at cerium site.

Influence of carbon-based material incorporation on Ag/Fe3O4/ZrO2 composite as highly efficient catalyst for photo- and sonodegradation of organic pollutant

Journal of physics, 2021

In this work, a novel quaternary composite, Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2/graphene, as high... more In this work, a novel quaternary composite, Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2/graphene, as highly efficient catalysts were prepared through ultrasonic-assisted and co-precipitation methods. The prepared composite was characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The photo- and sonocatalytic activity of prepared composite were studied through the degradation of methylene blue (MB) as a model of organic pollutant under UV light and ultrasonic irradiation, separately. The experimental results showed that the composite contained a combination of the desired nanoparticles. In the catalytic activity, Ag/Fe3O4/ZrO2/graphene exhibited much higher efficiency than Ag/Fe3O4/ZrO2/NGP and Ag/Fe3O4/ZrO2 composite. Furthermore, the influence catalyst dosage was studied. To understand the role of reactive species in the sonocatalytic activity, several scavengers were tested. The reusability study suggested that the prepared composite remain stable even after four cycles reused.

Journal of Biophysical Chemistry, 2011

In this present study, we predicted the neutralizing epitope of a modeled H5N1 hemagglutinin 1046... more In this present study, we predicted the neutralizing epitope of a modeled H5N1 hemagglutinin 1046T when interacted with a modeled monoclonal antibody variable fragment 8H5Fv using molecular dynamics simulation. Following the production run of the molecular dynamics simulation, we observed the average change of solvent accessible surface of the antigen alongside the formation of hydrogen bonds between the two structures during the simulation. Based on the acquired data, we predicted the neutralizing epitope of the 1046T antigen to be consisted of residues Asp 84,

Nucleation and Atmospheric Aerosols, 2017

ZnO/CeO2 photocatalysts were loaded on to nanographene platelets (NGP) layer sheets to form ZnO/C... more ZnO/CeO2 photocatalysts were loaded on to nanographene platelets (NGP) layer sheets to form ZnO/CeO2/NGP composites. The synthesized process was achieved by using two-step methods: Sol-gel followed by the hydrothermal method, the concentration of NGP was varied by 5, 10, and 15 wt.%. The as-prepared ZnO/CeO2/NGP samples were characterized by X-ray diffraction (XRD) and Brunner Emett-Teller (BET). The XRD spectra of all samples exhibit a good agreement with hexagonal wurtzite ZnO and face centered cubic phase of CeO2, additionally a new peak could be indexed for graphitic-like structures from NGP. The BET result shows that the incorporation of NGP could enhance the specific surface area of ZnO/CeO2 composites. Furthermore, it is found that addition of NGP in ZnO/CeO2 composites could enhance photocatalytic activities in methylene blue (MB) dye degradation compared to ZnO/CeO2 composites. Our results show that addition of 10 wt.% NGP to ZnO/CeO2 composites exhibits the highest photocatalytic activity. The enhancement of photocatalytic activities can be ascribed to the function of NGP as trap state for the electron. The scavenger tests results indicated that the photo-generated hole would play an important role in the degradation of MB.

Journal of physics, Apr 1, 2016

To cite this article: Abdel-Ghany F. Shoair (2007) Synthesis, characterization and catalytic prop... more To cite this article: Abdel-Ghany F. Shoair (2007) Synthesis, characterization and catalytic properties of ruthenium(III) complexes containing 4-hydroxy-3-(p-X-phenylazo)-benzopyrane-2one,

Synthesis and characterization of BiFeO3/LaFeO3/graphene composites as persulfate activator for removal of 4-nitrophenol

Advanced Powder Technology

Effect of Crystallite Structure and Graphene Incorporation on Photocatalytic Performance of LaFeO3

IOP Conference Series: Materials Science and Engineering, 2017

Improving Photocatalytic Performance in Degradation of Methylene Blue using Magnetite Fe-doped ZnO/Montmorillonite Nanocomposite

IOP Conference Series: Materials Science and Engineering, 2017

IOP Conference Series: Materials Science and Engineering, 2017

In this work LaMnO3-NGP composites with various NGP wt. % were prepared using co-precipitation me... more In this work LaMnO3-NGP composites with various NGP wt. % were prepared using co-precipitation method. The prepared LaMnO3-NGP composites were characterized by X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, and Fourier Transform Infrared (FT-IR) spectroscopy. The prepared samples were then used to remove methylene blue (MB) as a model of an organic pollutant under visible light and ultrasonic irradiation separately and simultaneously. The obtained results revealed that the catalytic performance of LaMnO3-NGP composites show better performance than LaMnO3 nanoparticles. The photosonocatalytic activity also shows the highest degradation efficiency. Furthermore, the main influence factors on the catalytic activity were studied and discussed.

IOP Conference Series: Materials Science and Engineering, 2017

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licenc... more Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

IOP Conference Series: Materials Science and Engineering, 2017

View the article online for updates and enhancements. You may also like Preparation at large-scal... more View the article online for updates and enhancements. You may also like Preparation at large-scale of polypropylene nanocomposites with microwaves reduced graphene oxide M G Iniestra-Galindo, J Pérez-González, B M Marín-Santibáñez et al.