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Research paper thumbnail of Photocatalytic Degradation of Alizarin Red S by Using a Layered Zn/Al-NO3 Double Hydroxides

Arid-zone Journal of Basic & Applied Research

This research presents the use of layered Zn-Al-NO3 layered double hydroxides (LDH) which photoca... more This research presents the use of layered Zn-Al-NO3 layered double hydroxides (LDH) which photocatalytically degraded Alizarin Red S (ARS) under a UV source. The prepared photocatalytic material was characterized by employing the use of X-Ray Diffraction (XRD) analysis, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), Fourier Transform Infrared (FTIR) spectroscopy and Band gap Energy using Tauc plot. The analyzed XRD patterns of Zn-Al-NO3 show characterized diffraction angles typical of LDH. Also, the XRD patterns were used to calculate the apparent crystallite size (32.5 nm). The bandgap energy of the LDH was determined to be 3.2 eV. The effect of the initial concentration of the ARS dye, catalyst amount or dose and pH were also determined. The Zn-Al-NO3 efficiently degraded ARS at (69.91%), which could be attributed to its smaller crystallite size. The kinetic study (reaction rate and half-life) of the photodegradation appeared to be R 2 = 0.9886 and (t1/2) = 76....

Research paper thumbnail of Synthesis, Characterization and Photocatalytic Activity of Eco-friendly ZnCr/C-LDH Nanocatalyst

Arid Zone Journal of Basic and Applied Research

ZnCr/C layered double hydroxide (LDH) was synthesized using the co-precipitation method. The LDH ... more ZnCr/C layered double hydroxide (LDH) was synthesized using the co-precipitation method. The LDH photo-Catalyst was characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive Spectroscopy (EDS), Fourier transformed infrared (FTIR) and Thermo gravimetric analysis (TGA). The 2ϴ values at 13.5, 24.5 and 32.5 in XRD confirmed the formation of the Layered double hydroxide structure. The lower band gap energy at 1.84eV suggests that the catalyst works well in the UV-visible region. The photocatalytic activity of the LDH under UV-Irradiation in aqueous Congo red (CR) was studied under optimal operational parametric conditions (Concentration, catalytic dosage and pH). The kinetics of the photocatalytic activity was investigated using the Langmuir Hinshelwood model. The LDH Shows excellent recyclability, durability and stability even after the fourth cycle.

Research paper thumbnail of Photocatalytic Degradation of Methylene Blue and Phenol Using TiO2/Activated-Carbon Composite Catalysts

Asian Journal of Chemistry, 2015

Research paper thumbnail of Density functional theory and molecular dynamic simulation studies on the corrosion inhibition of some thiosemicarbazide derivatives on aluminum metal

Aluminum (Al), one of the most comercially used metals is also susceptible to corrosion like iron... more Aluminum (Al), one of the most comercially used metals is also susceptible to corrosion like iron and zinc when subjected to corrosive environments, either in the industries or during applications in general. One major method of controlling corrosion of Al is through the use of inhibitors which are usually compounds containing heteroatoms, conjugated systems or which are relatively large in size. One of such inhibitors, thiosemicarbazide derivatives were reported in literature as an Al inhibitor in 2M HCl solution through experimental studies. In this study, computational methods were used to further provide an indepth explanation into the mode and mechanism of the thiosemicarbazides inhibition on Al surface. Parameters including quantum chemical through DFT and molecular dynamic simulations of studied molecules on Al surfaces were conducted. Results obtained through calculation of adsorption or binding energies of these thiosemicarbazides were in good agreement with the experimenta...

Research paper thumbnail of ZnCr/C Layered double hydroxide: Synthesis, Characterization and photocatalytic application on Methylene blue removal

Journal of Physical Chemistry and Functional Materials

Research paper thumbnail of Effects of Operating Parameters on Photocatalytic Degradation of Methylene Blue or Phenol on Supported Titanium-Based Catalysts

Asian Journal of Chemistry, 2015

ABSTRACT

Research paper thumbnail of Photocatalytic Degradation of Methylene Blue and Phenol Using TiO2/Activated-Carbon Composite Catalysts

Asian Journal of Chemistry, 2015

Research paper thumbnail of Photocatalytic Degradation of Alizarin Red S by Using a Layered Zn/Al-NO3 Double Hydroxides

Arid-zone Journal of Basic & Applied Research

This research presents the use of layered Zn-Al-NO3 layered double hydroxides (LDH) which photoca... more This research presents the use of layered Zn-Al-NO3 layered double hydroxides (LDH) which photocatalytically degraded Alizarin Red S (ARS) under a UV source. The prepared photocatalytic material was characterized by employing the use of X-Ray Diffraction (XRD) analysis, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), Fourier Transform Infrared (FTIR) spectroscopy and Band gap Energy using Tauc plot. The analyzed XRD patterns of Zn-Al-NO3 show characterized diffraction angles typical of LDH. Also, the XRD patterns were used to calculate the apparent crystallite size (32.5 nm). The bandgap energy of the LDH was determined to be 3.2 eV. The effect of the initial concentration of the ARS dye, catalyst amount or dose and pH were also determined. The Zn-Al-NO3 efficiently degraded ARS at (69.91%), which could be attributed to its smaller crystallite size. The kinetic study (reaction rate and half-life) of the photodegradation appeared to be R 2 = 0.9886 and (t1/2) = 76....

Research paper thumbnail of Synthesis, Characterization and Photocatalytic Activity of Eco-friendly ZnCr/C-LDH Nanocatalyst

Arid Zone Journal of Basic and Applied Research

ZnCr/C layered double hydroxide (LDH) was synthesized using the co-precipitation method. The LDH ... more ZnCr/C layered double hydroxide (LDH) was synthesized using the co-precipitation method. The LDH photo-Catalyst was characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive Spectroscopy (EDS), Fourier transformed infrared (FTIR) and Thermo gravimetric analysis (TGA). The 2ϴ values at 13.5, 24.5 and 32.5 in XRD confirmed the formation of the Layered double hydroxide structure. The lower band gap energy at 1.84eV suggests that the catalyst works well in the UV-visible region. The photocatalytic activity of the LDH under UV-Irradiation in aqueous Congo red (CR) was studied under optimal operational parametric conditions (Concentration, catalytic dosage and pH). The kinetics of the photocatalytic activity was investigated using the Langmuir Hinshelwood model. The LDH Shows excellent recyclability, durability and stability even after the fourth cycle.

Research paper thumbnail of Photocatalytic Degradation of Methylene Blue and Phenol Using TiO2/Activated-Carbon Composite Catalysts

Asian Journal of Chemistry, 2015

Research paper thumbnail of Density functional theory and molecular dynamic simulation studies on the corrosion inhibition of some thiosemicarbazide derivatives on aluminum metal

Aluminum (Al), one of the most comercially used metals is also susceptible to corrosion like iron... more Aluminum (Al), one of the most comercially used metals is also susceptible to corrosion like iron and zinc when subjected to corrosive environments, either in the industries or during applications in general. One major method of controlling corrosion of Al is through the use of inhibitors which are usually compounds containing heteroatoms, conjugated systems or which are relatively large in size. One of such inhibitors, thiosemicarbazide derivatives were reported in literature as an Al inhibitor in 2M HCl solution through experimental studies. In this study, computational methods were used to further provide an indepth explanation into the mode and mechanism of the thiosemicarbazides inhibition on Al surface. Parameters including quantum chemical through DFT and molecular dynamic simulations of studied molecules on Al surfaces were conducted. Results obtained through calculation of adsorption or binding energies of these thiosemicarbazides were in good agreement with the experimenta...

Research paper thumbnail of ZnCr/C Layered double hydroxide: Synthesis, Characterization and photocatalytic application on Methylene blue removal

Journal of Physical Chemistry and Functional Materials

Research paper thumbnail of Effects of Operating Parameters on Photocatalytic Degradation of Methylene Blue or Phenol on Supported Titanium-Based Catalysts

Asian Journal of Chemistry, 2015

ABSTRACT

Research paper thumbnail of Photocatalytic Degradation of Methylene Blue and Phenol Using TiO2/Activated-Carbon Composite Catalysts

Asian Journal of Chemistry, 2015

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