Pham Van Viet FX18141 - Academia.edu (original) (raw)

Papers by Pham Van Viet FX18141

Journal of Science: Advanced Materials and Devices, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Journal of Environmental Chemical Engineering, 2021

Abstract Having junctions of noble metals and semiconductors is an appealing approach to fabricat... more Abstract Having junctions of noble metals and semiconductors is an appealing approach to fabricate a robust photocatalyst for the complete degradation of organic pollutants with visible light activation. Herein, we synthesize Ag/ZnO nanorods (NRs) by a two-step chemical route. ZnO NRs are first grown via a solvothermal process with a length and a diameter of about 300 ± 10 nm and 60 ± 3 nm, respectively. Anisotropic silver nanoparticles (Ag NPs) are then deposited on the surface of the ZnO NRs by a self-assembly process. Thereby, the spatial separation of electron-hole (e–−h+) pairs in the Ag/ZnO NR composites is considerably enhanced because of the localized surface plasmon resonance (LSPR) effect derived from Ag NPs and the suitable energy band alignment between ZnO and Ag. By taking this advantage, Ag/ZnO NRs outperform bare ZnO NRs in photocatalytic activity against rhodamine B (RhB). The Ag/ZnO NRs retain their excellent performance of 86% even after being used repetitively for three recycling rounds. The free radicals trapping test suggests that photogenerated electron is the key factor in the photocatalytic RhB degradation of Ag/ZnO NRs.

Materials Letters, 2020

In this study, we modified g-C 3 N 4 bulk by the a-Bi 2 O 3 microrods (MRs) via simple green rout... more In this study, we modified g-C 3 N 4 bulk by the a-Bi 2 O 3 microrods (MRs) via simple green routes. The as-synthesized Bi 2 O 3 /g-C 3 N 4 composite is indicated a high photoactivity in visible light region. In addition, the NO photocatalytic removal efficiency of Bi 2 O 3 /g-C 3 N 4 composite is significantly improved compared to pure g-C 3 N 4 materials. Herein, a 39.1% NO with a 500 ppb concentration is removed by Bi 2 O 3 /g-C 3 N 4 composite, which is approximately 1.6 times higher than both pure a-Bi 2 O 3 and g-C 3 N 4 after 30 min under visible light. The NO 2 conversion yield is just 6.8% that is approximately 1.7 times smaller than that of pure g-C 3 N 4. Moreover, the stability of the Bi 2 O 3 /g-C 3 N 4 composite is still high after 5 cycles.

Catalysis Communications, 2020

, et al., Green synthesis of Ag@SnO2 nanocomposites for enhancing photocatalysis of nitrogen mono... more , et al., Green synthesis of Ag@SnO2 nanocomposites for enhancing photocatalysis of nitrogen monoxide removal under solar light irradiation, Catalysis Communications (2019),

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2018

In this study, a nanocomposite of silver loaded on TiO 2 nanotubes (Ag/TNTs) was synthesized by a... more In this study, a nanocomposite of silver loaded on TiO 2 nanotubes (Ag/TNTs) was synthesized by a gamma irradiation method with a 92.42% yield. The optimized scale for Ag/TNT synthesis was 1.29 g of precursors per 100 mL solvent. The morphology and crystal structure of the Ag/TNTs were determined by transmission electron microscopy and X-ray diffraction, respectively. The Ag weight percentage in Ag/TNTs was analyzed by inductively coupled plasma atomic emission spectrometry. The results showed that the size of silver nanoparticles on the TNTs decreased when the precursor weight decreased. The Ag/TNT nanocomposite removed 95.45% of methylene blue under simulated sunlight irradiation and could be reused five times with an almost unchanged activity. The formation mechanism of silver nanoparticles on TNTs is also discussed.

Advances in Natural Sciences: Nanoscience and Nanotechnology, 2019

Journal of the Australian Ceramic Society, 2019

In this study, black TiO 2 nanotube arrays (TNAs) were synthesized by hydrothermal process which ... more In this study, black TiO 2 nanotube arrays (TNAs) were synthesized by hydrothermal process which indicate the presence of substantial Ti 3+ and oxygen vacancies (OVs). The formation of Ti 3+ and OVs contributed to the reduced bandgap of TNAs and improved the efficiency of methylene blue (MB) photocatalytic degradation and hydrogen evolution reaction (HER). In this study, the black TNAs synthesized by the anodization method. The current density for hydrogen evolution reaction (HER) of the black TNAs was over − 2 mA/cm 2 at just − 1.4 V vs. Ag/AgCl and the photocurrent density of the black TNAs is about 25% higher than that of the pristine TNAs. In addition, MB photocatalytic degradation of the black TNAs reached nearly 60% after 150 min under visible light. This study inspired the next studies in the use of materials to both treat polluted water and generate renewable energy.

Environmental Chemistry Letters, 2018

Tin oxide nanoparticles (SnO 2 NPs) with a diameter less than 10 nm are usually used in waste wat... more Tin oxide nanoparticles (SnO 2 NPs) with a diameter less than 10 nm are usually used in waste water treatment via the photocatalytic reaction. However, SnO 2 nanoparticles were not clearly studied for this NO photodegradation. In this study, SnO 2 NPs were hydrothermally prepared and measured via characterization techniques such as high-resolution transmission electron microscope (HR-TEM) and high-resolution X-ray photoelectron spectroscopy (HR-XPS). This is the first report of using SnO 2 NPs for NO photodegradation. The results show that the NO photodegradation result showed that SnO 2 NPs degraded 63.37% NO (higher than approximately 2 times compared with P25 catalyst) after 30 min under solar light and the NO 2 yield is only 1.66%. Moreover, SnO 2 nanoparticles are very stable indicating NO gas photodegradation efficiency about 58.96% after five photocatalytic cycles. In addition, reactive radicals in the photocatalysis processes were identified via the trapping experiment and electron spin resonance (ESR) study. Based on the aforementioned experimental results, a detailed photocatalytic mechanism was systematically investigated. The high photocatalytic performance and the stability of SnO 2 NPs under solar light will open to a promising application.

Superlattices and Microstructures, 2018

In this study, we classified the effect of the annealing temperature on silverloaded TiO 2 nanotu... more In this study, we classified the effect of the annealing temperature on silverloaded TiO 2 nanotubes (Ag/TNTs). X-ray diffraction results demonstrate that TNTs have a tendency of phase transformation owing to silver nanoparticles (Ag NPs). The Brunauer-Emmett-Teller method indicates that Ag/TNTs is a mesopore material and the surface area of Ag/TNTs decreases when the annealing temperature increases. This research concluded that the TNT structure begins to break at high annealing temperatures (>400 °C) and is completely broken at 500 °C. The average diameter of the Ag NPs in Ag/TNTs increases linearly with the annealing temperature. In addition, this study clearly explained the oxidation state transformation of Ag in Ag/TNTs under the impact of the annealing temperature, therein, the Ag 0 state is transferred completely to Ag + at 400 °C, and some Ag + is oxidized to form Ag 2+. The Ag/TNTs and Ag/TNTs annealed at 300 °C provided the good methylene blue photodegradation ability for 150 minutes under sunlight condition.

Journal of photochemistry and photobiology. B, Biology, 2018

Silver nanoparticles (Ag NPs) were synthesized by an improved green synthesis method via a photo-... more Silver nanoparticles (Ag NPs) were synthesized by an improved green synthesis method via a photo-reduction process using low-power UV light in the presence of poly (vinyl pyrrolidone) (PVP) as the surface stabilizer. The effective synthesis process was achieved by optimized synthesis parameters such as CHOH: HO ratio, AgNO: PVP ratio, pH value, and reducing time. The formation of Ag NPs was identified by Ultraviolet-visible (UV-vis) absorption spectra, X-ray diffraction pattern (XRD) and Fourier transform infrared spectroscopy (FTIR) spectra. Ag NPs were crystallized according to (111), (200), and (220) planes of the face-centered cubic. The transmission electron microscopy (TEM) image showed that the morphology of Ag NPs was uniform spherical with the average particle size of 16 ± 2 nm. The results of XRD pattern, TEM image, and dynamic light scattering (DLS) analysis proved that Ag crystals with uniform size were formed after the reduction process. The mechanism of the formation o...

Ecotoxicology and environmental safety, Jan 18, 2017

A hydrophilic Y zeolite was primarily treated with sodium hydroxide to enhance its cation exchang... more A hydrophilic Y zeolite was primarily treated with sodium hydroxide to enhance its cation exchange capacity (Na-zeolite). The organo-zeolite (Na-H-zeolite) was prepared by a modification process of the external surface of Na-zeolite with a cationic surfactant (hexadecyltrimethylammonium; HDTMA). Three adsorbents (i.e., pristine zeolite, Na-zeolite, and Na-H-zeolite) were characterized with nitrogen adsorption/desorption isotherms, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, cation exchange capacities, and zeta potential. Results demonstrated that HDTMA can be adsorbed on the surface of Na-zeolite to form patchy bilayers. The adsorption capacity of several hazardous pollutants (i.e., Pb(2+), Cu(2+), Ni(2+), Cr2O7(2-), propylbenzene, ethylbenzene, toluene, benzene, and phenol) onto Na-H-zeolite was investigated in a single system and multiple-components. Adsorption isotherm was measured to further understand the effects of the modification process o...

Journal of Experimental Nanoscience, 2017

Thi (2017) The fabrication of the antibacterial paste based on TiO 2 nanotubes and Ag nanoparticl... more Thi (2017) The fabrication of the antibacterial paste based on TiO 2 nanotubes and Ag nanoparticles-loaded TiO 2 nanotubes powders,

Journal of Nanomaterials, 2016

Tin oxide nanoparticles (SnO2NPs) were prepared at low temperature by hydrothermal method. Synthe... more Tin oxide nanoparticles (SnO2NPs) were prepared at low temperature by hydrothermal method. Synthesized SnO2NPs were confirmedviacharacterization techniques such as UV-visible spectroscopy (UV-vis), X-ray diffraction (XRD), and Transmission Electron Microscope (TEM). The synthesized nanoparticles were in the size of 3 nm and they have high photocatalytic activity. The result showed that SnO2NPs degraded 88.88% MB solution after 30 minutes of UV illumination and reached 90.0% for 120 minutes (2 hours) of UV illumination. Moreover, they degraded 79.26% MB solution after 90 minutes (1.5 hours) under assisted sunlight illumination.

Journal of Nanomaterials, 2016

We report on the process of synthesizing copper nanoparticles (Cu Nps) for a short reactive time ... more We report on the process of synthesizing copper nanoparticles (Cu Nps) for a short reactive time by chemical reduction method with a support of CTAB reductive agent. Their properties were determined by ultraviolet-visible (UV-Vis) absorption spectrum, the X-ray (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), and Transmission Electron Microscopy (TEM) images. The antifungal activity of Cu Nps was evaluated by testing againstFusariumsp. The Cu Nps were obtained with the average size in the range of 20–50 nm having spherical shape. The survey shows that when Cu Nps were used at 450 ppm concentration in 9-day incubation, 93.98% of fungal growth was inhibited.

Advanced Science, Engineering and Medicine, 2014

ABSTRACT In this present research, the novel TiO2 nanorods are synthesized by the facile hydrothe... more ABSTRACT In this present research, the novel TiO2 nanorods are synthesized by the facile hydrothermal method. The characteristics of crystal structure, size, shape and morphology of TiO2 nanorods were studied by X-ray diffraction (XRD) pattern, and Field Emission Scanning Electron Microscopy (FESEM) images. The results of the as-prepared TiO2 nanorods have shown that the volume fraction of TiCl3:NaOH did not influence the formation of the various TiO2 nanorods. The diameter of TiO2 nanorods were synthesized at 160 oC for 20 hours varies from 200 to 300 nm, while the various lengths of the TiO2 nanorods were found in the range of about 1.5 μm. The XRD spectrum also showed that the as-prepared rods have been developed in the (101) plane of rutile phase. In addition, the controlled synthesis of TiO2 nanorods on anatase TiO2 seed layers was done at 200 oC for 1 hour. The nanorods became highly aligned with the average length of the rods from 200 to 300 nm. Finally, we found that photocatalytic activity of the as-prepared TiO2 nanorods was significantly better than that of the as-prepared TiO2 thin film. In addition, the decomposition of standard methylene blue (MB) solution was used to be 99.7% for the photocatalytic activity of TiO2 nanorods.

Journal of Science: Advanced Materials and Devices, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Journal of Environmental Chemical Engineering, 2021

Abstract Having junctions of noble metals and semiconductors is an appealing approach to fabricat... more Abstract Having junctions of noble metals and semiconductors is an appealing approach to fabricate a robust photocatalyst for the complete degradation of organic pollutants with visible light activation. Herein, we synthesize Ag/ZnO nanorods (NRs) by a two-step chemical route. ZnO NRs are first grown via a solvothermal process with a length and a diameter of about 300 ± 10 nm and 60 ± 3 nm, respectively. Anisotropic silver nanoparticles (Ag NPs) are then deposited on the surface of the ZnO NRs by a self-assembly process. Thereby, the spatial separation of electron-hole (e–−h+) pairs in the Ag/ZnO NR composites is considerably enhanced because of the localized surface plasmon resonance (LSPR) effect derived from Ag NPs and the suitable energy band alignment between ZnO and Ag. By taking this advantage, Ag/ZnO NRs outperform bare ZnO NRs in photocatalytic activity against rhodamine B (RhB). The Ag/ZnO NRs retain their excellent performance of 86% even after being used repetitively for three recycling rounds. The free radicals trapping test suggests that photogenerated electron is the key factor in the photocatalytic RhB degradation of Ag/ZnO NRs.

Materials Letters, 2020

In this study, we modified g-C 3 N 4 bulk by the a-Bi 2 O 3 microrods (MRs) via simple green rout... more In this study, we modified g-C 3 N 4 bulk by the a-Bi 2 O 3 microrods (MRs) via simple green routes. The as-synthesized Bi 2 O 3 /g-C 3 N 4 composite is indicated a high photoactivity in visible light region. In addition, the NO photocatalytic removal efficiency of Bi 2 O 3 /g-C 3 N 4 composite is significantly improved compared to pure g-C 3 N 4 materials. Herein, a 39.1% NO with a 500 ppb concentration is removed by Bi 2 O 3 /g-C 3 N 4 composite, which is approximately 1.6 times higher than both pure a-Bi 2 O 3 and g-C 3 N 4 after 30 min under visible light. The NO 2 conversion yield is just 6.8% that is approximately 1.7 times smaller than that of pure g-C 3 N 4. Moreover, the stability of the Bi 2 O 3 /g-C 3 N 4 composite is still high after 5 cycles.

Catalysis Communications, 2020

, et al., Green synthesis of Ag@SnO2 nanocomposites for enhancing photocatalysis of nitrogen mono... more , et al., Green synthesis of Ag@SnO2 nanocomposites for enhancing photocatalysis of nitrogen monoxide removal under solar light irradiation, Catalysis Communications (2019),

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2018

In this study, a nanocomposite of silver loaded on TiO 2 nanotubes (Ag/TNTs) was synthesized by a... more In this study, a nanocomposite of silver loaded on TiO 2 nanotubes (Ag/TNTs) was synthesized by a gamma irradiation method with a 92.42% yield. The optimized scale for Ag/TNT synthesis was 1.29 g of precursors per 100 mL solvent. The morphology and crystal structure of the Ag/TNTs were determined by transmission electron microscopy and X-ray diffraction, respectively. The Ag weight percentage in Ag/TNTs was analyzed by inductively coupled plasma atomic emission spectrometry. The results showed that the size of silver nanoparticles on the TNTs decreased when the precursor weight decreased. The Ag/TNT nanocomposite removed 95.45% of methylene blue under simulated sunlight irradiation and could be reused five times with an almost unchanged activity. The formation mechanism of silver nanoparticles on TNTs is also discussed.

Advances in Natural Sciences: Nanoscience and Nanotechnology, 2019

Journal of the Australian Ceramic Society, 2019

In this study, black TiO 2 nanotube arrays (TNAs) were synthesized by hydrothermal process which ... more In this study, black TiO 2 nanotube arrays (TNAs) were synthesized by hydrothermal process which indicate the presence of substantial Ti 3+ and oxygen vacancies (OVs). The formation of Ti 3+ and OVs contributed to the reduced bandgap of TNAs and improved the efficiency of methylene blue (MB) photocatalytic degradation and hydrogen evolution reaction (HER). In this study, the black TNAs synthesized by the anodization method. The current density for hydrogen evolution reaction (HER) of the black TNAs was over − 2 mA/cm 2 at just − 1.4 V vs. Ag/AgCl and the photocurrent density of the black TNAs is about 25% higher than that of the pristine TNAs. In addition, MB photocatalytic degradation of the black TNAs reached nearly 60% after 150 min under visible light. This study inspired the next studies in the use of materials to both treat polluted water and generate renewable energy.

Environmental Chemistry Letters, 2018

Tin oxide nanoparticles (SnO 2 NPs) with a diameter less than 10 nm are usually used in waste wat... more Tin oxide nanoparticles (SnO 2 NPs) with a diameter less than 10 nm are usually used in waste water treatment via the photocatalytic reaction. However, SnO 2 nanoparticles were not clearly studied for this NO photodegradation. In this study, SnO 2 NPs were hydrothermally prepared and measured via characterization techniques such as high-resolution transmission electron microscope (HR-TEM) and high-resolution X-ray photoelectron spectroscopy (HR-XPS). This is the first report of using SnO 2 NPs for NO photodegradation. The results show that the NO photodegradation result showed that SnO 2 NPs degraded 63.37% NO (higher than approximately 2 times compared with P25 catalyst) after 30 min under solar light and the NO 2 yield is only 1.66%. Moreover, SnO 2 nanoparticles are very stable indicating NO gas photodegradation efficiency about 58.96% after five photocatalytic cycles. In addition, reactive radicals in the photocatalysis processes were identified via the trapping experiment and electron spin resonance (ESR) study. Based on the aforementioned experimental results, a detailed photocatalytic mechanism was systematically investigated. The high photocatalytic performance and the stability of SnO 2 NPs under solar light will open to a promising application.

Superlattices and Microstructures, 2018

In this study, we classified the effect of the annealing temperature on silverloaded TiO 2 nanotu... more In this study, we classified the effect of the annealing temperature on silverloaded TiO 2 nanotubes (Ag/TNTs). X-ray diffraction results demonstrate that TNTs have a tendency of phase transformation owing to silver nanoparticles (Ag NPs). The Brunauer-Emmett-Teller method indicates that Ag/TNTs is a mesopore material and the surface area of Ag/TNTs decreases when the annealing temperature increases. This research concluded that the TNT structure begins to break at high annealing temperatures (>400 °C) and is completely broken at 500 °C. The average diameter of the Ag NPs in Ag/TNTs increases linearly with the annealing temperature. In addition, this study clearly explained the oxidation state transformation of Ag in Ag/TNTs under the impact of the annealing temperature, therein, the Ag 0 state is transferred completely to Ag + at 400 °C, and some Ag + is oxidized to form Ag 2+. The Ag/TNTs and Ag/TNTs annealed at 300 °C provided the good methylene blue photodegradation ability for 150 minutes under sunlight condition.

Journal of photochemistry and photobiology. B, Biology, 2018

Silver nanoparticles (Ag NPs) were synthesized by an improved green synthesis method via a photo-... more Silver nanoparticles (Ag NPs) were synthesized by an improved green synthesis method via a photo-reduction process using low-power UV light in the presence of poly (vinyl pyrrolidone) (PVP) as the surface stabilizer. The effective synthesis process was achieved by optimized synthesis parameters such as CHOH: HO ratio, AgNO: PVP ratio, pH value, and reducing time. The formation of Ag NPs was identified by Ultraviolet-visible (UV-vis) absorption spectra, X-ray diffraction pattern (XRD) and Fourier transform infrared spectroscopy (FTIR) spectra. Ag NPs were crystallized according to (111), (200), and (220) planes of the face-centered cubic. The transmission electron microscopy (TEM) image showed that the morphology of Ag NPs was uniform spherical with the average particle size of 16 ± 2 nm. The results of XRD pattern, TEM image, and dynamic light scattering (DLS) analysis proved that Ag crystals with uniform size were formed after the reduction process. The mechanism of the formation o...

Ecotoxicology and environmental safety, Jan 18, 2017

A hydrophilic Y zeolite was primarily treated with sodium hydroxide to enhance its cation exchang... more A hydrophilic Y zeolite was primarily treated with sodium hydroxide to enhance its cation exchange capacity (Na-zeolite). The organo-zeolite (Na-H-zeolite) was prepared by a modification process of the external surface of Na-zeolite with a cationic surfactant (hexadecyltrimethylammonium; HDTMA). Three adsorbents (i.e., pristine zeolite, Na-zeolite, and Na-H-zeolite) were characterized with nitrogen adsorption/desorption isotherms, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, cation exchange capacities, and zeta potential. Results demonstrated that HDTMA can be adsorbed on the surface of Na-zeolite to form patchy bilayers. The adsorption capacity of several hazardous pollutants (i.e., Pb(2+), Cu(2+), Ni(2+), Cr2O7(2-), propylbenzene, ethylbenzene, toluene, benzene, and phenol) onto Na-H-zeolite was investigated in a single system and multiple-components. Adsorption isotherm was measured to further understand the effects of the modification process o...

Journal of Experimental Nanoscience, 2017

Thi (2017) The fabrication of the antibacterial paste based on TiO 2 nanotubes and Ag nanoparticl... more Thi (2017) The fabrication of the antibacterial paste based on TiO 2 nanotubes and Ag nanoparticles-loaded TiO 2 nanotubes powders,

Journal of Nanomaterials, 2016

Tin oxide nanoparticles (SnO2NPs) were prepared at low temperature by hydrothermal method. Synthe... more Tin oxide nanoparticles (SnO2NPs) were prepared at low temperature by hydrothermal method. Synthesized SnO2NPs were confirmedviacharacterization techniques such as UV-visible spectroscopy (UV-vis), X-ray diffraction (XRD), and Transmission Electron Microscope (TEM). The synthesized nanoparticles were in the size of 3 nm and they have high photocatalytic activity. The result showed that SnO2NPs degraded 88.88% MB solution after 30 minutes of UV illumination and reached 90.0% for 120 minutes (2 hours) of UV illumination. Moreover, they degraded 79.26% MB solution after 90 minutes (1.5 hours) under assisted sunlight illumination.

Journal of Nanomaterials, 2016

We report on the process of synthesizing copper nanoparticles (Cu Nps) for a short reactive time ... more We report on the process of synthesizing copper nanoparticles (Cu Nps) for a short reactive time by chemical reduction method with a support of CTAB reductive agent. Their properties were determined by ultraviolet-visible (UV-Vis) absorption spectrum, the X-ray (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), and Transmission Electron Microscopy (TEM) images. The antifungal activity of Cu Nps was evaluated by testing againstFusariumsp. The Cu Nps were obtained with the average size in the range of 20–50 nm having spherical shape. The survey shows that when Cu Nps were used at 450 ppm concentration in 9-day incubation, 93.98% of fungal growth was inhibited.

Advanced Science, Engineering and Medicine, 2014

ABSTRACT In this present research, the novel TiO2 nanorods are synthesized by the facile hydrothe... more ABSTRACT In this present research, the novel TiO2 nanorods are synthesized by the facile hydrothermal method. The characteristics of crystal structure, size, shape and morphology of TiO2 nanorods were studied by X-ray diffraction (XRD) pattern, and Field Emission Scanning Electron Microscopy (FESEM) images. The results of the as-prepared TiO2 nanorods have shown that the volume fraction of TiCl3:NaOH did not influence the formation of the various TiO2 nanorods. The diameter of TiO2 nanorods were synthesized at 160 oC for 20 hours varies from 200 to 300 nm, while the various lengths of the TiO2 nanorods were found in the range of about 1.5 μm. The XRD spectrum also showed that the as-prepared rods have been developed in the (101) plane of rutile phase. In addition, the controlled synthesis of TiO2 nanorods on anatase TiO2 seed layers was done at 200 oC for 1 hour. The nanorods became highly aligned with the average length of the rods from 200 to 300 nm. Finally, we found that photocatalytic activity of the as-prepared TiO2 nanorods was significantly better than that of the as-prepared TiO2 thin film. In addition, the decomposition of standard methylene blue (MB) solution was used to be 99.7% for the photocatalytic activity of TiO2 nanorods.