Synthesis and photocatalytic activity of doped tantalates

Sodium tantalate (NaTaO3) is studied intensively for its high photocatalytic activity. However, NaTaO3 photocatalysts work under ultraviolet (UV) light. Since visible light accounts for more than 40% of solar energy, visible-light-driven photocatalysts have attracted more attention in recent years....

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Main Author: Muhammad Irwan Ratman.
Other Authors: Chen Zhong
Format: Final Year Project
Language:English
Published: 2011
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Online Access:http://hdl.handle.net/10356/44673
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-446732023-03-04T15:36:17Z Synthesis and photocatalytic activity of doped tantalates Muhammad Irwan Ratman. Chen Zhong School of Materials Science and Engineering DRNTU::Engineering::Materials::Material testing and characterization Sodium tantalate (NaTaO3) is studied intensively for its high photocatalytic activity. However, NaTaO3 photocatalysts work under ultraviolet (UV) light. Since visible light accounts for more than 40% of solar energy, visible-light-driven photocatalysts have attracted more attention in recent years. Doping has been proven to be a feasible method to prepare visible-light-driven photocatalysts. Recently, anion doping of nitrogen, sulphur and carbon has been extensively investigated. The aim of this study is to investigate the effect of sodium sulphide (Na2S) on sodium tantalate nanoparticles via hydrothermal technique. The effect of sulphur diffusion in sodium tantalate at high temperatures was also studied. The synthesis of sodium tantalates maintained in sulphur-rich conditions was carried out via both hydrothermal technique and solid-state synthesis. The resulting products was characterised by Scanning Electron Machine (SEM), Energy-dispersive X-ray Spectroscopy (EDX) and X-ray Diffractometer (XRD) and evaluated by UV-vis Diffuse Reflectance Spectroscopy (DRS). The photocatalytic hydrogen evolution was evaluated by gas chromatography. Sulphur-doping of NaTaO3 photocatalyst resulted in changes in the morphology and crystallite size of NaTaO3. It was also found that S-doped NaTaO3 have the ability to produce hydrogen gas in the presence of methanol under UV-light irradiation. Bachelor of Engineering (Materials Engineering) 2011-06-03T01:47:03Z 2011-06-03T01:47:03Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/44673 en Nanyang Technological University 45 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Material testing and characterization
spellingShingle DRNTU::Engineering::Materials::Material testing and characterization
Muhammad Irwan Ratman.
Synthesis and photocatalytic activity of doped tantalates
description Sodium tantalate (NaTaO3) is studied intensively for its high photocatalytic activity. However, NaTaO3 photocatalysts work under ultraviolet (UV) light. Since visible light accounts for more than 40% of solar energy, visible-light-driven photocatalysts have attracted more attention in recent years. Doping has been proven to be a feasible method to prepare visible-light-driven photocatalysts. Recently, anion doping of nitrogen, sulphur and carbon has been extensively investigated. The aim of this study is to investigate the effect of sodium sulphide (Na2S) on sodium tantalate nanoparticles via hydrothermal technique. The effect of sulphur diffusion in sodium tantalate at high temperatures was also studied. The synthesis of sodium tantalates maintained in sulphur-rich conditions was carried out via both hydrothermal technique and solid-state synthesis. The resulting products was characterised by Scanning Electron Machine (SEM), Energy-dispersive X-ray Spectroscopy (EDX) and X-ray Diffractometer (XRD) and evaluated by UV-vis Diffuse Reflectance Spectroscopy (DRS). The photocatalytic hydrogen evolution was evaluated by gas chromatography. Sulphur-doping of NaTaO3 photocatalyst resulted in changes in the morphology and crystallite size of NaTaO3. It was also found that S-doped NaTaO3 have the ability to produce hydrogen gas in the presence of methanol under UV-light irradiation.
author2 Chen Zhong
author_facet Chen Zhong
Muhammad Irwan Ratman.
format Final Year Project
author Muhammad Irwan Ratman.
author_sort Muhammad Irwan Ratman.
title Synthesis and photocatalytic activity of doped tantalates
title_short Synthesis and photocatalytic activity of doped tantalates
title_full Synthesis and photocatalytic activity of doped tantalates
title_fullStr Synthesis and photocatalytic activity of doped tantalates
title_full_unstemmed Synthesis and photocatalytic activity of doped tantalates
title_sort synthesis and photocatalytic activity of doped tantalates
publishDate 2011
url http://hdl.handle.net/10356/44673
_version_ 1759854674490425344