纳米N掺杂TiO2的制备及可见光催化活性研究

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纳米N掺杂TiO₂的制备及可见光催化活性研究

於煌; 郑旭煦; 殷钟意; 陶丰; 房蓓蓓; 侯苛山

College of Environment and Bioengineering, Chongqing Technology and Business University, Chongqing 400067, China

收稿日期:2006-12-21 修回日期:1900-01-01 出版日期:2007-12-28 发布日期:2007-12-28
通讯作者: 於煌

Preparation of nitrogen-doped TiO₂ nanoparticle catalyst and its catalytic activity under visible light

YU Huang; ZHENG Xuxu; YIN Zhongyi; TAO Feng; FANG Beibei; HOU Keshan

College of Environment and Bioengineering, Chongqing Technology and Business University, Chongqing 400067, China

Received:2006-12-21 Revised:1900-01-01 Online:2007-12-28 Published:2007-12-28
Contact: YU Huang

摘要/Abstract

摘要： N-doped TiO2 nanoparticle photocatalysts were prepared through a sol-gel procedure using NH4Cl as the nitrogen source and followed by calcination at certain temperature. Systematic studies for the preparation parameters and their impact on the structure and photocatalytic activity under ultraviolet (UV) and visible light irradiation were carried out. Multiple techniques (XRD, TEM, DRIF, DSC, and XPS) were commanded to characterize the crystal structures and chemical binding of N-doped TiO2. Its photocatalytic activity was examined by the degradation of organic compounds. The catalytic activity of the prepared N-doped TiO2 nanoparticles under visible light (＞400nm) irradiation is evidenced by the decomposition of 4-chlorophenol, showing that nitrogen atoms in the N-doped TiO2 nanoparticle catalyst are responsible for the visible light catalytic activity. The N-doped TiO2 nanoparticle catalyst prepared with this modified route exhibits higher catalytic activity under UV irradiation in contrast to TiO2 without N-doping. It is suggested that the doped nitrogen here is located at the interstitial site of TiO2 lattice.

关键词: photocatalysis;TiO₂;visible light;nitrogen-doping;preparation

Abstract: N-doped TiO2 nanoparticle photocatalysts were prepared through a sol-gel procedure using NH4Cl as the nitrogen source and followed by calcination at certain temperature. Systematic studies for the preparation parameters and their impact on the structure and photocatalytic activity under ultraviolet (UV) and visible light irradiation were carried out. Multiple techniques (XRD, TEM, DRIF, DSC, and XPS) were commanded to characterize the crystal structures and chemical binding of N-doped TiO2. Its photocatalytic activity was examined by the degradation of organic compounds. The catalytic activity of the prepared N-doped TiO2 nanoparticles under visible light (＞400nm) irradiation is evidenced by the decomposition of 4-chlorophenol, showing that nitrogen atoms in the N-doped TiO2 nanoparticle catalyst are responsible for the visible light catalytic activity. The N-doped TiO2 nanoparticle catalyst prepared with this modified route exhibits higher catalytic activity under UV irradiation in contrast to TiO2 without N-doping. It is suggested that the doped nitrogen here is located at the interstitial site of TiO2 lattice.

Key words: photocatalysis, TiO2, visible light, nitrogen-doping, preparation

於煌, 郑旭煦, 殷钟意, 陶丰, 房蓓蓓, 侯苛山. 纳米N掺杂TiO₂的制备及可见光催化活性研究[J]. CIESC Journal.

YU Huang, ZHENG Xuxu, YIN Zhongyi, TAO Feng, FANG Beibei, HOU Keshan. Preparation of nitrogen-doped TiO₂ nanoparticle catalyst and its catalytic activity under visible light[J]. .

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纳米N掺杂TiO₂的制备及可见光催化活性研究

Preparation of nitrogen-doped TiO₂ nanoparticle catalyst and its catalytic activity under visible light

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