Effect of N-doping on visible light activity of TiO2-SiO2 mixed oxide photocatalysts

被引：19

作者：

Aman, Noor ^{[1
]}

Das, N. N. ^{[2
]}

Mishra, T. ^{[3
]}

机构：

[1] BS Abdur Rahman Univ, Dept Chem, Madras 600048, Tamil Nadu, India

[2] Ravenshaw Univ, Dept Chem, Cuttack 753003, Orissa, India

[3] CSIR Natl Met Lab, CSE Div, Jamshedpur 831007, Bihar, India

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2016年 / 4卷 / 01期

关键词：

Photocatalyst; Binary oxides; Nitrogen doping; Semiconductor; Visible light activity; Thermal stability;

D O I：

10.1016/j.jece.2015.10.037

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present report deals with the effect of nitrogen doping on TiO2-SiO2 mixed oxide photocatalysts. Advantageous effect of mixing SiO2 with TiO2 and subsequent N doping on the visible light photocatalysis is discussed. Hydrazine is used as the nitrogen doping source. Mixed Oxide to hydrazine ratio is varied from 1: 2 to 1: 8 to study the hydrazine concentration effect on the surface and photocatalytic properties. Presence of silica increases the surface area and thermal stability of anatase phase whereas nitrogen doping enhances the visible light absorption. Presence of substitutional nitrogen and oxygen vacancy in TiO2 lattice is due to the use of hydrazine which is also a reducing agent. Material prepared with 1: 6 hydrazine ratio (TiSi-6N) shows surface area of 260 m(2)/g and light absorption up to 520 nm. Under visible light only TiSi-6N is able to completely reduce Se(VI) into its elemental form within 90 min of reaction. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：191 / 196

页数：6

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