N-doped rutile TiO2 nano-rods show tunable photocatalytic selectivity
N-doped rutile TiO2 nano-rods show tunable photocatalytic selectivity
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N掺杂金红石TiO2纳米棒表现出可调节的光催化选择性
DOI：
10.1016/j.jallcom.2013.04.007
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发表时间：
2013-10-25
影响因子：
6.2
通讯作者：
Ji, Zhenguo
中科院分区：
文献类型：
--
作者：
Zhang, Jun;Fu, Wei;Ji, Zhenguo
与以往的研究工作主要是通过掺杂来提高TiO 2的可见光吸收和光催化活性不同，本研究发现N掺杂的金红石型TiO 2纳米棒具有可调的光催化选择性。偶氮染料的光降解证实了这一发现。结果表明，纯金红石型TiO 2对亚甲基蓝和甲基橙子（MO）混合溶液的光催化降解基本没有选择性，而N掺杂的金红石型TiO 2对MO具有光催化选择性。N掺杂已被证明大大改变表面状态比能带结构的二氧化钛。在更深层次的分析中，一些掺杂的N原子取代了金红石型TiO 2 {110}面上的表面饱和的O-3c，并作为不饱和的N-3c，这提高了吸附剂的选择性和相应的MO的光催化活性。本研究希望通过对TiO 2中非金属掺杂的深入了解，可以开发出一种新的光催化选择性策略。(C)2013爱思唯尔有限公司版权所有。
Different from many works which focus on doping to improve the visible light absorption and the photocatalytic activity of TiO2, this work finds that the N-doped rutile TiO2 nano-rods have tunable photocatalytic selectivity. This finding was confirmed by the photo-degradation of azo dyes. Results reveal that pure rutile TiO2 mainly exhibit no selectivity in the photocatalytic degradation of a methylene blue and methyl orange (MO) mixed solution, whereas N-doped rutile TiO2 exhibits photocatalytic selectivity for MO. N doping has been shown to greatly change the surface state than the energy band structure of TiO2. In a deeper analysis, some doped N atoms replace surface saturated O-3c on the {110} facets of rutile TiO2 and act as unsaturated N-3c, which enhances adsorbent selectivity and relevant photocatalytic activity of MO. This research hopes that by providing a deeper understanding of non-metal doping in TiO2, a new strategy for photocatalytic selectivity can be developed. (C) 2013 Elsevier B.V. All rights reserved.