{001} Facets of anatase TiO2 show high photocatalytic selectivity

{001} Facets of anatase TiO2 show high photocatalytic selectivity
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{001} 锐钛矿型 TiO2 的晶面表现出高光催化选择性

DOI:
10.1016/j.matlet.2012.04.045
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发表时间:
2012-07
期刊:
影响因子:
3
通讯作者:
Ji, Zhenguo
Ji, Zhenguo
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhang, Jun;Chen, Wanke;Xi, Junhua;Ji, Zhenguo

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{001}偶氮染料的光催化降解实验证实了纳米TiO 2的晶面具有良好的光催化选择性。发现染料在TiO 2 {001}晶面上存在一种新的吸附和降解竞争现象,具有大比例{001}晶面的TiO 2纳米片对亚甲基蓝的吸附和降解优于对甲基橙子和罗丹明B的吸附和降解.取代表面上的带电化学基团吸附,活性氧原子和{001}面上的光生空穴的分离被认为是高光催化选择性的关键因素。
{001} Facets of anatase TiO2show excellent photocatalytic selectivity which is confirmed by photo-degradation of azo dye molecules. A novel adsorption and degradation competition between dyes on the {001} facets of TiO2is found. The TiO2nanosheets with a large percentage of exposed {001} facets show preferential adsorption and photo-degradation of methylene blue than methyl orange and rhodamine B. Instead of charged chemical group adsorption on the surface, the reactive oxygen atoms and separation of photo-induced holes on {001} facets are consider to be key factors for the high photocatalytic selectivity.
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