Innovative W-doped titanium dioxide anchored on clay for photocatalytic removal of atrazine

被引：67

作者：

Belver, C. ^{[1
]}

Han, C. ^{[2
]}

Rodriguez, J. J. ^{[1
]}

Dionysiou, D. D. ^{[2
]}

机构：

[1] Univ Autonoma Madrid, Fac Ciencias, Secc Ingn Quim, Campus Cantoblanco, E-28049 Madrid, Spain

[2] Univ Cincinnati, Dept Biomed Chem & Environm Engn, Environm Engn & Sci Program, Cincinnati, OH 45221 USA

来源：

CATALYSIS TODAY | 2017年 / 280卷

关键词：

W-doped TiO2; Novel clay-derived heterostructures; Atrazine removal; Solar photocatalysis; ORGANIC PERSISTENT POLLUTANTS; VISIBLE-LIGHT IRRADIATION; WASTE-WATER; EMERGING CONTAMINANTS; ANATASE TIO2; OXIDE; HETEROSTRUCTURES; DEGRADATION; CATALYSTS;

D O I：

10.1016/j.cattod.2016.04.029

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Innovative W-TiO2/clay photocatalysts were successfully synthesized by a facile sol-gel method using different W dopant concentrations (0.5, 2 and 5 M%). The obtained photocatalysts were characterized by XRD, TEM, XPS, textural analysis and DRS-UV-vis spectroscopy. The W-TiO2/clay photocatalysts have TiO2 as anatase phase, where W dopant caused the increase of its crystal size and the distortion of its lattice, due to W substitution of Ti ions. W dopant also modified the electronic properties of anatase, resulting in moderately narrower band gap of photocatalysts. Photocatalytic activity measurements showed that W-TiO2/clay catalyst with 5% of W possed the best photocatalytic performance for the removal of atrazine under solar light compared to un-doped TiO2/clay, which was explained by the presence of W ions in the TiO2 structure. The relevance of W doping on the photocatalytic performance of these photocatalysts was also corroborated studying the activity under visible light. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：21 / 28

页数：8

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