期刊
JOURNAL OF CATALYSIS
卷 381, 期 -, 页码 530-539出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2019.11.037
关键词
Piezo-material; Piezocatalysis; SnO2; Metronidazole
资金
- National Natural Science Foundation of China [21677180, 21777196]
- Science and Technology Key Projects of Guangdong Province [2014B020216004, 2015B020237005]
Piezocatalysis is an emerging green advanced-oxidation technology for the degradation of toxic pollutants; however, piezomaterials are not generally excellent electrocatalysts. Herein, two complex piezocatalysts (SnO2/t-BaTiO3 and SnO2-Sb/t-BaTiO3) consisting of an electrocatalyst and piezomaterial, respectively, are designed to investigate the coupled effect of piezocatalytic and electrocatalytic processes on the degradation of pollutants. SnO2, especially SnO2-Sb, can considerably enhance the piezocatalytic degradation of the antibiotic metronidazole (MNZ). The piezocatalytic rate constants of SnO2/tBaTiO(3) and SnO2-Sb/t-BaTiO3 are 2.3 and 3.0 times that of t-BaTiO3, respectively. In the degradation process, SnO2 and SnO2-Sb are confirmed to act as dimensionally stable anode-like (DSA-like) catalysts because they can increase the response of the piezoelectrochemical anodic current and the generation of (OH)-O-center dot radicals as well as reduce the formation of O-1(2). Significantly, the piezoelectric field can drive not only the free charges of t-BaTiO3 and its remnant piezoelectric field but also those of the loaded electrocatalyst SnO2 to participate in the degradation of MNZ. These results indicate that the coupling of an excellent electrocatalyst and piezomaterial is an effective method to promote piezocatalytic efficiency. (C) 2019 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据