文献类型：期刊文献

英文题名：Efficient visible light photocatalytic activity of p-n junction CuO/TiO2 loaded on natural zeolite

作者：Zhao, Lei[1];Cui, Ting[2];Li, Yajun[2];Wang, Bo[2];Han, Jianhua[2];Han, Li[2];Liu, Zhifeng[2]

第一作者：赵磊

通讯作者：Liu, ZF[1]

机构：[1]Xinxiang Univ, Sch Civil Engn & Achitecture, Xinxiang 453003, Peoples R China;[2]Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

第一机构：新乡学院土木工程与建筑学院

通讯机构：[1]corresponding author), Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China.

年份：2015

卷号：5

期号：79

起止页码：64495-64502

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20153201113749);Scopus(收录号：2-s2.0-84938651520);WOS:【SCI-EXPANDED(收录号:WOS:000358786400059)】；

基金：The authors gratefully acknowledge financial support from Technology Development Foundation Plan Project of Tianjin Colleges (No. 20140309).

语种：英文

外文关键词：Charge transfer - Complexation - Computer software reusability - Copper oxides - Light - Magnetic semiconductors - Oxide minerals - Rate constants - Semiconductor junctions - Titanium dioxide - Wastewater treatment - Zeolites

摘要：Highly efficient and visible-light-responsive p-n junction CuO/TiO2-zeolite heterogeneous nanostructures had been successfully synthesized by a standard impregnation method. A detailed study of p-n junction CuO/TiO2-zeolite impacting on the photodecoloration of a MB solution showed that the composite was highly reusable and stable for long-running photocatalytic application. The apparent rate constant of the CuO/TiO2-zeolite was calculated to be 0.0704 min(-1), which is 1.4 times higher than that of TiO2-zeolite (k = 0.048 min(-1)) and 1.9 times higher than that of zeolite (k = 0.0368 min(-1)). The experimental results indicated that the composites had a superior photocatalytic activity for the decoloration of dye wastewater under visible light irradiation because the p-n junction was formed between CuO and TiO2. The assembly of p-type CuO produces a large number of p-n junction heterostructures on the surface of TiO2, where CuO and TiO2 form p-and n-type semiconductors, respectively. The p-n junction could efficiently suppress charge recombination, improve interfacial charge transfer, enhance visible-light adsorption and provide plentiful photocatalytic reaction active sites. This new p-n junction heteronanostructure is expected to show considerable potential application in solar-driven wastewater treatment.