标题:Enhancing the Photocatalytic Hydrogen Evolution Activity of Mixed-Halide Perovskite CH3NH3PbBr3-xIx Achieved by Bandgap Funneling of Charge Carriers
作者:Wu, Yaqiang; Wang, Peng; Guan, Zihan; Liu, Junxue; Wang, Zeyan; Zheng, Zhaoke; Jin, Shengye; Dai, Ying; Whangbo, Myung-Hwan; Huang, 更多
作者机构:[Wu, Yaqiang; Wang, Peng; Guan, Zihan; Wang, Zeyan; Zheng, Zhaoke; Huang, Baibiao] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, P 更多
通讯作者:Wang, P;Huang, BB;Wang, Peng
通讯作者地址:[Wang, P; Huang, BB]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China.
来源:ACS CATALYSIS
出版年:2018
卷:8
期:11
页码:10349-10357
DOI:10.1021/acscatal.8b02374
关键词:perovskite; photocatalysis; halide gradient; bandgap funneling; hydrogen; evolution
摘要:Powder samples of mixed halide perovskite MAPbBr(3-x)I(x) (MA = methylammonium ion, CH3NH3+) were prepared by employing a facile light-assisted halide-exchange method in aqueous halide solution at room temperature. It is found that the distribution of iodide ions in the MAPbBr(3-x)I(x) particles tends to be largest on the surface and becomes lower on going into the interior so that they have a correct bandgap funnel structure that is needed for transferring photogenerated charge carriers from the interior to the surface. Consequently, the MAPbBr(3-x)I(x)/Pt powder sample (250 mg) exhibits an enhanced photocatalytic activity for a H-2 evolution under visible light (100 mW cm(-2), lambda > 420 nm) with the rate of 651.2 mu mol h(-1) and a solar-to-chemical conversion efficiency of 1.05%.
收录类别:EI;SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054820844&doi=10.1021%2facscatal.8b02374&partnerID=40&md5=09509b88060fdc2735f2cfb0100d9231
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