Photocatalytic hydrogen production over plasmonic AuCu/CaIn2S4 composites with different AuCu atomic arrangements

被引：50
作者：
Ding, Jianjun [1 ,2 ]
Li, Xiangyang [1 ,2 ]
Chen, Lin [1 ,2 ]
Zhang, Xian [1 ,2 ]
Tian, Xingyou [1 ,2 ]
机构：
[1] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Hefei 230088, Anhui, Peoples R China
[2] Chinese Acad Sci, CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Anhui, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 224卷
基金：
中国国家自然科学基金;
关键词：
CaIn2S4; AuCu; Atomic arrangement; Photocatalytic hydrogen production; Plasmonic photocatalysts; BIMETALLIC ALLOY NANOPARTICLES; VISIBLE-LIGHT; SPATIAL SEPARATION; CATALYTIC-ACTIVITY; ENERGY-TRANSFER; FORMIC-ACID; CU ALLOY; SURFACE; TIO2; METAL;
D O I：
10.1016/j.apcatb.2017.10.045
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Plasmonic AuCu bimetallic nanoparticles supported on monoclinic CaIn2S4 have been synthesized through the photoreduction method, by which AuCu bimetallic nanoparticles with different atomic arrangements were site-selectively photo-deposited at the edges of CaIn2S4 surface nanosteps. The obtained plasmonic composites were characterized by XRD, TEM, photoelectrochemical analysis, XPS, UV-vis and PL spectroscopy. The results showed that AuCu bimetallic nanoparticles with alloy structure showed better performance for light absorption, charge separation and photocatalytic activity compared to AuCu core-shell structure. Especially, alloyed Au0.4Cu0.1/CaIn2S4 composite exhibited the highest visible activity for hydrogen production from Na2S/Na2SO3 solution with a rate of 452.8 mu mol/h, over 2.2, 10.0, 63.8 and 76.7 times higher than that of core-shell Cu-0.1/Au-0.4/CaIn2S4, Au-0.3/CaIn2S4, Cu-0.3/CaIn2S4 and CaIn2S4, respectively. The enhanced photocatalytic performance of AuCu/CaIn2S4 composites could be mainly ascribed to the synergistic effect in AuCu bimetallic nanoparticles and the surface plasmon resonance effect of Au.
引用
收藏
页码：322 / 329
页数：8
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