A facile cation-exchange approach to 2D PbS/amorphous MoSx heterojunction composites with enhanced photocatalytic activity

被引：19
作者：
Li, Ming [1 ]
Wang, Xiandong [1 ]
Ruan, Haoran [1 ]
Zhang, Qingyan [1 ]
Wu, Zhenjun [2 ]
Liu, Yongping [1 ]
Lu, Zhenhuan [1 ]
Hai, Jiefeng [1 ]
机构：
[1] Guilin Univ Technol, Coll Chem & Biol Engn, Guangxi Key Lab Electrochem & Magnetochem Funct M, Guilin 541004, Peoples R China
[2] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Prov Hunan Key Lab Graphene Mat & Devices, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 768卷
基金：
中国国家自然科学基金;
关键词：
Photocatalysis; Amorphous MoSx; Cation-exchange reaction; PbS/a-MoSx; AMORPHOUS MOLYBDENUM SULFIDE; THIN-FILM; AMMONIUM TETRATHIOMOLYBDATE; GRAPHENE OXIDE; MONO LAYER; HYDROGEN; EVOLUTION; COCATALYST; NANOSHEETS; WATER;
D O I：
10.1016/j.jallcom.2018.07.280
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：
Constructing heterojunction is one of the methods for improving the photocatalytic activity by restraining the electron-hole recombination. In this work, a simple cation-exchange approach was employed to grow amorphous MoSx (a-MoSx) on PbS surface to fabricate PbS/a-MoSx heterojunction for the first time. The formation of a-MoSx has been confirmed by XRD, Raman, TEM, EDS and XPS analysis. PbS/a-MoSx composites showed improved light harvesting ability compared with pristine PbS. The optimized composite exhibited greatly enhanced photocatalytic activity using methylene blue as the target of elimination, and displayed a photocurrent about 9 times higher than pristine PbS due to the efficient separation of photogenerated electron-hole pairs. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：399 / 406
页数：8
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