Synthesis of CuS and CuS/ZnS core/shell nanocrystals for photocatalytic degradation of dyes under visible light

被引：117
作者：
Ung Thi Dieu Thuy [1 ]
Nguyen Quang Liem [1 ]
Parlett, Christopher M. A. [2 ]
Lalev, Georgi M. [2 ]
Wilson, Karen [2 ]
机构：
[1] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam
[2] Cardiff Univ, Sch Chem, Cardiff Catalysis Inst, Cardiff CF10 3AT, S Glam, Wales
来源：
CATALYSIS COMMUNICATIONS | 2014年 / 44卷
基金：
欧盟第七框架计划;
关键词：
CuS; CuS/ZnS core/shell nanocrystals; Hydrothermal synthesis; Photocatalytic activity; Water depollution; COPPER SULFIDE NANOPARTICLES; LARGE-SCALE SYNTHESIS; NANOTUBES; EFFICIENT; FACILE; NANOWIRES; ABLATION; ROUTE;
D O I：
10.1016/j.catcom.2013.07.030
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：
High quality CuS and CuS/ZnS core/shell nanocrystals (NCs) were synthesized in a large quantity using a facile hydrothermal method at low temperatures of 60 degrees C and evaluated in the photodegradation of Rhodamine B (RhB) under visible light irradiation. Synthesis time plays an important role in controlling the morphology, size and photocatalytic activity of both CuS and CuS/ZnS core/shell NCs which evolve from spherical shaped particles to form rods with increasing reaction time, and after 5 h resemble "flower" shaped morphologies in which each "flower" is composed of many NCs. Photocatalytic activity originates from photo-generated holes in the narrow bandgap CuS, with encapsulation by large bandgap ZnS layers used to form the core/shell structure that improves the resistance of CuS towards photocorrosion. Such CuS/ZnS core/shell structures exhibit much higher photocatalytic activity than CuS or ZnS NCs alone under visible light illumination, and is attributed to higher charge separation rates for the photo-generated carriers in the core/shell structure. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 67
页数：6
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