Novel GQD-PVP-CdS composite with enhanced visible-light-driven photocatalytic properties

被引：26
作者：
Fan, Tao [1 ]
Li, Yinle [1 ]
Shen, Jianfeng [1 ]
Ye, Mingxin [1 ]
机构：
[1] Fudan Univ, Inst Special Mat & Technol, 220 Handan Rd, Shanghai 200433, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2016年 / 367卷
关键词：
Graphene quantum dots; Cadmium sulfide; Photocatalysis; Heterogeneous photocatalysts; GRAPHENE QUANTUM DOTS; ONE-STEP SYNTHESIS; CARBON DOTS; PERFORMANCE; ZNS; DEGRADATION; ABSORPTION; EFFICIENT; GREEN; WATER;
D O I：
10.1016/j.apsusc.2016.01.194
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：
A facile one-step hydrothermal method to synthesize graphene quantum dots (GQDs)-polyvinyl pyrrolidone (PVP)-CdS nanocomposite was reported. The nanocomposite was thoroughly characterized with X-ray diffraction, transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and ultraviolet-visible spectroscopy. The results confirmed the formation of GQD-PVP-CdS composite with a uniform size (5-10 nm) and a relatively low band gap (E-g=2.23 eV). Moreover, the as-prepared composite exhibited enhanced photocatalytic activity toward the degradation of organic contaminants, with 92.3% of methyl orange (10 mg/L) removed after 3 hours of visible light illumination. This enhancement in photocatalytic activity was postulated to be attributed to the upconversion property of GQDs and a more efficient charge distribution between GQDs and CdS particles. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：518 / 527
页数：10
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