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

页码：518 / 527

页数：10

共 65 条

[1] Investigations on structural, vibrational, morphological and optical properties of CdS and CdS/Co films by ultrasonic spray pyrolysis [J].

Aksay, S. ;

Polat, M. ;

Ozer, T. ;

Kose, S. ;

Gurbuz, G. .

APPLIED SURFACE SCIENCE, 2011, 257 (23) :10072-10077

[2] Facile Synthesis of Sunlight-Driven AgCl:Ag Plasmonic Nanophotocatalyst [J].

An, Changhua ;

Peng, Sheng ;

Sun, Yugang .

ADVANCED MATERIALS, 2010, 22 (23) :2570-2574

[3] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[4] The interaction between polyvinylpyrrolidone and I2 as probed by Raman spectroscopy [J].

de Faria, DLA ;

Gil, HAC ;

de Queiróz, AAA .

JOURNAL OF MOLECULAR STRUCTURE, 1999, 478 (1-3) :93-98

[5] Graphene-CdS nanocomposite inactivation performance toward Escherichia coli in the presence of humic acid under visible light irradiation [J].

Deng, Can-Hui ;

Gong, Ji-Lai ;

Zeng, Guang-Ming ;

Jiang, Yan ;

Zhang, Chang ;

Liu, Hong-Yu ;

Huan, Shuang-Yan .

CHEMICAL ENGINEERING JOURNAL, 2016, 284 :41-53

[6] Confocal absorption spectral imaging of MoS2: optical transitions depending on the atomic thickness of intrinsic and chemically doped MoS2 [J].

Dhakal, Krishna P. ;

Dinh Loc Duong ;

Lee, Jubok ;

Nam, Honggi ;

Kim, Minsu ;

Kan, Min ;

Lee, Young Hee ;

Kim, Jeongyong .

NANOSCALE, 2014, 6 (21) :13028-13035

[7] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[8] Synthesis and enhanced photocatalytic performance of graphene-Bi2WO6 composite [J].

Gao, Erping ;

Wang, Wenzhong ;

Shang, Meng ;

Xu, Jiehui .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (07) :2887-2893

[9] Graphene-CdS composite, synthesis and enhanced photocatalytic activity [J].

Gao, Zhiyong ;

Liu, Ning ;

Wu, Dapeng ;

Tao, Wenguang ;

Xu, Fang ;

Jiang, Kai .

APPLIED SURFACE SCIENCE, 2012, 258 (07) :2473-2478

[10] Synthesis of CdS/ZnO/graphene composite with high-efficiency photoelectrochemical activities under solar radiation [J].

Han, Weijia ;

Ren, Long ;

Qi, Xiang ;

Liu, Yundan ;

Wei, Xiaolin ;

Huang, Zongyu ;

Zhong, Jianxin .

APPLIED SURFACE SCIENCE, 2014, 299 :12-18

← 1 2 3 4 5 6 7 →