Effect of pH on the synthesis and characteristics of RGO-CdS nanocomposites

被引：19

作者：

Johra, Fatima Tuz ^{[1
]}

Jung, Woo-Gwang ^{[1
]}

机构：

[1] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea

来源：

APPLIED SURFACE SCIENCE | 2014年 / 317卷

基金：

新加坡国家研究基金会;

关键词：

Reduced graphene oxide; Cadmium sulfide; pH; Photocatalyst; Staircase band structure; MICROWAVE-ASSISTED REACTION; GRAPHENE OXIDE COMPOSITES; SENSITIZED SOLAR-CELLS; ONE-STEP SYNTHESIS; PHOTOCATALYTIC DEGRADATION; HYDROTHERMAL SYNTHESIS; GRAPHITE OXIDE; NANOPARTICLES; DYES; REDUCTION;

D O I：

10.1016/j.apsusc.2014.09.029

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：

The effect of pH on the synthesis of reduced graphene oxide (RGO)-CdS nanocomposites via a hydrothermal method was investigated. Higher pH is more favorable for the formation of good quality RGO-CdS nanocomposites. The photocatalytic performance of the composites was investigated by measuring the reduction of Cr(VI), and the composite synthesized at high pH (=11) exhibited a 76% removal rate of Cr(VI). At high pH, the development of CdS particles of smaller sizes and the maximum number of Tr-electrons available in RGO increased the effective surface area available for light absorption, fast electron transport, and enhanced light absorption intensity. The staircase band structure of CdS in combination with RGO helped to inhibit electron-hole recombination, which enhanced photocatalytic activity. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1015 / 1021

页数：7

共 32 条

[1] Solution-based fabrication of a graphene-ZnO nanocomposite [J].

Johra, Fatima Tuz ;

Lee, Mi-Jung ;

Jung, Woo-Gwang .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2013, 66 (03) :481-487

[2] Nanotwinning and structural phase transition in CdS quantum dots [J].

Kumar, Pragati ;

Saxena, Nupur ;

Chandra, Ramesh ;

Gupta, Vinay ;

Agarwal, Avinash ;

Kanjilal, Dinakar .

NANOSCALE RESEARCH LETTERS, 2012, 7 :1-7

[3] Hydrothermal synthesis of graphene-CdS composites with improved photoelectric characteristics [J].

Lei, Yun ;

Li, Rong ;

Chen, Feifei ;

Xu, Jun .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2014, 25 (07) :3057-3061

[4] ZnO@graphene composite with enhanced performance for the removal of dye from water [J].

Li, Baojun ;

Cao, Huaqiang .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (10) :3346-3349

[5] Electrosorption behavior of graphene in NaCl solutions [J].

Li, Haibo ;

Lu, Ting ;

Pan, Likun ;

Zhang, Yanping ;

Sun, Zhuo .

JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (37) :6773-6779

[6] MoS2 Nanoparticles Grown on Graphene: An Advanced Catalyst for the Hydrogen Evolution Reaction [J].

Li, Yanguang ;

Wang, Hailiang ;

Xie, Liming ;

Liang, Yongye ;

Hong, Guosong ;

Dai, Hongjie .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (19) :7296-7299

[7] Anchoring Semiconductor and Metal Nanoparticles on a Two-Dimensional Catalyst Mat. Storing and Shuttling Electrons with Reduced Graphene Oxide [J].

Lightcap, Ian V. ;

Kosel, Thomas H. ;

Kamat, Prashant V. .

NANO LETTERS, 2010, 10 (02) :577-583

[8] Solvothermal synthesis of graphene-CdS nanocomposites for highly efficient visible-light photocatalyst [J].

Liu, Fengzhen ;

Shao, Xin ;

Wang, Jinqing ;

Yang, Shengrong ;

Li, Huaiyong ;

Meng, Xianhua ;

Liu, Xuehua ;

Wang, Min .

JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 551 :327-332

[9] Investigation of photocatalytic activities over ZnO-TiO2-reduced graphene oxide composites synthesized via microwave-assisted reaction [J].

Liu, Xinjuan ;

Pan, Likun ;

Lv, Tian ;

Sun, Zhuo .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2013, 394 :441-444

[10] Microwave-assisted synthesis of CdS-reduced graphene oxide composites for photocatalytic reduction of Cr(VI) [J].

Liu, Xinjuan ;

Pan, Likun ;

Lv, Tian ;

Zhu, Guang ;

Sun, Zhuo ;

Sun, Changqing .

CHEMICAL COMMUNICATIONS, 2011, 47 (43) :11984-11986

← 1 2 3 4 →