Facile synthesis of novel hierarchical graphene-Bi2O2CO3 composites with enhanced photocatalytic performance under visible light

被引：186
作者：
Madhusudan, Puttaswamy [1 ]
Yu, Jiaguo [1 ]
Wang, Wenguang [1 ]
Cheng, Bei [1 ]
Liu, Gang [2 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
来源：
DALTON TRANSACTIONS | 2012年 / 41卷 / 47期
关键词：
TEMPLATE-FREE FABRICATION; HOLLOW MICROSPHERES; HYDROTHERMAL SYNTHESIS; TIO2-GRAPHENE NANOCOMPOSITES; H-2-PRODUCTION ACTIVITY; SOLVOTHERMAL SYNTHESIS; TIO2; PARTICLES; ANATASE TIO2; GRAPHENE; DEGRADATION;
D O I：
10.1039/c2dt31528a
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A facile template-free hydrothermal approach is developed to synthesize hierarchical flower-like graphene-Bi2O2CO3 microcomposites. The as-prepared samples were systematically characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, N-2 adsorption-desorption and UV-visible diffuse reflectance spectroscopy. The photocatalytic activity of the as-prepared samples was evaluated towards degradation of Rhodamine B (RhB) under visible light. Compared to hierarchical Bi2O2CO3, hierarchical flower-like graphene-Bi2O2CO3 microcomposites show enhanced photocatalytic activity. In addition, our results indicate that both the physico-chemical properties and associated photocatalytic activity of graphene-Bi2O2CO3 composites are shown to be dependent on graphene loadings. The highest photocatalytic performance can be achieved for the graphene-Bi2O2CO3 microcomposites with 1.0 wt% graphene. The underlying mechanism responsible for the formation of graphene-Bi2O2CO3 composites and enhanced photoreactivity was discussed. Results from this study illustrate an entirely new approach to fabricate semiconductor composites containing graphene-bismuth with high visible-responsive photocatalytic performance.
引用
收藏
页码：14345 / 14353
页数：9
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