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

被引：188

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

页码：14345 / 14353

页数：9

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