title: Facile synthesis of novel hierarchical graphene-Bi2O2CO3 composites with enhanced photocatalytic performance under visible light.
abstract: A facile template-free hydrothermal approach is developed to synthesize hierarchical flower-like graphene-Bi(2)O(2)CO(3) 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 Bi(2)O(2)CO(3), hierarchical flower-like graphene-Bi(2)O(2)CO(3) microcomposites show enhanced photocatalytic activity. In addition, our results indicate that both the physico-chemical properties and associated photocatalytic activity of graphene-Bi(2)O(2)CO(3) composites are shown to be dependent on graphene loadings. The highest photocatalytic performance can be achieved for the graphene-Bi(2)O(2)CO(3) microcomposites with 1.0 wt% graphene. The underlying mechanism responsible for the formation of graphene-Bi(2)O(2)CO(3) 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.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China.
authors.forename: Puttaswamy
authors.initials: P
authors.lastname: Madhusudan
authors.forename: Jiaguo
authors.initials: J
authors.lastname: Yu
authors.forename: Wenguang
authors.initials: W
authors.lastname: Wang
authors.forename: Bei
authors.initials: B
authors.lastname: Cheng
authors.forename: Gang
authors.initials: G
authors.lastname: Liu