文献类型：期刊文献

英文题名：Preparation of silver/graphene/polymer hybrid microspheres and the study of photocatalytic degradation

作者：Fang, Rui[1];Ge, Xueping[2];Du, Ming[1];Li, Zhi[1];Yang, Cunzhong[1];Fang, Bin[1];Liang, Ying[1]

机构：[1]E China Univ Sci & Technol, Sch Sci, Inst Nucl Technol & Applicat, Shanghai 200237, Peoples R China;[2]Univ Kansas, Sch Engn, Bioengn Res Ctr, Lawrence, KS 66045 USA

年份：2014

卷号：292

期号：4

起止页码：985

外文期刊名：COLLOID AND POLYMER SCIENCE

收录：;EI(收录号：20141717603478);WOS:【SCI-EXPANDED(收录号:WOS:000334051800021)】；

基金：This work was financially supported by the National Natural Science Foundation of China (no. 51103039, 51301071), the Science and Technology Commission of Shanghai Municipality (no. 13PJ1401800), the Innovation Program of Shanghai Municipal Education Commission (no. 14ZZ057), and the Fundamental Research Funds for the Central Universities (no. 222201314059).

语种：英文

外文关键词：Three-dimensional graphene; Silver nanoparticle; Microspheres; Photocatalytic degradation

摘要：Three-dimensional silver/graphene/polymer hybrid microspheres were prepared to depress the aggregation of two-dimensional graphene. Graphene oxide (GO) sheets were successfully wrapped on the surface of amine-functionalized polystyrene-poly (glycidyl methacrylate) (PS-PGMA) microspheres (similar to 3 mu m in diameter) to form graphene oxide/amino-microsphere (GO/AMS) core-shell structure. Subsequently, the wrapped GO sheets were reduced by using hydrazine hydrate as the reducing agents, meanwhile decorated with silver nanoparticles on the wrinkled surface to form Ag-rGO/AMS hybrid microspheres with monodisperse distributions in shape and diameter. The resulting materials were characterized by power X-ray diffraction, scanning electron microscope, Raman spectra, and ultraviolet-visible (UV-vis) absorption spectra. Since Ag nanoparticles behave surface plasmon resonance effect and rGO structure can improve the separation of photogenerated electrons and holes, the Ag-rGO/AMS composites present good photocatalytic activities for the degradation of methylene blue (MB) as 93 % MB were degraded after 2.5 h under irradiation.