期刊
COLLOID AND POLYMER SCIENCE
卷 292, 期 4, 页码 985-990出版社
SPRINGER
DOI: 10.1007/s00396-013-3148-x
关键词
Three-dimensional graphene; Silver nanoparticle; Microspheres; Photocatalytic degradation
资金
- National Natural Science Foundation of China [51103039, 51301071]
- Science and Technology Commission of Shanghai Municipality [13PJ1401800]
- Innovation Program of Shanghai Municipal Education Commission [14ZZ057]
- Fundamental Research Funds for the Central Universities [222201314059]
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.
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