Synthesis of Ag-SiO2 composite nanospheres and their catalytic activity |
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Authors: | QingYan Han GuiAn Li DeXuan Wang EnJie He Jun Dong Wei Gao JunNa Li TingZhuo Liu ZhongYue Zhang HaiRong Zheng |
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Affiliation: | 1. School of Physics and Information Technology, Shaanxi Normal University, Xi’ an, 710119, China
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Abstract: | A simple, mild, and time-saving method is employed to synthesize Ag-SiO2 composite nanospheres with Ag nanoparticles uniformly distributed on the surface of SiO2 nanoparticles. The chemical elements and the morphology of Ag-SiO2 composite nanospheres were analyzed with transmission electron microscopy (TEM), X-ray power diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). On the surface of Ag-SiO2 composite nanospheres, silane coupling agent (KH-550) is introduced as an intermediary to connect the surfaces of SiO2 nanospheres and Ag nanoparticles, which is also helpful for avoiding the aggregation of Ag nanoparticles. It is found that Ag-SiO2 composite nanospheres have very good catalytic properties for the reduction of organic dyes, which may have potential application in wastewater treatment. |
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Keywords: | highly dispersed Ag-SiO composite nanospheres catalysis |
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