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通过静电相互作用制备得到二氧化硅/石墨型氮化碳(SiO_2/g-C_3N_4)复合材料,研究不同粒径的SiO_2颗粒对SiO_2/g-C_3N_4复合材料的可见光吸收以及电化学性能的影响。利用红外光谱和扫描电子显微镜对复合材料的结构、形貌进行表征;利用紫外可见分光光度计和电化学工作站测试复合材料的可见光吸收和电化学性能。结果表明:g-C_3N_4分散在较规整排列的SiO_2颗粒间;当SiO_2的粒径为430nm时,复合材料的可见光吸收最高,电化学性能也最好。
The SiO 2 / g-C 3 N 4 composites were prepared by electrostatic interaction to study the effect of SiO 2 particles with different particle size on the visible light absorption and electrochemical performance of SiO 2 / g-C 3 N 4 composites. The structure and morphology of the composites were characterized by infrared spectroscopy and scanning electron microscopy. The visible light absorption and electrochemical properties of the composites were tested by UV-Vis spectrophotometer and electrochemical workstation. The results show that: g-C_3N_4 is dispersed in the more aligned SiO 2 particles; when the particle size of SiO_2 is 430 nm, the composite has the highest visible light absorption and the best electrochemical performance.