SiO_2/g-C_3N_4复合材料的制备及性能研究

Synthesis and property of SiO_2/g-C_3N_4 composite

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。

Silicon dioxide/graphitic carbon nitride（SiO_2/g-C_3N_4）composites were synthesized by electrostatic interaction.The visible absorption/electrochemical properties of composites with different particle size of SiO_2 were investigated.Fourier transform infrared spectroscopy（FTIR）,scanning electromicroscopy（SEM）,ultraviolet visible spectrophotometer（UV-Vis）and electrochemical workstation were used to determine the morphology,structure and properties of composites.The results indicated that the g-C_3N_4 was deposited between the SiO_2 particles with regular arrangement.When the particle size of SiO_2 was 430 nm,the visible light absorption of composites was the highest,and the electrochemical performance was also the best.