g-C_3N_4/α-Fe_2O_3的制备及其降解甲苯性能

The preparation of g-C_3N_4/α-Fe_2O_3 and toluene degradation performance

采用水热和球磨混合方法,构建了g-C3N4/α-Fe2O3异质结复合光催化体系,通过XRD、SEM、EDS、DRS、FT-IR等研究其表面形貌特点及光学性质,并利用原位红外光谱技术和气相色谱技术检测了复合材料对甲苯的可见光降解活性。结果表明,α-Fe2O3/g-C3N4复合体系对甲苯有较高的可见光降解活性,复合体系中g-C3N4和α-Fe2O3不同能级之间良好的协同效应,可实现光生电子-空穴的有效分离,大大提高光电转化效率,进一步提高复合材料的降解活性。

Heterojunction composite system g-C3N4/α-Fe2O3 was prepared to develop highly-efficient photocatalytic materials by solvent heating and ball milling method.Its surface morphology and optical properties were characterized by XRD,SEM,EDS,DRS and FTIR.The activity of visible light degradation to toluene was tested by in stiu FTIR and gas chromatography technology.The results indicated that g-C3N4/α-Fe2O3 composite system had high activity of visible light degradation to toluene.Coordinated effect of composite system between different energy levels caused effective separation of electric holes.The photoelectric conversion efficiency and degradation activity of composite system were improved.