磁性ZnO/Fe_(3)O_(4)/g-C_(3)N_(4)三元复合材料的制备及对甲基橙的降解  

Preparation of magnetic ZnO/Fe_(3)O_(4)/g-C_(3)N_(4) ternary composites and degradation of Methyl Orange

作　　者：梁丽娟 许凤霞 LIANG Lijuan;XU Fengxia(School of Biological and Environmental Engineering,Tianjin Vocational Institute,Tianjin 300410,China)

机构地区：[1]天津市职业大学生物与环境工程学院,天津300410

出　　处：《印染》2024年第9期63-68,共6页China Dyeing and Finishing

基　　金：天津市自然科学基金项目(19JCYBJC23500)。

摘　　要：通过蒸发溶剂-高温热聚合法制备了磁性ZnO/Fe_(3)O_(4)/g-C_(3)N_(4)三元复合材料,采用X射线衍射(XRD)、红外光谱(FTIR)、透射电镜(TEM)、紫外可见漫反射光谱(UV-vis DRS)、荧光光谱(PL)、N2吸附-脱附(BET)、瞬态光电流谱(TPC)和交流阻抗(EIS)等手段对三元复合材料进行了表征,并将其用于甲基橙(MO)染料废水的光催化降解。结果表明:磁性ZnO/Fe_(3)O_(4)/g-C_(3)N_(4)三元复合材料中异质结的存在实现了高效的光电子-空穴分离,光谱吸收范围得到拓宽,表现出超顺磁性,具有优异的光催化性能。可见光照射150 min,MO染料溶液的光催化降解率为98.6%,TOC去除率为59.9%;循环使用5次后MO的降解率仍达到了97.8%,表现出良好的循环使用稳定性。Magnetic ZnO/Fe_(3)O_(4)/g-C_(3)N_(4) ternary composites are prepared by evaporation solvent-high tempera-ture thermal polymerization.The ternary composites are characterized by X-ray diffraction(XRD),infrared spectroscopy(FTIR),transmission electron microscopy(TEM),ultraviolet-visible diffuse reflectance spectros-copy(UV-vis DRS),fluorescence spectroscopy(PL),N2 adsorption-desorption(BET),transient photocurrent spectroscopy(TPC)and electrochemical impedance spectroscopy(EIS).It is applied to the photocatalytic deg-radation of Methyl Orange(MO)dye wastewater.The results show that the existence of heterojunction in the magnetic ZnO/Fe_(3)O_(4)/g-C_(3)N_(4) ternary composite material achieves efficient photoelectron-hole separation,broadens the spectral absorption range,and exhibits superparamagnetism,which makes it possess excellent photocatalytic performance.Under visible light irradiation for 150 min,the photocatalytic degradation rate of MO dye solution is 98.6%,and the TOC removal rate is 59.9%.After 5 recycles,the degradation rate of MO still reaches 97.8%,showing good recycling stability.

关 键 词：光催化降解 ZnO/Fe_(3)O_(4)/g-C_(3)N_(4) 三元复合材料 甲基橙 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程] O643.36[轻工技术与工程—纺织科学与工程] O644.1[理学—物理化学]