MnFe_(2)O_(4)/TiO_(2)的制备及其类芬顿光催化性能

Preparation of MnFe_(2)O_(4)/TiO_(2) and Its Fenton-Like Photocatalytic Properties

以溶胶-凝胶法成功制备了MnFe_(2)O_(4)/TiO_(2)类芬顿(Fenton)光催化剂,通过XRD、SEM、UV-vis对材料的结构和形貌进行表征,并以亚甲基蓝(MB)为目标污染物,对其进行降解,考察了不同掺杂量(质量分数)的产物在可见光下的光催化性能。结果表明,在光源为300 W的碘钨灯、MnFe_(2)O_(4)掺杂量为2%、催化剂质量为60 mg、pH=11、H_(2)O_(2)浓度为8 mmol/L时,光照180 min后,MnFe_(2)O_(4)/TiO_(2)的光催化类Fenton反应对MB的降解率高达96.8%。相同条件下与未掺杂的纯TiO_(2)相比,MnFe_(2)O_(4)/TiO_(2)在可见光下对MB的催化性能有了明显提升。

MnFe_(2)O_(4)/TiO_(2) Fenton-like photocatalyst was successfully prepared by sol-gel method,the structure and morphology of the sample were characterized by XRD,SEM and UV-vis.MB was used as the target pollutant for degradation,and the photocatalytic properties of products with different doping amounts were investigated in visible light.The results show that:The degradation rate of TMF Fenton-like photocatalytic reaction to MB is up to 96.8%,under the optimum conditions,in the iodinetungsten lamp with a light source of 300 W,the doping amount of MnFe_(2)O_(4) to TiO_(2) is 2%,the mass of catalyst is 60 mg,pH=11,and the concentration of H_(2)O_(2) is 8 mmol/L.Under the same conditions,compare with the undoped pure TiO2,the catalytic performance of MnFe_(2)O_(4)/TiO_(2) for MB under visible light is significantly improved.