摘要
利用乳液界面法制备的复合材料在增强光催化活性方面具有显著优势。通过乳液界面法制备了ZnCl_(2)/NH_(2)-MIL-125(Ti)复合光催化材料,利用X射线粉末衍射、傅里叶变换红外光谱、扫描电子显微镜、X射线光电子能谱、比表面积及孔隙分析、紫外-可见漫反射光谱等分析方法对催化剂结构进行了表征,考察了复合材料光催化还原六价铬(Cr(Ⅵ))的性能,探讨了光催化反应机理及催化剂的重复利用性。结果表明,乳液界面法会显著影响ZnCl_(2)/NH_(2)-MIL-125(Ti)复合材料的光电性质,当ZnCl_(2)和NH_(2)-MIL-125(Ti)掺杂质量比为1∶6时,在催化剂质量浓度为0.4 g/L、pH=2、甲醇添加量为0.5 mL条件下,复合材料紫外光催化还原Cr(Ⅵ)的效率最高可达95%,循环使用5次后还原效率为75%。
Emulsion interfacial method for preparing photocatalytic composites has remarkable advantages in enhancing photocatalytic activity.The ZnCl_(2)/NH_(2)-MIL-125(Ti)composites were synthesized by emulsion interface method,which were characterized by X-ray powder diffraction,fourier transform infrared spectroscopy,scanning electron microscope,X-ray photoelectron spectroscopy,specific surface area and pore analysis and ultraviolet-visible diffuse reflection spectrum.The photocatalytic reduction of Cr(Ⅵ)by the composites was investigated,and the photocatalytic reaction mechanism and the reuse of the catalyst were discussed.The results show that the emulsion interfacial method will significantly affect the photoelectric properties of ZnCl_(2)/NH_(2)-MIL-125(Ti).When the doping mass ratio of ZnCl_(2) to NH_(2)-MIL-125(Ti)is 1∶6,the mass concentration of catalyst is 0.4 g/L,pH=2 and methanol is added to 0.5 mL,the efficiency of UV catalytic reduction of Cr(Ⅵ)of the composites is up to 95%,and the reduction efficiency is 75% after recycling for 5 times.
作者
陈志月
杨启鹏
郭恒
谭伟强
关静
CHEN Zhiyue;YANG Qipeng;GUO Heng;TAN Weiqiang;GUAN Jing(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China)
出处
《青岛理工大学学报》
CAS
2024年第5期94-103,共10页
Journal of Qingdao University of Technology
基金
山东省自然科学基金资助项目(ZR2021MB104)
中山大学聚合物复合材料及功能材料教育部重点实验室开放课题(PCFM-2021A06)。
