HPW@UiO-66(Ce)复合材料的制备及可见光催化降解四环素  

Preparation of HPW@UiO-66(Ce)composites and visible light catalytic degradation of tetracycline

作　　者：王寒蕊 李春光[1] 杜晨阳 王强[1] 王聪[1] 柳雨晴 WANG Hanrui;LI Chunguang;DU Chenyang;WANG Qiang;WANG Cong;LIU Yuqing(Key Laboratory of Environmental Functional Materials,School of Civil Engineering and Environment,Zhengzhou University of Aeronautics,Zhengzhou 450046,Henan,China)

机构地区：[1]郑州航空工业管理学院土木与环境学院郑州市环境功能材料重点实验室,河南郑州450046

出　　处：《精细化工》2025年第2期411-419,448,共10页Fine Chemicals

基　　金：国家自然科学基金项目(21771165);河南省科技攻关项目(222102310285);河南省自然科学基金项目(222300420577)。

摘　　要：利用水热合成法将磷钨酸(HPW)负载在铈基金属有机骨架材料〔UiO-66(Ce)〕上,制备了HPW@UiO-66(Ce)复合材料。采用SEM、XRD、FTIR、BET、UV-Vis DRS、XPS对HPW@UiO-66(Ce)进行了表征。考察了HPW@UiO-66(Ce)可见光催化降解四环素(TC)的性能,探讨了其光催化降解机理。结果表明,HPW@UiO-66(Ce)拓宽了UiO-66(Ce)可见光吸收范围,从470 nm增至500 nm;HPW的负载降低了UiO-66(Ce)的比表面积,但对其孔径没有影响。由m(H_(3)PO_(4)•12WO_(3)•xH_(2)O)∶m〔UiO-66(Ce)〕=7∶5〔UiO-66(Ce)0.5 g〕制备的HPW@UiO-66(Ce)-0.7具有最佳的光催化降解TC性能,在可见光照90 min、投加量〔HPW@UiO-66(Ce)-0.7质量与TC溶液体积之比,下同〕为0.50 g/L时,对质量浓度60 mg/L、pH=7的TC降解率可达到96.4%。羟基自由基、空穴是HPW@UiO-66(Ce)-0.7光催化降解TC过程中主要活性物种,超氧自由基也参与此过程。Composites HPW@UiO-66(Ce)was synthesized via hydrothermal synthesis method by loading phosphotungstic acid(HPW)onto cerium-based metal organic framework material[UiO-66(Ce)],and characterized by SEM,XRD,FTIR,BET,UV-Vis DRS,XPS.The catalytic performance of HPW@UiO-66(Ce)for tetracycline(TC)degradation under visible light was evaluated,with the photocatalytic mechanism explored.The results showed that the HPW@UiO-66(Ce)broadened the visible light absorption range of UiO-66(Ce)from 470 nm to 500 nm,and reduced the specific surface area of UiO-66(Ce)without changing its pore sizes.HPW@UiO-66(Ce)-0.7 prepared with m(H_(3)PO_(4)•12WO_(3)•xH_(2)O)∶m[UiO-66(Ce)]=7∶5[UiO-66(Ce)0.5 g]exhibited the best photocatalytic performance on TC degradation,with the degradation rate of TC with a mass concentration of 60 mg/L reaching 96.4%when the HPW@UiO-66(Ce)dosage[the ratio of HPW@UiO-66(Ce)-0.7 mass to TC solution volume,the same below]was 0.50 g/L under visible light for 90 min at pH=7.Hydroxyl radicals and holes were the main active species in HPW@UiO-66(Ce)-0.7 photocatalytic degradation of TC,while superoxide radicals also participated in this process.

关 键 词：磷钨酸 UiO-66(Ce) 四环素 光催化剂 降解 水处理技术 

分 类 号：X703[环境科学与工程—环境工程]