一步法制备Fe掺杂ZnWO_(4)光催化剂及其固氮性能  

One-step fabrication of Fe-doping ZnWO_(4)photocatalyst and its nitrogen fixation performance

作　　者：程小会 董晓丽 郑楠 王宇 Xiaohui;DONG Xiaoli;ZHENG Nan;WANG Yu(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2025年第2期115-119,共5页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金项目(21878031)。

摘　　要：采用一步溶剂热法合成了具有花球结构的Fe掺杂ZnWO_(4)(Fe-ZWO)光催化剂。通过XRD、SEM、DRS和电化学等测试方法对催化剂进行表征,在实验过程中通入氮气利用纳氏比色法研究了FeZnWO_(4)样品的光催化活性。实验结果表明,Fe离子掺杂缩小了ZnWO_(4)的带隙,提高了其光生载流子的分离效率,使光催化剂固氮性能有效提升。掺入的Fe离子与ZnWO_(4)摩尔比为0.05∶1时得到的5%Fe-ZnWO_(4)样品具有最高的光催化固氮活性,光照2h后固氮速率达到140.91μmol/(g·h),是ZnWO_(4)的8.9倍。3次循环实验后5%Fe-ZnWO_(4)样品仍具有较好的光催化固氮活性。Fe-doped ZnWO_(4)(Fe-ZWO)photocatalysts with flower ball structure were synthesized by one-step solvothermal method.The catalysts were characterized by XRD,SEM,DRS and electrochemistry.The photocatalytic activity of Fe-ZnWO_(4)samples was determined by Nessler’s reagent method with aerating nitrogen gas during the experiment.The results showed that the band gap of ZnWO_(4)was narrowed,the separation efficiency of its photogenerated carriers was improved and the nitrogen fixation performance of the photocatalyst was effectively enhanced doping with Fe ions.5%Fe-ZnWO_(4)sample obtained the highest photocatalytic nitrogen fixation activity with the molar ratio of doped Fe ions to ZnWO_(4)of 0.05∶1.The rate of nitrogen fixation could reach 140.91μmol/(g·h)after 2 h of light irradiation,which was 8.9 times higher than that of ZnWO_(4).After three cyclic tests,the 5%Fe-ZnWO_(4)sample remain good photocatalytic nitrogen fixation activity.

关 键 词：钨酸锌 溶济热法 光催化 固氮 

分 类 号：X703.5[环境科学与工程—环境工程]