溶剂和微波辅助对NH_(2)-MIL-125-Ti制备及其光催化性能的影响  

Effects of Solvent and Microwave Assistance on Synthesis of NH_(2)-MIL-125-Ti and Its Photocatalytic Performance

作　　者：谭玉简 刘民[1] 郭新闻[1] 胡深 TAN Yujian;LIU Min;GUO Xinwen;HU Shen(Department of Catalytic Chemistry and Engineering,School of Chemical Engineering,Faculty of Chemical Environmental and Biological Science and Technology,State Key Laboratory of Fine Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学精细化工国家重点实验室化工与环境生命学部化工学院催化化学与工程系,辽宁大连116024

出　　处：《石油学报（石油加工）》2021年第4期744-756,共13页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金重点项目(21236008);国家留学基金(留金欧(2019)157)资助

摘　　要：通过改变N,N-二甲基甲酰胺(DMF)-甲醇混合溶剂中DMF和甲醇的体积比,分别采用溶剂热合成法和微波辅助溶剂热法合成了晶粒尺寸在300~1100 nm之间的NH_(2)-MIL-125-Ti催化剂。采用SEM、XRD、TGA、N_(2)物理吸附、UV-vis等手段对所得样品进行表征,并将合成的样品用于罗丹明B光催化降解反应。结果表明:随着混合溶剂中甲醇体积分数的增加,NH_(2)-MIL-125-Ti由圆片状逐渐转变为方片状;光反应开始后80 min时罗丹明B移除率可达90%以上;微波辅助可以提高NH_(2)-MIL-125-Ti样品的Ti含量,从而提高其光催化性能。Through changing volume ratios of DMF/methanol in the DMF-methanol mixed solvent,NH_(2)-MIL-125-Ti with size of 300 to 1100 nm was synthesized with solvothermal and microwave assisted method.The synthesized products were further characterized with SEM,XRD,TGA,N 2 physical adsorption as well as UV-vis.They were also applied in the RhB photocatalytic degradation reaction.Experimental results indicated that the morphology of NH_(2)-MIL-125-Ti could change from circular flake to square flake with the increase of methanol volume fraction in the mixed solvent;RhB could be degraded more than 90%in 80 min after photocatalytic reaction started.It was also found that microwave assisted method can increase Ti content in the synthesized products,and thus improve their photocatalytic performance.

关 键 词：NH_(2)-MIL-125-Ti 溶剂比 形貌调控 微波辅助合成 

分 类 号：O643[理学—物理化学]