单模聚焦微波法制备MIL-53(Fe)及其光催化性能研究  

Preparation and Photocatalytic Performance of MIL-53(Fe)by Single-Mode Focused Microwave

作　　者：齐永娟 宫晓杰[1,2] 张丹[1] 吴限[1] 李丽华[1] Qi Yongjuan;Gong Xiaojie;Zhang Dan;Wu Xian;Li Lihua(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;School of Materials&Metallurgy,Northeastem University,Shenyang Liaoning 110004,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《石油化工高等学校学报》2021年第5期24-29,共6页Journal of Petrochemical Universities

基　　金：辽宁省教育厅高校科研基金(L2020039)。

摘　　要：采用单模聚焦微波合成系统快速合成金属有机骨架光催化剂MIL-53(Fe)。选用十六烷基三甲基溴化铵(CTAB)作为添加剂,考察了CTAB的添加对MIL-53(Fe)晶相结构、形貌尺寸的影响,以及微波合成条件对MIL-53(Fe)催化性能的影响。以10 mg/L的罗丹明B为模拟降解物,比较了CTAB添加量对光催化效果的影响。结果表明,CTAB的添加使得MIL-53(Fe)晶体颗粒尺寸缩小,形态更加规整,且当微波反应功率为75 W,温度为100℃,反应时间为1 h,n(FeCl_(3)·6H_(2)O)/n(CTAB)=1∶0.5,催化剂质量浓度为0.2 g/L,在300 W钨灯照射100 min时对罗丹明B的降解率可达90%以上。通过自由基捕获实验可知,空穴和·OH是光催化过程中的主要贡献者。A single-mode focused microwave synthesis system was used to rapidly synthesize MIL-53(Fe).The effect of reaction additive hexadecyl trimethyl ammonium bromide(CTAB)on the crystal structure,morphology,and particle size of MIL-53(Fe),as well as the microwave synthesis conditions on catalytic performance of MIL-53(Fe)were investigated using 10 mg/L Rhodamine B as a target contaminant.The results show that the addition of CTAB reduces the size of MIL-53(Fe)and makes the shape more regular.When the microwave power is 75 W,the temperature is 100℃,the synthesis time is 1 h,n(FeCl_(3)·6H_(2)O)/n(CTAB)=1∶0.5,the catalyst dosage is 0.2 g/L,the degradation rate of Rhodamine B can be more than 90%in 100 minutes under the radiation of 300 W tungsten lamp.It was known from free radical capture experiments that holes and·OH were the main active species in the photocatalytic process.

关 键 词：微波合成 金属有机骨架材料 表面活性剂 光催化 

分 类 号：TQ034[化学工程] O644.1[理学—物理化学]