稀土-Fe_(3)O_(4)-CD复合材料制备及降解阳离子染料的性能研究  

Preparation of rare earth-Fe_(3)O_(4)-CD composites and their performances in cationic dyes degradation

作　　者：王昕怡 汤登科 章耀鹏 沈忱思[1] 马春燕[1] WANG Xin-yi;TANG Deng-ke;ZHANG Yao-peng;SHEN Chen-si;MA Chun-yan(College of Environmental Science Engineering,Donghua University,Shanghai 201600,China)

机构地区：[1]东华大学环境科学与工程学院,上海201600

出　　处：《化学研究与应用》2021年第8期1595-1601,共7页Chemical Research and Application

基　　金：中央高校基本科研业务费专项资金(2232021G-04)资助。

摘　　要：本文以β-环糊精(CD)为载体,通过负载Fe_(3)O_(4)和稀土镧(La)或铈(Ce),制备了可有效降解有机物的催化复合材料La-Fe_(3)O_(4)-CD和Ce-Fe_(3)O_(4)-CD。利用X射线光电子能谱分析及扫描电子显微镜对样品的结构与形貌进行表征,并以染料阳离子蓝X-GRL 300%为目标污染物,评价两种催化剂的催化降解性能。结果表明,当合成时间为6h、合成温度为160℃、Fe_(3)O_(4)与硝酸镧质量比为3∶1时,合成的La-Fe_(3)O_(4)-CD对于染料的催化降解效果最佳,其降解率可以达到98%;当合成时间为3h、合成温度为140℃、Fe_(3)O_(4)与硝酸铈质量比为3∶1时,合成的Ce-Fe_(3)O_(4)-CD对于染料的催化降解效果最佳,其降解率可以达到99%。In this paper, β -cyclodextrin(CD)was used as a carrier,and Fe_(3)O_(4) and rare earth lanthanum(La)or cerium(Ce)were loaded to prepare catalytic composite materials La-Fe_(3)O_(4)-CD and Ce-Fe_(3)O_(4)-CD that could effectively degrade organics.The structure and performance of composites were characterized by X-ray photoelectron spectroscopy and Scanning electron microscope.Cationic blue X-GRL 300%was used as the target material to evaluate the degradation performance.The results showed that when the reaction time was 6h,the temperature was 160°C and the mass ratio of Fe_(3)O_(4) to La(NO 3) 3·6H 2O was 3∶1,the catalytic effect of La-Fe_(3)O_(4)-CD was the best,and the degradation rate could reach 98%.The optimal preparation conditions of the Ce-Fe_(3)O_(4)-CD were obtained at 3h,140°C and the mass ratio of 3∶1 with the best degradation rate of dye up to 99%.

关 键 词：稀土 水热法 阳离子蓝 催化降解 

分 类 号：O614.8[理学—无机化学]