MIL-125(Ti/Cu)有机框架的制备及其光催化还原CO_(2)的性能  

Preparation of MIL-125(Ti/Cu)organic frameworks and its performance of photocatalytic reduction CO_(2)

作　　者：宋微娜 穆美 林俊康 邓忠员 刘亚敏 Song Weina;Mu Mei;Lin Junkang;Deng Zhongyuan;Liu Yamin(School of Environment&Chemical Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2024年第4期557-563,577,共8页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省自然科学基金项目(LH2022F051)。

摘　　要：为改善环境污染、降低碳排放和缓解温室效应,设计合成了系列MIL-125(Ti/Cu)双金属有机框架催化剂,通过XRD、SEM、N_(2)吸附/脱附、FT-IR和TGA对样品进行了结构分析,研究了复合材料光催化还原CO_(2)性质。结果表明:助催化剂Cu掺杂可以获得结构稳定的Ti/Cu双金属MIL-125型金属有机框架材料,样品具有MOFs材料典型的大比表面积和多孔结构;Cu掺杂使复合材料分子吸收光谱向可见光区移动,增加了样品的电子转移效率;0.5-MCu样品光催化还原CO_(2)进行5 h,CO和CH 4的产量比MIL-125(Ti)增加一倍,分别为51.2和58.7μmol/g,光催化氧化还原过程中·OH和·O^(-)_(2)是主要的活性物种。This paper seeks to improve environmental pollution,reduce carbon emissions,and mitigate the greenhouse effect.The study involves designing and synthesizing a series of MIL-125(Ti/Cu)bimetallic organic framework catalysts;analyzing the structures of the samples by XRD,SEM,N_(2)adsorption-desorption,FT-IR and TGA;and studying the performance of the photocatalytic reduction of CO_(2).The results show that Ti/Cu bimetallic MIL-125 metal-organic framework materials with stable structure can be fabricated by doping the promoter Cu,and the samples possess typical large specific surface area and porous structure of MOFs materials;doping Cu makes the molecular absorption spectrum of the composite material move to the visible light region,which increases the electron transfer efficiency of the sample.The photocatalytic reduction of CO_(2)of 0.5-MCu sample lasts 5h.Compared with MIL-125(Ti),the yields of CO and CH 4 can be doubled by 51.2 and 58.7μmol/g,respectively.·OH and·O^(-)_(2) are the main active species in the process of photocatalytic redox.

关 键 词：Ti/Cu双金属 MIL-125 金属有机框架 光催化还原CO_(2) 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]