MIL-125(Ti/Cu)有机框架的制备及其光催化还原CO2的性能
Preparation of MIL-125(Ti/Cu)organic frameworks and its performance of photocatalytic reduction CO2
宋微娜 1穆美 1林俊康 1邓忠员 1刘亚敏1
作者信息
- 1. 黑龙江科技大学 环境与化工学院,哈尔滨 150022
- 折叠
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、N2 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CO2 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CO2 进行5 h,CO和CH4 的产量比MIL-125(Ti)增加一倍,分别为51.2 和58.7 μmol/g,光催化氧化还原过程中·OH和·O-2 是主要的活性物种.
Abstract
This paper seeks to improve environmental pollution,reduce carbon emissions,and miti-gate the greenhouse effect.The study involves designing and synthesizing a series of MIL-125(Ti/Cu)bi-metallic organic framework catalysts;analyzing the structures of the samples by XRD,SEM,N2 adsorp-tion-desorption,FT-IR and TGA;and studying the performance of the photocatalytic reduction of CO2.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 com-posite material move to the visible light region,which increases the electron transfer efficiency of the sam-ple.The photocatalytic reduction of CO2 of 0.5-MCu sample lasts 5h.Compared with MIL-125(Ti),the yields of CO and CH4 can be doubled by 51.2 and 58.7 μmol/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CO2Key words
Ti/Cu bimetal/MIL-125/metal organic frameworks/photocatalytic reduction of CO2引用本文复制引用
基金项目
黑龙江省自然科学基金项目(LH2022F051)
出版年
2024
国家科技期刊平台
NSTL
万方数据