MCM-41/NH2-MIL-101(Fe)复合材料的制备及其光催化还原Co2性能
Preparation of MCM-41/NH2-MIL-101(Fe)composite and its activity for photocatalytic reduction of CO2
江雨婷 1徐红 1钟毅 1毛志平 1张琳萍1
作者信息
- 1. 生态纺织教育部重点实验室,东华大学化学与化工学院,上海 201620
- 折叠
摘要
采用水热法将分子筛MCM-41与光催化剂NH2-MIL-101(Fe)复合制备了 MCM-41/NH2-MIL-101(Fe)复合光催化剂(NMM),用于光催化还原CO2.借助XRD、BET、SEM-EDS、UV-Vis DRS、PL、XPS等分析手段对催化剂的微观结构进行详细的分析和表征,解析了催化剂理化性质对催化活性的影响,明确了在NH2-MIL-101(Fe)催化剂中掺杂MCM-41对CO2还原为甲酸产量提升有积极作用.实验结果表明,在光照5 h后,在水溶液中未添加牺牲剂的条件下,10％MCM-41添加量的10％NMM将CO2还原为甲酸的产量为109.11 μmol/g,是纯NH2-MIL-101(Fe)的5倍(21.78 μmol/g);添加牺牲剂TEOA后10％NMM的甲酸产量为132.78 µmol/g,是纯NH2-MIL-101(Fe)的4倍(33.67 μmol/g).催化剂在2种溶液体系中重复使用3次后,仍保持很高的催化活性.
Abstract
MCM-41 molecular sieve is mixed with NH2-MIL-101(Fe),a MOF photocatalyst,to prepare MCM-41/NH2-MIL-101(Fe)(NMM)composite photocatalyst through a hydrothermal method,which is used for photocatalytic reduction of CO2.The microstructure of the prepared composite photocatalyst is characterized by means of XRD,BET,SEM-EDS,UV-Vis DRS,PL,XPS and other analytical tools,the influence of the physicochemical properties of the catalyst on the catalytic activity is resolved.The doping of MCM-41 on NH2-MIL-101(Fe)leads to a positive effect on the enhancement of CO2 reduction to HCOOH.Experimental results show that HCOOH yield reaches 109.11 μmol·g-1 after 5 h of light exposure over 10％-NMM catalyst in water solution without sacrificial agent added,which is around five times that over pure NH2-MIL-101(Fe).HCOOH yield over 10％-NMM with TEOA as sacrificial agent reaches 132.78μmol·g-1,which is 4 times that(33.67 μmol·g-1)over pure NH2-MIL-101(Fe).The prepared photocatalyst remains high catalytic activity after it has been used for 3 times recycle in both solvent systems.
关键词
MCM-41/NH2-MIL-101(Fe)/光催化还原/CO2/甲酸Key words
MCM-41/NH2-MIL-101(Fe)/photocatalytic reduction/CO2/HCOOH引用本文复制引用
出版年
2024
NETL
NSTL
万方数据