摘要
采用水热法将分子筛MCM-41与光催化剂NH_(2)-MIL-101(Fe)复合制备了MCM-41/NH_(2)-MIL-101(Fe)复合光催化剂(NMM),用于光催化还原CO_(2)。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NH_(2)-MIL-101(Fe)催化剂中掺杂MCM-41对CO_(2)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CO_(2)还原为甲酸的产量为109.11μmol/g,是纯NH_(2)-MIL-101(Fe)的5倍(21.78μmol/g);添加牺牲剂TEOA后10%NMM的甲酸产量为132.78μmol/g,是纯NH_(2)-MIL-101(Fe)的4倍(33.67μmol/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。
MCM-41 molecular sieve is mixed with NH_(2)-MIL-101(Fe),a MOF photocatalyst,to prepare MCM-41/NH_(2)-MIL-101(Fe)(NMM)composite photocatalyst through a hydrothermal method,which is used for photocatalytic reduction of CO_(2).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 NH_(2)-MIL-101(Fe)leads to a positive effect on the enhancement of CO_(2)reduction to HCOOH.Experimental results show that HCOOH yield reaches 109.11μmol·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 NH_(2)-MIL-101(Fe).HCOOH yield over 10%-NMM with TEOA as sacrificial agent reaches 132.78μmol·g^(-1),which is 4 times that(33.67μmol·g-1)over pure NH_(2)-MIL-101(Fe).The prepared photocatalyst remains high catalytic activity after it has been used for 3 times recycle in both solvent systems.
作者
江雨婷
徐红
钟毅
毛志平
张琳萍
JIANG Yu-ting;XU Hong;ZHONG Yi;MAO Zhi-ping;ZHANG Lin-ping(Key Laboratory of Eco-Textiles of the Ministry of Education,College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China)
出处
《现代化工》
CAS
CSCD
北大核心
2024年第S02期155-160,共6页
Modern Chemical Industry
基金
国家自然科学基金项目(21872025)。
