血晶素负载TiO2光催化还原CO2的研究

摘要

光催化还原CO2是时下研究的热点课题.建立了一个相对高效、稳定的非均相光催化还原CO2体系.将血晶素作为助催化剂负载于TiO2的表面,对比了负载前后TiO2的晶形变化和血晶素负载量对还原效果的影响,选择合适的溶剂,优化了该体系最佳反应条件.[Ru(bpy)3]2+作为光敏剂,BIH、TEOA作为牺牲剂,在乙腈溶液中光催化还原CO2,体系最高TONCO可达832.%The photocatalytic reduction of CO2is a hot topic of current researches.A relatively efficient and stable heterogeneous photocatalytic CO2reduction system was established. The hemin as cocatalyst was supported on the surface of TiO2. The change of crystal form of TiO2before and after the loading was compared, and the effect of hemin loading on the reduction was investigated, appropriate solvent was selected, the reaction conditions of the system were optimized. The results showed that, when [Ru(bpy)3]2+was used as photosensitizer, BIH and TEOA were used as sacrificial agent, photocatalytic reduction of CO2was realized in the acetonitrile solution, TONCOof the system was up to 832.