摘要
合成了一个新的光敏配合物[Ru(bpy)2L](PF6)2(RHIPB,L=2-羟-4-(1-氢咪唑并[4,5-f]1,10-邻菲罗啉)基苯甲酸),通过IR、MS、UV-Vis、SEM、XRD、CV等手段对目标化合物的结构和性质进行了表征。以RHIPB为光敏剂,制备了光催化剂6%RHIPB/0.5%Pt/TiO2(质量分数)(Ⅰ),系统考察并优化了目标光化剂的光催化分解水产氢性能。实验结果表明:在100mL含50mg复合光催化剂6%RHIPB/0.5%Pt/TiO2的水中,当牺牲剂TEOA浓度为5%(体积比),pH=5时,在可见光照射下,催化剂可持续产氢3h,平均产氢速率2578μmol·h-1·g-1。机理研究表明激发态的光敏剂分子RHIPB*可以将电子注入TiO2的导带,从而激发催化反应。
A new photosensitive complex [Ru（bpy）zL] （PF6）z （RHIPB, L=2-hydroxy- 4-（1H-imidazo [-4,5- f][-1,10] phenanthrolin-2-yl） benzoic acid） had been synthesized, then the structure and property of RHIPB was cha- racterized by IR, MS, UV-Vis, SEM, XRD and CV. The title photocatalyst 6wt%RHIPB/0. 5wt%Pt/TiO2 （ I ） was prepared by sensitization of Pt/TiOz with complex RHIPB. The hydrogen production activity of I was further eva- luated under visible light. The maximum hydrogen yield of 386. 8 μmol in 3 h and hydrogen production rate of 2578. 7 μmo1 . h-1 . g-1 was observed under the optimal conditions with pH=5,50 mg photocatalyst I and 5% sacrificial reagent TEOA （V ： V） under visible light driven. Mechanistic studies suggested that the excited state of the photo- sensitizer molecules RHIPB＂ could inject electrons into the conduction band of TiOz, which stimulated the catalytic reaction.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第18期18-23,共6页
Materials Reports
基金
国家自然科学基金(21171147)
河南省科技计划项目(142102310258)
关键词
合成
光催化
产氢
机理
synthesis, photocatalytic, hydrogen production, mechanism
