通过瓶中造船法制备TiBMMs双模型介孔催化剂及其对环己烯环氧化反应性能的影响.pdf

Epoxidation Performances ofCyclohexene over Ti/BMMs Bimodal Mesoporous CatalystsPrepared Using a Ship·-in··a--bottle Method 通过瓶中造船法制备Ti/BMMs双模型介孔催化剂及其对环己烯环氧化反应性能的影响 BAI Shi—yang,HU Xin—tao,SunJi—hong+,REN Bo (College ofEnvironmental&Energy University ofTechnology, Beijing 100124,,China) 白诗杨,胡新涛,孙继红’,任博(北京工业大学环境与能源工程学院化学化工系,北京100124) Abstraet:Ti/BMMs catalysts were prepared viaself-assemble bined withship..in..bottle differentmethods were carried out toinvestigate theeffectsofadding ionicliquid and triethanolamine or triethylamine on thecoordination environment oftheTispecies and catalytic performances inepoxidation ofcyclohexene were resultsshowed thatthebimodal mesoporous structures ofTi/BMMs could bepreserved aftergrafted Tispecies viafourpreparation methods;the presence of『spmim][Cl-1 andtriethanolamine ortriethylamine could notonly prevent Ti speciesexisting inmesoporous surface from aggregation,but alsobenefit forloaded Titetrahedral coordination with ahighdispersion. Key words:bimodal mesoporous silicas;ionicliquid;Ti/BMMs:epoxidation ofcyclohexene 摘要:通过自组装技术路线并结合瓶中造船法,提出四种方法制备出具有双模型介孔结构的 Ti/BMMs催化剂,详细考察了离子液添加量和三乙胺或三乙醇胺对Ti的配位化学环境的作用机制,及其对环己烯环氧化反应性能的影响。结果表明离子液和三乙胺或三乙醇胺不仅起到阻止 Ti活性物种在介孔表面的团聚,而且有利于四配位Ti在介孔结构中保持高分散性能。主题词:介孔二氧化硅;,离子液:Ti/BMMs;环己烯环氧化 1 Introduction received great attentiondue totheir