大尺寸多级孔g-C_(3)N_(4)/MHPTS催化剂的制备及其性能研究  

Preparation and properties of macro-sized hierarchical porous g-C_(3)N_(4)/MHPTS catalyst

作　　者：舒婷 王明辉 胡俊 葛鑫峰 梁云霄[1] SHU Ting;WANG Minghui;HU Jun;GE Xinfeng;LIANG Yunxiao(School of Material Science and Chemical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2023年第2期95-101,共7页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：浙江省公益项目(LGG19E020002)。

摘　　要：研发高效、易回收的催化剂具有很高的实际应用价值.采用多模板法制备了一种新型的大尺寸多级孔钛硅酸盐(MHPTS),并以其为载体,采用简单的浸渍-热聚合法制备了g-C_(3)N_(4)/MHPTS复合催化剂.MHPTS具有连续贯通的大孔结构,传质速度快;几十纳米的超薄壁厚意味着大孔孔壁上的介孔孔道非常短,缩短了反应物和产物分子进出孔道的时间;微孔提供了大量的活性位点.在热反应条件下,MHPTS对环己烯的催化环氧化转化效率远高于常规的TS-1分子筛.此外,由于g-C_(3)N_(4)的负载使g-C_(3)N_(4)/MHPTS对光的吸收范围延伸至可见光,提高了催化剂的光吸收能力.结果表明,在光热协同作用下,g-C_(3)N_(4)/MHPTS对环己烯的催化环氧化转化效率进一步提高.Developing highly efficient and easily recyclable catalysts is massively desirable for applications.A novel macro-sized hierarchical porous titanasilicate(MHPTS)is prepared using multi-template method.g-C_(3)N_(4)/MHPTS is prepared through simple impregnation-thermal polymerization with MHPTS as the carrier.MHPTS has 3D continuous pass-through macropore channels,which ensures fast mass transfer;the ultra-thin wall thickness of tens of nanometers suggests that the mesoporous channels on the macropore wall are significantly short in length,which saves the diffusion time of reactant and product molecules in the pore channel.The micropores provide abundant active sites.Under thermal reaction conditions,the catalytic conversion efficiency of MHPTS to cyclohexene epoxidation reaction is higher than that of conventional TS-1 molecular sieve.The loading of g-C_(3)N_(4)extends the absorption range of the catalyst to visible range and facilitates the light absorption capacity of g-C_(3)N_(4)/MHPTS.The results indicate that the conversion of cyclohexene has reached a higher level under the photo-thermal synergy.

关 键 词：大尺寸 多级孔 光热催化 环己烯 环氧环己烷 

分 类 号：TB34[一般工业技术—材料科学与工程]