摘要
The use of linear amphiphilic block copolymers as templates is an important method for the preparation of mesoporous materials.However,the obtained assemblies are usually sensitive to synthetic conditions,which impedes the preparation of such mesoporous materials in certain environments.Herein,we report a universal strategy applying an amphiphilic multiarm triblock copolymer in the preparation of mesoporous metal oxide nanofibers(NFs)using one metal oxide(TiO_(2),ZrO_(2),WO_(3),CeO_(2)),or two(TiO_(2)/WO 3,TiO_(2)/ZrO_(2),TiO_(2)/CeO_(2))and three(TiO_(2)/WO_(3)/CuO)metal oxides as composites.The template consists of modified β-cyclodextrin as the center of the macromolecule which is attached sequentially to a block of polystyrene,poly(acrylic acid),and poly(ethylene oxide).Under electrospinning conditions,stable unimolecular micelles are formed and effectively co-assemble with metal ions to form fibrous nanostructures.As indicated by various characterization methods,the synthesized TiO_(2) and its derived composite NFs maintain a straight and continuous fibrous structure after calcination,and TiO_(2) NFs exhibit uniform mesopores of 10.8 nm in diameter and a large Brunauer-Emmett-Teller surface area of 143.3 m^(2)g^(−1).Benefiting from the characteristic structure,still present after modification,Pt-decorated mesoporous TiO_(2) NFs display excellent ability in the visible-light photocatalytic degradation of tetracycline,which is superior to the commercial P25 catalyst.This study reveals a promising strategy for the preparation of fibrous mesoporous metal oxides.
基金
funded by the National Natural Science Foundation of China(Grants No.51822202,52173233 and 51772050)
Innovation Program of Shanghai Municipal Education Commission(Grant No.2021-01-07-00-03-E00109)
Science and Technology Commission of Shanghai Municipality(Grant No.19520713200)
Shanghai Scientific and Technological Innovation Project(Grant No.19JC1410400)
“Shuguang Program”supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(Grant No.20SG33)
Key Basic Research Program of Science and Technology Com-mission of Shanghai Municipality(Grant No.20JC1415300)
DHU Distinguished Young Professor Program and Fundamental Research Funds for the Central Universities
the Fundamental Research Funds for the Central Universities(Grant No.2232020D-02)
Shanghai Sailing program(Grant No.20YF1400500)
Shanghai Natural Science Foundation(Grant No.20ZR1401500)
the Opening Project of Key Laboratory of Inorganic Functional Materials and Devices,Chinese Academy of Sciences(KLIFMD202104).
