The recycling technology of photocatalyst powdery has hardly been mature in the photocatalytic ox-idation so far.In this work,the hollow TiO2 microspheres with an appropriate thickness are con-fined in carbon microspheres(CMSs)to form hollow TiO2@CMSs,which are physically integrated with carbon-fiber textile by van der Waals(vdW)interactions to generate separable and recyclable hollow TiO2@CMSs/carbon-fiber vdW heterostructures.Such separable and recyclable heterostructures show re-markable oxidation of 2,4-dinitrophenol.From our detailed characterization and density functional theory(DFT)calculations,we found that carbon fiber can trap electrons exerted from the excitation of hollow TiO2@CMSs and creates holes in hollow TiO2 microspheres,which endow the carbon fiber with pho-tocatalytic activity through coherent charge injection.This study indicates that our general strategy for the fabrication of hollow TiO2@CMSs/carbon-fiber vdW heterostructures can be used as separable and recyclable photocatalyst and photoelectrocatalyst with potential industrial applications in environment-related fields.

School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science and Technology,Xi'an 710021,China;School of Environment and Chemistry,Luoyang Institute of Science and Technology,Luoyang 471000,China;Centre for Future Materials,University of Southern Queensland,Springfield Central,QLD 4300,Australia;School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,QLD 4072,Australia

[1]Hua-Jun Chen;Yan-Ling Yang;Xin-Xin Zou;Xiao-Lei Shi;Zhi-Gang Chen-.Flexible hollow TiO2@CMS/carbon-fiber van der Waals heterostructures for simulated-solar light photocatalysis and photoelectrocatalysis)[J].材料科学技术（英文版）,2022(03):143-150

dinitrophenol,photoelectrocatalyst

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