Porous g-C_(3)N_(4)-encapsulated TiO_(2) hollow sphere as a high-performance Z-scheme hybrid for solar-induced photocatalytic abatement of environmentally toxic pharmaceuticals  

作　　者：Dong-Eun Lee Satyanarayana Moru Wan-Kuen Jo Surendar Tonda 

机构地区：[1]School of Architecture,Civil,Environmental and Energy Engineering,Kyungpook National University,80 Daehak-ro,Buk-gu,Daegu,41566,Republic of Korea [2]Department of Electrical and Computer Engineering,Iowa State University,Coover Hall,Osborn Drive,Ames,Iowa 50011,USA [3]Department of Physical Sciences,Kakatiya Institute of Technology and Science,Warangal,506015,Telangana,India

出　　处：《Journal of Materials Science & Technology》2021年第23期21-32,共12页材料科学技术（英文版）

基　　金：supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.NRF-2018R1A5A1025137)。

摘　　要：Herein,we rationally constructed a hybrid heterostructure comprising porous g-C_(3)N_(4)(CN)-encapsulated anatase TiO_(2) hollow spheres(TOHS)via a synthesis method that involves hydrothermal and calcination treatments.The fabricated hybrid,termed CN/TOHS,demonstrated extraordinary activity toward the degradation of environmentally toxic pharmaceutical substances(acetaminophen and ciprofloxacin)in aqueous solutions under simulated sunlight irradiation;the activity of CN/TOHS was superior to that attained for individual TOHS and CN counterparts.In particular,the CN/TOHS hybrid containing 13.3 wt.%of CN on TOHS displayed the optimum degradation activity among the tested catalysts used in this study,and it also possessed exceptional recyclability and stability during consecutive degradation tests.The remarkable photocatalytic activity and stability of the hybrid were predominantly ascribed to the large solid interfacial contact between constituents,TOHS and CN,induced by effective hybrid structure,which boosted the interfacial charge transfer and impeded with the direct recombination of photo-induced charges.Notably,the results of the liquid chromatography-mass spectrometry analysis corroborated the effective mineralization of model pharmaceutical pollutants in the presence of the CN/TOHS hybrid.The simple interfacial engineering strategy presented in this study offers a potential route for the rational design of novel catalysts for application in environmental remediation and solar energy conversion.

关 键 词：TiO_(2)hollow sphere g-C3N4 Hybrid heterostructure Z-scheme charge transfer Pollutant degradation 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程]