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《Chinese Science Bulletin》 2015-33
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In situ immobilization of g-C_3N_4 on structured ceramic foam and visible light photocatalytic air purification

CUI Wen;LI Hui;SUN YanJuan;DONG Fan;HO Wing-Kei;WU ZhongBiao;Chongqing Key Laboratory of Catalysis and Functional Organic Molecules,College of Environment and Resources,Chongqing Technology and Business University;Department of Science and Environmental Studies,The Hong Kong Institute of Education;Department of Environmental Engineering,Key Laboratory of Polluted Environment Remediation and Ecological Health of Ministry of Education,Zhejiang University;  
g-C3N4 is a metal-free visible light photocatalyst with wide promising application.In this work,an in situ approach of dissolutionrecrystallization-thermal-treatment is developed for effective immobilization of g-C3N4 on the support using dicyandiamide as precursor.The immobilized g-C3N4 on Al2O3 ceramic foam was firm enough owing to the special physicochemical interaction between g-C3N4 and Al2O3.The g-C3N4 samples were analyzed by techniques.With a systematic investigation on the effects of different pyrolysis time on the microstructure and photocatalytic activity of g-C3N4,it was found that the immobilized g-C3N4 with a pyrolysis time of 4 h exhibited optimal NO removal ratio of 57.9%.The outstanding activity can be ascribed to the increased surface area and porosity and promoted charge separation.This work could provide an in situ immobilization approach based on the interaction between the photocatalyst and support,as well as the technical support and theoretical basis in practical application of g-C3N4 in air purification.
【Fund】: 国家自然科学基金(51478070;21501016;51108487);; 国家大学生创新创业训练计划(201411799004)资助
【CateGory Index】: TQ174.1
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