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In situ fabrication of cdmoo4/g-c3n4 composites with improved charge separation and photocatalytic activity under visible light irradiation

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chinese Journal of catalysis 2020年第1期41卷 170-179页

作者： Bo chai Juntao Yan guozhi Fan guangsen Song chunlei Wang Hubei Key Laboratory of Animal nutrition and Feed Science Wuhan Polytechnic UniversityWuhan 430023HubeiChina School of chemical and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023HubeiChina

To further improve the charge separation and photocatalytic activities of g-c3n4 and cdmoo4 under visible light irradiation,cdmoo4/g-c3n4 composites were rationally synthesized by a facile precipitation-calcination *** crystal phases,morphologies,chemical compositions,textural structures,and optical properties of the as-prepared composites were characterized by the corresponding analytical *** photocatalytic activities toward degradation of rhodamine B solution were evaluated under visible light *** results revealed that integrating cdmoo4 with g-c3n4 could remarkably improve the charge separation and photocatalytic activity,compared with those of pristine g-c3n4 and *** would be because the cdmoo4/g-c3n4 composites could facilitate the transfer and separation of the photoexcited electron-hole pairs,which was confirmed by electrochemical impedance spectroscopy,transient photocurrent responses,and photoluminescence ***,active species trapping experiments demonstrated that holes(h+)and superoxide radicals(?O2?)were the main active species during the photocatalytic reaction.A possible photocatalytic mechanism was proposed on the basis of the energy band structures determined by Mott-Schottky *** work would provide further insights into the rational fabrication of composites for organic contaminant removal.

关键词： cdmoo4/g-c3n4 composite Heterojunction charge separation Visible light Photocatalytic activity

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