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c-i codoped porous g-c_3N_4 for superior photocatalytic hydrogen evolution

chinese Journal of catalysis 2018年第10期39卷 1615-1624页

作者： chuanfeng Yang Wei Teng Yanhua Song Yanjuan cui School of Environmental and chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina

Porous c‐i codoped carbon nitride materials were synthesized by in‐situ codoping with iodized ionic liquid followed by post‐thermal treatment in *** effects of doping content of c‐i codoping with different amounts of ionic liquid on the structural,optical and photocatalytic properties of the samples were *** results show that more compact interlayer sacking can be achieved by post‐thermal *** with c‐i codoping by insertion of ionic liquids,much enlarged surface area but optimized sp2 conjugated heterocyclic structure can be found in the *** and energy band analysis results evidence that the light absorptions especially in visible light region are significantly *** the band gap of porous c‐i codoped samples enlarge because of the generation of porous,the negatively shifted conduction band position thermodynamically supplies stronger motivation for water *** tests reveal that the photo‐induced electron density was increased after c‐i codoping ***,the recombination rate of electron‐hole pairs is remarkably *** catalysts with moderate c‐i codoing content perform sharply enhanced photocatalytic H2 evolution activity under visible light irradiation.A H2 evolution rate of 168.2μmol/h was achieved and it was more than 9.8 times higher than pristine carbon *** study demonstrates a novel non‐metal doping strategy for synthesis and optimization of polymer semiconductor with gratifying photocatalytic H2 evolution performance from water hydrolysis.

关键词： Porous carbon nitride c‐i codoping Post‐thermal treatment Photocatalysis H2 evolution

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