Surface modification induced construction of core-shell homojunction of polymeric carbon nitride for boosted photocatalytic performance

被引:17
作者
Yang, Fei [1 ]
Ba, Guiming [2 ]
Wang, Zhen [2 ]
Li, Haiping [2 ]
机构
[1] Shandong Univ, Sch Pharmaceut Sci, Jinan 250012, Shandong, Peoples R China
[2] Shandong Univ, Natl Engn Res Ctr Colloidal Mat, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China
基金
中国博士后科学基金;
关键词
Carbon nitride; Photocatalysis; Homojunction; Hydrogen evolution; Surface modification; CHARGE SEPARATION; FACILE SYNTHESIS; G-C3N4; WATER; H-2; EVOLUTION; HYDROXYLATION; REDUCTION; DRIVEN; PHASE;
D O I
10.1016/j.jcis.2021.03.014
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Surface modification has been considered a simple and effective strategy to enhance the photocatalytic activity of polymeric carbon nitride (CN), but resultant difference of energy band structures between the modified surface layer and the unmodified inside in the sample has always been neglected. Herein, maleoyl-modified CN (MaCN) was simply prepared via a dehydration reaction between CN and maleic acid, and exhibits enhanced charge separation, optical absorption, and thus photocatalytic hydrogen evo-lution activity, relative to the bulk CN. The surface modification causes variation of the band structure, suggesting the difference of band levels between the surface layer with maleoyl-modification and the inside without any modification in MaCN, and the surface layer and the inside with matched band levels form type-II core-shell homojunction to enhance the charge separation. This work expounds a conceptual framework of core-shell homojunction in surface-modified CN photocatalysts. (c) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码:64 / 72
页数:9
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