Molecular doping of carbon nitride photocatalysts with tunable bandgap and enhanced activity
Molecular doping of carbon nitride photocatalysts with tunable bandgap and enhanced activity
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带隙可调、活性增强的氮化碳光催化剂的分子掺杂
DOI：
10.1016/j.jcat.2013.01.008
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发表时间：
2014-02-01
影响因子：
7.3
通讯作者：
Wang, Xinchen
中科院分区：
文献类型：
--
作者：
Zhang, Jinshui;Zhang, Mingwen;Wang, Xinchen
采用噻吩分子掺杂共轭氮化碳（CN）修饰CN光催化剂。在共轭聚合物基体中加入富电子噻吩实体可以有效地改变CN的固有体积和表面特征，如设计具有可调带隙的电子结构，通过形成表面二元结构促进电荷载流子的迁移和分离。对噻吩修饰的CN样品也观察到织构、形貌和结晶的显著变化。分子掺杂在体积、表面和织构性能方面的综合优势导致了H-2在可见光下生成的光催化活性的提高，这强调了有机化学方案对新开发的无金属聚合物光催化剂的化学改性的重要性。(C) 2013爱思唯尔公司版权所有。
Molecular doping of conjugated carbon nitride (CN) with thiophene donors was applied for the modification of CN photocatalysts. The incorporation of electron-rich thiophene entities in the conjugated polymer matrix can effectively change the intrinsic bulk and surface features of CN, such as engineering the electronic structure with tunable bandgap and promoting the charge-carrier migration and separation via forming surface dyadic structures. A significant alteration in the texture, morphology, and crystalline was also observed for the thiophene-modified CN samples. The combined benefits of the molecular doping in terms of bulk, surface, and texture properties lead to an improvement in the photocatalytic activity for H-2 generation with visible light, which underlines the importance of organic chemistry protocols for the chemical modification of newly developed metal-free, polymeric photocatalysts. (C) 2013 Elsevier Inc. All rights reserved.