光催化
可见光谱
多巴胺
化学
材料科学
光化学
化学工程
催化作用
光电子学
有机化学
生物
工程类
神经科学
作者
Pengfei Xia,Mingjin Liu,Jiaguo Yu,Jiaguo Yu,Liuyang Zhang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-05-18
卷期号:6 (7): 8945-8953
被引量:150
标识
DOI:10.1021/acssuschemeng.8b01300
摘要
Photocatalytic water splitting is a promising strategy to convert solar energy into chemical energy. Herein, a series of g-C3N4/polydopamine (g-C3N4/PDA) composites were successfully fabricated by in situ polymerization of dopamine on the g-C3N4 surface. Among all the as-prepared composites, the best photocatalytic hydrogen evolution rate of the as-prepared composites was up to 69 μmol h–1 under the irradiation of visible light (λ > 420 nm), which was about 4.5 times than that of pristine g-C3N4 (16 μmol h–1). The enhancement of photocatalytic H2 evolution is reasonably attributed to the markedly enhanced light harvesting, broadened spectral response range and low onset potential of H2 production, as well as effective separation and rapid transportation of photogenerated charge carriers. More importantly, the surface modification of g-C3N4 by a small amount of PDA can effectively inhibit the overgrowth of Pt nanoparticles (NPs) during the photocatalytic reactions, which promotes the photoelectron injectio...
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