光催化
石墨氮化碳
光激发
质子化
纳米棒
碳纤维
光化学
氮化碳
氢
材料科学
量子点
氮化物
可见光谱
化学工程
化学
纳米技术
催化作用
光电子学
有机化学
原子物理学
复合数
复合材料
物理
激发态
图层(电子)
离子
工程类
作者
Lingling Li,Xunjin Zhu
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2018-09-05
卷期号:1 (9): 5337-5344
被引量:33
标识
DOI:10.1021/acsanm.8b01381
摘要
1D protonated graphitic carbon nitride (HCN) are prepared through free-template chemical method and further modified with different amount of carbon quantum dots (CQDs) to afford new hybrids denoted as HCNC-x (x represents weight ratio of CQDs) for photocatalytic hydrogen evolution. The immobilization of CQDs onto HCN not only significantly improves the visible-light harvesting, but also prolongs the lifetime of charge carriers upon photoexcitation and suppresses the recombination of electron–hole pairs because of the intimate interface formed between the two components with opposite charges. As a result, the HCNC-0.50 show the highest photocatalytic hydrogen evolution rate of 382 μmol h–1 g–1 under visible light irritation, which was about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity is observed for the HCNC-x hybrids that is recycled after 12 h photocatalytic reaction and then exposed to air for half a year.
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