Significant Enhancement of Visible-Light-Driven Hydrogen Evolution by Structure Regulation of Carbon Nitrides

ACS Nano
Qing HanLiangti Qu

Abstract

Photocatalytic water splitting for hydrogen evolution by utilizing solar energy has a great significance for high-density solar energy storage and environmental sustainability. Here, a defect-rich amorphous carbon nitride (DACN) photocatalyst has been synthesized by simply direct calcination of the rationally size-reduced urea crystals. The introduction of nitrogen vacancies combined with disordered structure cause a broad visible-light-reponsive range, countless lateral edge/exposed surface bonding sites, and quenched radiative recombination, suggesting that this DACN enhances photocatalytic activity for hydrogen production. A record high hydrogen evolution rate of 37,680 μmol h-1 g-1 under visible-light irradiation and an extraordinary apparent quantum efficiency of 34.4% at 400 nm were achieved, higher than most of the existing graphitic carbon nitride-based photocatalysts.

References

Aug 8, 2008·Nature Nanotechnology·Xu DuEva Y Andrei
Nov 11, 2008·Nature Materials·Xinchen WangMarkus Antonietti
Dec 18, 2008·Chemical Society Reviews·Akihiko Kudo, Yugo Miseki
Dec 22, 2009·Chemical Society Reviews·Tarn C JohnsonMartin Wills
Aug 5, 2010·Journal of the American Chemical Society·Gang LiuHui-Ming Cheng
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Sep 16, 2014·Angewandte Chemie·Yun ZhengXinchen Wang
Feb 24, 2015·Advanced Materials·Shaowen CaoMietek Jaroniec
Jul 28, 2015·Angewandte Chemie·Qing HanLiangti Qu

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Citations

Jul 20, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Shipeng WanQin Zhong
Nov 7, 2019·Chemical Communications : Chem Comm·Mingjin LiuJiaguo Yu
Jan 17, 2019·Physical Chemistry Chemical Physics : PCCP·Jiawei XueTetsuro Majima
Sep 24, 2020·Small·Zhixiang JiangSan Ping Jiang
Feb 26, 2021·Chemical Communications : Chem Comm·Xiao ZhangSan Ping Jiang
Mar 6, 2021·Small·Bing LuLiangti Qu
Aug 29, 2018·Journal of the American Chemical Society·Hatice KasapErwin Reisner

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