首页|Crystalline carbon nitride with in-plane built-in electric field accelerates carrier separation for excellent photocatalytic hydrogen evolution

Crystalline carbon nitride with in-plane built-in electric field accelerates carrier separation for excellent photocatalytic hydrogen evolution

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Achieving a high carrier migration efficiency by constructing built-in electric field is one of the promising approaches for promoting photocatalytic activity.Herein,we have designed a donor-acceptor(D-A)crys-talline carbon nitride(APMCN)with 4-amino-2,6-dihydroxypyrimidine(AP)as electron donor,in which the pyrimidine ring was well embedded in the heptazine ring via hydrogen-bonding effect during hy-drothermal process.The APMCN shows superior charge-transfer due to giant built-in electric field(5.94 times higher than pristine carbon nitride),thereby exhibiting excellent photocatalytic H2 evolution rate(1350 μmol/h)with a high AQY(62.8％)at 400 nm.Mechanistic analysis based on detailed experimental investigation together with theoretical analysis reveals that the excellent photocatalytic activity is at-tributed to the promoted charge separation by the giant internal electric field originated from the D-A structure.

Crystalline carbon nitrideBuilt-in electric fieldDonor-acceptor structurePhotocatalysisHydrogen production

Wengao Zeng、Yuchen Dong、Xiaoyuan Ye、Ziying Zhang、Tuo Zhang、Xiangjiu Guan、Liejin Guo

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International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China

Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foun-dation of China国家自然科学基金国家自然科学基金中国博士后科学基金中国博士后科学基金China Fundamental Research Funds for the Central Universities

5188810352376209521722482020M6733862020T130503

2024

10.1016/j.cclet.2023.109252

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(4)
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