Abstract
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.
基金项目
Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foun-dation of China(51888103)
国家自然科学基金(52376209)
国家自然科学基金(52172248)
中国博士后科学基金(2020M673386)
中国博士后科学基金(2020T130503)
China Fundamental Research Funds for the Central Universities()
NETL
NSTL
万方数据