Graphite phase carbon nitride(g-C_(3)N_(4))is a promising catalyst for artificial photocatalytic carbon dioxide(CO_(2))reduction.However,the fast carrier recombination and the inadequacy of the CO_(2)reduction active ...Graphite phase carbon nitride(g-C_(3)N_(4))is a promising catalyst for artificial photocatalytic carbon dioxide(CO_(2))reduction.However,the fast carrier recombination and the inadequacy of the CO_(2)reduction active site in g-C_(3)N_(4)block the escalation of the perfor-mance.In this work,NiCo layered double hydroxide(NiCo LDH)nanoflowers were self-assembled with ultrathin graphite phase carbon nitride(g-C_(3)N_(4))by an ultrasonic stirring strategy utilizing the Zeta potential difference.The formed NiCo LDH/ultrathin g-C_(3)N_(4)nanosheets(LDH-CN)photocatalysts own the merits of rich active sites and Z-scheme heterojunction,which lead to the enhanced CO_(2)reduction activity and selectivity.The highest yields of CO and CH_(4)were 114.24 and 26.48μmol·h^(-1)·g^(-1),which were much greater than those of g-C_(3)N_(4)and LDH.Meanwhile,the enhanced selectivity for CO confirmed the strong redox ability in the LDH-CN caused by the Z-scheme.The heterojunction-induced built-in electrical field can promote the separation and migration of photoinduced electrons and holes.This study provides a theoretical basis for designing high-performance photocatalysts.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.22005123, 21776118,22178152 and 22008095)Jiangsu University Foundation (No.20JDG16)+4 种基金Jiangsu Funds for Distinguished Young Scientists (No.BK20190045)the Special Foundation of China Postdoctoral (No.2020TQ0127)Jiangsu Province Postdoctoral Science Foundation (Nos.2021K396C and 2021K382C)Jiangsu Agricultural Science and Technology Independent Innovation Fund (No.CX (21)3067)the Postgraduate High-tech Research Key Laboratory of Zhenjiang (No.SS2018002)
文摘Graphite phase carbon nitride(g-C_(3)N_(4))is a promising catalyst for artificial photocatalytic carbon dioxide(CO_(2))reduction.However,the fast carrier recombination and the inadequacy of the CO_(2)reduction active site in g-C_(3)N_(4)block the escalation of the perfor-mance.In this work,NiCo layered double hydroxide(NiCo LDH)nanoflowers were self-assembled with ultrathin graphite phase carbon nitride(g-C_(3)N_(4))by an ultrasonic stirring strategy utilizing the Zeta potential difference.The formed NiCo LDH/ultrathin g-C_(3)N_(4)nanosheets(LDH-CN)photocatalysts own the merits of rich active sites and Z-scheme heterojunction,which lead to the enhanced CO_(2)reduction activity and selectivity.The highest yields of CO and CH_(4)were 114.24 and 26.48μmol·h^(-1)·g^(-1),which were much greater than those of g-C_(3)N_(4)and LDH.Meanwhile,the enhanced selectivity for CO confirmed the strong redox ability in the LDH-CN caused by the Z-scheme.The heterojunction-induced built-in electrical field can promote the separation and migration of photoinduced electrons and holes.This study provides a theoretical basis for designing high-performance photocatalysts.
