Semiconductor photocatalysis has been considered as a potential technology for the removal of organic dyes from wastewater.The development of photocatalysts with high stability and strong catalytic activity is the mos...Semiconductor photocatalysis has been considered as a potential technology for the removal of organic dyes from wastewater.The development of photocatalysts with high stability and strong catalytic activity is the most important in application.Visible-light-induced NiCo_(2)O_(4)@Co_(3)O_(4) core/shell heterojunctions were synthesized via a sol-gel method in this paper.Compared to bare NiCo_(2)O_(4) and Co_(3)O_(4),NiCo_(2)O_(4)@Co_(3)O_(4) showed a remarkably enhanced removal rate towards congo red(CR)degradation with 98.4%of the removal rate to CR at 120 min under irradiation.The excellent performance of NiCo_(2)O_(4)@Co_(3)O_(4) benefits from the effective separation of photogenerated electron-holes by forming a heterojunction,and the rapid transfer efficiency of photo-generated charge carriers results from the core/shell architectures.A mechanism that NiCo_(2)O_(4)@Co_(3)O_(4) degrades CR to harmless inorganic substances by h^(+),•O-2 and•OH during the photocatalytic process was proposed.展开更多
基金Project(2017TP1031)supported by the Hunan Key Laboratory for Rare Earth Functional Materials,ChinaProject(2020JJ4735)supported by the Natural Science Foundation of Hunan Province,China+1 种基金Project(2018GK4001)supported by Science and Technology Department of Hunan Province Tackling Key Scientific and Technological Problems and Transformation of Major Scientific and Technological Achievements,ChinaProject(CSUZC202126)supported by the Open Sharing Fund for the Large-scale Instruments and Equipments of Central South University,China。
文摘Semiconductor photocatalysis has been considered as a potential technology for the removal of organic dyes from wastewater.The development of photocatalysts with high stability and strong catalytic activity is the most important in application.Visible-light-induced NiCo_(2)O_(4)@Co_(3)O_(4) core/shell heterojunctions were synthesized via a sol-gel method in this paper.Compared to bare NiCo_(2)O_(4) and Co_(3)O_(4),NiCo_(2)O_(4)@Co_(3)O_(4) showed a remarkably enhanced removal rate towards congo red(CR)degradation with 98.4%of the removal rate to CR at 120 min under irradiation.The excellent performance of NiCo_(2)O_(4)@Co_(3)O_(4) benefits from the effective separation of photogenerated electron-holes by forming a heterojunction,and the rapid transfer efficiency of photo-generated charge carriers results from the core/shell architectures.A mechanism that NiCo_(2)O_(4)@Co_(3)O_(4) degrades CR to harmless inorganic substances by h^(+),•O-2 and•OH during the photocatalytic process was proposed.
