Constructing built-in electric field in graphitic carbon nitride hollow nanospheres by co-doping and modified in-situ Ni_(2)P for broad spectrum photocatalytic activity  

作　　者：Linlin Zhang Wenxing Peng YaKun Li Rui Qin Dong Yue Chengjun Ge Jianjun Liao 

机构地区：[1]ey Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province,School of Ecological and Environmental Sciences,Hainan University,Haikou 570228,China [2]Shandong Ocean Chemical Industry Scientific Research Institute,Weifang 262737,China [3]School of Materials Science and Engineering,Hainan University,Haikou 570228,China

出　　处：《Journal of Materials Science & Technology》2021年第31期143-149,共7页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21866012,61764003 and 41763015);the Basic and Applied Basic Research Program of Hainan Province(No.2019RC023);the Major Science and Technology Planning Project of Hainan Province(No.ZDKJ201810);the Scientific Research Foundation of Hainan University(No.kyqd1659)。

摘　　要：The construction of built-in electric field is generally considered as an effective strategy to enhance photocatalytic performance due to its significant role in charge separation.Herein,a built-in electric field within g-C_(3)N_4 hollow nanospheres co-doped with sulfur and oxygen and modified in-situ Ni_(2)P is proposed.Ni_(2)P/SO-HC_(3)N_4 exhibits significantly enhanced board spectrum photocatalytic properties for hydrogen precipitation(5.21 mmol h^(-1)g^(-1))and photocatalytic Cr(VI)reduction without the use of noble metal.It also achieves high photocatalytic sterilization activity and remarkable stability when used to completely inactivate E.coli(10~7)in 60 min under Vis-NIR light irradiation.The enhanced performance is attributed to the formation of a curved hollow sphere structure,which promotes the electron transfer between the inner and outer layers.In addition,co-doping inhibits the recombination of photogenerated carriers,and the built-in electric field recombined with Ni_(2)facilitates the electron transfer between the composite interfaces.This design strategy demonstrates an original method of devising multifunctional photocatalysts with enhanced activity and stability.

关 键 词：PHOTOCATALYSIS Ni_(2)P g-C_(3)N_4 Hollow nanospheres Pt-free cocatalysts 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] TB383.1[一般工业技术—材料科学与工程]