Constructing built-in electric field in graphitic carbon nitride hollow nanospheres by co-doping and modified in-situ Ni2P for broad spectrum photocatalytic activity

Linlin Zhang ¹Wenxing Peng ¹YaKun Li ²Rui Qin ¹Dong Yue ³Chengjun Ge ¹Jianjun Liao¹

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作者信息

1. Key Laboratory of Ago-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
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Abstract

The construction of built-in electric field is generally considered as an effective strategy to enhance pho-tocatalytic performance due to its significant role in charge separation.Herein,a built-in electric field within g-C3N4 hollow nanospheres co-doped with sulfur and oxygen and modified in-situ Ni2P is pro-posed.Ni2P/SO-HC3N4 exhibits significantly enhanced board spectrum photocatalytic properties for hy-drogen 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 (107) 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 Ni2P facilitates the electron transfer between the composite interfaces.This design strategy demonstrates an original method of devising multifunctional photocatalysts with enhanced activity and stability.

Key words

Photocatalysis/Ni2P/g-C3N4/Hollow nanospheres/Pt-free cocatalysts

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基金项目

National Natural Science Foundation of China(21866012)

National Natural Science Foundation of China(61764003)

National Natural Science Foundation of China(41763015)

Basic and Applied Basic Research Program of Hainan Province(2019RC023)

Major Science and Technology Plan-ning Project of Hainan Province(ZDKJ201810)

Scientific Research Foundation of Hainan University(kyqd1659)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量48

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