Face-to-face heterojunctions within 2D/2D porous NiCo oxyphosphide/g-C_(3)N_(4)towards efficient and stable photocatalytic H_(2)evolution  

作　　者：Genrui Zhang Xiaojing Li Na Li Tingting Wu Lei Wang 

机构地区：[1]Key Laboratory of Eco-chemical Engineering,Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science,Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology,Qingdao University of Science and Technology,Qingdao 266042,China [2]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [3]College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [4]College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Nano Research》2023年第5期6568-6576,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52072197 and 52102272);Taishan Scholar Young Talent Program(No.tsqn201909114);the Natural Science Foundation of Shandong Province(No.ZR2021QE063);Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004);Major Scientific and Technological Innovation Project(No.2019JZZY020405);Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14);Major Basic Research Program of the Natural Science Foundation of Shandong Province(No.ZR2020ZD09);Talent Foundation funded by Province and Ministry Co-construction Collaborative Innovation Center of Eco-chemical Engineering(No.STHGYX2213).

摘　　要：Constructing 2D/2D face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites.Herein,2D porous NiCo oxyphosphide(NiCoOP)was synthesized for the first time and coupled with graphitic carbon nitride(g-C_(3)N_(4))nanosheets to form 2D/2D heterojunctions via an in-situ phosphating method.The optimal 4 wt.%2D/2D NiCoOP/g-C_(3)N_(4)(OPCN)photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h^(−1)·g^(−1),which is 33 times higher than that of pure g-C_(3)N_(4).The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions.Amazingly,the 2D/2D OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions.This study not only designs new noble-metal-free NiCoOP/g-C_(3)N_(4)composite photocatalysts but also provides a new sight in fabricating face-to-face 2D/2D heterojunctions for their application in energy conversion areas.

关 键 词：2D porous NiCo oxyphosphide(NiCoOP) graphitic carbon nitride(g-C_(3)N_(4))nanosheets 2D/2D heterojunction PHOTOCATALYST hydrogen evolution 

分 类 号：TB383[一般工业技术—材料科学与工程]