Graphitic carbon nitride/antimonene van der Waals heterostructure with enhanced photocatalytic CO_(2) reduction activity

作     者：Jinfeng Zhang Junwei Fu Kai Dai Jinfeng Zhang;Junwei Fu;Kai Dai

作者机构：Key Laboratory of Green and Precise Synthetic Chemistry and ApplicationsMinistry of EducationHuaibei Normal UniversityHuaibei 235000China School of Physics and ElectronicsCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第116卷第21期

页      面：192-198页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by National Natural Science Foundation of China(Nos.22002189 and 51973078) the Open Project from Key Laboratory of Green and Precise Synthetic Chemistry and Applications(No.2020KF07) the Distinguished Young Scholar of Anhui Province(No.1808085J14) the Key Foundation of Educational Commission of Anhui Province(Nos.KJ2019A0595 and KJ2020ZD005) 

主　　题：Photocatalysis Carbon nitride Antimonene Van der Waals heterostructure CO_(2)activation 

摘      要：Photocatalytic reduction of CO_(2) into valuable fuels is one of the potential strategies to solve the carbon cycle and energy *** carbon nitride(g-C_(3)N_(4)),as a typical two-dimensional(2D)semiconductor with a bandgap of∼2.7 eV,has attracted wide attention in photocatalytic CO_(2) ***,the performance of g-C_(3)N_(4) is greatly limited by the rapid recombination of photogenerated charge carriers and weak CO_(2) activation *** of van der Waals heterostructure with the maximum interface contact area can improve the transfer/seperation efficiency of interface charge *** metal antimony(Sb)nanosheet(antimonene)with high carrier mobility and 2D layered structure,is a good candidate material to construct 2D/2D Sb/g-C_(3)N_(4) van der Waals *** this work,the density functional theory(DFT)calculations indicated that antimonene has higher carrier mobility than g-C_(3)N_(4) *** charge transfer and in-plane structure distortion will occur at the interface of Sb/g-C_(3)N_(4),which endow stronger CO_(2) activation ability on di-coordinated N active *** ultrathin g-C_(3)N_(4) and antimonene nanosheets were prepared by ultrasonic exfoliation method,and Sb/g-C_(3)N_(4) van der Waals heterostructures were constructed by self-assembly *** photoluminescence(PL)and time-resolved photoluminescence(TRPL)indicated that the Sb/g-C_(3)N_(4) van der Waals heterostructures have a better photogenerated charge separation efficiency than pure g-C_(3)N_(4) ***-situ FTIR spectroscopy demonstrated a stronger ability of CO_(2) activation to^ (∗)COOH on Sb/g-C_(3)N_(4) van der Waals *** a result,the Sb/g-C_(3)N_(4) van der Waals heterostructures showed a higher CO yield with 2.03 umol g^(−1) h^(−1),which is 3.2 times that of pure g-C_(3)N_(4).This work provides a reference for activating CO_(2) and promoting CO_(2) reduction by van der Waals heterostructure.