Re-usable Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF piezo-photocatalytic film with exceptional hydrogen evolution capability triggered by the synergetic advantages of piezoelectricity and S-Scheme heterojunction  

作　　者：Ping Su Dong Zhang Minghui Zhu Tengteng Liang Nan Yang Huaihao Zhao Dafeng Zhang Junchang Liu Peiqing Cai Xipeng Pu 

机构地区：[1]School of Materials Science and Engineering,Shandong Provincial Key Laboratory of Chemical Energy Science and Novel Cell Technology,Liaocheng University,Liaocheng 252000,Shandong,China [2]School of Physics Science and Information Technology,Shandong Key Laboratory of Optical Communication Sciencend Technology,Liaocheng University,Liaocheng 252000,Shandong,China [3]College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第9期164-176,共13页能源化学（英文版）

基　　金：supported by the Shandong Provincial Natural Science Foundation,China(ZR2022ME179,ZR2021ME046).

摘　　要：Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic reaction.Herein,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF(CZS-ZO@C/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion method.Benefiting from the piezoelectricity of PVDF and the internal electric field(IEF)of CZS-ZO@C Step-scheme(S-Scheme)heterojunction,CZS-ZO@C/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of Cd_(0.9)Zn_(0.1)S/PVDF(CZS/PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and COMSOL simulation illustrated the excellent piezoelectricity of CZS-ZO@C/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical tests.This study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.

关 键 词：Piezo-photocatalysis HETEROJUNCTION Cd_(0.9)Zn_(0.1)S Zno@c PVDF 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] TQ116.2[化学工程—无机化工]