SnFe_(2)O_(4)/ZnIn_(2)S_(4)/PVDF piezophotocatalyst with improved photocatalytic hydrogen production by synergetic effects of heterojunction and piezoelectricity  

作　　者：Ping Su Dezhi Kong Huaihao Zhao Shangkun Li Dafeng Zhang Xipeng Pu Changhua Su Peiqing Cai 

机构地区：[1]School of Materials Science and Engineering,Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology,Liaocheng University,Liaocheng 252000,China [2]College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,China

出　　处：《Journal of Advanced Ceramics》2023年第9期1685-1700,共16页先进陶瓷（英文）

基　　金：supported by Shandong Provincial Natural Science Foundation,China(Nos.ZR2021ME046 and ZR2022ME179);Liaocheng University College Students Innovation and Entrepreneurship Training Program(No.2020205926).

摘　　要：The polarized electric field inside piezoelectric materials has been proven to be a promising technique to boost photogenerated charge separation.Herein,a novel flexible SnFe_(2)O_(4)/ZnIn_(2)S_(4)/polyvinylidene fluoride((CH2CF2)_(n),PVDF)(P-SZ)film piezophotocatalyst was successfully synthesized by combining PVDF,an organic piezoelectric material,with a SnFe_(2)O_(4)/ZnIn_(2)S_(4)(SFO/ZIS)type II heterojunction photocatalyst.The hydrogen evolution rate of SFO/ZIS heterojunction with a SFO content of 5%is about 846.79μmol·h^(−1)·g^(−1),which is 3.6 times that of pristine ZIS.Furthermore,after being combined with PVDF,the optimum hydrogen evolution rate of P-SZ is about 1652.7μmol·h^(−1)·g^(−1)in the presence of ultrasound,which exceeds that of 5%SFO/ZIS by an approximate factor of 2.0.Based on experimental results,the mechanism of the improved photocatalytic performance of P-SZ was proposed on the basis of the piezoelectric field in PVDF and the formed heterojunction between SFO and ZIS,which effectively boosted the separation of photoinduced charges.This work provides an efficient strategy for multi-path collection and utilization of natural solar and vibrational energy to enhance photoactivity.

关 键 词：HETEROJUNCTION piezophotocatalysis SnFe_(2)O_(4)(SFO) ZnIn_(2)S_(4)(ZIS) polyvinylidene fluoride((CH_(2)CF_(2))_(n) PVDF)film 

分 类 号：TQ174.758.23[化学工程—陶瓷工业]