Synergistic Enhancement of Photocatalytic CO2 Reduction by Built-in Electric Field/Piezoelectric Effect and Surface Plasmon Resonance via PVDF/CdS/Ag Heterostructure

被引：19

作者：

Wei, Zijun ^{[1
]}

Ji, Tuo ^{[1
]}

Zhou, Xuemei ^{[1
]}

Guo, Jiawei ^{[1
]}

Yu, Xin ^{[1
]}

Liu, Hong ^{[1
,2
]}

Wang, Jingang ^{[1
]}

机构：

[1] Univ Jinan, Inst Adv Interdisciplinary Res iAIR, Jinan 250022, Peoples R China

[2] Shandong Univ, State Key Lab Crystal Mat, 27 Shandanan Rd, Jinan 250100, Shandong, Peoples R China

来源：

SMALL | 2023年 / 19卷 / 52期

关键词：

built-in electric field; CO2; reduction; photocatalysis; piezoelectric effect; polyvinylidene fluoride nanofibrous membranes; SULFUR VACANCIES; PHOTOREDUCTION; TIO2; NANOPARTICLES; PERFORMANCE; CONVERSION; NANOSHEETS;

D O I：

10.1002/smll.202304202

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photocatalytic reduction of CO2 using solar energy is an effective means to achieve carbon neutrality. However, the photocatalytic efficiency still requires improvements. In this study, polyvinylidene fluoride (PVDF) ferroelectric/piezoelectric nanofiber membranes are prepared by electrospinning. Cadmium sulfide (CdS) nanosheets are assembled in situ on the surface of PVDF based on coordination between F- and Cd2+, and then Ag nanoparticles are deposited on CdS. Because of the synergistic effect between localized surface plasmon resonance of Ag nanoparticles and the built-in electric field of PVDF, the CO2 photocatalytic reduction efficiency using PVDF/CdS/Ag under visible light irradiation is significantly higher than that of any combination of CdS, CdS/Ag, or PVDF/CdS. Under micro-vibration to simulate air flow, the CO2 reduction efficiency of PVDF/CdS/Ag is three times higher than that under static conditions, reaching 240.4 mu mol g(-1) h(-1). The piezoelectric effect caused by micro-vibrations helps prevent the built-in electric field from becoming saturated with carriers and provides a continuous driving force for carrier separation.

引用

页数：12