Flexoelectricity-induced enhancement in carrier separation and photocatalytic activity of a photocatalyst

被引：118

作者：

Cheng, Tingting ^{[1
]}

Gao, Huajing ^{[1
]}

Li, Ruishan ^{[1
]}

Wang, Shifa ^{[2
]}

Yi, Zao ^{[3
]}

Yang, Hua ^{[1
]}

机构：

[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

[2] Chongqing Three Gorges Univ, Sch Elect & Informat Engn, Chongqing 404000, Wanzhou, Peoples R China

[3] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Sichuan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 566卷

基金：

中国国家自然科学基金;

关键词：

Flexoelectricity; Photoexcited carrier separation; Ag2MoO4; Pollutant degradation; Flexo-photocatalytic mechanism; VISIBLE-LIGHT; MECHANICAL ENERGY; INORGANIC-IONS; DEGRADATION; NANOWIRES; METAL; PERFORMANCE; OXIDATION; ALCOHOLS; SOLAR;

D O I：

10.1016/j.apsusc.2021.150669

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we have elucidated the role of flexoelectricity in the photoexcited carrier separation and photocatalysis enhancement by comparatively investigating the photocatalytic, flexocatalytic and flexo-photocatalytic activities of centrosymmetric Ag2MoO4 photo-catalyst for degrading methylene blue (MB). Ultrasonic vibration was used to induce the flexoelectric effect in Ag2MoO4, and the flexo-photocatalytic experiment was performed by simultaneously irradiating the reaction solution with simulated sunlight and ultrasonic wave. It is demonstrated that the photo-flexocatalysis of Ag2MoO4 is much higher than its single photocatalysis and flexocatalysis, implying an obvious flexoelectricity-enhanced mechanism of photocatalysis. To incorporate the photo-flexocatalysis of Ag2MoO4 into practical application in environmental purification, the effects of initial MB concentration, catalyst dosage, pH and various anions on the flexo-photocatalytic degradation of MB over Ag2MoO4 were investigated. Flexo-photocatalytic degradation of methyl orange (MO)/rhodamine B (RhB)/MB mixture dyes and other organic pollutants including tetracycline hydrochloride (TC) and ciprofloxacin (CIP) were also investigated, further confirming the excellent flexo-photocatalytic performance of Ag2MoO4.

引用

页数：10

共 70 条

[1] Antimicrobial activity of Titanium dioxide and Zinc oxide nanoparticles supported in 4A zeolite and evaluation the morphological characteristic [J].