Enhanced visible-light photocatalytic performances of ZnO through loading AgI and coupling piezo-photocatalysis

被引：58

作者：

Liu, Jinsong ^{[1
,2
,3
]}

Chen, Jixun ^{[1
]}

Wu, Zhengying ^{[4
,5
]}

Zhu, Kongjun ^{[2
]}

Wang, Jing ^{[2
]}

Li, Ziquan ^{[1
,6
]}

Tai, Guoan ^{[2
]}

Liu, Xiaoqin ^{[5
]}

Lu, Songlong ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Dept Mat Sci & Technol, Nanjing 211106, Jiangsu, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

[3] Jiangsu Key Lab Electrochem Energy Storage Techno, Nanjing, Peoples R China

[4] Suzhou Univ Sci & Technol, Lab Environm Funct Mat, Suzhou 215009, Peoples R China

[5] Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

[6] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Nanjing 210003, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 852卷

基金：

中国国家自然科学基金;

关键词：

ZnO/Agl composite; Heterostructure; Band gap; Theoretical calculation; Photocatalytic degradation mechanism; Piezo-photocatalysis coupling effect; ONE-POT SYNTHESIS; DRIVEN PHOTOCATALYSTS; AGBR NANOPARTICLES; OPTICAL-PROPERTIES; METHYLENE-BLUE; NANOCOMPOSITES; DEGRADATION; DYE; MECHANISM; OXIDE;

D O I：

10.1016/j.jallcom.2020.156848

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：

AgI nanoparticles decorated with ZnO flower-like composites were successfully synthesized via citric acid-induced hydrothermal reaction and subsequent chemical deposition in the presence of ammonium hydroxide. The effects of AgI-loading content and the piezoelectric effect of ZnO were investigated using different technologies. The crystal structures and optical and photocatalytic properties revealed that the AgI particles were successfully loaded on the flower-like ZnO through the directed diffusion process of charge-induced deposition. Results also showed that the band gap of the AgI/ZnO composite located between those of the ZnO and the AgI, which was consistent with the theoretic simulation. The degradation rate of RhB induced by the Ag/ZnO composites was three times larger than that of AgI, and the heterojunction exhibited high photocatalytic degradation efficiency for MO and TC. Besides, the photodegradation efficiency remained high after six times. Radical scavenger experiments implied that e(-) and h(+) played important roles in the photocatalytic process. The photodegradation time was considerably shortened while maintaining increased degradation efficiency after adding ultrasonic vibration due to the rapid separation of carriers caused by the piezo-photocatalysis coupling effect. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：8

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