Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 852, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.156848
Keywords
ZnO/Agl composite; Heterostructure; Band gap; Theoretical calculation; Photocatalytic degradation mechanism; Piezo-photocatalysis coupling effect
Categories
Funding
- Fundamental Research Funds for the Central Universities [NS2017038, NE2017101]
- National Natural Science Foundation of China of China [51572123, 61474063, 61774085]
- Six talent peaks project in Jiangsu Province [XCL-046]
- Science and Technology Development Project of Suzhou [SYG201818]
- Open Projects of the International Joint Laboratory of Chinese Education Ministry on Resource Chemistry [A-2017-002]
- State Key Laboratory of Materials-Oriented Chemical Engineering [KL17-06]
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The synthesis and properties of AgI nanoparticles decorated with ZnO flower-like composites were investigated, showing high photocatalytic efficiency and stability in the degradation of organic pollutants. Ultrasonic vibration can accelerate the separation of carriers, enhancing the photodegradation effect.
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.
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