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- Title
Efficient green photocatalyst of Ag/ZnO nanoparticles for methylene blue photodegradation.
- Authors
Guo, Yefei; Fu, Xiaonan; Liu, Ruijie; Chu, Mengyuan; Tian, Weifeng
- Abstract
Ag/ZnO nanoparticles photocatalysts with various Ag concentrations were synthesized through the hydrothermal treatment. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), photoluminescence spectrometry (PL), electron paramagnetic resonance (EPR), and photoelectrochemical experiments. The photocatalytic performance of all samples was examined with the photodegradation experiment for methylene blue (MB) aqueous solution under simulated daylight. Photocatalytic experiment results showed 93.6%, 97.2%, 98.8%, and 99.8% photodegradation of MB, corresponding to the ZnO and the Ag/ZnO photocatalysts with various Ag concentrations. The results indicated that the photodegradation rates of all Ag/ZnO samples were better than that of ZnO. Besides, it was studied on the effects of photocatalyst dosage, pollutant concentration, and the radical oxidative species (ROS) on photocatalytic performance. Furthermore, a reasonable mechanism was proposed for the enhanced photocatalytic performance of the Ag/ZnO samples in photodegradation MB reactions.
- Subjects
PHOTODEGRADATION; METHYLENE blue; ELECTRON paramagnetic resonance; X-ray photoelectron spectroscopy; ZINC oxide; TRANSMISSION electron microscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 5, p2716
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-07478-x