期刊
出版社
ELSEVIER
DOI: 10.1016/j.mseb.2020.114863
关键词
ZnO; Hollow spheres; Pumice; Photocatalyst; Magnetic materials; Nanocomposites
资金
- Iran University of Science and Technology
In this study, ZnO hollow spheres-pumice nanocomposite was successfully synthesized using a hydrothermal method, showing excellent photocatalytic degradation of Rhodamine B under visible light irradiation. Through investigation of operating parameters, it was found that the sample with 15 wt% ZnO exhibited the highest photocatalytic activity under specific conditions.
The present study deals with the synthesis of ZnO hollow spheres-pumice nanocomposite via a hydrothermal method by employing pumice as the magnetic support. The physicochemical properties of prepared nanocomposites were characterized by XRD, XRF, FT-IR, FE-SEM, TEM, DRS, VSM, PL, BET, and ICP-OES. The photocatalytic activity of samples was evaluated by photocatalytic degradation of Rhodamine B (RhB) as a model pollutant. The influence of operating parameters such as solution pH, initial concentration of pollutant, ZnO loading, photocatalyst dosage, light source, and pumice effect was investigated. The sample with 15 wt% ZnO gave the highest photocatalytic activity at initial concentration of 5 mg/L, pH = 9, and 10 g/L of nanocomposite under visible light irradiation. According to obtained results, the major active species in the photodegradation process were the holes. Also, the obtained results from the COD technique indicated that about 86% of RhB was mineralized at the optimized conditions.
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