期刊
REGIONAL STUDIES IN MARINE SCIENCE
卷 18, 期 -, 页码 139-144出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.rsma.2018.02.006
关键词
Ytterbium oxide; Zinc oxide; Photocatalytic degradation; Visible light; Diesel pollutants
资金
- Marine research and special funds public service sectors of State Oceanic Administration People's Republic of China [201305002]
- Industrial enterprise technology correspondent action Scientific and technological cooperation project funds Department of Science and Technology of Liaoning [20130106]
Photocatalyst composites were prepared by coprecipitation and characterized by XRD, SEM, and UV-Vis DRS methods. A substantially enhanced photocatalyst activity was observed in degradation of diesel pollutants in seawater, compared to zinc oxide without dopant. Photocatalytic degradation of diesel pollutants in seawater and the effects of factors on the composite's photocatalytic effectiveness were studied under visible light and various conditions. This degradation in seawater was optimized using an orthogonal experimental plan. According to the results, diesel removal was 26.95% without any catalyst (losses only by evaporation) and the greatest effects occurred when the initial diesel concentration was 0.25 g/L, catalyst dose at 0.4 g/L, catalyst-doping ratio at 10%, pH at 9.0, H2O2 at 6.0 mg/L, and illumination time at 2.5 h, in which case the diesel removal rate reached 93.89%. This study elaborated a means for making zinc oxide utilize visible light more efficiently and thus accelerate the practical application of photocatalytic technology in organic pollutant remediation. (C) 2018 Elsevier B.V. All rights reserved.
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