研究目的
Investigating the efficiency of nanocrystalline ZnO doped lanthanide oxide as a photocatalyst for the degradation of diesel pollutant in seawater under visible light irradiation.
研究成果
The Er3+-ZnO composite photocatalyst effectively degrades diesel pollutants in seawater under visible light irradiation, with an optimal degradation rate of 99.38% under specific conditions. The study highlights the potential of utilizing sunlight more efficiently for photocatalytic technology in treating organic pollutants.
研究不足
The study is limited to the degradation of diesel pollutants in seawater under controlled laboratory conditions. The practical application in natural seawater with varying conditions may require further optimization.
1：Experimental Design and Method Selection:
The study employed a co-precipitation method to prepare Er3+-ZnO photocatalysts with varying doping ratios. The photocatalytic degradation efficiency was analyzed under visible light irradiation.
2：Sample Selection and Data Sources:
Diesel pollutant in seawater was used as the target pollutant. The photocatalysts were characterized by SEM and XRD analysis.
3：List of Experimental Equipment and Materials:
The main experimental chemicals included Zn(NO3)2·6H2O, Er(NO3)3·5H2O, CTMAB, NaOH solution, and absolute ethanol. The apparatus consisted of an ultrasonic cleaner, a drying oven, a UV-visible spectrophotometer, an X-ray diffraction, a muffle furnace, magnetic stirrers, and fluorescent lamps.
4：Experimental Procedures and Operational Workflow:
The photocatalysts were prepared by co-precipitation, characterized, and then used in photocatalytic degradation experiments under varying conditions (dosage, doping ratio, initial concentration of diesel, pH value, concentration of H2O2, and illumination time).
5：Data Analysis Methods:
The degradation rate was calculated based on the residual concentration of diesel measured by spectrophotometer at 225 nm.
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