研究目的
Investigating the enhanced visible-light photocatalytic activity of ZnS/BiOBr/graphene oxide ternary composite for organic pollutant degradation.
研究成果
The ternary ZnS/BiOBr/GO composite, especially with 100 mg ZnS and 6 mg GO, exhibits significantly enhanced photocatalytic activity under visible light, achieving 86.6% degradation efficiency for RhB. The presence of zinc vacancies and GO in the composite improves light absorption and the separation of photogenerated electron-hole pairs, leading to higher photocatalytic performance.
研究不足
The study focuses on the photocatalytic degradation of RhB under visible light, and the scalability and practical application of the ternary composite in real-world water treatment scenarios are not explored.
1：Experimental Design and Method Selection:
The ternary composite ZnS/BiOBr/GO was synthesized by solvothermal method. The photocatalysts were characterized by XRD, SEM, TEM, XPS, DRS, and PL to analyze their structure, morphology, and optical properties.
2：Sample Selection and Data Sources:
The samples were prepared with varying amounts of ZnS and GO to study their effect on photocatalytic activity. Rhodamine B (RhB) was used as the organic pollutant to evaluate the photocatalytic performance.
3：List of Experimental Equipment and Materials:
X-ray diffractometer (Germany Bruker AX), NanoSEM 450 (FEI Company), JEOL-2100F transmission electron microscope, F-4600 fluorescence photometer (Hitachi), Carry 100 UV-Vis diffuse reflectance spectrophotometer (Agilent), PHI 5700 ESCA spectrometer for XPS.
4：Experimental Procedures and Operational Workflow:
The photocatalytic activity was tested under a 500 W xenon lamp simulating sunlight. The degradation efficiency of RhB was measured by UV-Vis spectrophotometry.
5：Data Analysis Methods:
The degradation kinetics were analyzed using the Langmuir-Hinshelwood model and pseudo first-order kinetics equation.
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