研究目的
To study the structure and optical properties of CdS nanobelts and CdS/ZnO heterostructures and their photocatalytic performances under visible light irradiation.
研究成果
The degradation rate of RhB using CdS/ZnO heterostructures as catalyst is significantly higher than that of CdS nanobelts, suggesting better development prospect in photocatalytic technology and photoelectric device.
研究不足
The content of ZnO quantum dots is low, there is no obvious ZnO diffraction peak in the XRD patterns. CdS is prone to photocorrosion in aqueous media containing oxygen, which greatly restricts the photocatalytic degradation ability.
1：Experimental Design and Method Selection:
CdS/ZnO heterostructures were prepared by thermal evaporation and thermal decomposition method step by step. Size and distribution of ZnO quantum dots on CdS nanobelt were controlled by concentrations of zinc acetate ethanol solution and thermal decomposition temperature.
2：Sample Selection and Data Sources:
CdS nanobelts were synthesized by thermal evaporation method. CdS/ZnO nanobelt/quantum dot was prepared by thermal decomposition method.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD) (D8ADVANCE Bruker-axs), TEM (JEM-2010), Raman scattering (Jobin Yvon HR800) and PL spectrum (Jobin Yvon HR800), UV–Vis spectrophotometer (HITACHIU 3100).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: CdS nanobelts were dipped in zinc acetate ethanol solution for 30 min, then heated at given temperature under the condition of Ar gas protection. Photocatalytic activities were tested by monitoring the degradation of Rhodamine B (RhB) aqueous solution.
5：Data Analysis Methods:
The concentration of RhB was determined by recording the absorbance at 554 nm using a UV–Vis spectrophotometer.
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