研究目的
To develop a novel and economical rod-like zinc oxide–silicon dioxide (ZS) nanocomposite for the photocatalytic degradation of methylene blue (MB) in water under sunlight irradiation.
研究成果
The ZnO-SiO2 nanocomposite synthesized via co-precipitation method showed high photocatalytic activity under sunlight irradiation, achieving 97.8% degradation efficiency of MB dye in 90 minutes. The study opens new avenues for the development of ZS-based nanocomposites for wastewater treatment.
研究不足
The study focuses on the degradation of MB dye under sunlight irradiation, and the efficiency may vary with other pollutants or under different light sources. The scalability and practical application in industrial wastewater treatment need further investigation.
1：Experimental Design and Method Selection:
The synthesis of ZnO-SiO2 nanocomposite was carried out using a co-precipitation method with different surfactants (CTAB, PVP, SDS). The phase identification, surface topography, and optical properties were analyzed using XRD, SEM, UV-Visible, and Photoluminescence Spectroscopy.
2：Sample Selection and Data Sources:
The samples were prepared with zinc acetate dihydrate and tetraethoxysilane (TEOS) as precursors, with the addition of surfactants to study their effect on the photocatalytic activity.
3：List of Experimental Equipment and Materials:
X-Ray Diffractometer (Bruker D8 Discover), SEM (JEOL JSM 6360), UV-Visible spectrophotometer (Shimadzu UV-1800), Photoluminescence spectrometer (JASCO FP-6300), FTIR spectrometer (Shimadzu IR Prestige 21).
4：1).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The photocatalytic activity was measured by degrading MB dye under sunlight irradiation, with samples taken at regular intervals to measure the degradation efficiency using UV-Vis spectroscopy.
5：Data Analysis Methods:
The photocatalytic degradation efficiency was calculated using the Langmuir–Hinshelwood kinetic model.
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