研究目的
To prepare a novel magnetic photocatalyst by grafting Preyssler-type polyoxometalate onto Fe3O4 nanoparticles via an internal layer of silver nanoparticles and assess its photocatalytic activity by decolourisation of Rhodamine B under UV irradiation.
研究成果
The synthesised Preyssler-based nanocomposite acted as an effective magnetic heterogeneous photocatalyst for the removal of rhodamine B, showing good photocatalytic activity and easy recovery by an external magnetic field. The nanocomposite demonstrated stability and recyclability with minimal loss of activity after four cycles.
研究不足
The study focused on the photocatalytic decolourisation of rhodamine B under UV light irradiation. The performance under visible light was noted to be significantly lower. The recyclability was tested up to four cycles with a slight decrease in activity.
1：Experimental Design and Method Selection:
The study involved the synthesis of a magnetic photocatalyst by grafting Preyssler-type polyoxometalate onto Fe3O4 nanoparticles via an internal layer of silver nanoparticles. The photocatalytic activity was tested by the decolourisation of rhodamine B under UV light irradiation.
2：Sample Selection and Data Sources:
Rhodamine B was selected as the model pollutant to test the photocatalytic activity of the synthesised nanocomposite.
3：List of Experimental Equipment and Materials:
Scanning Electron Microscope (SEM), transmission electron microscopy (TEM), electron dispersive X-ray analysis (EDAX), UV–vis spectrophotometer.
4：Experimental Procedures and Operational Workflow:
The synthesis involved functionalising Fe3O4 nanoparticles with amine, coating with silver nanoparticles, and grafting Preyssler-type polyoxometalate. The photocatalytic activity was tested under UV light irradiation.
5：Data Analysis Methods:
The decolourisation efficiency was analyzed using UV–vis spectra.
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