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PVP influence on Mn-CdS for efficient photocatalytic activity
S P Keerthana1, R Yuvakkumar1, G Ravi1
1Department of Physics, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India.
Chemosphere
|March 29, 2021
Summary
This study developed PVP-assisted Mn-CdS nanoparticles for efficient wastewater treatment. The 2% PVP-Mn-CdS catalyst demonstrated 98% efficiency in degrading methylene blue dye under visible light, showing high reusability for environmental remediation.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Wastewater contamination by industrial effluents, including organic dyes and heavy metals, poses a significant environmental challenge.
- Effective wastewater treatment methods are crucial for environmental protection and water resource recycling.
Purpose of the Study:
- To synthesize and characterize Polyvinylpyrrolidone (PVP)-assisted Manganese-Cadmium Sulfide (Mn-CdS) nanoparticles.
- To evaluate the photocatalytic degradation efficiency of these nanoparticles for removing organic dyes from wastewater.
- To investigate the effect of PVP concentration on the structural, optical, and morphological properties of Mn-CdS nanoparticles.
Main Methods:
- Novel hydrothermal synthesis technique used to prepare pure and PVP-assisted Mn-CdS nanoparticles.
- Characterization using UV-Vis spectroscopy, Scanning Electron Microscopy (SEM), and other analytical techniques.
- Photocatalytic degradation experiments conducted using Methylene Blue dye under visible light irradiation.
Main Results:
- UV-Vis spectra indicated a narrowing of the bandgap with increasing PVP concentration (2.2 eV for pure Mn-CdS, 2.06 eV for 1% PVP-Mn-CdS, and 1.99 eV for 2% PVP-Mn-CdS).
- SEM studies revealed enhanced morphology and reduced agglomeration in PVP-assisted Mn-CdS nanoparticles, with the 2% PVP-Mn-CdS sample showing superior nanorod formation.
- The 2% PVP-Mn-CdS catalyst exhibited 98% efficiency in degrading Methylene Blue dye within 2 hours under visible light and maintained high efficiency over three reuse cycles.
Conclusions:
- PVP-assisted Mn-CdS nanoparticles, particularly the 2% PVP-Mn-CdS composition, are highly effective for photocatalytic dye degradation.
- The enhanced morphology and reduced bandgap contribute to the superior performance of the 2% PVP-Mn-CdS catalyst.
- This material shows significant potential as a promising candidate for wastewater remediation and dye removal applications.
