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Updated: Feb 14, 2026
07:24
Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
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Highly Efficient Visible-Light-Driven Graphene-CdS Nanocomposite Photocatalysts
Qian Zhao1, Ruifeng Liu1, Yalong Shen1
1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
Journal of Nanoscience and Nanotechnology
|February 15, 2018
Summary
Graphene-cadmium sulfide (CdS) composites efficiently degrade methylene blue (MB) under visible light. The best-performing composite demonstrated excellent stability, with hydroxyl (˙OH) radicals playing a key role in the photodegradation mechanism.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Methylene blue (MB) is a common pollutant.
- Photodegradation is a promising method for pollutant removal.
- Graphene-CdS nanocomposites offer enhanced photocatalytic properties.
Purpose of the Study:
- To synthesize graphene-CdS nanocomposites.
- To evaluate their efficiency in methylene blue photodegradation.
- To elucidate the photodegradation mechanism.
Main Methods:
- Solvothermal synthesis of graphene-CdS nanocomposites with varying CdS content.
- Photodegradation experiments using methylene blue under visible light.
- Transmission Electron Microscopy (TEM) for morphological analysis.
- Dimethyl sulfoxide (DMSO) addition to probe the reaction mechanism.
Main Results:
- Graphene-CdS composites showed higher photodegradation efficiency than pure CdS.
- Optimal CdS distribution and highest efficiency were observed in the graphene-CdS composite (1 g/7.5 mmol).
- The composite exhibited good stability during the photodegradation process.
Conclusions:
- Graphene-CdS nanocomposites are effective photocatalysts for MB degradation under visible light.
- The composite (1 g/7.5 mmol) shows superior performance and stability.
- Hydroxyl (˙OH) radicals are crucial intermediates in the photodegradation pathway.
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