CdS-Titania nanocomposite: An improved visible active photocatalyst for dye degradation

Photocatalysis is emerged as a feasible solution for addressing the issues related to green energy production and sustainable environment. Among various reported photocatalysts, Titania is one of the widely used one due to its high stability, and low cost. However, its wide band gap and poor charge...

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Bibliographic Details
Published in:Journal of physics. Conference series 2024-12, Vol.2919 (1), p.12005
Main Authors: Banerjee, Nisha, Nair, Ranjith G
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Anatase
Charge transfer
Clean energy
Current carriers
Diffraction patterns
Disintegration
Doppler effect
Electrochemical analysis
Electromagnetic absorption
Heterojunctions
Impact analysis
Light irradiation
Microspheres
Nanocomposites
Optical properties
Particulates
Pattern analysis
Performance enhancement
Photocatalysis
Photon absorption
Photons
Red shift
Separation
Synthesis
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Summary:Photocatalysis is emerged as a feasible solution for addressing the issues related to green energy production and sustainable environment. Among various reported photocatalysts, Titania is one of the widely used one due to its high stability, and low cost. However, its wide band gap and poor charge separation limits its photocatalytic performance in the UV region only. Coupling of Titania with suitable visible active semiconductor is a proven strategy to improve the performance. In this context, CdS-Titania (Anatase) nanocomposite has been synthesized via facile hydrothermal route and its impact on photon absorption and carrier separation efficiency were studied. The synthesized samples were characterized through various structural, optical and electrochemical analysis. X-ray diffraction pattern confirms the formation of CdS-Titania (Anatase) composite and its physicochemical properties. FE-SEM confirms the disintegration of CdS microspheres into smaller agglomerated particulates. The absorption spectroscopy confirms that induction of CdS improves the visible light absorption capacity. The composite consisting CdS-Titania (Anatase) (CdSA) shows the maximum red shift in the visible range. The low charge transfer resistance of composite observed in EIS analyses further confirms the proper separation of charge carriers at junction. The photocatalytic degradation performance under visible light irradiation was performed and found that the nanocomposite performs better than the pristine Anatase and CdS. CdSA has been found to have superior photocatalytic ability. It shows 43 times and 1.52 times better performance than pristine Titania and CdS respectively. This can be attributed to the enhanced visible photon absorption achieved through the successful formation of heterojunction. This opens up a new area of research for improving the performance of pristine Titania.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2919/1/012005