Balasundaram, O N and Jeevanantham, N (2018) High-performance visible light photocatalytic activity of cobalt (Co) doped CdS nanoparticles by wet chemical route. Journal of the Iranian Chemical Society.

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Abstract

The role of cobalt (Co) dopant on structural, morphological, optical and photocatalytic properties of CdS nanoparticles
were methodically reported. XRD analysis confirms that both pure and Co-doped CdS samples have cubic structure with no
impurity phases detected and the results are good in agreement with the standard JCPDS value (Card No. 80-0019). TEM
images reveal the spherical morphology with an average diameter of around 15–35 nm. A noticeable red-shift of absorption
edge and bandgap narrowing can be attributed to the inclusion of cobalt ions and creation of defect levels in the bandgap,
which is confirmed by UV analysis. Photoluminescence spectra show defects-free nature of synthesized nanoparticles.
The functional groups and chemical interaction were determined by FTIR spectra. The photodegradation of MB dye with
Co-doped CdS is more efficient under visible light compared to pure CdS. The 15 mol% Co-doped CdS acts as an efficient
photocatalyst. The presence of Co2+ generated electron and holes and prolonged the recombination rate by introducing the
temporary trapping sites, which essentially causes to improve the photocatalytic efficiency of the synthesized samples. The
possible photocatalytic mechanism by Co doping is also discussed in detail

Item Type: Article
Uncontrolled Keywords: CdS · Co doping · Methylene blue · Optical property · Visible light · Catalyst
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Mr Team Mosys
Date Deposited: 16 Aug 2022 06:08
Last Modified: 16 Aug 2022 06:08
URI: http://ir.psgcas.ac.in/id/eprint/1467

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