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Photocatalytic Study of Mo/N co-doped Titanium Dioxide (TiO2) Nanoparticles Under Visible Light Irradiation

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Title Photocatalytic Study of Mo/N co-doped Titanium Dioxide (TiO2) Nanoparticles Under Visible Light Irradiation
 
Creator Rani, Anju
Kumar, Suresh
Dhiman, R L
Singh, Virender
Kumar, Suresh
 
Subject Nanoparticles
codoped TiO2
Photocatalytic degradation of organic dyes
 
Description 509-520
Undoped TiO2 and Mo/N co-doped TiO2 nanoparticles have been fabricated by sol gel technique. The average particle
size of nanoparticles was calculated from the line broadening of (101) peak of XRD pattern and further verified by High
Resolution Transmission Electron Microscopy (HRTEM) are in good agreement. The decrease in particle size 28.5 to
15.0 nm was observed with increase of molybdenum concentration. The surface morphology of all samples was studied by
Field Emission Scanning Electron Microscopy shows small agglomeration. The optical band gap energy was calculated
using UV-visible absorption spectroscopy and found to decrease in increase of doping concentration. The presence of defect
levels caused by oxygen vacancies has been confirmed by Photoluminescence spectra. The emission bands observed at
453.9, 470.6, 485.7, 495.8 and 535 nm could be arising from surface states. The phase composition and elemental analysis
of synthesized samples was estimated from Energy dispersive X-ray spectroscopy. The effect of doping concentration on
structural formation was studied by FTIR spectroscopy. The Photocatalytic activity of synthesized samples for degradation
of Congo red (CR) and Methyl orange (MO) dyes as standard pollutants was investigated under visible light source. The
increase in doping concentration causes enhance in photocatalytic activity of the synthesized nanoparticles which is
attributed from the decrease in electron-hole pair recombination rates. The degradation efficiency against congo red dye is
very high compared to methyl orange dye. These observations suggest that co-doped synthesized nanoparticles are suitable
for complete degradation of congo red dye and are not able to degrade methyl orange dye.
 
Date 2022-06-10T06:39:52Z
2022-06-10T06:39:52Z
2022-06
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/59878
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.60(06) [June 2022]