Structural and Photocatalytic Studies on Oxygen Hyperstoichiometric Titanium-Substituted Strontium Ferrite Nanoparticles
نویسندگان
چکیده
Doping of ferrites is an important domain research for their application as photocatalysts. In the present work, effect Ti4+ substitution on structural and photocatalytic properties strontium ferrite nanoparticles (NPs) studied. Ternary doped Sr1?xTixFe2O4+? NPs (x = 0.0–1.0) were synthesized by sol–gel methodology. Tetravalent ions caused oxygen hyperstoichiometry enhancement in surface area from 44.3 m2/g SrFe2O4 to 77.6 Sr0.4Ti0.6Fe2O4+? NPs. The average diameter ranged between 25–35 nm revealed TEM analysis. presence two sextets Mössbauer spectrum pristine Ti4+-substituted a paramagnetic doublet TiFe2O5 confirmed phase purity. potential pure was studied using nitroaromatic compounds, viz. pendimethalin, p-nitrophenol Martius yellow, model pollutants. Doped with composition showed highest degradation efficiency ranging 87.2% 94.4%. increased ascribed lowering band gap (Eg) 2.45 eV 2.18 eV, fourfold decrease photoluminescence intensity, charge carrier concentration (4.90 × 1015 cm?3 6.96 cm?3), decreased barrier height 1.20 1.02 eV. O2?? radicals appeared be main reactive species involved photodegradation. apparent rate constant values Langmuir–Hinshelwood kinetic 1.9 10?2 min?1, 2.3 min?1 1.3 p-nitrophenol, pendimethalin respectively. Thus, tuning content proved effective strategy improving
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ژورنال
عنوان ژورنال: Magnetochemistry
سال: 2022
ISSN: ['2312-7481']
DOI: https://doi.org/10.3390/magnetochemistry8100120