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Structural, magnetic, and photocatalytic properties of core–shell reversal nanocomposites of titanium-doped strontium ferrite and silica

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  • FOCUS ISSUE: Mössbauer Spectroscopy from Artificial Nano Architectures to Environmental Applications
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Abstract

This paper presents the effect of core–shell reversal on the photocatalytic potential of titanium-doped strontium ferrite (Sr0.4Ti0.6Fe2O4.6) and silica (SiO2) nanocomposites. The construction of core–shell-structured Z-scheme systems is a valid strategy to effectively enhance photocatalytic activity. Mӧssbauer spectroscopy studies demonstrated the more lowering of hyperfine field values for SiO2@Sr0.4Ti0.6Fe2O4.6 compared to Sr0.4Ti0.6Fe2O4.6@SiO2 core–shell nanocomposite. The Sr0.4Ti0.6Fe2O4.6@SiO2 nanocomposite had higher BET-specific surface area of 117.3 m2/g than that of SiO2@Sr0.4Ti0.6Fe2O4.6 (106.9 m2/g). The Sr0.4Ti0.6Fe2O4.6@SiO2 exhibited higher photocatalytic activity than SiO2@Sr0.4Ti0.6Fe2O4.6 for the degradation of model pesticide, pendimethalin (\(\sim\) 96%). It was ascribed to the narrowing of bandgap, high surface area, and decrease in the photoluminescence intensity. A Z-scheme photocatalytic degradation mechanism for pendimethalin over Sr0.4Ti0.6Fe2O4.6@SiO2 nanocomposite was proposed. The results indicate that the designing of core–shell structures can play a significant role in improving the photocatalysts.

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Authors and Affiliations

  1. Department of Chemistry, Punjab Agricultural University, Ludhiana, Punjab, 141001, India

    Jaspreet Kaur Grewal, Manpreet Kaur & Manpreet Kaur Ubhi

  2. Institute of Physics, University of Brasília, Brasília, 70910-900, Brazil

    Aderbal C. Oliveira & Vijayendra Kumar Garg

  3. Program for Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University (TAMU), College Station, TX, 77843-1266, USA

    Virender K. Sharma

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Contributions

JKG: Data curation, Methodology, Writing—Original draft, Writing—review and editing. MK: Writing—Original draft, Writing—review and editing, Supervision. MKU: Validation, formal analysis and editing. ACO: Mӧssbauer studies, Validation, formal analysis and editing. VKG: Mӧssbauer studies, Validation, formal analysis and editing. VKS: Writing—review and editing, Supervision.

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Correspondence to Manpreet Kaur or Virender K. Sharma.

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Grewal, J.K., Kaur, M., Ubhi, M.K. et al. Structural, magnetic, and photocatalytic properties of core–shell reversal nanocomposites of titanium-doped strontium ferrite and silica. Journal of Materials Research 38, 1019–1034 (2023). https://doi.org/10.1557/s43578-022-00855-0

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