Identification of Fe 3+ co-doped zinc titanate mesostructures using dielectric and antimicrobial activities
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ORIGINAL PAPER
Identification of Fe3+ co‑doped zinc titanate mesostructures using dielectric and antimicrobial activities A. M. El Nahrawy1 · A. M. Bakr2 · B. A. Hemdan3 · A. B. Abou Hammad1 Received: 14 February 2020 / Revised: 19 May 2020 / Accepted: 26 May 2020 © Islamic Azad University (IAU) 2020
Abstract Mesostructures Fe2O3 co-doped zinc titanate was excellently produced through the solgel method. The phase structure of zinc titanate transfers from a rhombohedral perovskite structure (ZnTiO3) to a cubic spinel structure (Zn2TiO4) with the incorporation of iron ions (Fe3+). Its high values characterize the dielectric constant decreases through the frequency range and the loss tangent at low frequency. Cole–Cole spectra reveal two semicircles that represent two relaxations processes in the samples. The antimicrobial properties for all tested nanosized particles against Gram-negative, Gram-positive bacteria, Candida albicans as an example for yeast and Aspergillus niger as an example for mold were evaluated. The results showed that 15 Fe2O3–zinc titanate was the most potent biocide, followed by 10 Fe2O3–zinc titanates and 5 Fe2O3–zinc titanate. In regards to the MIC values of 15Fe–Zn titanate against explored pathogenic microbes were for 45 min for E.coli, 30 min for S. entercia, and 60 min for the Gram-positive and fungal species. Hence, the results acquired suggested that 15Fe–Zn titanate nanopowder could be used for biomedical applications such as wounds and burns healing. Keywords Dielectric properties · Perovskite · ZnTiO3 structures · Antimicrobial activities · Biomedical applications
Introduction Research on perovskite nanocrystals has been extended exceedingly owing to their innovative electrical, optical, gas sensors, and catalytic properties over the two last decades (Ning et al. 2017; Wattanawikkam et al. 2019). The unique structural, dielectric, and optical properties are consequent from the quantum detention effects in the nanoscale (Wang et al. 2010b). Essentially, the advances in the positive chemical formation of highly stable and modified perovskite nanocrystals allow their expanded applications in various Editorial responsibility: J Aravind. * A. B. Abou Hammad [email protected] 1
Solid State Physics Department, Physics Research Division, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
2
Spectroscopy Department, Physics Research Division, National Research Centre, 33 El‑Bohouth St., Dokki, Giza 12622, Egypt
3
Water Pollution Research Department, Environmental Research Division, National Research Centre, 33 El‑Bohouth St., Dokki, Giza 12622, Egypt
industrial fields (Raveendra et al. 2014; Reddy et al. 2018). Perovskite/ferrite nanostructures are appealing due to their prospective application as in magnetoelectric materials, integrated filters, wireless and mobile communication, and tunable microwave devices (Li et al. 2012; Zhang et al. 2015; Zheng et al. 2015; Ji et al. 2018). Modified zinc titanate matrices, with lower sintering temperat
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