Role of Citric Acid/Glycine-Reinforced Nanometal Oxide for the Enhancement of Physio-chemical Specifications in Catalyti
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ORIGINAL PAPER
Role of Citric Acid/Glycine-Reinforced Nanometal Oxide for the Enhancement of Physio-chemical Specifications in Catalytic Properties S. Mangala Devi 1 & A. Nivetha 1 & I. Prabha 1 Received: 20 March 2020 / Accepted: 15 July 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The present study has focused the synthesis of Fe3O4–ZnO and citric acid/glycine-modified Fe3O4–ZnO nanocomposites by coprecipitation followed by sol–gel method. The structural elucidation of modified Fe3O4-ZnO nanocomposites has revealed by XRD, SEM-EDX, FT-IR, and UV-Vis spectrophotometer studies. The analytical studies have revealed that the average crystallite size found to be 10–47 nm with spherical shape on smooth surface. The band gap energy range has found to be 1.52 to 3.12 eV. The catalytic activity of synthesized nanocomposites has undergone the oxidation of benzaldehyde, and the antibacterial activity has done using gram-negative bacteria Escherichia coli. The experimental results have concluded that the citric acid–iron oxide nanocomposite has showed the higher yield in oxidation reaction and the citric acid–iron oxide nanocomposite has showed higher efficiency in antibacterial activity comparatively. Keywords Nanocomposite . Modifiers . Band gap energy . Oxidation . Benzaldehyde
1 Introduction Nanomaterials have played an important role in nanomedicine and nanobiotechnology in terms of new approach to antibiotic-resistance microbes [1, 2]. The materials, which are in nanoscale, have gone through bacterial cells and made oxygen radicals to damage cell membranes of bacteria to produce an efficient way for the retardation of bacterial growth [3, 4]. Among the science researchers, spinel ferrite nanoparticles have produced great impact and broad applications in magnetic resonance imaging, magnetic storage, electronic devices, and magnetic drug delivery [5]. Magnetic nanoparticles have used to fabricate the catalysts, in which the catalytically active molecules are made with solid support of magnetic nanoparticles and the resulted catalysts have categorized as heterogeneous catalysts [6–8]. Among the various magnetic nanoparticles, the most widely used is magnetite (Fe3O4) for the * I. Prabha [email protected] S. Mangala Devi [email protected] 1
Department of Chemistry, Bharathiar University, Coimbatore 641 046, India
preparation of heterogeneous catalysts due to the reasons of low cost, easy method, low toxicity, and biocompatibility [9]. Magnetic Fe3O4 nanoparticle has exhibited cubic inverse spinel structure to attract the thought of researchers because of usage in various areas such as bio-separation, magnetic resonance imaging (MRI), mineral separation, ability to heat transfer, efficient hyperthermia for cancer therapy, bio-sensors, dynamic sealing, orientation control, and directional transportation. The applications of composite materials have showed constant advancement and led all the new marketing. Several studies have shown the fabrication of nanocomposites for its un
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