Sulfur Nanoparticles Synthesis and Characterization from H2S Gas, Using Novel Biodegradable Iron Chelates in W/O Microemulsion |
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Authors: | Aniruddha S Deshpande Ramdas B Khomane Bhalchandra K Vaidya Renuka M Joshi Arti S Harle Bhaskar D Kulkarni |
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Affiliation: | (1) Chemical Engineering & Process Development Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India;(2) Center for Material Characterization Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India |
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Abstract: | Sulfur nanoparticles were synthesized from hazardous H2S gas using novel biodegradable iron chelates in w/o microemulsion system. Fe3+–malic acid chelate (0.05 M aqueous solution) was studied in w/o microemulsion containing cyclohexane, Triton X-100 and n-hexanol as oil phase, surfactant, co-surfactant, respectively, for catalytic oxidation of H2S gas at ambient conditions of temperature, pressure, and neutral pH. The structural features of sulfur nanoparticles have
been characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive spectroscopy (EDS),
diffused reflectance infra-red Fourier transform technique, and BET surface area measurements. XRD analysis indicates the
presence of α-sulfur. TEM analysis shows that the morphology of sulfur nanoparticles synthesized in w/o microemulsion system
is nearly uniform in size (average particle size 10 nm) and narrow particle size distribution (in range of 5–15 nm) as compared
to that in aqueous surfactant systems. The EDS analysis indicated high purity of sulfur (>99%). Moreover, sulfur nanoparticles
synthesized in w/o microemulsion system exhibit higher antimicrobial activity (against bacteria, yeast, and fungi) than that
of colloidal sulfur. |
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Keywords: | Sulfur nanoparticles H2S gas Iron chelates W/O microemulsion Antimicrobial activity |
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