tailieunhanh - Báo cáo hóa học: "Sulfur Nanoparticles Synthesis and Characterization from H2S Gas, Using Novel Biodegradable Iron Chelates in W/O Microemulsion"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Sulfur Nanoparticles Synthesis and Characterization from H2S Gas, Using Novel Biodegradable Iron Chelates in W/O Microemulsion | Nanoscale Res Lett 2008 3 221-229 DOI s11671-008-9140-6 NANO EXPRESS Sulfur Nanoparticles Synthesis and Characterization from H2S Gas Using Novel Biodegradable Iron Chelates in W O Microemulsion Aniruddha S. Deshpande Ramdas B. Khomane Bhalchandra K. Vaidya Renuka M. Joshi Arti S. Harle Bhaskar D. Kulkarni Received 4 February 2008 Accepted 4 June 2008 to the authors 2008 Abstract Sulfur nanoparticles were synthesized from hazardous H2S gas using novel biodegradable iron chelates in w o microemulsion system. Fe3 -malic acid chelate 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 a-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 A. S. Deshpande R. B. Khomane B. K. Vaidya R. M. Joshi B. D. Kulkarni El Chemical Engineering Process Development Division National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India e-mail A. S. Deshpande e-mail aniruddhadesh@ A. S. Harle Center for Material Characterization Division National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India against bacteria yeast and fungi .