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SYNTHESIS AND CHARACTERIZATION OF NANOSIZED Mg(OH)2 AND ITS NANOCOMPOSITE WITH POLY (VINYL ALCOHOL)
R. ANBARASAN,M. FATHIMA PARVEEN,S. UMAPATHY,V. DHANALAKSHMI 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.3
Nano-Mg(OH)2 was synthesized by co-precipitation method. Peaks between 500 and 1250 cm-1 in FTIR spectroscopy confirmed the presence of metal hydroxide stretching. TGA inferred that above 600°C, 50% of residue weight remained. HRTEM of nanocomposite gave an idea about the nonspherical morphology of particles of size 25 nm to 30 nm. SEM inferred that flower-like morphology for pristine Mg(OH)2 and higher % weight of aniline-intercalated Mg(OH)2 had agglomerated structure. UV visible spectrum inferred the presence of Mg2+ ion at 275 nm and the presence of amino-group-intercalated Mg(OH)2, which had a sharp peak at 193 nm and the intensity of which increases with the increase in % weight of aniline. PL inferred that aniline-intercalated Mg(OH)2 showed a lower intensity of which increased with higher wavelength value than the pristine and nanocomposite with PVA.
Sehar Mahalakshmi,Thangevel Alagesan,Vellaichamy Parthasarathy,Ramasamy Anbarasan 한국고분자학회 2019 Macromolecular Research Vol.27 No.4
The molybdenum thioglycolate (Mo-TG) end capped poly(ε-caprolactone) (PCL) was prepared in the presence of novel Mo-TG nanohybrid initiator by ring opening polymerization (ROP) technique. The structural analysis was carried out by FTIR, 1H and 13C NMR techniques for the synthesized PCL. The particle size of the end capped Mo-TG nano hybrid in the PCL matrix was analysed by HRTEM. The morphology, surface roughness and average surface roughness of the polymer sample were investigated by AFM. The geometry of the nucleated crystals of PCL was examined using polarized optical microscopy (POM). The crystallization and thermal history of the sample under non-isothermal condition were assessed by DSC and TGA. The morphology of the nucleated crystals was analysed theoretically with the help of kinetic models for Mo-TG end capped PCL under non-isothermal crystallization condition. The kinetic parameters associated with crystallization and degradation processes of PCL were also determined using various kinetic models.
Chung, Ill-Min,Abdul Rahuman, Abdul,Marimuthu, Sampath,Kirthi, Arivarasan Vishnu,Anbarasan, Karunanithi,Padmini, Parthasarathy,Rajakumar, Govindasamy D.A. Spandidos 2017 Experimental and therapeutic medicine Vol.14 No.1
<P>The present study outlines the development of a method to synthesize copper nanoparticles (CuNPs) by mixing copper acetate solution with leaf extract of <I>Eclipta prostrata</I> without using any surfactant or external energy. <I>E. prostrata</I> leaf extract function as an excellent reducing agent of copper ions, and the biosynthesized CuNPs are safer for the environment. The powder X-ray diffraction (XRD) pattern provided evidence for the formation of face-centered cubic structure ranging from 23 to 57 nm, with an average size of 31±1.2 nm. Fourier transform infrared spectroscopy (FTIR) was used to identify the biomolecules and capping reagents in the <I>E. prostrata</I> leaf extract that may be responsible for the reduction of copper ions and the stability of the bioreduced nanoparticles. The biosynthesized CuNPs displayed considerable antioxidant capacity. Similarly, <I>in vitro</I> anticancer studies demonstrated the cytotoxicity value of synthesized CuNPs against tested HepG2 cells. The findings of the present study suggested that biosynthesized CuNPs that utilize extracts of <I>E. prostrata</I> may be used for therapeutic application, and thus are a promising nanomaterial.</P>
S. Shanavas,A. Priyadharsan,E.I. Gkanas,R. Acevedo,P.M. Anbarasan 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-
The photoexcited charge carriers trapping was an effective way to generate a large number of activespecies like O2 and OH radicals to oxidize pharmaceutical molecules. In ternary Cu/Bi2Ti2O7/rGOcomposite Cu nanoparticles and rGO sheets act as charge carrier trappers and the suppression of e -h+pair recombination was confirmed by Photoluminescence analysis. The Cu/Bi2Ti2O7/rGO compositeexhibited higher photocatalytic degradation efficiency for degradation of ibuprofen and tetracyclinemolecules under visible light irradiation within 90 min. Therefore, this research designates a promisingstrategy for higher photoexcited charge carrier trapping photocatalyst design for efficient degradation ofpharmaceutical molecules.