Browsing by Author "Prakash, T"

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    CAMELLIA SINENSIS ASSISTED GREEN SYNTHESIS OF METAL OXIDE NANOPARTICLES: INVESTIGATION OF STRUCTURAL, VIBRATIONAL, MORPHOLOGICAL AND THERMAL ANALYSIS
    (2024-06) Sathyapriya, R; Nilofur Fathima, S J; Arun Paul, C; Prakash, T; Ranjith Kumar, E; Arunadevi, Natarajan
    Metal oxide nanoparticles were created via a green combustion approach, with natural tea extract and metal nitrates as the key starting components. The X-ray diffraction (XRD) spectra were used to determine the phase of CuO, NiO, and Co3O4 nanoparticles. The findings validate the monoclinic and cubic structures of CuO, NiO, and Co3O4 nanoparticles. The X-ray diffraction (XRD) profiles of CuO, NiO, and Co3O4 nanoparticles show crystallite sizes of 25.2, 31.2, and 32.5 nm, respectively. Metal oxide nanoparticles exhibit approximately equal average crystallite diameters, demonstrating the consistency of the synthesis procedure. The FTIR spectra were utilized to investigate the functional groups and other chemical components present in CuO, NiO, and Co3O4 nanoparticles. FESEM investigation revealed a leaf-like surface morphology in CuO nanoparticles. The EDX spectra confirm the presence of metals and oxygen in the produced metal oxide nanoparticles. The study focused on the thermal stability and weight loss % of metal oxide nanoparticles. Metal oxide nanoparticles synthesized from natural tea have been shown to have good thermal stability.
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    SYNTHESIS AND CHARACTERIZATION OF CO3O4, CUO AND NIO AND NANOPARTICLES: EVALUATION OF STRUCTURAL, VIBRATIONAL, MORPHOLOGY AND THERMAL PROPERTIES (Note)
    (Elsevier, 2024-04) Varunamugi, R; Metha K, Mathu; Paul C, Arun; Sathyaseelan, T; Sathiyaraj, S; Prakash, T; Poonguzhali R, Vandamar; Kumar E, Ranjith; Natarajan, Arunadevi
    Green synthesis of CuO, NiO, and Co3O4 nanoparticles used biowaste (Gomutra). The physicochemical properties of metal oxide nanoparticles have been studied using various methods. Green synthesised metal oxide nanoparticle crystal properties were calculated using X-ray diffraction. It shows that all metal oxide crystallite sizes are nanoscale (27–31 nm). XRD spectra of CuO nanoparticles confirm their monoclinic structure, which matches JCPDS data. FTIR spectra reveal the existence of functional groups and associated vibrational modes in NiO and Co3O4 nanoparticles, confirming a cubic crystal structure with lattice parameters of 4.175 Å and 8.054 The surface appearance and particle size of three metal oxide nanoparticles were examined by SEM and TEM. XRD matches the average particle sizes of three metal oxide nanoparticles, which are 33–40 nm. Thermal stability of synthesized metal oxide nanoparticles was measured from 0 to 1000 °C using TG-DTA. It shows that the nanoparticles are stable and suited for various applications. Their unique properties make these metal oxide nanoparticles excellent for gas detection, antibacterial activity, photocatalysis, and biosensing.