Facile one step synthesis of novel TiO2 nanocoral by sol–gel method using Aloe vera plant extract

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• 作者：K. S. Venkatesh ; S. R. Krishnamoorthi ; N. S. Palani…
• 关键词：Aloe vera ; TiO2 nanocorals ; X ; ray diffraction ; Raman spectroscopy ; Electron microscopy ; 81.16.Ta ; 77.84.Bw ; 61.05.cp ; 78.30.Am ; 78.30.Fs ; 68.37.Hk ; 68.37.Lp
• 刊名：Indian Journal of Physics
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：89
• 期：5
• 页码：445-452
• 全文大小：1,808 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  Astronomy, Astrophysics and Cosmology
  Physics
  
• 出版者：Springer India
• ISSN：0974-9845

文摘

Titanium oxide (TiO2) nanoparticles (NPs) were synthesized by sol gel method using Aloe vera plant extract as a biological capping agent and a cauliflower-nanocoral morphology was observed in this technique. The assynthesized TiO2 nanopowder was calcined at a range of temperatures (300-00?°C) for 1?h. The influence of A. vera plant extract on the thermal, structural and morphological properties of TiO2 nanopowder was evaluated. Thermogravimetric analysis/differential thermal analysis was employed to study the thermal properties of the assynthesized TiO2 nanopowder. The crystallinity, phase transformation and the crystallite size of the calcined samples were studied by X-ray diffraction technique. XRD result confirmed the presence of TiO2 with anatase phase. FT Raman spectra showed the Raman active modes pertaining to the TiO2 anatase phase and Raman band shift was also observed with respect to particle size variation. The different functional group vibrations of as dried pure A. vera plant extract were compared with the mixture of TiO2 and A. vera plant extract by FT-IR analysis. The scanning electron microscopy images apparently showed the formation of spherical shaped NPs and also it demonstrated the effect of A. vera plant extract on the reduction of particles size. The surface area of the TiO2 NPs was measured through Brunauer–Emmett–Teller analysis. Transmission electron microscopy images ascertained that the spherical shaped TiO2 NPs were formed with cauliflower-nanocoral morphology decorated with nanopolyps with the size range between 15 and 30?nm.