Gnidia glauca flower extract mediated synthesis of gold nanoparticles and evaluation of its chemocatalytic potential

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• 作者：Sougata Ghosh (1)
  Sumersing Patil (1)
  Mehul Ahire (1)
  Rohini Kitture (2)
  Deepanjali D Gurav (3)
  Amit M Jabgunde (3)
  Sangeeta Kale (4)
  Karishma Pardesi (5)
  Vaishali Shinde (3)
  Jayesh Bellare (6)
  Dilip D Dhavale (3)
  Balu A Chopade (1)
  
• 关键词：Gnidia glauca ; Gold nanoparticles ; UV ; Visible spectroscopy ; Transmission electron microscopy ; High resolution transmission electron microscopy ; Elemental mapping ; Energy dispersive spectroscopy ; Dynamic light scattering ; X ; ray diffraction ; Chemocatalysis
• 刊名：Journal of Nanobiotechnology
• 出版年：2012
• 出版时间：December 2012
• 年：2012
• 卷：10
• 期：1
• 全文大小：565KB
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• 作者单位：Sougata Ghosh (1)
  Sumersing Patil (1)
  Mehul Ahire (1)
  Rohini Kitture (2)
  Deepanjali D Gurav (3)
  Amit M Jabgunde (3)
  Sangeeta Kale (4)
  Karishma Pardesi (5)
  Vaishali Shinde (3)
  Jayesh Bellare (6)
  Dilip D Dhavale (3)
  Balu A Chopade (1)
  
  1. Institute of Bioinformatics and Biotechnology, University of Pune, Pune, 411007, India
  2. Department of Electronic Science, Fergusson College, Pune, 411004, India
  3. Department of Chemistry, Garware Research Centre, University of Pune, Pune, 411007, India
  4. Department of Applied Physics, Defense Institute of Advanced Technology, Girinagar, Pune, 411025, India
  5. Department of Microbiology, University of Pune, Pune, 411007, India
  6. Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai, 400076, India
  
• ISSN：1477-3155

文摘

Background Novel approaches for synthesis of gold nanoparticles (AuNPs) are of utmost importance owing to its immense applications in diverse fields including catalysis, optics, medical diagnostics and therapeutics. We report on synthesis of AuNPs using Gnidia glauca flower extract (GGFE), its detailed characterization and evaluation of its chemocatalytic potential. Results Synthesis of AuNPs using GGFE was monitored by UV-Vis spectroscopy and was found to be rapid that completed within 20?min. The concentration of chloroauric acid and temperature was optimized to be 0.7?mM and 50°C respectively. Bioreduced nanoparticles varied in morphology from nanotriangles to nanohexagons majority being spherical. AuNPs were characterized employing transmission electron microscopy, high resolution transmission electron microscopy. Confirmation of elemental gold was carried out by elemental mapping in scanning transmission electron microscopic mode, energy dispersive spectroscopy and X-ray diffraction studies. Spherical particles of size ~10?nm were found in majority. However, particles of larger dimensions were in range between 50-150?nm. The bioreduced AuNPs exhibited remarkable catalytic properties in a reduction reaction of 4-nitrophenol to 4-aminophenol by NaBH4 in aqueous phase. Conclusion The elaborate experimental evidences support that GGFE can provide an environmentally benign rapid route for synthesis of AuNPs that can be applied for various purposes. Biogenic AuNPs synthesized using GGFE exhibited excellent chemocatalytic potential.