Extracellular synthesis of mycogenic silver nanoparticles by Cylindrocladium floridanum and its homogeneous catalytic degradation of 4-nitrophenol

Title
Extracellular synthesis of mycogenic silver nanoparticles by Cylindrocladium floridanum and its homogeneous catalytic degradation of 4-nitrophenol
Author(s)
박현호베드리칸난나타라얀[나타라얀]
Keywords
P-NITROPHENOL DEGRADATION; RECYCLABLE CATALYSTS; FUSARIUM-OXYSPORUM; BIOSYNTHESIS; ADSORPTION; OXIDATION; CLUSTERS; FUNGUS; REDUCTION; KINETICS
Issue Date
201312
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, v.116, pp.485 - 490
Abstract
Green synthesis of extracellular mycogenic silver nanoparticles using the fungus, Cylindrocladium floridanum is reported. The synthesized mycogenic silver nanoparticles were characterized using UV-Vis absorption spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM) techniques. The nanoparticles exhibit fcc structure with Bragg's reflections of (1 1 1), (2 0 0), (2 2 0) and (3 1 1) was evidenced by XRD pattern, high-resolution TEM lattice fringes and circular rings in selected-area electron diffraction (SAED) pattern. The morphology of nanoparticles was roughly spherical in shape with an average size of ca. 25 nm. From FTIR spectrum, it was found that the biomolecules with amide I and II band were involved in the stabilization of nanoparticles. These mycogenic silver nanoparticles exhibited the homogeneous catalytic potential in the reduction of pollutant, 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using sodium borohydride, which followed a pseudo-first-order kinetic model. Thus, the synthesis of metal nanoparticles using sustainable microbial approach opens up possibilities in the usage of mycogenic metal nanoparticles as catalysts in various chemical reactions. (C) 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28252http://dx.doi.org/10.1016/j.saa.2013.07.066
ISSN
1386-1425
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이과대학 > 화학생화학부 > Articles
공과대학 > 화학공학부 > Articles
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