01980nas a2200205   4500008004100000022001400041245014100055210006900196260011000265300001600375490000600391520111700397100002701514700002301541700001901564700001601583700002201599700002601621856012701647       2014                        eng d  a2046-206900aGreen synthesis of polysaccharide stabilized gold nanoparticles: chemo catalytic and room temperature operable vapor sensing application0 aGreen synthesis of polysaccharide stabilized gold nanoparticles   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a24014-240190 v43 a<p>A facile, one pot, completely green, and cheap route for the synthesis of gold nanoparticles (AuNPs) has been developed by using locust bean gum (LBG), both as a reducing and a stabilizing agent. Synthesized AuNPs were characterized by UV-vis spectroscopy, TEM, XRD, dynamic light scattering analysis (DLS) and EDAX. A characteristic surface plasmon peak at 537 nm confirmed the formation of AuNPs. Synthesized AuNPs were found to be an efficient catalyst for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The reaction follows pseudo-first order kinetics with a rate constant of 14.46 X 10(-2) min(-1). Furthermore, the catalytic efficiency of AuNPs for ethanol vapor sensing was investigated by doping AuNPs in a tin oxide (SnO2) matrix synthesized by a single step thermal decomposition method. The AuNPs doped SnO2 sensor showed a fast response (similar to 5 seconds) and excellent ethanol sensing behavior in the range of 10 to 120 ppm at room temperature. A two fold increase in ethanol vapor sensing response was observed with AuNPs doped SnO2 as compared with the pure SnO2 sensor.</p>1 aTagad, Chandrakant, K.1 aRajdeo, Kishor, S.1 aKulkarni, Atul1 aMore, Pooja1 aAiyer, Rohini, C.1 aSabharwal, Sushma, G.  uhttps://library.ncl.res.in/content/green-synthesis-polysaccharide-stabilized-gold-nanoparticles-chemo-catalytic-and-room-0