01647nas a2200241   4500008004100000022001400041245008000055210006900135260006900204300001200273490000800285520084200293653001401135653001001149653001701159653001101176653001401187100002801201700002401229700001801253700002201271856011201293       2008                        eng d  a0254-058400aFe-doped SnO(2) nanomaterial: a low temperature hydrogen sulfide gas sensor0 aFedoped SnO2 nanomaterial a low temperature hydrogen sulfide gas  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUN  a230-2340 v1093 a<p>The effect of Fe-doping on the surface chemistry and gas-sensing properties of nanocrystalline tin oxide is analyzed. The pristine and Fe-doped SnO(2) are synthesized by the modified Pechini citrate route that produces around 40 and 18 nm sized nanoparticles, respectively. 1 at.% Fe-doped SnO(2) shows significantly high selectivity towards hydrogen sulfide gas with capability to detect even 10 ppm of hydrogen sulfide at room temperature, with change of about one order of magnitude in the resistance within 5-15 s. In comparison, pristine SnO(2) shows negligible response towards H(2)S at room temperature. The ideal response and recovery of Fe-doped SnO(2) at low concentration of gas suggests Fe-doped SnO(2) nanomaterial as a potential low cost, low temperature H(2)S gas sensor. (C) 2007 Elsevier B.V. All rights reserved.</p>10aFe-doping10aH(2)S10ananomaterial10aSensor10atin oxide1 aVaishampayan, Mukta, V.1 aDeshmukh, Rupah, G.1 aWalke, Pravin1 aMulla, Imtiaz, S.  uhttps://library.ncl.res.in/content/fe-doped-sno2-nanomaterial-low-temperature-hydrogen-sulfide-gas-sensor-001863nas a2200217   4500008004100000022001400041245006600055210006600121260006900187300001200256490000800268520113400276653001501410653001601425653002101441653001401462100002801476700002501504700002201529856009401551       2008                        eng d  a0925-400500aInfluence of Pd doping on morphology and LPG response of SnO20 aInfluence of Pd doping on morphology and LPG response of SnO2  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY  a665-6720 v1313 a<p>In the present study nanocrystalline pristine and Pd-doped SnO2 (Pd:SnO2) with various mol% Pd have been synthesized by a modified Pechini citrate route. Transmission electron microscopy and X-ray powder diffraction studies were used to characterize the morphology, crystallinity, and structure of the SnO2 and Pd:SnO2. The response of the pristine SnO2 and Pd:SnO2 was studied towards different reducing gases. The 1.5 mol% Pd doping showed an enhanced response of 75 and 95% towards LPG at as low as 50 and 100 degrees C, respectively, which were quite large high value as compared with pristine SnO2 (38 and 35% at 50 and 100 degrees C, respectively). Structural characterization revealed that Pd doping reduced the crystallite size of SnO2 and helps in the formation of distinct spherical nanospheres at a calcinations temperature of 500 degrees C. Thus the increase in LPG response can be correlated with the spherical morphology, a decrease in the crystallite size (11 nm) due to doping with Pd as compared with the pristine SnO2 (26 nm) and main role of Pd as a catalyst. (c) 2008 Elsevier B.V. All rights reserved.</p>10aLPG sensor10ananospheres10apalladium doping10atin oxide1 aVaishampayan, Mukta, V.1 aDeshmukh, Rupali, G.1 aMulla, Imtiaz, S.  uhttps://library.ncl.res.in/content/influence-pd-doping-morphology-and-lpg-response-sno2-0