02467nas a2200277   4500008004100000022001400041245012500055210006900180260009200249300001200341490000600353520143300359653000701792653000901799653001801808653004401826653003301870100002101903700001901924700002701943700001901970700002501989700002102014700002702035856012702062       2009                        eng d  a1662-525000aConcurrent In-situ formation of Ag/Ag2S nanoparticles in polymer matrix by facile polymer-inorganic solid state reaction0 aConcurrent Insitu formation of AgAg2S nanoparticles in polymer m  aLAUBISRUTISTR 24, STAFA-ZUERICH, CH-8712, SWITZERLANDbTRANS TECH PUBLICATIONS LTDcJAN  a143-1520 v53 a<p>We herein report the feasibility of polymer-inorganic solid-state reaction route for simultaneous in situ generation of Ag &amp; Ag2S nanostructures in polymer network wherein an engineering thermoplastic, polyphenylene sulphide (PPS), itself acts as a chalcogen source as well as a stabilizing matrix for the resultant nanoproducts. Typical solid-state reaction was accomplished by simply heating the physical admixture of the two reactants i.e. AgNO3 and PPS by varying molar ratios mainly 1:1, 1:5, 1:15, 1:20, at the crystalline melting temperature (285 degrees C) of PPS. The synthesized nanoparticles were characterized by various physico-chemical techniques like X-ray Diffractometry, Scanning Electron Microscopy equipped with EDAX, Transmission Electron Microscopy and UV-Visible spectroscopy. The prima facie observations suggest the effective formation and subsequent entrapment of mainly nanocrystalline metallic silver (fcc) in PPS matrix for all the molar ratios chosen for the reaction. Additionally, simultaneous occurrence of nanocrystalline Ag2S (monoclinic phase) is also noticed in case of heated admixture of AgNO3: PPS with equimolar ratio. The TEM analysis reveals nanoscale polydispersity (5nm to 70nm) and prevalence of mainly spherical morphological features in all the cases with occasional indications of triangular and hexagonal morphological features depending upon the reaction molar ratio.</p>10aAg10aAg2S10aNanoparticles10aPolymer inorganic solid -state reaction10aThermoplastic polymer matrix1 aWaghmare, Sujata1 aShinde, Manish1 aGholap, Ramkrishna, S.1 aRao, Koteswara1 aHawaldar, Ranjit, R.1 aMulik, Uttam, P.1 aAmalnerkar, Dinesh, P.  uhttp://library.ncl.res.in/content/concurrent-situ-formation-agag2s-nanoparticles-polymer-matrix-facile-polymer-inorganic-002252nas a2200289   4500008004100000022001400041245009500055210006900150260000800219300000900227490000700236520135300243653002001596653001801616653001901634653001401653100001701667700001801684700002201702700001901724700001901743700001601762700002101778700001901799700001901818856012501837       2017                        eng d  a1432-848800aConcurrent synthesis of SnO/SnO2 nanocomposites and their enhanced photocatalytic activity0 aConcurrent synthesis of SnOSnO2 nanocomposites and their enhance  cJAN  a9-170 v213 a<p>The SnO/SnO2 nanocomposites were synthesized using semisolvothermal reaction technique. These nanocomposites were prepared using different combination of solvents viz., ethanol, water, and ethylene glycol at 180 A degrees C for 24 h. The synthesized nanocomposites were analyzed with various characterization techniques. Structural analysis indicates the formation of tetragonal phase of SnO2 for the sample prepared in ethanol, whereas for other solvent combinations, the mixture of SnO and SnO2 having tetragonal crystal structures were observed. The optical study shows enhanced absorbance in the visible region for all the prepared SnO/SnO2 nanocomposites. The observed band gap was found to be in the range of 3.0 to 3.25 eV. Microstructural determinations confirm the formation of nanostructures having spherical as well as rod-like morphology. The size of nanoparticles in ethanol-mediated solvent was found to be in the range of 5 to 7 nm. Thermogravimetric analysis indicate the weight gain around 1.3 wt% confirming the conversion of SnO to SnO2 material. The photocatalytic activity of synthesized nanocomposites was evaluated by following the aqueous methylene blue (MB) degradation. The sample prepared in ethylene glycol-mediated solvent showed highest photoactivity having apparent rate constant (K-app) 0.62 x 10(-2) min(-1).</p>10aDye-degradation10aNanocomposite10aPhotocatalysis10atin oxide1 aRoy, Animesh1 aArbuj, Sudhir1 aWaghadkar, Yogesh1 aShinde, Manish1 aUmarji, Govind1 aRane, Sunit1 aPatil, Kashinath1 aGosavi, Suresh1 aChauhan, Ratna  uhttp://library.ncl.res.in/content/concurrent-synthesis-snosno2-nanocomposites-and-their-enhanced-photocatalytic-activity