02069nas a2200289 4500008004100000022001400041245006700055210006400122260006900186300001200255490000800267520115300275653001301428653001801441653001601459653001001475653001101485100002301496700002801519700001901547700002301566700001901589700003001608700002101638700001801659856010201677 2016 eng d a0925-400500aH2S detection using low-cost SnO2 nano-particle Bi-layer OFETs0 aH2S detection using lowcost SnO2 nanoparticle Bilayer OFETs aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcNOV a378-3850 v2353 a

In this article, a unique platform with an organic field-effect transistor (OFET) integrated with metal oxide nanoparticles for sensing of H2S gas is presented. Metal oxide nanoparticles such as SnO2 and ZnO synthesized using herbal techniques were used in the fabrication of OFETs using a bi-layer technique. The as -synthesized nanoparticles were characterized by Field Effect Scanning Electron Microscopy (FESEM), X-ray diffraction (XRD) and UV-vis Spectroscopy (UV-vis) to establish the material properties. We showed that the SnO2 based OFETs displayed better response for H2S at room temperature (25 degrees C) compared to the OFETs fabricated with ZnO. The characterization of the sensors by using extracted electrical parameters like field-effect mobility ([1), On -Current (Ion), threshold voltage (VT) and saturation current (ID]) establish the fact that the SnO2 based OFETs detect H2S gas at room temperature. Plausible mechanisms explaining the H2S gas detection by bi-layer film were discussed. On the other hand, the sensitivity of these OFETs against other reducing gases was less. (C) 2016 Elsevier B.V. All rights reserved.

10abi-layer10aH2S detection10aMetal-oxide10aOFETs10aSensor1 aSurya, Sandeep, G.1 aAshwath, B., S. Narayan1 aMishra, Sushma1 aKarthik, A., R. B.1 aSastry, A., B.1 aPrasad, Bhagavatula L. V.1 aRangappa, Dinesh1 aRao, Ramgopal uhttps://library.ncl.res.in/content/h2s-detection-using-low-cost-sno2-nano-particle-bi-layer-ofets12211nas a2200289 45000080041000000220014000412450146000552100069002012600008002703000011002784900008002895201119900297653001111496653000811507653005211515653002111567100002011588700002311608700003011631700002511661700001911686700002211705700001811727700002111745700002711766856012811793 2021 eng d a1385-894700aGreen route for carbonylation of amines by CO2 using Sn-Ni-O bifunctional catalyst and theoretical study for finding best suited active sites0 aGreen route for carbonylation of amines by CO2 using SnNiO bifun cSEP a1294390 v4193 a

Reaction between n-alkylamine and CO2 has gained interest due to the demand for the dialkylurea for various applications. For the first time, the tool Mathematica was used to analyze the experimental data with an idea to derive an equation which determines the best suited active sites for any given input set of dependent parameters. The equation can further be used to predict the product yield with the known values of active sites for a reaction. Among several Sn containing mixed oxides, Sn-Ni oxide (Sn-Ni-O) was found to be the better performing catalyst. The studies indicate that the formation of new defect sites when NiO and SnO2 are in the mixed state and possibly a solid solution enhances the catalytic efficiency. There are two main reasons for improved catalytic performance; one, mixing of SnO2 into NiO which reduces the number of holes (h+) localized on lattice oxygen (O2−+ h+→ O•−) and two, smaller SnO2 particles are dispersed on the bigger particle NiO which alters the acidic and basic active sites in the catalyst. FT-IR adsorption study with amine and CO2 helped in deriving a plausible mechanism for this reaction. Under optimized reaction condition, Sn1.1-Ni-O-600 gave 77.3% of n-butylamine conversion and 75.7% of yield for 1,3-dibutylurea. The versatility of the catalyst was tested for carbonylation of different aliphatic and aromatic amines, diamine and hydroxy amine with CO2.

10aamines10aCO210aMixed oxide catalyst and bi-functional catalyst10aSubstituted urea1 aKulal, Nagendra1 aVetrivel, Rajappan1 aGopinath, Chinnakonda, S.1 aRavindran, Rahul, K.1 aRao, Vinod, N.1 aShetty, Manjunath1 aShrikanth, R.1 aRangappa, Dinesh1 aShanbhag, Ganapati, V. uhttps://library.ncl.res.in/content/green-route-carbonylation-amines-co2-using-sn-ni-o-bifunctional-catalyst-and-theoretical