02387nas a2200265   4500008004100000022001400041245012100055210006900176260000900245300001100254490000800265520152600273653001701799653001801816653000801834100002201842700001801864700001901882700002401901700001801925700001801943700001601961700001801977856012601995       2020                        eng d  a0924-424700a2-D to 3-D conversion of WO3 nanostructures using structure directing agent for enhanced NO2 gas sensing performance0 a2D to 3D conversion of WO3 nanostructures using structure direct  cAPR   a1118820 v3043 a<p>An exotic 3-D tungsten oxide (WO3) microflower was synthesized via low-cost and environmental-friendly hydrothermal strategy. The effect of structure-directing agent on the formation of 3-D microflowers from a 2-D nanosheets of WO3 and its gas sensing behavior are investigated. The assynthesized WO3 powder was used in morphological, structural and phase studies by X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The WO3 samples were found to be polycrystalline with monoclinic crystal structure. The SEM micrographs revealed the formation of 3-D microflowers made up of two-dimensional (2-D) multi-directional dendritic nanoplates. The potassium hydroxide (KOH) acts as a structure-directing agent in the formation of 3-D microflowers of WO3 sample. To further understand the formation of 3-D microflowers of WO3 sample, concentration-dependent experiments were carried out by varying KOH concentration and the formation mechanism was investigated. The synthesized WO3 microstructures were subjected to detailed gas sensing tests for different gases at an optimized temperature. A selective, sensitive gas response was obtained for WO3 gas sensor. The lower detection limit is about 1 ppm at 150 degrees C working temperature for an optimized WO3 gas sensor. The gas sensing results indicate that the 3-D microflower-like WO3 nanostructures are highly promising for applications as gas sensors. (C) 2020 Published by Elsevier B.V.</p>
10aMicroflowers10aNO2 detection10aWO31 aBeknalkar, S., A.1 aPatil, V., L.1 aHarale, N., S.1 aSuryawanshi, M., P.1 aPatil, A., P.1 aPatil, V., B.1 aKim, J., H.1 aPatil, P., S.  uhttps://library.ncl.res.in/content/2-d-3-d-conversion-wo3-nanostructures-using-structure-directing-agent-enhanced-no2-gas01925nas a2200265   4500008004100000022001400041245009300055210006900148260000800217300001400225490000700239520108500246653001701331653001701348653002101365653001901386100001901405700001701424700002201441700001901463700001801482700001701500700002401517856011801541       2022                        eng d  a1380-222400aSponge microflowers of NiCo2O4: a versatile material for high performance supercapacitor0 aSponge microflowers of NiCo2O4 a versatile material for high per  cAUG  a1239-12520 v293 a<p>
	We report the development of well optimised NiCo2O4 microflowers for high performance supercapacitor application. The efforts were made to optimise the electrode material by tuning the synthetic as well as electrolyte concentration parameters such as (i) hydrothermal reaction temperature, (ii) hydrothermal reaction time, (iii) sintering temperature, and (iv) electrolyte concentration. The physico-chemical and supercapacitive properties were analysed using TGA, XRD, SEM/TEM/HRTEM, XPS, BET, and electrochemical measurements. The well optimised electrode material was obtained at 150 degrees C hydrothermal reaction temperature, 12 h of hydrothermal reaction time, 300 degrees C sintering temperature, and 3 M KOH electrolyte concentration. The optimised sample displayed high specific -capacitance (1478 F/g), -energy density (16.5 Wh/kg), and -power density (248 W/kg). The specific capacitance can be retained to 97.61% after 1000 cycles. The developed NiCo2O4 microflower structures are well optimised and offer great promise for future industrial applications.</p>
10ahydrothermal10aMicroflowers10aNickel cobaltite10asupercapacitor1 aGhadage, Ambar1 aKodam, Pavan1 aNadargi, Digambar1 aShinde, K., P.1 aMulla, Imtiaz1 aPark, J., S.1 aSuryavanshi, Sharad  uhttps://library.ncl.res.in/content/sponge-microflowers-nico2o4-versatile-material-high-performance-supercapacitor