01882nas a2200241 4500008004100000022001400041245009200055210006900147260006900216300001000285490000800295520101100303653001301314653002001327653001601347653002401363653002601387100002501413700002601438700002901464700002201493856012501515 2005 eng d a0921-510700aRapid hydrothermal synthesis route for nanocrystalline SrZrO3 using reactive precursors0 aRapid hydrothermal synthesis route for nanocrystalline SrZrO3 us aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY a87-930 v1193 a

Synthesis of nanocrystalline, orthorhombic (space group Pnma) SrZrO3 was achieved using appropriate molar proportions of nitrate salts of strontium and zirconium as precursors. Formation of SrZrO3 (SZ) was facilitated hydrothermally in time period as less as half-an-hour, in aqueous medium with alkaline pH as confirmed by XRD. Sample characterization was performed by FT-IR spectroscopy; powder XRD, SEM, TEM and DSC. The results have been explained by proposing a suitable reaction mechanism based on the step-wise analysis of the reaction intermediates using FT-IR as well as XRD. A double cation hydroxide composite formation is anticipated that under hydrothermal conditions results in the formation of SrZrO3. Morphology of the samples was determined with the help of SEM and TEM. The particle size distribution as seen from the TEM micrograph lies in the range of 15-25 nm. Heats of reaction for different decomposition steps were obtained by DSC. (c) 2005 Elsevier B.V. All rights reserved.

10aCeramics10aCrystallization10adiffraction10aElectron microscopy10ainfrared spectroscopy1 aAthawale, Anjali, A.1 aChandwadkar, Asha, J.1 aKarandikar, Prashant, R.1 aBapat, Malini, S. uhttps://library.ncl.res.in/content/rapid-hydrothermal-synthesis-route-nanocrystalline-srzro3-using-reactive-precursors-001335nas a2200265 4500008004100000022001400041245006300055210006300118260010600181300001200287490000700299520045800306653001300764653002000777653001800797653001500815653001500830653000800845100002500853700002600878700002900904700001700933700002200950856009700972 2006 eng d a0969-806X00aRadiation assisted synthesis of nanosized barium zirconate0 aRadiation assisted synthesis of nanosized barium zirconate aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUL a755-7590 v753 a

This paper reports the synthesis of refractory barium zirconate using solid-state reactive precursors subjected to gamma-radiations of a Co-60 source. Influence of varying doses on the formation of cubic phase of BaZrO3 has been investigated with the stepwise analysis of the intermediate products by means of FT-IR, XRD and TGA techniques. TEM depicts the nanospherical nature of the BaZrO3 particles. (C) 2006 Elsevier Ltd. All rights reserved.

10aCeramics10agamma-radiation10aNanoparticles10aperovskite10arefractory10aXRD1 aAthawale, Anjali, A.1 aChandwadkar, Asha, J.1 aKarandikar, Prashant, R.1 aPasricha, R.1 aBapat, Malini, S. uhttps://library.ncl.res.in/content/radiation-assisted-synthesis-nanosized-barium-zirconate-002208nas a2200217 4500008004100000022001400041245012400055210006900179260011000248300001400358490000700372520133700379100001601716700002201732700001801754700001801772700002501790700002301815700002501838856012701863 2010 eng d a1463-907600aElucidation of the role of hexamine and other precursors in the formation of magnetite nanorods and their stoichiometry0 aElucidation of the role of hexamine and other precursors in the  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a3246-32530 v123 a

Hexamine is known to assist anisotropic growth of metal oxides and the same is also found to be true for magnetite nanosynthesis. In this work we elucidate the role of hexamine and other precursors in the formation of magnetite nanorods by the hydrothermal route and their stoichiometry. Various others hydrolyzing agents such as sodium hydroxide (NaOH), sodium hydroxide + hexamine, ammonia (NH(3)), ammonia + formaldehyde are also studied. The synthesized nanoparticles are characterized with the help of various techniques such as X-ray diffraction (XRD), FT-IR spectroscopy, UV-VIS-NIR spectroscopy, transmission electron microscopy (TEM), Mossbauer spectroscopy and SQUID magnetization measurements. It is found that only when ferric chloride, ferrous ammonium sulfate (FAS) and hexamine are used, well defined nanorods are formed. When sodium hydroxide and hexamine are used as a hydrolyzing system nearly spherical nanoparticles with small size (similar to 13 nm) are formed, as compared to the case of sodium hydroxide alone which leads to bigger cube like nanoparticles. Interestingly the decomposition products of hexamine do not lead to nanorod formation. Thus, slow decomposition of hexamine at elevated temperature and the consequent slow rise in pH is the key to the anisotropic growth of the iron oxide system.

1 aSingh, Hema1 aBhagwat, Shrikant1 aJouen, Samuel1 aLefez, Benoit1 aAthawale, Anjali, A.1 aHannoyer, Beatrice1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/elucidation-role-hexamine-and-other-precursors-formation-magnetite-nanorods-and-their-001669nas a2200253 4500008004100000022001400041245009500055210006900150260007300219300001200292490000800304520069300312653004101005653003501046653003001081653003701111653002201148653003701170100001801207700001801225700001801243700002501261856012901286 2013 eng d a0169-433200aBulk and surface structure characterization of nanoscopic silver doped lanthanum chromites0 aBulk and surface structure characterization of nanoscopic silver aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN a574-5800 v2643 a

Crystalline state of lanthanum chromites with silver as a dopant has been studied by X-ray diffraction and transmission electron microscopy reveals microscopic properties of grain boundaries. X-ray photoelectron spectroscopy has been used to analyze surface states with atomic ratio of La, Cr, O and Ag as a dopant. LaCrO3 shows mixed valence states of chromium while the silver doped samples exhibit differences in chromium concentration with the oxidation of Cr3+ to Cr6+ in presence of chromium nitrate as a precursor salt. Trivalent stable state of chromium is observed for samples synthesized by chromic acetate as a precursor salt. (C) 2012 Elsevier B.V. All rights reserved.

10aEnergy dispersive analysis of X-rays10aMicrowave combustion synthesis10aPerovskite nanostructures10atransmission electron microscopy10aX-ray diffraction10aX-ray photoelectron spectroscopy1 aDesai, P., A.1 aJoshi, P., N.1 aPatil, K., R.1 aAthawale, Anjali, A. uhttps://library.ncl.res.in/content/bulk-and-surface-structure-characterization-nanoscopic-silver-doped-lanthanum-chromites-002470nas a2200157 4500008004100000245006700041210006600108260000800174300001400182490000700196520194000203100001902143700002502162700002902187856009602216 2019 eng d00aValorization of oceanic waste biomass: a catalytic perspective0 aValorization of oceanic waste biomass a catalytic perspective cSEP a1995-20210 v193 a

Efficacious waste utilization is vital in context of sustainability. The past decade has witnessed attempts of usage of land biomass and wastes for various applications, contributing towards a sustainable society. Exploitation of the marine biomass, which does not compete with habitation and food production like land biomass has been largely unnoticed and therefore not being utilized judiciously. Researchers have mainly exploited these resources as functional materials having significant potential applications. However, a catalytic perspective for the valorisation of these polymers arising from oceanic waste widens their scope and ameliorates its use. The objective of the present review is to demonstrate the effectiveness of chitin/chitosan as a catalyst and as a feedstock for deriving important fuels and chemicals. It displays all the reactions heterogeneously catalyzed by them along with the strategic methodology. Their important catalytic organic transformations attempted so far, have also been discussed. The future perspectives are also presented which if inculcated would improve the value addition of the waste, paving a way for greener and imperishable world.

1 aLucas, Nishita1 aAthawale, Anjali, A.1 aRode, Chandrashekhar, V. uhttps://library.ncl.res.in/content/valorization-oceanic-waste-biomass-catalytic-perspective01933nas a2200217 4500008004100000022001400041245010400055210006900159260000900228300001100237490000800248520115500256653002101411653002901432653003101461100002301492700002701515700002401542700002501566856012401591 2021 eng d a0032-386100aInterconnected polyaniline nanostructures: enhanced interface for better supercapacitance retention0 aInterconnected polyaniline nanostructures enhanced interface for cJAN  a1231690 v2123 a

Polyaniline and its nanocomposites have emerged as desirable electrode materials for supercapacitors. However, achieving specific capacitance with long-term cyclic stability is still a challenge. The present study reports on novel hierarchically porous and cross-linked polyaniline synthesized by a method employing aniline (monomer) and phytic acid (dopant acid) in the presence of octyltrimethyl ammonium bromide (OTAB) surfactant. The electrochemical performance of the phytic acid doped sample has been compared with HCl doped samples, the former being superior, i.e., a specific capacitance of 523 and 325 F g(-1) at current densities of 0.25 and 10 A g(-1), respectively. Additionally, the same possess excellent cycling stability with retention of similar to 88% of its initial capacitance over 10,000 charge-discharge cycles. Further, the phytic acid doped sample exhibited a lower equivalent series resistance (0.98 Omega cm(2)) than the HCl doped sample (1.26 Omega cm(2)). These results reveal the capability of the phytic acid doped hierarchical polyaniline sample as a promising active material for electrochemical applications.

10aCyclic stability10aHierarchical polyaniline10aSupercapacitance retention1 aMooss, Vandana, A.1 aVijayakumar, Vidyanand1 aKurungot, Sreekumar1 aAthawale, Anjali, A. uhttps://library.ncl.res.in/content/interconnected-polyaniline-nanostructures-enhanced-interface-better-supercapacitance02381nas a2200277 4500008004100000022001400041245008600055210006900141260000800210300001100218490000800229520153500237653001801772653001301790653001101803653001501814653001801829653002301847100001901870700002201889700001801911700001701929700001701946700002501963856011501988 2025 eng d a0141-813000aSustainable UV absorbing bio-plastic films by valorisation of humins and chitosan0 aSustainable UV absorbing bioplastic films by valorisation of hum cJUN a1437100 v3113 a

Humins, an inevitable bio-refinery waste by-product of sugar dehydration have been efficiently utilized for the first time for developing biodegradable thin films for UV shielding. The films were prepared from chitosan, and humins, a novel combination, aiming towards simultaneous utilization of marine and bio-refinery waste, rendering simple, effective, robust UV absorbing films. The structure-activity relationship of these films were elucidated with the help of different analytical techniques like X-ray diffraction, Fourier transform infrared spectroscopy, Thermogravimetric analysis, UV-vis spectroscopy, Atomic force microscopy, Scanning electron microscopy, Tensile testing, Contact angle measurements and water absorption studies. Intrinsic biodegradability was studied using fungi i.e. Aspergillus niger. Different feedstocks (corncob, rice husk, glucose and xylose) were explored for generating humins. Amongst them, humins derived from xylose were utilized for the preparation of the bio-plastic films of chitosan. The results revealed that, addition of 5.0 % humins was observed to be an optimum concentration yielding films with excellent UV absorption, mechanical properties, and biodegradability. The current work is in perfect alignment with sustainability and green chemistry as it ameliorates waste valorization (lignocellulosic and marine altogether). Further, its innovation stems from the first-hand use of humins for UV absorption, novel combination of biopolymers, use of green raw materials.

10abiodegradable10aChitosan10aHumins10aThin films10aUV absorption10aWaste valorization1 aLucas, Nishita1 aTambe, Snehal, S.1 aParate, Roopa1 aHengne, Amol1 aRode, C., V.1 aAthawale, Anjali, A. uhttps://library.ncl.res.in/content/sustainable-uv-absorbing-bio-plastic-films-valorisation-humins-and-chitosan