02069nas a2200229   4500008004100000022001400041245009800055210006900153260011100222300001400333490000700347520120200354100002201556700001901578700001801597700001701615700001801632700001801650700002301668700002901691856011901720       2011                        eng d  a1477-922600aMaghemite (hematite) core (shell) nanorods via thermolysis of a molecular solid of Fe-complex0 aMaghemite hematite core shell nanorods via thermolysis of a mole  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYc2011  a8003-80110 v403 a<p>An Fe-metal complex with 2'-hydroxy chalcone (2'-HC) ligands [Fe(III) (2'-hydroxy chalcone) 3] is synthesized by a chemical route and is subjected to different thermal treatments. Upon thermolysis in air at 450 degrees C for 3 h the complex yields maghemite (gamma-Fe(2)O(3)) nanorods with a thin hematite (alpha-Fe(2)O(3)) shell. X-Ray diffraction (XRD), Mossbauer spectroscopy, diffuse reflectance spectroscopy (UV-DRS), high resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometry (VSM) are used to characterize the samples. The stability of the ligand and the Fe-complex is further examined by using thermogravimmetric/differential thermal analysis (TGA/DTA). We suggest a residual ligand controlled mechanism for the formation of an anisotropic nanostructure in a crumbling molecular solid undergoing ligand decomposition. Since the band gap of iron oxide is in the visible range, we explored the use of our core shell nano-rod sample for photocatalytic activity for H(2) generation by H(2)S splitting under solar light. We observed high photocatalytic activity for hydrogen generation (75 ml h(-1)).</p>1 aChaudhari, N., S.1 aWarule, S., S.1 aMuduli, Subas1 aKale, B., B.1 aJouen, Samuel1 aLefez, Benoit1 aHannoyer, Beatrice1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/maghemite-hematite-core-shell-nanorods-thermolysis-molecular-solid-fe-complex-002223nas a2200289   4500008004100000022001400041245009600055210006900151260006900220300001200289490000800301520124000309653002301549653002401572653002701596653001901623100001901642700002201661700001801683700001801701700001401719700001701733700002201750700002101772700001601793856012401809       2012                        eng d  a0254-058400aMagnetic properties of nanocrystalline CoFe2O4 synthesized by thermal plasma in large scale0 aMagnetic properties of nanocrystalline CoFe2O4 synthesized by th  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC  a586-5950 v1373 a<p>The paper reports the large scale synthesis of nanoparticles of CoFe2O4 using thermal plasma reactor by gas phase condensation method. The yield of formation was found to be around 15 g h(-1). The magnetic properties of CoFe2O4, synthesized at different reactor powers, were investigated in view of studying the effect of operating parameters of plasma reactor on the structural reorganization leading to the different cation distribution. The values of saturation magnetization, coercivity and remanent magnetization were found to be influenced by input power in thermal plasma. Although the increase in saturation magnetization was marginal (61 emu g(-1) to 70 emu g(-1)) with increasing plasma power; a significant increase in the coercivity (552 Oe to 849 Oe) and remanent magnetization (16 emu g(-1) to 26 emu g(-1)) were also noticed. The Mossbauer spectra showed mixed spinel structure and canted spin order for the as synthesized nanoparticles. The detailed analysis of cation distribution using the Mossbauer spectroscopy and X-ray photoelectron spectroscopy leads to the conclusion that the sample synthesized at an optimized power shows the different site selective states. (C) 2012 Elsevier B.V. All rights reserved.</p>10aMagnetic materials10amagnetic properties10aMossbauer spectroscopy10aNanostructures1 aNawale, A., B.1 aKanhe, Nilesh, S.1 aPatil, K., R.1 aReddy, V., R.1 aGupta, A.1 aKale, B., B.1 aBhoraskar, S., V.1 aMathe, Vikas, L.1 aDas, A., K.  uhttps://library.ncl.res.in/content/magnetic-properties-nanocrystalline-cofe2o4-synthesized-thermal-plasma-large-scale-0