Zobrazeno 1 - 10
of 97
pro vyhledávání: '"G N Subbanna"'
Autor:
Jagannatha Gopalakrishnan, Thathan Sivakumar, Kannadka Ramesha, G. N. Subbanna, Kandalam V. Ramanujachary, Samuel E. Lofland
Publikováno v:
Journal of Solid State Chemistry. 177:2635-2638
We report the formation of a new n = 3 Ruddlesden–Popper (R–P) layered perovskite oxide, $Ca_2La_2CuTi_2O_{10}$ (I), in the metathesis reaction between $NaLaTiO_4$ and $Ca_2CuO_2Cl_2$ (n = 1 R–P phases) at $700^oC$ in air. Rietveld refinement o
Publikováno v:
Journal of Materials Science. 39:4271-4286
Preparation of nanoparticles with the desired shape and size by the wet-chemical precipitation process is a challenging task. Thus, the effects of different substitutional impurities such as Al, Cr, Co or Ni on the particle morphology and phase stabi
Publikováno v:
Chemistry of Materials. 16:2317-2328
Ionically dispersed Rh over CeO2 in Rh/CeO2 catalysts prepared by a single step solution combustion method is shown to improve the redox property and catalytic activity. The H2/Rh ratio obtained from hydrogen uptake measurement was 5.4, 2.4, and 2.1,
Autor:
Samuel E. Lofland, Kannadka Ramesha, G. N. Subbanna, T. Sivakumar, Kandalam V. Ramanujachary, J. Gopalakrishnan
Publikováno v:
Inorganic Chemistry. 43:1857-1864
We describe the synthesis of two new quadruple perovskites, Sr(2)La(2)CuTi(3)O(12) (I) and Ca(2)La(2)CuTi(3)O(12) (II), by solid-state metathesis reaction between K(2)La(2)Ti(3)O(10) and A(2)CuO(2)Cl(2) (A = Sr, Ca). I is formed at 920 degrees C/12 h
Publikováno v:
Materials Research Bulletin. 39:71-81
$La_{1-x}Na_xMn_{1-y}Na_yO_3$ (0.12 < x < 0.16;0.04 < y < 0.07) have been synthesized from NaBr and NaI fluxes at relatively low temperature of 850 and $750^o\hspace{2mm}C$, respectively. Final composition of these oxides was obtained from chemical a
Autor:
Munirpallam A. Subramanian, Gavin Lawes, Moumita Ghosh, Jin-Ping Zhang, Arup Gayen, A. P. Ramirez, G. N. Subbanna, WM Reiff, Ram Seshadri
Publikováno v:
Chemistry of Materials. 16:118-124
The ability of capped nanoparticles of inorganic materials to dissolve in nonpolar solvents such as toluene creates opportunities for size-selective precipitation, surface modification through covalent means, incorporation into polymer composites, an
Publikováno v:
Materials Chemistry and Physics. 82:663-671
The crystal structures of the solid solutions of Bi3-xLaxTiNbO9 (0 less than or equal to x less than or equal to 1) have been analyzed by powder X-ray diffraction with supporting evidence from selected area electron diffraction (SAD). The structure o
Publikováno v:
Chemistry of Materials. 15:2229-2233
A new oxide of the formula Nd2Ba2CaZn2Ti3O14.4 has been successfully prepared by a high-temperature ceramic route at 1200 degreesC. The title compound crystallizes in a cubic structure with a = 3.94263(7) Angstrom (space group = Pm (3) over barm, wRp
Autor:
K. R. Priolkar, M. S. Hegde, Parthasarathi Bera, V. Jayaram, G. N. Subbanna, Ryotaro Kumashiro, P. R. Sarode, S. Emura, Arup Gayen
Publikováno v:
Chemistry of Materials. 15:2049-2060
The structure and chemical nature of Pt in combustion-synthesized $Pt/CeO_2$ catalysts have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine s
Publikováno v:
Materials Research Bulletin. 38:731-740
Powder X-ray diffraction (PXRD) patterns of magnesium hydroxides precipitated under different conditions exhibit characteristic non-uniform broadening of Bragg peaks which cannot be explained merely on the basis of Scherrer broadening. The broadening