Synthesis of Polypyrrole-Intercalated Grafted Zirconium Phosphate Films by Anodic Electrodeposition and Their Electrochemical Capacities

Ternary hybrid film composed of a-zirconium phosphate nanosheet, 1,2-bis(dimethylchlorosilyl)ethane and polypyrrole was prepared by anodic electrodeposition. In the hybrid film, ordered a-zirconium nanosheets with grafts by silylation lay down parallel to the substrate and the polypyrrole molecules were intercalated between the nanosheets. The electrochemical measurements confirmed that the hybrid film indicated capacitive behavior and the redox activity increase by approximately 25%

Template-free hydrothermal synthesis of hollow hematite microspheres

Hollow hematite (alpha-Fe(2)O(3)) microspheres with an average diameter of 3-4 mu m and a shell thickness of approximate 150 nm was synthesized by a simple hydrothermal route using FeCl(3)center dot 6H(2)O solution and acetic acid without using any templates. The hollow microspheres were composed of alpha-Fe(2)O(3) nanoparticles with the diameter range from 20 to 40 nm. The effects of reaction parameters such as reaction time, temperature, concentration of FeCl(3)center dot 6H(2)O solution, and initial pH on the morphology of the final products were investigated. A possible formation mechanism of hollow alpha-Fe(2)O(3) microspheres was also proposed, where the acetic acid played a role of etching in the formation of hollow structure

Vibrational spectra of Sn2TiO4

The infrared and Raman spectra of the recently synthesized tin(II) titanate, Sn2TiO4, were recorded and briefly discussed on the basis of its structural peculiarities. © 2009 Elsevier B.V. All rights reserved.Fil: Baran, Enrique José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Gonzalez Baro, Ana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Kumada, Nobihiru. University of Yamanashi; JapónFil: Kinomura, Nobukazu. University of Yamanashi; JapónFil: Takei, Takahiro. University of Yamanashi; JapónFil: Yonesaki, Yoshinori. University of Yamanashi; Japó

Synthesis of hematite particles with various shapes by a simple hydrothermal reaction

Hematite particles with various shapes have been synthesized through a simple hydrothermal reaction. The particle shape and size can be controlled by adjusting pH value in the starting solution. The products were characterized by X-ray powder diffraction patterns (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), high resolution transmission electron microscope (HRTEM), FT-IR, TG-DTA and mass spectrometry of gas species during TC-DTA. The TEM and HRTEM results revealed that large numbers of micropores ranging from 0.5-0.6 turn existed in the surface of spherical particles. (C) 2009 The Ceramic Society of Japan. All rights reserved

Preparation and crystal structure of [enH(2)](0.5)[Ho(HPO4)(SO4)(H2O)] (en; ethylenediamine)

Single crystals of an organically templated holmium hydrogen phosphate sulfate, [enH(2)](0.5)[Ho(HPO4)(SO4)(H2O)] (en; ethylenediamine) were prepared by hydrothermal reaction and its crystal structure was determined by single crystal X-ray diffraction data. This compound crystallized in the monoclinic system, space group P2(1)/a (No. 14) and the unit cell parameters are a 12.938(5), b = 6.834(3), c = 9.100(2) angstrom, and beta=88.12(2)degrees. The crystal structure is similar to that of [enH(2)](0.5)[Ce(HPO4)(SO4)(H2O)] which had a layered structure built tip by Cc centered polyhedra and HPO4 and SO4 tetrahedra, and the diprotonated ethylenediamine cations were located in the interlayer. For other rare earth elements two types of compounds were obtained tinder hydrothermal conditions. The compounds of R = La, Pr, Nd, Sm and Eu are isostructural with [enH(2)](0.5)[Ce(HPO4)(SO4)(H2O)] and those of Gd, Th, Dy, Er and Yb with [enH(2)](0.5)[Ho(HPO4)(SO4)(H2O)]. The unit cell volumes of these compounds decrease by lanthanide contraction. The compounds of R except La, Sm and Eu exhibited the Curie-Weiss paramagnetic behavior. (C)2010 The Ceramic Society of Japan. All rights reserved