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Alkali Metal Hydroxide

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Kazuyuki Kakegawa – One of the best experts on this subject based on the ideXlab platform.

  • effect of Alkali Metal Hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing zn oh 42 ions
    Physical Chemistry Chemical Physics, 2004
    Co-Authors: Naofumi Uekawa, Ryo Yamashita, Kazuyuki Kakegawa

    Abstract:

    Aqueous solutions containing Zn(OH)42− ions were prepared by adding 50 ml of 1.5 mol l−1 aqueous Alkali Metal Hydroxide (MOH: M = Li, Na, K, Cs) to 50 ml of 0.1 mol l−1 aqueous zinc nitrate hydrate (Zn(NO3)2·6H2O). Zinc oxide (ZnO) crystallites were obtained by heating aqueous solutions containing Zn(OH)42− ions at ≥348 or 368 K for 3 h. The morphology depended on both of the heating temperature of the Zn(OH)42− aqueous solution and the Alkali Metal Hydroxide used to obtain Zn(OH)42− ions. According to the result of the kinetics of the zinc oxide formation, it was shown that the decomposition of Zn(OH)42− ions on the zinc oxide surface was the rate determining step when NaOH, KOH and CsOH were used to obtain Zn(OH)42− ions. When LiOH was used to obtain Zn(OH)42− ions, the rate determining step was the nucleation of zinc oxide and/or the adsorption of Zn(OH)42− ions.

  • Effect of Alkali Metal Hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing Zn(OH)42− ions
    Physical Chemistry Chemical Physics, 2004
    Co-Authors: Naofumi Uekawa, Ryo Yamashita, Kazuyuki Kakegawa

    Abstract:

    Aqueous solutions containing Zn(OH)42− ions were prepared by adding 50 ml of 1.5 mol l−1 aqueous Alkali Metal Hydroxide (MOH: M = Li, Na, K, Cs) to 50 ml of 0.1 mol l−1 aqueous zinc nitrate hydrate (Zn(NO3)2·6H2O). Zinc oxide (ZnO) crystallites were obtained by heating aqueous solutions containing Zn(OH)42− ions at ≥348 or 368 K for 3 h. The morphology depended on both of the heating temperature of the Zn(OH)42− aqueous solution and the Alkali Metal Hydroxide used to obtain Zn(OH)42− ions. According to the result of the kinetics of the zinc oxide formation, it was shown that the decomposition of Zn(OH)42− ions on the zinc oxide surface was the rate determining step when NaOH, KOH and CsOH were used to obtain Zn(OH)42− ions. When LiOH was used to obtain Zn(OH)42− ions, the rate determining step was the nucleation of zinc oxide and/or the adsorption of Zn(OH)42− ions.

John B. Wiley – One of the best experts on this subject based on the ideXlab platform.

  • Topochemical Synthesis of AlkaliMetal Hydroxide Layers within Double- and Triple-Layered Perovskites.
    ChemInform, 2014
    Co-Authors: Dariush Montasserasadi, Debasish Mohanty, Ashfia Huq, Luke Heroux, E. A. Payzant, John B. Wiley

    Abstract:

    Alkali Metal Hydroxide layers within lamellar perovskites are formed by a two-step topochemical synthesis.

  • Topochemical synthesis of AlkaliMetal Hydroxide layers within double- and triple-layered perovskites.
    Inorganic chemistry, 2014
    Co-Authors: Dariush Montasserasadi, Debasish Mohanty, Ashfia Huq, Luke Heroux, E. A. Payzant, John B. Wiley

    Abstract:

    The formation of AlkaliMetal Hydroxide layers within lamellar perovskites has been accomplished by a two-step topochemical reaction strategy. Reductive intercalation of ALaNb2O7 with Alkali Metal (A = K, Rb) and RbCa2Nb3O10 with Rb leads to A2LaNb2O7 and Rb2Ca2Nb3O10, respectively. Oxidative intercalation with stoichiometric amounts of water vapor, produced by the decomposition of calcium oxalate monohydrate in a sealed ampule, allows the insertion Hydroxide species. Compounds of the form (A2OH)LaNb2O7 (A = K, Rb) and (Rb2OH)Ca2Nb3O10 are accessible. X-ray diffraction data indicates a clear layer expansion of almost 3 A on the insertion of Hydroxide relative to that of the parent. Rietveld refinement of neutron diffraction data collected on deuterated samples of (Rb2OD)LaNb2O7 (P4/mmm space group, a = 3.9348(1) A, c = 14.7950(7) A) finds that both rubidium and oxygen species reside in cubic sites forming a CsCl-like interlayer structure between niobate perovskite blocks. Hydrogens, attached to the interl…

Naofumi Uekawa – One of the best experts on this subject based on the ideXlab platform.

  • effect of Alkali Metal Hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing zn oh 42 ions
    Physical Chemistry Chemical Physics, 2004
    Co-Authors: Naofumi Uekawa, Ryo Yamashita, Kazuyuki Kakegawa

    Abstract:

    Aqueous solutions containing Zn(OH)42− ions were prepared by adding 50 ml of 1.5 mol l−1 aqueous Alkali Metal Hydroxide (MOH: M = Li, Na, K, Cs) to 50 ml of 0.1 mol l−1 aqueous zinc nitrate hydrate (Zn(NO3)2·6H2O). Zinc oxide (ZnO) crystallites were obtained by heating aqueous solutions containing Zn(OH)42− ions at ≥348 or 368 K for 3 h. The morphology depended on both of the heating temperature of the Zn(OH)42− aqueous solution and the Alkali Metal Hydroxide used to obtain Zn(OH)42− ions. According to the result of the kinetics of the zinc oxide formation, it was shown that the decomposition of Zn(OH)42− ions on the zinc oxide surface was the rate determining step when NaOH, KOH and CsOH were used to obtain Zn(OH)42− ions. When LiOH was used to obtain Zn(OH)42− ions, the rate determining step was the nucleation of zinc oxide and/or the adsorption of Zn(OH)42− ions.

  • Effect of Alkali Metal Hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing Zn(OH)42− ions
    Physical Chemistry Chemical Physics, 2004
    Co-Authors: Naofumi Uekawa, Ryo Yamashita, Kazuyuki Kakegawa

    Abstract:

    Aqueous solutions containing Zn(OH)42− ions were prepared by adding 50 ml of 1.5 mol l−1 aqueous Alkali Metal Hydroxide (MOH: M = Li, Na, K, Cs) to 50 ml of 0.1 mol l−1 aqueous zinc nitrate hydrate (Zn(NO3)2·6H2O). Zinc oxide (ZnO) crystallites were obtained by heating aqueous solutions containing Zn(OH)42− ions at ≥348 or 368 K for 3 h. The morphology depended on both of the heating temperature of the Zn(OH)42− aqueous solution and the Alkali Metal Hydroxide used to obtain Zn(OH)42− ions. According to the result of the kinetics of the zinc oxide formation, it was shown that the decomposition of Zn(OH)42− ions on the zinc oxide surface was the rate determining step when NaOH, KOH and CsOH were used to obtain Zn(OH)42− ions. When LiOH was used to obtain Zn(OH)42− ions, the rate determining step was the nucleation of zinc oxide and/or the adsorption of Zn(OH)42− ions.