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Issue 44, 2014
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Hydrothermal synthesis of perovskite-type MTiO3 (M = Zn, Co, Ni)/TiO2 nanotube arrays from an amorphous TiO2 template

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Abstract

Ordered perovskite-type MTiO3/TiO2 nanotube arrays (NTAs) (M = Zn, Co, Ni) are prepared by a general hydrothermal route based on amorphous TiO2 NTAs via electrochemical anodization of Ti foil. The as-anodized amorphous TiO2 is not stable and can react with H2O in solution producing soluble Ti(OH)62− to form anatase nanoparticles (NPs) via water-induced dissolution and recrystallization. The pH and salt content in the solution play important roles in the morphology and composition of the hydrothermal products. In the presence of a metal acetate, the reaction between Ti(OH)62− and H+ is dramatically restricted and the reaction proceeds preferentially between Ti(OH)62− and M2+ (M = Zn, Co, Ni) to produce insoluble MTiO3 NPs which adhere onto the original architecture in situ to form perovskite-type MTiO3/TiO2 NTAs. This study elucidates the role of the amorphous structure in the formation of MTiO3 and provides a general means of synthesizing nanostructured MTiO3.

Graphical abstract: Hydrothermal synthesis of perovskite-type MTiO3 (M = Zn, Co, Ni)/TiO2 nanotube arrays from an amorphous TiO2 template

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Publication details

The article was received on 17 May 2014, accepted on 31 Jul 2014 and first published on 07 Oct 2014


Article type: Paper
DOI: 10.1039/C4CE00992D
CrystEngComm, 2014,16, 10280-10285

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    Hydrothermal synthesis of perovskite-type MTiO3 (M = Zn, Co, Ni)/TiO2 nanotube arrays from an amorphous TiO2 template

    X. Zhang, B. Gao, L. Hu, L. Li, W. Jin, K. Huo and P. K. Chu, CrystEngComm, 2014, 16, 10280
    DOI: 10.1039/C4CE00992D

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