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Issue 9, 2018
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Sn4+ doping induced novel morphological evolution in zinc titanate heteronanostructures and studies on their optical properties

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Abstract

The present study reports Sn4+ doping induced novel morphological evolution in zinc titanate heteronanostructures synthesized using Sn4+ substituted Zn–Ti glycolates as precursors. First, Sn4+ substituted Zn–Ti glycolates with a wide range of tin concentrations (5%, 10%, 20% and 50%) were synthesized by an ethylene glycol mediated route. The precursors were calcined at 500 °C and 700 °C to obtain the Sn4+ doped zinc titanates. Powder X-ray diffraction studies demonstrate the formation of Sn4+ substituted Zn–Ti glycolates in the precursors. Zn2TiO4 is formed upon calcination of pure Zn–Ti glycolate. Sn4+ doped ZnTiO3 is produced after the calcination of Zn–Ti glycolates prepared using lower tin concentrations (e.g. 5% and 10%) and a mixture of SnO2 and Sn4+ doped ZnTiO3 is formed after the calcination of Zn–Ti glycolates prepared using higher tin concentrations (e.g. 20% and 50%). The morphology of pure Zn–Ti glycolate is spherical which changes to rod-like morphology upon incorporation of Sn4+ (5% to 20%). The width of the rod-like particles increases upon increasing the concentration of Sn4+ further and hexagonal prism-like particles are obtained in the case of the Zn–Ti glycolate prepared using 50% of Sn4+. The morphology of zinc titanates is retained as that of the corresponding Zn–Ti glycolates after calcination at 500 °C and 700 °C. The band gap of the tin doped zinc titanates can be tuned from 3.2 to 3.7 eV by varying the dopant concentration and calcination temperature.

Graphical abstract: Sn4+ doping induced novel morphological evolution in zinc titanate heteronanostructures and studies on their optical properties

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Publication details

The article was received on 21 Nov 2017, accepted on 29 Mar 2018 and first published on 02 Apr 2018


Article type: Paper
DOI: 10.1039/C7NJ04530A
Citation: New J. Chem., 2018,42, 7468-7479
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    Sn4+ doping induced novel morphological evolution in zinc titanate heteronanostructures and studies on their optical properties

    U. Sharma and J. Pethaiyan, New J. Chem., 2018, 42, 7468
    DOI: 10.1039/C7NJ04530A

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