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Sol–gel synthesis of ZnO–SnO2 nanocomposites and their morphological, structural and optical properties

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In the present work ZnO/SnO2 nanocomposites have been synthesized by sol–gel method. Different samples were prepared by annealing the precipitate at 600 and 750 °C. The structural and morphological studies of ZnO/SnO2 nanocomposites were carried out by XRD, SEM and EDX. Optical properties were studied by UV–Vis and photoluminescence spectroscopy. The increase in the size of the ZnO/SnO2 nanocomposites with the presence of Zn2SnO4 at the higher temperature is observed. The optical band gap of ZnO/SnO2 nanocomposites decreases with the increase in the annealing temperature. The study reveals that the findings will be helpful in the band gap engineering of the ZnO/SnO2 nanocomposites for novel applications. In order to exploit these distinctive properties of ZnO/SnO2 nanocomposites for the realization of nanoscale devices, the effect of temperature on the morphology and optical properties of ZnO/SnO2 nanocomposites were studied. ZnO/SnO2 nanocomposites found potential applications in optoelectronics, photocatalysis, gas sensor and solar cell.

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This work is financially supported by Science and Engineering Research Board, Department of Science & Technology (DST), Govt. of India (Grant No. SERB/F/2139/2013-14). We also thank Dr. Ruchita Pal, Advanced Instrumentation Research Facility (AIRF), Jawaharlal Nehru University, New Delhi for providing SEM/EDX facilities.

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Correspondence to Suresh Kumar.

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Kumar, S., Nigam, R., Kundu, V. et al. Sol–gel synthesis of ZnO–SnO2 nanocomposites and their morphological, structural and optical properties. J Mater Sci: Mater Electron 26, 3268–3274 (2015).

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