Abstract
Mixed metal oxides of tin with strontium (xSnO2.SrO) in different molar ratio {where x = 1 (1), 2 (2), 4(3); SnO2 doped with Sr+2(4), SnO2 doped with Sr+2 and co-doped with F−(5)} have been prepared by sol–gel technology in basic medium using SnCl2.2H2O as precursor in isopropanol as solvent. Structural analysis by XRD patterns have shown formation of particles at nanoscale and phase separation of SnO2 in tetragonal rutile framework in these mixed metal oxides. This fact was further supported by TEM. SEM images of all these samples have shown formation of various geometrical patterns ranging from spherical particles to nanorods. In the IR spectra of all these oxides, Sr–O absorption bands were present only in sample (1). UV–Vis spectroscopy has shown reduction in optical band gap in mixed metal oxides and the lowest value of band gap was observed for sample (3). Photoluminescence spectra of all these derivatives are found to be almost similar again indicated retention of tetragonal rutile SnO2 framework. I–V curves of all these oxides are non-linear and lowest resistance was observed for sample (3). This fact was further supported by impedance measurements.
Highlights
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Mixed metal oxides of SnO2 and SrO in different stoichiometric ratios have been prepared by sol–gel technology in basic medium.
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XRD patterns have shown separation of phases and retention of tetragonal rutile framework in SnO2.
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SEM images have shown formation of various geometrical patterns ranging from spherical particles to nanorods.
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UV–Vis spectroscopy has shown reduction in optical band gap in these mixed metal oxides.
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IV curves and impedance measurements have shown comparatively high conductance in sample (3).
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Acknowledgements
V Sharma is thankful to UGC- New Delhi for financial support (No. MS-37/304004/XII/13-14/CRO dated 19 January 2015). We are thankful to Material Research Center, MNIT, Jaipur Rajasthan for providing all technical support.
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sharma, V., Prajapati, R.C. Synthesis of mixed metal oxide nanoparticles of SnO2 with SrO via sol–gel technology: their structural, optical, and electrical properties. J Sol-Gel Sci Technol 87, 41–49 (2018). https://doi.org/10.1007/s10971-018-4718-7
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DOI: https://doi.org/10.1007/s10971-018-4718-7