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<p>This study presents the synthesis of SnO₂-ZnS nanocomposites using a one-step hydrothermal sintering technique with precursor ratios of 25:75, 50:50, and 75:25. Characterization techniques confirmed the successful formation of the composites. XRD analysis indicated the occurrence of tetragonal SnO₂ and cubic ZnS phases with crystallite sizes between 20 and 40&#xa0;nm. EDAX and FTIR analyses validated the elemental composition and functional groups of the nanocomposites. The crystallite size, dislocation density, and lattice strain were determined using the W–H and Scherrer formulas, with the phase combination further confirmed by the Rietveld refinement. UV–Visible spectrometer analysis showed a blue shift for all ratios, with an excitation wavelength around 332&#xa0;nm. SEM micrographs revealed spherical cluster morphology for all ratios. Electrical analysis, performed using an LCR meter and Keithley 6514 electrometer, demonstrated a high dielectric constant at low frequencies, which decreased with lower ZnS concentration. Enhanced photo response characteristics were also observed.</p>

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Enhanced photoconductivity in SnO2-ZnS nanocomposites: nano-structural, optical, and electrical investigations

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Alison Christina Fernandez,
  • Sakthivel P,
  • Gopala Krishnan V,
  • Priyadharsini N

摘要

This study presents the synthesis of SnO₂-ZnS nanocomposites using a one-step hydrothermal sintering technique with precursor ratios of 25:75, 50:50, and 75:25. Characterization techniques confirmed the successful formation of the composites. XRD analysis indicated the occurrence of tetragonal SnO₂ and cubic ZnS phases with crystallite sizes between 20 and 40 nm. EDAX and FTIR analyses validated the elemental composition and functional groups of the nanocomposites. The crystallite size, dislocation density, and lattice strain were determined using the W–H and Scherrer formulas, with the phase combination further confirmed by the Rietveld refinement. UV–Visible spectrometer analysis showed a blue shift for all ratios, with an excitation wavelength around 332 nm. SEM micrographs revealed spherical cluster morphology for all ratios. Electrical analysis, performed using an LCR meter and Keithley 6514 electrometer, demonstrated a high dielectric constant at low frequencies, which decreased with lower ZnS concentration. Enhanced photo response characteristics were also observed.