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Abstract <p>This study employed a complex tin hydroxychloride compound [Sn<sub>21</sub>Cl<sub>16</sub>(OH)<sub>14</sub>O<sub>6</sub>] as a precursor to achieve the one-step synthesis of SnO<sub>2</sub> nanocomposites via a low-temperature solid-liquid reaction method under ambient pressure. By adjusting the mass ratio of the sulfur source (Na<sub>2</sub>S·5H<sub>2</sub>O) to the precursor (1 : 0.5–1 : 2), the phase composition of the product could be tuned from a SnS/SnO<sub>2</sub> mixed phase to a pure SnO<sub>2</sub> phase, effectively controlling the material’s microstructure. The synthesized SnO<sub>2</sub> nanocrystals were smaller than 10 nm, with a specific surface area of 127.74 m<sup>2</sup>/g, and an optical band gap of approximately 3.63 eV, exhibiting a typical mesoporous structure and broad-spectrum photoresponse. This method features a low reaction temperature (84°C) and a simple process, providing an efficient and controllable route for the low-temperature, energy-saving synthesis of SnO<sub>2</sub> nanomaterials.</p>

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Facile Synthesis of SnO2 Nanocrystals through a Precursor-Mediated Solid-Liquid Process

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Baoyan Liang,
  • Jingtao Wu

摘要

Abstract

This study employed a complex tin hydroxychloride compound [Sn21Cl16(OH)14O6] as a precursor to achieve the one-step synthesis of SnO2 nanocomposites via a low-temperature solid-liquid reaction method under ambient pressure. By adjusting the mass ratio of the sulfur source (Na2S·5H2O) to the precursor (1 : 0.5–1 : 2), the phase composition of the product could be tuned from a SnS/SnO2 mixed phase to a pure SnO2 phase, effectively controlling the material’s microstructure. The synthesized SnO2 nanocrystals were smaller than 10 nm, with a specific surface area of 127.74 m2/g, and an optical band gap of approximately 3.63 eV, exhibiting a typical mesoporous structure and broad-spectrum photoresponse. This method features a low reaction temperature (84°C) and a simple process, providing an efficient and controllable route for the low-temperature, energy-saving synthesis of SnO2 nanomaterials.