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<p>Vanadium dioxide (VO<sub>2</sub>) exhibits optical regulation properties in the solar band through a thermally induced insulator-to-metal phase transition near 68 ℃. Tungsten doping can decrease the VO<sub>2</sub> phase transition temperature (<i>Tc</i>) to near room temperature and enhance its applicability in smart windows for building energy saving. The optical regulation performance of tungsten-doped VO<sub>2</sub> (W-VO<sub>2</sub>) is crucial for its smart window applications and varies with doping concentration. In this work, W-VO<sub>2</sub> nanoparticles were synthesized via a facile one-step hydrothermal method, and the effects of W doping on the <i>Tc</i> and particle morphology were systematically analyzed. This approach achieved a low <i>Tc</i> and improved optical performance without complex post-processing. The optical performance in the solar band was investigated with different doping concentrations ranging from 0.0 at to 2.0 at%. The sizes of the W-VO<sub>2</sub> nanoparticles ranged from 34.9 to 45.2&#xa0;nm in diameter. The <i>Tc</i> decreased with increasing doping concentration and reached as low as 29.9 ℃ upon heating at a doping concentration of 2.0 at%. The W-VO<sub>2</sub>/PVP composite films exhibited excellent thermochromic performance. The luminous transmittance reached 52.71% and the solar modulation efficiency was up to 11.75% at a doping concentration of 1.0 at% and a volume fraction of 1.29%. These results demonstrate the potential of VO<sub>2</sub> nanoparticles in energy-saving smart window applications as a high-performance, low-cost material.</p>

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One-step hydrothermal synthesis of tungsten-doped VO2(M) nanoparticles for application in thermochromic smart windows

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • Jiran Liang,
  • Yong Yu,
  • Yunfei Bai,
  • Yingfu Zhang,
  • Tong Wu,
  • Dequan Zhang,
  • Dangyuan Lei

摘要

Vanadium dioxide (VO2) exhibits optical regulation properties in the solar band through a thermally induced insulator-to-metal phase transition near 68 ℃. Tungsten doping can decrease the VO2 phase transition temperature (Tc) to near room temperature and enhance its applicability in smart windows for building energy saving. The optical regulation performance of tungsten-doped VO2 (W-VO2) is crucial for its smart window applications and varies with doping concentration. In this work, W-VO2 nanoparticles were synthesized via a facile one-step hydrothermal method, and the effects of W doping on the Tc and particle morphology were systematically analyzed. This approach achieved a low Tc and improved optical performance without complex post-processing. The optical performance in the solar band was investigated with different doping concentrations ranging from 0.0 at to 2.0 at%. The sizes of the W-VO2 nanoparticles ranged from 34.9 to 45.2 nm in diameter. The Tc decreased with increasing doping concentration and reached as low as 29.9 ℃ upon heating at a doping concentration of 2.0 at%. The W-VO2/PVP composite films exhibited excellent thermochromic performance. The luminous transmittance reached 52.71% and the solar modulation efficiency was up to 11.75% at a doping concentration of 1.0 at% and a volume fraction of 1.29%. These results demonstrate the potential of VO2 nanoparticles in energy-saving smart window applications as a high-performance, low-cost material.