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<p>Removal of particulate matter (PM) from air is of great importance to improve air quality and safeguard human health. Air purification using water-based filters has attracted widespread attention as a result of good PM purification efficiency and anticlogging performance. However, the existing water-based filters still rely on the random thermal motion of PM, which limits their application potential. Combining electrostatic adsorption with water-based filters can overcome this limitation and enhance gas–liquid interfacial mass transfer. Here we design a triboelectric air filter combining bubble gating and flow-guiding plates, leveraging bubble-induced electrostatic potentials to achieve rapid air purification. Bubble accumulation and transient pulses generate electrostatic potentials as high as −3.3 kV in aqueous environments. The in situ generated electrostatic force effectively captures PM within bubbles, achieving an air purification efficiency of 95.5% for PM<sub>1.0</sub> and up to 99.8% for PM<sub>2.5</sub>. The practical applicability of the triboelectric air filter is further demonstrated for treating car exhaust gas. Overall, this study presents a viable strategy for efficient air purification using water-based filters.</p>

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Pulsed bubble-induced ultrahigh electrostatic potentials for triboelectric air purification

  • 期刊论文

  • 发表日期：

    2026年5月6日

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  • Tao Liu,
  • Xue Cui,
  • Kang Yu,
  • Xuedi Li,
  • Ziyi Ye,
  • Rongrong Liang,
  • Song Zhang,
  • Bin Luo,
  • Shuangfei Wang,
  • Shuangxi Nie

摘要

Removal of particulate matter (PM) from air is of great importance to improve air quality and safeguard human health. Air purification using water-based filters has attracted widespread attention as a result of good PM purification efficiency and anticlogging performance. However, the existing water-based filters still rely on the random thermal motion of PM, which limits their application potential. Combining electrostatic adsorption with water-based filters can overcome this limitation and enhance gas–liquid interfacial mass transfer. Here we design a triboelectric air filter combining bubble gating and flow-guiding plates, leveraging bubble-induced electrostatic potentials to achieve rapid air purification. Bubble accumulation and transient pulses generate electrostatic potentials as high as −3.3 kV in aqueous environments. The in situ generated electrostatic force effectively captures PM within bubbles, achieving an air purification efficiency of 95.5% for PM1.0 and up to 99.8% for PM2.5. The practical applicability of the triboelectric air filter is further demonstrated for treating car exhaust gas. Overall, this study presents a viable strategy for efficient air purification using water-based filters.