Atmosphere (Aug 2022)

Electric Field-Driven Air Purification Filter for High Efficiency Removal of PM<sub>2.5</sub> and SO<sub>2</sub>: Local Electric Field Induction and External Electric Field Enhancement

  • Jian Li,
  • Qingyun Sun,
  • Zhongxin Ping,
  • Yihong Gao,
  • Peiyu Chen,
  • Fangzhi Huang

DOI
https://doi.org/10.3390/atmos13081260
Journal volume & issue
Vol. 13, no. 8
p. 1260

Abstract

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Removal rate and durability are the two most important parameters of an ideal air purification filter to remove inhalable particles and toxic gases. Here, based on the interaction of a local electric field and an external electric field, a novel coaxial core–shell CuO@NH2-MIL-53(Al) nanowire array was synthesized on a rigid copper net, which was used to remove PM2.5 and SO2 simultaneously. The removal rates of PM2.5 by the filter with and without an external electric field can reach 98.72% and 44.41%, respectively, and the adsorption capacity of SO2 can reach 4.87 mol/m2. After repeated filtration and cleaning for 10 cycles, the air pollution removal efficiency can be kept almost stable.

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