1 research outputs found
Al-Coated Conductive Fibrous Filter with Low Pressure Drop for Efficient Electrostatic Capture of Ultrafine Particulate Pollutants
Here, we demonstrate
a new strategy of air filtration based on an Al-coated conductive
fibrous filter for high efficient nanoparticulate removals. The conductive
fibrous filter was fabricated by a direct decomposition of Al precursor
ink, AlH<sub>3</sub>{OÂ(C<sub>4</sub>H<sub>9</sub>)<sub>2</sub>}, onto
surfaces of a polyester air filter via a cost-effective and scalable
solution-dipping process. The prepared conductive filters showed a
low sheet resistance (<1.0 Ω sq<sup>–1</sup>), robust
mechanical durability and high oxidative stability. By electrostatic
force between the charged fibers and particles, the ultrafine particles
of 30–400 nm in size were captured with a removal efficiency
of ∼99.99%. Moreover, the conductive filters exhibited excellent
performances in terms of the pressure drop (∼4.9 Pa at 10 cm
s<sup>–1</sup>), quality factor (∼2.2 Pa<sup>–1</sup> at 10 cm s<sup>–1</sup>), and dust holding capacity (12.5
μg mm<sup>–2</sup>). After being cleaned by water, the
filtration efficiency and pressure drop of the conductive filter was
perfectly recovered, which indicates its good recyclability. It is
expected that these promising features make the conductive fibrous
filter have a great potential for use in low-cost and energy-efficient
air cleaning devices as well as other relevant research areas