Triboelectric nanogenerator enhanced multilayered antibacterial nanofiber air filters for efficient removal of ultrafine particulate matter

Gu, Guang Qin; Han, Chang Bao; Tian, Jing; Jiang, Tao; He, Chuan; Lu, Cun Xin; Bai, Yu; Nie, Jin Hui; Zhou, Li; Wang, Zhong Lin

doi:10.1007/s12274-018-1992-1

Cited by 86 publications

(41 citation statements)

References 56 publications

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“…The antibacterial performance of chitosan-based materials could be ascribed to the surface charge, which leads to the permeation of the cytoplasmic membrane through electrostatic interaction between the bacteria and antibacterial materials, leading to the leakage of intracellular constituents and the death of bacteria. Furthermore, the membrane was capable of inhibiting the reproduction of bacteria by chelating the trace metal (Gu et al., 2018, Wang et al., 2018).…”

Section: Resultsmentioning

confidence: 99%

Transparent Antibacterial Nanofiber Air Filters with Highly Efficient Moisture Resistance for Sustainable Particulate Matter Capture

Liu

Huang

Mao³

et al. 2019

iScience

115

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Summary Particulate matter (PM) pollution has posed great threat to human health. This calls for versatile protection or treatment devices that are both efficient and easy to use. Herein, we have rationally designed a novel reusable bilayer fibrous filter consisting of electrospun superhydrophobic poly(methylmethacrylate)/polydimethylsiloxane fibers as the barrier for moisture ingression and superhydrophilic chitosan fibers for a PM capture efficiency of over 96% at optical transmittance of 86%. Furthermore, it could realize a high-level PM 2.5 capture efficiency (>98.23%) even after 100-h test during extremely hazardous air environment (PM 2.5 > 3,000 μg m −3 ) and retain a high PM removal efficiency (PM 2.5 > 98.39%) after five washing cycles. Besides, such membranes possessed high antibacterial activity at 96.5% for E. coli and 95.2% for Staphylococcus aureus . As a proof-of-concept study, continuous particle removing has been successfully demonstrated on a window screen to prevent particle pollution.

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Section: Resultsmentioning

confidence: 99%

Transparent Antibacterial Nanofiber Air Filters with Highly Efficient Moisture Resistance for Sustainable Particulate Matter Capture

Liu

Huang

Mao³

et al. 2019

iScience

115

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“…Hence, action is urgently needed to seek effective technologies to remove airborne PMs or other pollutants. TENG has been successfully developed to realize efficient air filtering [110,172,[175][176][177] and vehicle emission treatment [173,178]. In fact, TENG-based air purification products are already available in the market [174].…”

Section: Chemical and Environmental Monitoringmentioning

confidence: 99%

Self-Powered Sensors and Systems Based on Nanogenerators

Cheng

Wang

2020

Sensors

Self Cite

227

119

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Sensor networks are essential for the development of the Internet of Things and the smart city. A general sensor, especially a mobile sensor, has to be driven by a power unit. When considering the high mobility, wide distribution and wireless operation of the sensors, their sustainable operation remains a critical challenge owing to the limited lifetime of an energy storage unit. In 2006, Wang proposed the concept of self-powered sensors/system, which harvests ambient energy to continuously drive a sensor without the use of an external power source. Based on the piezoelectric nanogenerator (PENG) and triboelectric nanogenerator (TENG), extensive studies have focused on self-powered sensors. TENG and PENG, as effective mechanical-to-electricity energy conversion technologies, have been used not only as power sources but also as active sensing devices in many application fields, including physical sensors, wearable devices, biomedical and health care, human–machine interface, chemical and environmental monitoring, smart traffic, smart cities, robotics, and fiber and fabric sensors. In this review, we systematically summarize the progress made by TENG and PENG in those application fields. A perspective will be given about the future of self-powered sensors.

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“…To overcome the challenge, continuous electrostatic charging of the airborne PM and/or the filter material was proposed as a promising method. [ 19–29 ] Most of these trials are however based on medium‐high efficiency filters. These filters are either thin membranes to have limited dust‐holding capacity or have equivalently >50 Pa air resistance at 1 m s −1 filtration velocity.…”

Section: Introductionmentioning

confidence: 99%

Ultralow Resistance Two‐Stage Electrostatically Assisted Air Filtration by Polydopamine Coated PET Coarse Filter

Tian

Gao

et al. 2021

Small

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Airborne particulate matters (PM) pose serious health threats to the population, and efficient filtration is needed for indoor and vehicular environments. However, there is an intrinsic conflict between filtration efficiency, air resistance, and service life. In this study, a two‐stage electrostatically assisted air (EAA) filtration device is designed and the efficiency‐air resistance‐filter life envelope is significantly improved by a thin coating of polydopamine (PDA) on the polyethylene terephthalate (PET) coarse filter by in situ dopamine polymerization. The 8 mm thick EAA PDA‐140@PET filter has a high filtration efficiency of 99.48% for 0.3 µm particles, low air resistance of 9.5 Pa at a filtration velocity of 0.4 m s−1, and steady performance up to 30 d. Compared with the bare PET filter, the penetration rate for 0.3 µm particles is lowered by 20×. The coated PDA is of submicron thickness, 10−3 × the gap distance between filter fibers, so low air resistance could be maintained. The filter shows steadily high filtration efficiency and an acceptable increase of air resistance and holds nearly as many particles as its own weight in a 30 day long‐term test. The working mechanism of the EAA coarse filter is investigated, and the materials design criteria are proposed.

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Triboelectric nanogenerator enhanced multilayered antibacterial nanofiber air filters for efficient removal of ultrafine particulate matter

Cited by 86 publications

References 56 publications

Transparent Antibacterial Nanofiber Air Filters with Highly Efficient Moisture Resistance for Sustainable Particulate Matter Capture

Transparent Antibacterial Nanofiber Air Filters with Highly Efficient Moisture Resistance for Sustainable Particulate Matter Capture

Self-Powered Sensors and Systems Based on Nanogenerators

Ultralow Resistance Two‐Stage Electrostatically Assisted Air Filtration by Polydopamine Coated PET Coarse Filter

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