Electrospun heterojunction nanofibrous membranes for photoinduced enhancement of fine particulate matter capture in harsh environment

Ji, Xuzheng; Yang, Yuchen; Gou, Yukui; Yang, Yongchang; Li, Wei; Huang, Jianying; Cai, Weilong; Lai, Yuekun

doi:10.1016/j.seppur.2023.124209

Cited by 11 publications

(3 citation statements)

References 59 publications

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“…It has certain advantages in reducing the electron–hole complexation rate and accelerating carrier migration. , Considering the well-matched valence and conduction bands of g-C 3 N 4 and Bi 2 WO 6 , the formed heterojunction photocatalyst is favored to circumvent the current shortcomings of photocatalytic performance. − According to recent studies, the heterojunction materials formed by Bi 2 WO 6 and g-C 3 N 4 are mostly at the nanoscale, which tend to agglomerate and greatly reduce their active reaction sites . Additionally, incomplete separation and difficult recovery of powder photocatalysts from wastewater can cause secondary pollution to the environment. , Therefore, a reliable catalyst carrier must be added for the composite photocatalysts. Compared to other luminescent fibers, electrospun polyacrylonitrile (PAN) nanofibers have the advantages of lightweight, good flexibility, large specific surface area, insoluble in water, and light and chemical resistance. , Loading Bi 2 WO 6 and g-C 3 N 4 into electrospun PAN nanofibers is promising to solve the problems of recycling and agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Heterojunction Photocatalyst Loaded on Electrospun Nanofibers for Synergistic Enhanced Photocatalysis and Real-Time Temperature Monitoring

Zhang,

Li,

Jiang

et al. 2023

Langmuir

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Bi 2 WO 6 :Ho 3+ , Yb 3+ /g-C 3 N 4 (BHY/CN) photocatalysts are successfully loaded on polyacrylonitrile (PAN) nanofibers by electrospinning technology, which combines an upconversion effect and heterojunctions to achieve dual-functional characteristics. Polymer-modified photocatalytic materials offer a large specific surface area of 24.1 m 2 /g and a pore volume of 0.1 cm 3 /g, promoting the utility of solar energy. The introduction of rare earth ions and g-C 3 N 4 optimizes the structural band gap, which broadens the light absorption range and promotes electron transfer. Moreover, the heterojunction between Bi 2 WO 6 and g-C 3 N 4 has suppressed the complexation of photoinduced carriers, further improving catalytic performance. The optimized photocatalysts have higher photocatalytic activity with degrading 92.6% tetracycline-hydrochloride (120 min) under simulated sunlight irradiation. The optical thermometry has also been achieved based on the fluorescence intensity ratio technique, where the maximum absolute and relative sensitivity values of BHY/CN-1:6@PAN are 3.322% K −1 and 0.842% K −1 , respectively. This dual-functional nanofibers with excellent mechanical properties provide noncontact temperature feedback and efficient catalytic performance for better wastewater treatment and ecological restoration in extreme harsh environments.

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Section: Introductionmentioning

confidence: 99%

Heterojunction Photocatalyst Loaded on Electrospun Nanofibers for Synergistic Enhanced Photocatalysis and Real-Time Temperature Monitoring

Zhang,

Li,

Jiang

et al. 2023

Langmuir

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“…Nevertheless, due to the pseudo-nanoscale fiber diameter (>100 nm), the high-performance electrospun mats of over 99.9% PM 0.3 removal exhibit densely packed structure and thus poor breathing resistance, heat dissipation and moisture diffusion 19 – 22 . Based on electret, triboelectric and piezoelectric effect, moreover, various charged electrospun submicron fibers have been developed to integrate the high filtration efficiency and the low pressure drop of face mask 23 – 31 . Unfortunately, above electro-assisted air filters usually possess the serious drawbacks of charge dissipation and nondurable filtration performance, especially in humid environments 32 .…”

Section: Introductionmentioning

confidence: 99%

Ultrathin, ultralight dual-scale fibrous networks with high-infrared transmittance for high-performance, comfortable and sustainable PM0.3 filter

Yang,

Li,

Zhou

et al. 2024

Nat Commun

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Highly permeable particulate matter (PM) can carry various bacteria, viruses and toxics and pose a serious threat to public health. Nevertheless, current respirators typically sacrifice their thickness and base weight for high-performance filtration, which inevitably causes wearing discomfort and significant consumption of raw materials. Here, we show a facile yet massive splitting eletrospinning strategy to prepare an ultrathin, ultralight and radiative cooling dual-scale fiber membrane with about 80% infrared transmittance for high-protective, comfortable and sustainable air filter. By tailoring antibacterial surfactant-triggered splitting of charged jets, the dual-scale fibrous filter consisting of continuous nanofibers (44 ± 12 nm) and submicron-fibers (159 ± 32 nm) is formed. It presents ultralow thickness (1.49 μm) and base weight (0.57 g m−2) but superior protective performances (about 99.95% PM0.3 removal, durable antibacterial ability) and wearing comfort of low air resistance, high heat dissipation and moisture permeability. Moreover, the ultralight filter can save over 97% polymers than commercial N95 respirator, enabling itself to be sustainable and economical. This work paves the way for designing advanced and sustainable protective materials.

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“…Of all the photocatalysts, TiO 2 is the most stable and cost-effective. It has photocatalytic properties that allow it to decompose adsorbed hazardous substances into harmless ones under light irradiation, generating free radicals capable of destroying many microbial bacteria [38,39]. MOFs are a class of nitrogen-or oxygen-containing polydentate organic ligands and metal centers that self-assemble through coordination, forming a highly ordered crystal structure [40,41].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Poly(Lactic Acid)@TiO2 Electrospun Membrane Decorated with Metal–Organic Frameworks for Efficient Air Filtration and Bacteriostasis

Lin,

Shen,

Qian

et al. 2024

Polymers

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The development of high-performance filtration materials is essential for the effective removal of airborne particles, and metal–organic frameworks (MOFs) anchored to organic polymer matrices are considered to be one of the most promising porous adsorbents for air pollutants. Nowadays, most air filters are generally based on synthetic fiber polymers derived from petroleum residues and have limited functionality, so the use of MOFs in combination with nanofiber air filters has received a lot of attention. Here, a conjugated electrostatic spinning method is demonstrated for the one-step preparation of poly(lactic acid) (PLA) nanofibrous membranes with a bimodal diameter distribution and the anchoring of Zeolitic Imidazolate Framework-8 (ZIF-8) by the introduction of TiO2 and in situ generation to construct favorable multiscale fibers and rough structures. The prepared PLA/TZ maintained a good PM2.5 capture efficiency of 99.97%, a filtration efficiency of 96.43% for PM0.3, and a pressure drop of 96.0 Pa, with the highest quality factor being 0.08449 Pa−1. Additionally, ZIF-8 was uniformly generated on the surface of PLA and TiO2 nanofibers, obtaining a roughened structure and a larger specific surface area. An enhanced filtration retention effect and electrostatic interactions, as well as active free radicals, can be generated for the deep inactivation of bacteria. Compared with the unmodified membrane, PLA/TZ prepared antibacterial characteristics induced by photocatalysis and Zn2+ release, with excellent bactericidal effects against S. aureus and E. coli. Overall, this work may provide a promising approach for the development of efficient biomass-based filtration materials with antimicrobial properties.

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Electrospun heterojunction nanofibrous membranes for photoinduced enhancement of fine particulate matter capture in harsh environment

Cited by 11 publications

References 59 publications

Heterojunction Photocatalyst Loaded on Electrospun Nanofibers for Synergistic Enhanced Photocatalysis and Real-Time Temperature Monitoring

Heterojunction Photocatalyst Loaded on Electrospun Nanofibers for Synergistic Enhanced Photocatalysis and Real-Time Temperature Monitoring

Ultrathin, ultralight dual-scale fibrous networks with high-infrared transmittance for high-performance, comfortable and sustainable PM0.3 filter

Fabrication of Poly(Lactic Acid)@TiO2 Electrospun Membrane Decorated with Metal–Organic Frameworks for Efficient Air Filtration and Bacteriostasis

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