Transparent air filter for high-efficiency PM2.5 capture

Liu, Chong; Hsu, Po‐Chun; Lee, Hyun‐Wook; Ye, Meng; Zheng, Guangyuan; Liu, Nian; Li, Weiyang; Cui, Yi

doi:10.1038/ncomms7205

Cited by 744 publications

(795 citation statements)

References 28 publications

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“…Visual microscopy also reveals many mesopores and micropores over an assembly of ultrafine fibers (the so-called electrospun mat). These structural features make electrospun materials quite suitable for activities that require a high degree of physical contact such as providing active sites for physicochemical interactions (e.g., catalysis and adsorption) [21][22][23] or the capture of small particulate materials by physical entanglement (i.e., air filtration) [24][25][26]. In our previous work, we prepared a nanofibrous, porous amidoxime-based adsorbent by electrospinning for uranium extraction from seawater and successfully improved the utility of the functional group, amidoxime, for coordination with uranyl ions [27].…”

Section: Introductionmentioning

confidence: 99%

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Zhang

et al. 2016

Sci. China Mater.

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(Li J)) most common byproducts of the paint manufacture, dyeing, cosmetics, textile, paper, leather, and other industries, and it can poison the environment and endanger the safety of drinking water and foodstuffs [5,6]. Therefore, removal of organic dye from water is a major project for the development of a sustainable society [7].Adsorption is recognized as one of the most promising methods because of its high effectiveness, low cost, and popularity [8,9]. Polymeric adsorbents are widely used as materials for the removal of organic or inorganic contaminants from water or air because of their advantages such as high flexibility in the design of structures and properties; chemical stability in harsh environments, including strong acidic, alkaline, salty, and oxidizing solutions; feasible regeneration; and thermal durability [9][10][11]. Polyethylenimine (PEI) has a high amine density and accessible primary amine sites on the chain ends, which act as desirable building blocks for the construction of adsorbents. For instance, many excellent CO 2 adsorbents have been prepared by integrating PEI into porous materials, including silica [12], mesoporous carbon [13], titanate [14], polymeric supports [15], and other metal oxide nanocomposites [16]. In addition, because of the high positive charge density on the protonated PEI backbone or side chains, PEI-based adsorbents exhibit good adsorption capacity for acidic gas or anionic materials such as polyanions and negatively charged organic or inorganic matter, including various anionic dyes [16][17][18][19].Electrospinning is an effective approach to prepare ultrafine fibers; it uses an electrostatic force from an external high-voltage electrical field between a spinneret and a grounded collector to draw very fine (typically micro-to nanoscale) fibers from a liquid droplet [20]. The ultrafine fibers produced by electrospinning have very high specific ABSTRACT We prepared a nanofibrous adsorbent for anionic dye removal from aqueous solution by electrospinning a modified polyethylenimine (m-PEI) and polyvinylidene fluoride (PVDF) blend. The electrospun nanofibrous adsorbent was confirmed to be a nanoscale, porous material with a positively charged surface; these characteristics are quite beneficial for anionic contaminant adsorption. Experimental adsorption of an anionic dye, methyl orange (MO), demonstrates that this adsorbent can rapidly remove MO from aqueous solution; its maximum adsorption capacity was 633.3 mg g −1 , which is much higher than that of previously reported adsorbents. After immersion in a basic solution, the adsorbent was well regenerated and showed good recyclability. The adsorption performance of the nanofibrous adsorbent is greatly influenced by the temperature, initial MO concentration, and pH of the solution. We further found that MO adsorption onto the adsorbent can be described well by the pseudo-second-order kinetic model and Langmuir isotherm model. Weber-Morris plots suggested that the adsorption of MO onto the nanofibrous mat was affected...

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Section: Introductionmentioning

confidence: 99%

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Zhang

et al. 2016

Sci. China Mater.

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“…Many reviews [2][3][4][5] into nanofibres have been published which investigate ever more uses for these amazing materials from many production methods. The applications that show significant promise for these materials include biomedical applications (drug delivery and tissue engineering scaffolds) [6][7][8][9], energy storage devices (lithium ion batteries) [10][11][12], and also air and water filtration applications [13][14][15]. Polymer nanofibres possess a very high surface area to volume ratio resulting in attractive applications where this property is advantageous.…”

Section: Introductionmentioning

confidence: 99%

PA6 Nanofibre Production: A Comparison between Rotary Jet Spinning and Electrospinning

Rogalski

Bastiaansen

Peijs

2018

Fibers

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Abstract:Polymer nanofibres are created from many different techniques, with varying rates of production. Rotary jet spinning is a relatively new technique for making nanofibres from both polymer solutions and melt. With electrospinning being by far the most widespread processing method for polymer nanofibres, we performed a direct comparison of polyamide 6 (PA6) nanofibre production between these two methods. It was found that electrospinning produced slightly smaller-diameter fibres, which scaled with a decrease in solution viscosity. In comparison, rotary jet spun fibres could be produced from a reduced range of polymer concentrations and exhibited therefore slightly larger diameters with greater variation. Crystallinity of the fibres was also compared between the two techniques and the bulk polymer, which showed a decrease in crystallinity compared to bulk PA6.

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“…The PM was generated by burning incense and contained particles of sizes from <0.3 µm to >10 µm. 26,27 The PM 2.5 concentration data in the chamber was obtained using an air-quality monitor (BR-SMART 126, Bramc). Temperature data was measured using a digital thermometer (Testo 174T, TESTO).…”

Section: Resultsmentioning

confidence: 99%

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

Kim

et al. 2017

AIP Advances

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In this study, we report for the first time on the convection phenomenon for the consistent and sensitive detection of target materials (particulate matter (PM) or gases) with a high-performance transparent heater. The high-performance transparent heater, based on Pt-decorated Ni micromesh, was fabricated by a combination of transfer printing process and Pt sputtering. The resulting transparent heater exhibited excellent mechanical durability, adhesion with substrates, flexibility, and heat-generating performance. We monitored the changes in the PM concentration and temperature in an airtight chamber while operating the heater. The temperature in the chamber was increased slightly, and the PM2.5 concentration was increased by approximately 50 times relative to the initial state which PM is deposed in the chamber. We anticipate that our experimental findings will aid in the development and application of heaters for sensors and actuators as well as transparent electrodes and heating devices.

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Transparent air filter for high-efficiency PM2.5 capture

Cited by 744 publications

References 28 publications

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

PA6 Nanofibre Production: A Comparison between Rotary Jet Spinning and Electrospinning

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

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