Carbon nanotubes / activated carbon fiber based air filter media for simultaneous removal of particulate matter and ozone

Shen, Yang; Zhu, Zhenxing; Wei, Fei; Yang, Xudong

doi:10.1016/j.buildenv.2017.08.040

Cited by 62 publications

(29 citation statements)

References 53 publications

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“…CNTs were deposited on glass fiber meshes [141,[145][146][147] and inorganic porous foam structures. [148][149][150][151][152] Furthermore, CNTs could be deposited on stainless steel as a substrate material, which upon the attack of supersaturated carbon vapor, generated in situ by the decomposition of a solid organic precursor, acts as a catalyst source to initiate the CNT growth, as shown in Figure 7b. [153] Most commonly, the catalyst is loaded ex situ prior to the CVD process using an aerosol, allowing a nonuniform coating of the catalyst due to a disturbed air flow by nearby fibers.…”

Section: Nonspinning Techniquesmentioning

confidence: 99%

“…[196] To achieve high filter efficiencies, high surface area and roughness are commonly required to enhance pollutant capture. [74,152] This can be achieved by i) oxygen treatment, e.g., yielding AC with high specific surface areas (SSAs), and ii) shaping materials into geometries that allow for high surface-area-to-volume ratios such as fibrous or pleated structures. For fibrous air filters, it can be observed that the smaller the fiber diameter, the higher the effective surface area and filtration efficiencies.…”

Section: Structural Optimizationmentioning

confidence: 99%

See 1 more Smart Citation

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Henning

Abdullayev

Vakifahmetoğlu

et al. 2021

Adv Energy and Sustain Res

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Particulate and gaseous air pollutants pose a threat to human health and contribute to climate change. By today, air filters, stationary and portable, are markedly improved and can often provide innocuous air pollution levels. After introducing the classification and standards on air filters, the influence of the processing route and its parameters on the resulting air filter properties and consequently its performance are discussed. Numerous tools are presented to adjust structural properties such as fiber or pore diameter, specific surface area, surface charge, hydrophilicity, or photocatalytic activity to achieve the desired performance in terms of high filtration efficiencies, sufficient mechanical stability, regeneration eligibility, antimicrobial and optical properties. In particular, inorganic and composite materials as well as nonfibrous structures are covered, which are currently holding an outsider position in an air filter community dominated by polymeric materials and fibrous structures.

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Section: Nonspinning Techniquesmentioning

confidence: 99%

Section: Structural Optimizationmentioning

confidence: 99%

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Henning

Abdullayev

Vakifahmetoğlu

et al. 2021

Adv Energy and Sustain Res

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show abstract

“…Many researchers from different countries had mainly focused on improving filtration efficiency, [12][13][14] in decreasing the costs of filter materials, 15 application sites, 16,17 and in developing new materials. [18][19][20][21][22][23] Results of some researches had been obtained. But still the removal of particulate matters and gassy pollutants is ineffectual.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the structure and properties of modified nonwoven filter fibers by impregnation with carbon black

Zhang

Fan

Wang

et al. 2020

Journal of Engineered Fibers and Fabrics

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With the increasingly serious air pollution, it is urgent to build a good indoor environment. How to improve performance of filter fiber materials has become the mainstream approach. In this article, the structure and filtration performances of nonwoven filter fibers before and after impregnation with carbon black were tested and analyzed. The results showed that a carbon black coating layer was wrapped on the surfaces of the changed nonwoven fabric filter fibers. The porosity of fibers decreased from 97.81% to 95.35%. The filtration efficiency of PM1.0, PM2.5, and PM10 increased by 16.8%, 28.0%, and 11.7%, respectively, at the best filtration velocity of 0.8 m/s. The filtration efficiency of PM2.5 had the most significant improvement. But the resistance increased by 1.18 times at the same time. The matching between filtration efficiency and resistance should be considered in using. This study provides reference value for the synthesis and application of new filter materials.

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“…Over the last two decades, carbon nanotubes (CNT) have attracted attention in the fields of sensors [ 1 ], filtering [ 2 , 3 ], energy storage [ 4 ], and other areas. There are various methods to synthesize CNTs, including arc-discharge [ 5 ], using plasma [ 6 ], laser ablation [ 7 ], chemical vapor deposition (CVD) [ 8 ], and the floating catalyst method [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Sheet-Synthesis and Applications

Chitranshi

Pujari

et al. 2020

Nanomaterials

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Decades of extensive research have matured the development of carbon nanotubes (CNTs). Still, the properties of macroscale assemblages, such as sheets of carbon nanotubes, are not good enough to satisfy many applications. This paper gives an overview of different approaches to synthesize CNTs and then focuses on the floating catalyst method to form CNT sheets. A method is also described in this paper to modify the properties of macroscale carbon nanotube sheets produced by the floating catalyst method. The CNT sheet is modified to form a carbon nanotube hybrid (CNTH) sheet by incorporating metal, ceramic, or other types of nanoparticles into the high-temperature synthesis process to improve and customize the properties of the traditional nanotube sheet. This paper also discusses manufacturing obstacles and the possible commercial applications of the CNT sheet and CNTH sheet. Manufacturing problems include the difficulty of injecting dry nanoparticles uniformly, increasing the output of the process to reduce cost, and safely handling the hydrogen gas generated in the process. Applications for CNT sheet include air and water filtering, energy storage applications, and compositing CNTH sheets to produce apparel with anti-microbial properties to protect the population from infectious diseases. The paper also provides an outlook towards large scale commercialization of CNT material.

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Carbon nanotubes / activated carbon fiber based air filter media for simultaneous removal of particulate matter and ozone

Cited by 62 publications

References 53 publications

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Review on Polymeric, Inorganic, and Composite Materials for Air Filters: From Processing to Properties

Experimental study on the structure and properties of modified nonwoven filter fibers by impregnation with carbon black

Carbon Nanotube Sheet-Synthesis and Applications

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