Aerogels from copper (II)-cellulose nanofibers and carbon nanotubes as absorbents for the elimination of toxic gases from air

Vipin, Adavan Kiliyankil; Fugetsu, Bunshi; Sakata, Ichiro; Wang, Zhipeng; Endo, Morinobu

doi:10.1016/j.jcis.2020.08.100

Cited by 38 publications

(11 citation statements)

References 42 publications

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“…In a recent paper, Kiliyankil et al [ 6 ] removed odorous gases (i.e., ammonia, hydrogen sulfide, methyl mercaptan, trimethylamine) from the air, using NFC-based aerogels loaded with nanoparticles (NPs) of metal compounds (such as copper, cobalt, and nickel). The NFC-based aerogels were obtained via a freeze-drying method, starting from NFC gels loaded with metal nanoparticles; carbon nanotubes (CNTs) were also incorporated in the NFC aerogels, in order to increase their surface area and improve their mechanical characteristics.…”

Section: Cellulose-based Aerogelsmentioning

confidence: 99%

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Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

2021

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Aerogels are open, three-dimensional, porous materials characterized by outstanding properties, such as low density, high porosity, and high surface area. They have been used in various fields as adsorbents, catalysts, materials for thermal insulation, or matrices for drug delivery. Aerogels have been successfully used for environmental applications to eliminate toxic and harmful substances—such as metal ions or organic dyes—contained in wastewater, and pollutants—including aromatic or oxygenated volatile organic compounds (VOCs)—contained in the air. This updated review on the use of different aerogels—for instance, graphene oxide-, cellulose-, chitosan-, and silica-based aerogels—provides information on their various applications in removing pollutants, the results obtained, and potential future developments.

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Section: Cellulose-based Aerogelsmentioning

confidence: 99%

“…In addition to aerogels based on a single material, the production of composites consisting of different materials is of interest in presenting the chance to tailor and improve the properties of aerogels, such as water-affinity, mechanical resistance, and their performance for specific applications [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

2021

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“…Woo et al [ 18 ] suggested that the carboxylate content in CNF reacts with copper (II) ions to form stable CNF-Cu. The reaction between CNF and Cu occurs at room temperature and is accompanied by gelation.…”

Section: Resultsmentioning

confidence: 99%

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

2022

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This study investigates the quenching behavior and heat transfer characteristics of a copper cube immersed in cellulose nanofiber (CNF) solutions. The heat transfer performance of CNF solutions during boiling has been examined in several studies, but the quenching behavior of CNF solutions, which is an important heat transfer method, has not been evaluated. In this study, four copper cubes with the same dimensions and four different quenchants (deionized water and 0.01%, 0.1% and 0.5% CNF solutions) were prepared. A copper cube heated to greater than 600 °C was submerged three times in the quenchant. This was repeated with different copper cubes in each of the quenchants. The time at which the heated copper cube convectively transferred heat to the surroundings was recorded. The cooling time was shortest when the cube was immersed in a 0.5% CNF solution for the first time. The average cooling time for quenching in the 0.5% CNF solution was 30.3% shorter than that in DI water. In this study, film boiling during quenching was thoroughly observed and analyzed to explain the cause of enhancement in heat transfer efficiency.

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“…Firstly, they have been reported as adsorption and purification materials. [187,188] For example, a nitrogen-doped carbon aerogel has a very high carbon dioxide absorption capacity (~16 wt%). [189] As shown in Fig.…”

Section: Applications Of Htrasmentioning

confidence: 99%

Design, Synthesis, and Use of High Temperature Resistant Aerogels Exceeding 800 oC

Hu¹,

Liu²,

Zhao³

et al. 2021

ES Mater. Manuf.

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As a type of ultra-light and super thermal insulation solid state porous materials, aerogels have attracted increasing attention for aerospace, transportation, and building insulation applications. However, when aerogels are applied in these fields, resistance to high temperature is a prerequisite for them. The most traditional silica aerogels can resist up to 600 ℃, but their porous structures are destroyed at higher temperatures and no longer possess the excellent thermal insulation capacity and low density. Though a great number of new aerogels have been reported in the past two decades, the number of aerogels that could resist to ultra-high temperature, e.g. >800 ℃, is relative few. Nevertheless, it's exciting to see that more and more aerogels that can resist to temperatures higher than 1000 ℃, and even up to 1500 ℃, have been reported in the past few years. This paper gives an overview of aerogels that could resist to more than 800 ℃, and they defined as high temperature resistant aerogels (HTRAs) in this review. The synthetic strategies, mechanisms, chemical compositions, and specific applications of the HTRAs will be reviewed and discussed. This paper would be a timely review to summarized the most recent progress in the HTRAs, and provide insights into the designing of various HTRAs.

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Aerogels from copper (II)-cellulose nanofibers and carbon nanotubes as absorbents for the elimination of toxic gases from air

Cited by 38 publications

References 42 publications

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

Design, Synthesis, and Use of High Temperature Resistant Aerogels Exceeding 800 oC

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