scholarly journals Hierarchically Porous Silk/Activated-Carbon Composite Fibres for Adsorption and Repellence of Volatile Organic Compounds

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1207
Author(s):  
Aled D. Roberts ◽  
Jet-Sing M. Lee ◽  
Adrián Magaz ◽  
Martin W. Smith ◽  
Michael Dennis ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Carbon Composite ◽  
Hierarchically Porous ◽  
Surface Areas ◽  
Regenerated Silk Fibroin ◽  
Volatile Organic ◽  
Fibre Spinning ◽  
Solution Blow Spinning

Fabrics comprised of porous fibres could provide effective passive protection against chemical and biological (CB) threats whilst maintaining high air permeability (breathability). Here, we fabricate hierarchically porous fibres consisting of regenerated silk fibroin (RSF) and activated-carbon (AC) prepared through two fibre spinning techniques in combination with ice-templating—namely cryogenic solution blow spinning (Cryo-SBS) and cryogenic wet-spinning (Cryo-WS). The Cryo-WS RSF fibres had exceptionally small macropores (as low as 0.1 µm) and high specific surface areas (SSAs) of up to 79 m2·g−1. The incorporation of AC could further increase the SSA to 210 m2·g−1 (25 wt.% loading) whilst also increasing adsorption capacity for volatile organic compounds (VOCs).

scholarly journals Hierarchically Porous Silk/Activated-Carbon Composite Fibers for Adsorption and Repellence of Volatile Organic Compounds

2020 ◽  
Author(s):  
Aled D. Roberts ◽  
Jet-Sing M. Lee ◽  
Adrián Magaz ◽  
Martin W. Smith ◽  
Michael Dennis ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Carbon Composite ◽  
Fiber Spinning ◽  
Hierarchically Porous ◽  
Surface Areas ◽  
Regenerated Silk Fibroin ◽  
Volatile Organic ◽  
Porous Fibers

Fabrics comprised of porous fibers could provide effective passive protection against chemical and biological (CB) threats whilst maintaining high air permeability (breathability). Here, we fabricate hierarchically porous fibers consisting of regenerated silk fibroin (RSF) and activated-carbon (AC) prepared through two fiber spinning techniques in combination with ice-templating – namely cryogenic solution blow spinning (Cryo-SBS) and cryogenic wet-spinning (Cryo-WS). The Cryo-WS RSF fibers had exceptionally small macropores (as low as 0.1 µm) and high specific surface areas (SSAs) of up to 79 m2 g-1. The incorporation of AC could further increase the SSA to 210 m2 g-1 (25 wt. % loading) whilst also increasing adsorption capacity for volatile organic compounds (VOCs).

scholarly journals Adsorption of Volatile Organic Compounds in Nitrogen Streams on Oxidized Activated Carbon Fibres

2001 ◽  
Vol 19 (5) ◽  
pp. 423-433 ◽  
Author(s):  
Feiyu Kang ◽  
Zheng-Hong Huang ◽  
Kai-Ming Liang ◽  
Jun-Bing Yang ◽  
Hui Wu
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Specific Surface ◽  
Organic Compounds ◽  
Gravimetric Method ◽  
Carbon Fibres ◽  
Surface Areas ◽  
Volatile Organic ◽  
Specific Surface Areas ◽  
Activated Carbon Fibres

Viscose rayon-based activated carbon fibres (ACFs) with low and high specific surface areas were treated with conc. HNO3, 30 wt% H2O2 and air at different temperatures. The pore textures and surface chemistries of the samples were characterized by nitrogen adsorption at 77 K and X-ray photoelectron spectroscopic (XPS) methods. The adsorption of traces of volatile organic compounds (VOCs), i.e. benzene and methyl ethyl ketone (MEK), in nitrogen streams on the samples wwa measured by a gravimetric method. The results showed that the surface oxygen complexes and pore textures of all the oxidized ACFs were modified and differed depending on whether oxidation had been conducted under gaseous or solution conditions. ACFs with different specific surface areas possessed different adsorption characteristics towards VOC vapours after subjection to oxidation treatment.

scholarly journals Adsorption Characteristics of Trace Volatile Organic Compounds on Activated Carbon Fibres at Room Temperature

2002 ◽  
Vol 20 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Zheng-Hong Huang ◽  
Feiyu Kang ◽  
Yong-Ping Zheng ◽  
Jun-Bing Yang ◽  
Kai-Ming Liang
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Carbon Fibres ◽  
Adsorption Characteristics ◽  
Surface Areas ◽  
Volatile Organic ◽  
Activated Carbon Fibres

The adsorption characteristics of volatile organic compounds (VOCs) on viscose rayon-based activated carbon fibres (ACFs) were investigated. ACFs with specific surface areas of 640 m2/g and 1460 m2/g were used to adsorb trace volatile organic compounds in nitrogen streams at atmospheric pressure at or near room temperature (25°C and 30°C). The experimental results showed that ACFs with different surface areas exhibited different dynamic adsorption behaviours at or near room temperature.

Double-bed-type extraction needle packed with activated-carbon-based sorbents for very volatile organic compounds

2014 ◽  
Vol 88 ◽  
pp. 423-428 ◽  
Author(s):  
Ikuo Ueta ◽  
Emi Liana Samsudin ◽  
Ayako Mizuguchi ◽  
Hayato Takeuchi ◽  
Takumi Shinki ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic ◽  
Carbon Based

scholarly journals Preparation of Nano-Porous Carbon-Silica Composites and Its Adsorption Capacity to Volatile Organic Compounds

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 372 ◽  
Author(s):  
Lipei Fu ◽  
Jiahui Zhu ◽  
Weiqiu Huang ◽  
Jie Fang ◽  
Xianhang Sun ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Adsorption Capacity ◽  
Organic Compounds ◽  
Retention Rate ◽  
Reaction System ◽  
Carbon Powder ◽  
Volatile Organic ◽  
Adsorption Desorption ◽  
Better Than

Carbon-silica composites with nanoporous structures were synthesized for the adsorption of volatile organic compounds (VOCs), taking tetraethyl orthosilicate (TEOS) as the silicon source and activated carbon powder as the carbon source. The preparation conditions were as follows: the pH of the reaction system was 5.5, the hydrophobic modification time was 50 h, and the dosage of activated carbon was 2 wt%. Infrared spectrum analysis showed that the activated carbon was dispersed in the pores of aerogel to form the carbon-silica composites material. The static adsorption experiments, dynamic adsorption-desorption experiments, and regeneration experiments show that the prepared carbon-silica composites have microporous and mesoporous structures, the adsorption capacity for n-hexane is better than that of conventional hydrophobic silica gel, and the desorption performance is better than that of activated carbon. It still has a high retention rate of adsorption capacity after multiple adsorption-desorption cycles. The prepared carbon-silica composites material has good industrial application prospects in oil vapor recovery, providing a new alternative for solving organic waste gas pollution.

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