Morphology and electrical properties of multi-walled carbon nanotube/carbon aerogel prepared by using polyacrylonitrile as precursor

Abstract

Here, we present the synthesis and characterization of low-density Multi-walled carbon nanotube (MWCNT) /carbon (CA) aerogel by creating a three-dimensional assembly of carbon nanotubes (CNTs) in Polyacrylonitrile (PAN)/Dimethyl formamide(DMF) solution to create a stable gel, followed by a CO2 supercritical drying. Aerogels with varying nanotube loading (0-25 wt. %) and density (50-500mg cm -3 ) were fabricated and characterized by optical microscopy, electron microscopy, nitrogen sorption and electrical conductivity analysis. Physical properties of the MWNT/CA composites were highly dependent upon nanotube loading. The data indicate that the shrinkage value decreases gradually during drying and pyrolysis process when MWCNT content increases in formulations. Surface area as high as 735 m 2 /g was achieved for MWNT/PAN aerogel with carbon nanotube loading higher than 20 wt. % .

Fire retardant cellulose aerogel with improved strength and hydrophobic surface by one‐pot method

“…Oil adsorption capacity for it is more than 90 g/g at 30 C. This oil adsorption capacity is relative higher compared with most of these reported absorbents, including some hybrid cellulose aerogels (Figure 5c, see details information in Table S1 in Data S1). [36][37][38][39][40][41][42][43][44] Importantly, it can be easily recovered by mechanical squeezing without destroying its structural integrity, which improves its application in oil removing and environmental remediation.…”

All-Carbon Hybrid Aerogels: Synthesis, Properties, and Applications

“…These aerogels were found to be effective MB adsorbents (Figure ) that were easily separable from solutions after being used. In addition, structures and properties of 3D carbon aerogels, derived from polyacrylonitrile (PAN, used as cross-link agent) solution in DMF and obtained by CO 2 supercritical drying and pyrolysis, were found to be dependent on MWCNTs loading (from 0 to 25 wt %) and PAN concentration . In particular, a high surface area (735 m 2 /g) was reached at 20 wt % loading.…”

High-purity helical carbon nanotubes with enhanced electrochemical properties for supercapacitors

“…With the rapid development of carbon-based materials, diversiform carbon materials can be prepared, such as carbon nanotubes (CNTs), 1 carbon nanobers (CNF), [2][3][4] carbon spheres, 5 carbon aerogel, 6 carbon nanocoils (CNC), 7 graphene and so on. [8][9][10][11][12][13] Due to the unique structure and outstanding electronic properties, these carbon materials play signicant roles in various elds, especially in energy storage areas such as Li-ion batteries and supercapacitors. 14,15 Moreover, the discovery of a helical carbon structure has attracted increasing attentions because of its excellent elasticity and high specic surface area.…”