2007
DOI: 10.1021/jp0714365
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Abstract: Microchannelled 3D architectures composed of multiwall carbon nanotubes (MWCNTs) surface decorated with Pt nanoparticles and chitosan (CHI) are prepared by an ice segregation induced self-assembly (ISISA) process. The microchannelled structures are highly porous (specific gravity ∼10-2) and exhibit excellent electron conductivity (2.5 S·cm-1) thanks to both the high content of MWCNTs (up to 89 wt %) and their interconnection. The Pt/MWCNT/CHI 3D architectures provide remarkable performance as anodes for a dire… Show more

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Cited by 132 publications
(124 citation statements)
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“…74 Microchannelled 3D architectures of MWCNT-chitosan were further decorated with Pt nanoparticles and these materials exhibited high conductivity and could be used as anodes for direct methanol fuel cell. 75 Although water-based ceramic slurries and colloidal suspensions have mostly been used, it may be worth mentioning that a camphene-based freeze-casting route has been studied as an alternative method to fabricate porous ceramics. Camphene can be frozen and easily sublimed near room temperature to form a 3D interconnected porous network.…”
Section: Aqueous Colloidal Suspensionsmentioning
confidence: 99%
“…74 Microchannelled 3D architectures of MWCNT-chitosan were further decorated with Pt nanoparticles and these materials exhibited high conductivity and could be used as anodes for direct methanol fuel cell. 75 Although water-based ceramic slurries and colloidal suspensions have mostly been used, it may be worth mentioning that a camphene-based freeze-casting route has been studied as an alternative method to fabricate porous ceramics. Camphene can be frozen and easily sublimed near room temperature to form a 3D interconnected porous network.…”
Section: Aqueous Colloidal Suspensionsmentioning
confidence: 99%
“…Thus, ISISA processed scaffolds containing conductive entities (e.g., carbon nanotubes) have exhibited enhanced performance as 3D anodes in direct methanol fuel cells. [ 25 ] This feature, in combination with the biocompatible character of the scaffolds that allows bacteria growth and colonization throughout the entire 3D structure [ 26 ] (Figure 2 d), opened the path to the use of these architectures as anodes in microbial fuel cells (MFCs). It is worth noting that the design and preparation of 3D architectures through which bacteria can grow and proliferate is indeed of great help to further improve the performance of this sort of device by enlarging the electrode surface area exposed to the bacterial growth medium and, hence, the energy conversion.…”
Section: Research Newsmentioning
confidence: 99%
“…Chitosan (CHI) was an effective dispersant for generating homogenous, stable MWCNT suspensions (2-8 wt%). 52 Using a process called ice segregation-induced self-assembly (ISISA), the suspensions are unidirectionally frozen via immersion in liquid nitrogen and freeze-dried. The final MWCNT/CHI aerogels are highly porous, electrically conductive, and possess well-aligned microchannels, which can be controlled by freezing rate, direction, and MWCNT concentration (Fig.…”
Section: B Cnt Aerogelmentioning
confidence: 99%