Chemisorption of Acetone on Carbon Nanotubes

Chakrapani, Nirupama; Zhang, Yiming M.; Nayak, Saroj K.; Moore, James A.; Carroll, David; Choi, Yoon Young; Ajayan, Pulickel M.

doi:10.1021/jp034970v

Cited by 128 publications

(107 citation statements)

References 31 publications

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“…Here, a water plasma treatment was used to eliminate amorphous carbon. In addition, the treatment introduces oxygen functional groups and defect sites on the CNTs surface that can significantly enhance the adsorption efficiency of contaminants [45][46][47].…”

Section: Adsorption/desorption Studiesmentioning

confidence: 99%

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Amade

Hussain²,

Romero‐Ocaña³

et al. 2014

J Environ Eng Ecol Sci

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Background: Air pollution has become an important issue worldwide due to its adverse health effects. Among the different air contaminants, volatile organic compounds (VOCs) are liquids or solids with a high vapor pressure at room temperature that are extremely dangerous for human health. Removal of these compounds can be achieved using nanomaterials with tailored properties such as carbon nanotubes. Methods: Vertically-aligned multiwall carbon nanotubes (CNTs) were successfully grown on quartz filters by means of plasma enhanced chemical vapor deposition (PECVD). Furthermore, a plasma treatment was performed in order to modify the surface properties of the CNTs. The adsorption/desorption processes of three chlorinated compounds (trichloroethylene, 1,2-dichlorobenzene and chloroform) on the CNTs were studied using mass spectrometry measurements with a residual gas analyzer. Results: The adsorption capability of the CNTs increased after functionalization of their surface with a water plasma treatment. In addition, it was found that the presence of aromatic rings, water solubility and polarity of the VOCs play an important role on the adsorption/desorption kinetics at the CNTs surface. Conclusions: This study demonstrates the applicability of CNTs deposited on quartz filters for the removal or selective detection of volatile organic compounds (VOCs). The presence of aromatic rings in VOCs results in π-stacking interactions with a significant increase of their adsorption. On the other hand, it was found that CNTs surface interactions increase with water solubility and polarity of the VOC.

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Section: Adsorption/desorption Studiesmentioning

confidence: 99%

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Amade

Hussain²,

Romero‐Ocaña³

et al. 2014

J Environ Eng Ecol Sci

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show abstract

“…This view is also supported by ab initio calculations based on density functional theory showing that acetone attaches preferentially at defects, such as vacancies on nanotube sidewalls, via $0.90-3.3 eV interactions resulting from C(acetone)-O-C (nanotube) bonds, rather than C¼O bonds, on nanotube surfaces. [26] For graphene sheets, defects (i.e., dangling bonds) are ubiquitous along the sheet edges. Moreover the thermal shock that was employed to exfoliate graphite oxide to graphene leaves the structure littered with defects, such as five-and sevenmembered rings and carbon vacancies.…”

mentioning

confidence: 99%

Superhydrophobic to Superhydrophilic Wetting Control in Graphene Films

et al. 2010

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“…Some theoretical studies revealed higher chemical reactivity of SW defective sites than that of perfect sites in the zigzag SWCNTs and planar graphenes [24 -27]; however, Lu et al's investigation for the armchair SWCNTs with SW defects (SWCNTs with SW defects are abbreviated as SW-SWCNTs) obtained the opposite conclusion [19]. Aiming at understanding the different chemical reactivities of the different COC bonds in SWCNTs, various criterions, such as the tubular radius R [21], the atomic pyramidalization angle p [19], the direction of the COC bond relative to the tubular axis (defined as the oblique angle in this work), and the topological structure of the carbon rings that contain this COC bond [20] are proposed by many authors. Unfortunately, each of these criterions is only applicable to one or two cases and is not universal.…”

mentioning

confidence: 99%

“…So, we expect this uniform approach can also estimate the chemical reactivities of the SW-SWCNTs. Thermal desorption spectrum of acetone on all kinds of carbon nanotubes which contained defect-free and various defective SWCNTs showed that there were five peaks [21], indicating multiple possible adsorption models, but on the basis of the DCT, there are only two possible desorption peaks [29,30]. Therefore, to predict the chemical reactivities of the SWSWCNTs, this theoretical approach needs further extension.…”

mentioning

confidence: 99%

A reasonable criterion of reactivities at the defective region of single‐walled carbon nanotubes

Jia

Chen

et al. 2008

Int J of Quantum Chemistry

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ABSTRACT:Defect directional curvature K D-def was proposed as a reasonable criterion for the reactivities and adduct structures at the defective region of single-walled carbon nanotubes (SWCNTs). B3LYP/6-31G* calculations for the [2 ϩ 1] and [1 ϩ 1] additions of a series of 11-layer (n, n) (n ϭ 4 -8) and six-layer (10,0) SWCNTs with Stone-Wales defects showed that the K D-def or its mean K M-def was a good index to judge the adduct structures and the reactivities. Adducts of the [2 ϩ 1] additions were divided into two types: one was the adduct with the C-X-C configuration and corresponding to the large K D-def and the large binding energy, and another was the adduct with the closed Ϫ3MR structure and corresponding to the small K D-def and the small binding energy. It must be pointed out that, besides mainly relying on the K D-def , the adduct structures and the reactivities of the [2 ϩ 1] additions had been weakly affected by topologic structures. The calculated results for the [1 ϩ 1] additions of the 11-layer (5,5) SWCNT with defect A revealed that the binding energies monotonously increased with the K M-def .

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Chemisorption of Acetone on Carbon Nanotubes

Cited by 128 publications

References 31 publications

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Growth and functionalization of carbon nanotubes on quartz filter for environmental applications

Superhydrophobic to Superhydrophilic Wetting Control in Graphene Films

A reasonable criterion of reactivities at the defective region of single‐walled carbon nanotubes

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