Long-term stability of superhydrophilic oxygen plasma-modified single-walled carbon nanotube network surfaces and the influence on ammonia gas detection

Min, Sungjoon; Kim, Joonhyub; Park, Chanwon; Jin, Joon-Hyung; Min, Nam Ki

doi:10.1016/j.apsusc.2017.03.080

Cited by 21 publications

(4 citation statements)

References 14 publications

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“…The results are in agreement with the work of Janas and Stando who managed to prepare a super-hydrophilic CNTs with a contact angle of 7° 31 . Min et al 32 also prepared SWCNTs with a water contact angle of nearly 0°. The FT-IR of the CNTs in the wavenumber of 400-4000 cm −1 is shown in Fig.…”

Section: Results and Discussion Of Lignocellulosic Biomass Characterimentioning

confidence: 99%

The production and application of carbon nanomaterials from high alkali silicate herbaceous biomass

Osman

Farrell

Al-Muhtaseb

et al. 2020

Sci Rep

110

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Herein, value-added materials such as activated carbon and carbon nanotubes were synthesized from low-value Miscanthus × giganteus lignocellulosic biomass. A significant drawback of using Miscanthus in an energy application is the melting during the combustion due to its high alkali silicate content. An application of an alternative approach was proposed herein for synthesis of activated carbon from Miscanthus × giganteus, where the produced activated carbon possessed a high surface area and pore volume of 0.92 cm 3 .g −1 after two activation steps using phosphoric acid and potassium hydroxide. The S Bet of the raw biomass, after first activation and second activation methods showed 17, 1142 and 1368 m 2 .g −1 , respectively. Transforming this otherwise waste material into a useful product where its material properties can be utilized is an example of promoting the circular economy by valorising waste lignocellulosic biomass to widely sought-after high surface area activated carbon and subsequently, unconventional multi-walled carbon nanotubes. This was achieved when the activated carbon produced was mixed with nitrogen-based material and iron precursor, where it produced hydrophilic multiwall carbon nanotubes with a contact angle of θ = 9.88°, compared to the raw biomass. synthesised materials were tested in heavy metal removal tests using a lead solution, where the maximum lead absorption was observed for sample AC-K, with a 90% removal capacity after the first hour of testing. The synthesis of these up-cycled materials can have potential opportunities in the areas of wastewater treatment or other activated carbon/carbon nanotube end uses with a rapid cycle time.

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Section: Results and Discussion Of Lignocellulosic Biomass Characterimentioning

confidence: 99%

The production and application of carbon nanomaterials from high alkali silicate herbaceous biomass

Osman

Farrell

Al-Muhtaseb

et al. 2020

Sci Rep

110

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“…(2017) surface treated CNT films by atmospheric pressure plasma using a mixture of helium and oxygen, leading to a static contact angle decrease from 105° to 80°, 64°, and 47° only after 0.1, 0.2, and 0.3 s treatments, respectively [37]. Indeed, oxygen plasma functionalization is a common method to make CNTs hydrophilic [38,39] Similiarly, Wang et al (2009) measured the wettability of graphene and graphene oxide thin films, reporting surface energies of 46.7 and 62.1 mJ/m 2 , respectively [40]. Alternatively, the dynamic CA assesses the angle between the liquid and the surface under moving boundaries (three phases: air, liquid and solid film).…”

Section: Introductionmentioning

confidence: 99%

Full range of wettability through surface modification of single-wall carbon nanotubes by photo-initiated chemical vapour deposition

Hosseininasab

Faucheux

Soucy

et al. 2017

Chemical Engineering Journal

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Single-wall carbon nanotubes (SWCNTs) have various remarkable properties, which make them a promising candidate for many applications. However, their inherent hydrophobicity have limited their commercial use in optical, biological, and electrical applications. Photo-initiated chemical vapor deposition (PICVD) using syngas is proposed as a novel, affordable, and versatile method to tailor SWCNT wettability through the addition of oxygen-containing functional groups.Following PICVD surface treatment, X-ray photoelectron spectroscopy, water contact angle measurements (CA), thermogravimetric analysis, Raman spectroscopy and transmission electron microscopy confirm controlled oxygenation of the SWCNT surface. Indeed, this novel approach allows to reproducibly make SWCNT having surfaces properties ranging from superhydrophilic (CA<5°) to superhydrophobic (CA>150°), including any intermediate values, by simply varying operational parameters such as molar ratio of the syngas precursor, photo-polymerization time and reactor pressure (about normal conditions).

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“…It has advantages, such as excellent treatment effect, no need for expensive vacuum equipment [11], low energy consumption [12] and low environmental pollution (no solvent). There are many studies on the surface modification of plasma, but there are few reports on its timeliness (aging effect) [13][14][15][16]. This research focuses on the modification of commercial carbon cloth surfaces using a dielectric barrier discharge (DBD [17]) device at room temperature and atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Aging Effect of Plasma-Treated Carbon Fiber Surface: From an Engineering Point

Wang,

Gao

et al. 2024

Coatings

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Dielectric barrier discharge (DBD) plasma surface modification has certain aging effect. This article studies the aging effect of plasma (DBD) on the surface modification of carbon fibers. The test results show that plasma (DBD) treatment reduces the impurity particles on the surface of carbon fibers and makes the surface texture coarser. In addition, there is no significant change. After plasma (DBD) treatment, the content of C–O–C, C–O and C=O on the surface of carbon fibers increased from 3.20%, 7.76% and 1.64% to 7.06%, 21.50 and 6.08%, respectively. This is due to the high-energy particle bombardment of the fiber surface, which forms activated carbon atoms on the surface. The free electrons of these activated carbon atoms combine with ionized oxygen in the air. However, with the passage of time, the content of C–O–C, C–O and C=O gradually decreases to 3.31%, 8.57% and 1.77%, respectively. This is because some functional groups formed on the treated carbon fiber surface are not firmly bound, and some of these functional groups containing O2 groups will combine with surrounding substances through irreversible chemical oxidation reactions to produce CO2, which leaves the carbon fiber surface as a gas. The treated carbon fibers will immediately become hydrophilic, and the water contact angle decreases from 148.71° to 0°. With the passage of time, the water contact angle gradually increases to 118.16°, and the hydrophobicity recovers.

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Long-term stability of superhydrophilic oxygen plasma-modified single-walled carbon nanotube network surfaces and the influence on ammonia gas detection

Cited by 21 publications

References 14 publications

The production and application of carbon nanomaterials from high alkali silicate herbaceous biomass

The production and application of carbon nanomaterials from high alkali silicate herbaceous biomass

Full range of wettability through surface modification of single-wall carbon nanotubes by photo-initiated chemical vapour deposition

Aging Effect of Plasma-Treated Carbon Fiber Surface: From an Engineering Point

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