UV-ozone treatment of multi-walled carbon nanotubes for enhanced organic solvent dispersion

Najafi, Ebrahim; Kim, Jae-Yong; Han, Su Ha; Shin, Kwanwoo

doi:10.1016/j.colsurfa.2005.11.074

Cited by 97 publications

(66 citation statements)

References 23 publications

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“…The introduction of such functional groups allowed for the increase in the surface wettability of the material. [23][24][25] The procedure provides a type of surface treatment that can be carried out at atmospheric pressures thus, lowering treatment cost, and minimizes damaging effects inherent in other treatment techniques such as strong acid oxidation. 21 The influence of the UV/O 3 time of exposure to the material surface chemistry and morphology was examined and correlated with the electrochemical performance of these electrodes when explored in Shewanella oneidensis MFC.…”

mentioning

confidence: 99%

Surface Modification for Enhanced Biofilm Formation and Electron Transport in Shewanella Anodes

Cornejo

Lopez

Babanova

et al. 2015

J. Electrochem. Soc.

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In this study a simple, fast and effective surface modification method for enhanced biofilm formation, increased electron transfer rate and higher current density generation from microbial fuel cell (MFC) has been demonstrated. This method consists of partial oxidation of carbon felt material by UV/O 3 treatment. Results from the electrochemical studies performed suggest that Shewanella oneidensis MR-1 biofilm formation is favored on UV/O 3 treated carbon felt electrodes when subjected to an applied potential of The possibility to directly convert the energy of chemical bonds into electricity has been recognized as an alternative and effective approach for energy transformation. This quest has been embodied in electrochemical devices including batteries and fuel cells. Commonly used batteries and fuel cells employ inorganic catalysts and harmful, costly electrolytes. In order to overcome the limited reserve of noble metals usually used and avoid the use of harmful compounds, a new avenue of electrochemical systems has been developed. These new systems rely on bio-catalytic ability of enzymes and microorganisms in fuel cells.1 The latter has gained attention of researchers, government agencies and industry driven by, among other things, the potential for combining efficient wastewater purification with concomitant electricity production. This achievement will provide an opportunity for the development of portable, self-sustaining wastewater treatment units.The electrode material and its properties are a key component, determining the performance and cost of Microbial Fuel Cells (MFCs).2 Therefore, electrode design is one of the greatest challenges in making MFCs a cost-effective and scalable technology.3-8 Among the general requirements, such as good conductivity, chemical stability, mechanical strength, high surface area and low cost, anode materials should posses several key characteristics that will determine the rate of bacteria-electrode interactions. These are, but not limited to: i) high surface roughness; ii) biocompatibility; and iii) surface chemistry that enhances bacterial attachment and electron transfer. [9][10]

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mentioning

confidence: 99%

Surface Modification for Enhanced Biofilm Formation and Electron Transport in Shewanella Anodes

Cornejo

Lopez

Babanova

et al. 2015

J. Electrochem. Soc.

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“…However, there is an intrinsic problem of insolubility in most solvents and many groups have tried to solve it in decades [19,20]. And there are few reports about using conducting polymers and carbon materials hybrid as counter electrode materials in DSSCs.…”

Section: Introductionmentioning

confidence: 99%

Application of Poly (3, 4-ethylenedioxythiophene): polystyrenesulfonate counter electrode in polymer heterojunction dye-sensitized solar cells

Yue

Lin

et al. 2011

Front. Optoelectron. China

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A Poly (3, 4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS)/carbon conductive paste was prepared and coated on a conducting FTO glass to construct counter electrode for polymer heterojunction dye-sensitized solar cells (DSSCs). The surface morphology, conductivity, sheet resistance, redox properties and photoelectric properties of carbon electrode were observed respectively by scanning electron microscopy, four-probe tester and CHI660D electrochemical measurement system. The experimental results showed that DSSCs had the best photoelectric properties for PEDOT:PSS/carbon counter electrode annealing at 80°C in vacuum conditions. Using [6, 6]-phenyl-C 61 -butyric acid methyl ester (PCBM)/poly (3-hexylthiophene) (P3HT) heterojunction to replace I -3 =I -redox electrolyte, the overall energy conversion efficiency of the DSSCs with barrier layer reached 4.11% under irradiation of a simulated solar light with a intensity of 100 mW$cm -1 (AM 1.5), which is higher 20% than that of the DSSCs with Pt counter electrode (3.42%). The excellent photoelectric properties, simple preparation procedure and low cost allow the PEDOT:PSS/carbon electrode to be a credible alternative used in DSSCs.

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“…Nano-sized graphite Recently, a large number of papers have reported studies to modify carbon nanoparticles in efforts to improve their dispersibilty in polymer, as well as in solutions, and ultimately to increase targeted properties of polymers [91,92]. The modification of carbon nanoparticles has often focused on chemical modification or functionalization, to covalently attach specific functional groups to their surfaces and edges [93][94][95][96].…”

Section: Dynamic Mechanical and Thermal Properties Of Peti-5/xgnp Commentioning

confidence: 99%

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Cho

Drzal²

2016

Carbon letters

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In efforts to characterize and understand the properties and processing of phenylethynylterminated imide (LaRC PETI-5, simply referred to as PETI-5) oligomers and polymers as a high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between carbon fibers and a bismaleimide (BMI) matrix, as well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP particles incorporated into epoxy resin on the toughness of xGnP/epoxy composites is examined in terms of its impact on Izod strength. This paper provides an extensive overview from fundamental studies on PETI-5 and xGnP, as well as applied studies on relevant composite materials.Key words: polyimide, exfoliated graphite nanoplatelets, carbon fiber, composite, properties Phenylethynyl-Terminated Imide PolymerPolyimides have been extensively used in the electronics industry [1] as coatings, films, or adhesives and also in composite applications [2] as a primary or secondary structural material. When incorporated with organic or inorganic fibers, including carbon fibers and glass fibers, they can potentially be applied as a sizing material for high-temperature uses. In advanced applications, one of the most desirable advantages of polyimides, especially the aromatic polyimides, is their excellent high-temperature performance. Their thermal characteristics, including high temperature stability and cure behavior, are critical to successful processing and to the final properties of the resulting polyimide. For aerospace and aircraft applications, advanced polymer materials must successfully maintain their properties at high service temperatures over a long exposure time [3][4][5].The important parameters influencing the heat resistance of a polymeric material are its glass transition temperature (T g ), melting point (T m ), thermal stability, and etc., which may depend on its thermal history. Accordingly, polymers that are used to fulfill such high temperature performance should exhibit a high T g or T m and have excellent thermal stability. Even though some polyimides meet the high temperature requirement, their uses have been limited due to processing difficulties, such as poor solubility in common solvents, the release of volatiles, brittleness, and high processing temperature [6,7].Aromatic polyimides, especially acetylene or ethynyl-terminated polyimides, have been extensiv...

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UV-ozone treatment of multi-walled carbon nanotubes for enhanced organic solvent dispersion

Cited by 97 publications

References 23 publications

Surface Modification for Enhanced Biofilm Formation and Electron Transport in Shewanella Anodes

Surface Modification for Enhanced Biofilm Formation and Electron Transport in Shewanella Anodes

Application of Poly (3, 4-ethylenedioxythiophene): polystyrenesulfonate counter electrode in polymer heterojunction dye-sensitized solar cells

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

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