Carbon Letters

Items from 1 to 20 out of 68 results

article

Effects of multi-walled carbon nanotube and flow types on the electrical conductivity of polycarbonate/carbon nanotube nanocomposites

Kwan Han Yoon, Young Sil Lee

Carbon Letters > 2019 > 29 > 1 > 57-63

Effects of multi-walled carbon nanotube (MWCNT) type and flow type (shear and elongational flow) on the electrical conductivity of polycarbonate (PC)/MWCNT nanocomposites were investigated. Two different MWCNTs produced a huge difference in electrical conductivity in an injection molded PC/MWCNT nanocomposite. It was observed that MWCNTs having a higher aspect ratio provide much lower electrical conductivity...

article

Facile synthesis and electrochemical investigations of Tin-doped MnO₂/carbon nanotube composites

Indu Kaushal, Ashok K. Sharma, Priya Saharan, Vinit Kumar, more

Carbon Letters > 2019 > 29 > 1 > 69-79

The composites of carbon nanotube (CNT) supported by Sn-doped MnO₂ with enhanced capacitance have been fabricated with varying dopant concentrations. The composites have been subjected to physiochemical, configurational, and morphological analyses by FTIR, UV–Vis spectroscopy, X-ray diffraction and field emission scanning electron microscopy, high resolution transmission electron microscopy and selected...

article

Exfoliated graphene nanosheets as high-power anodes for lithium-ion batteries

Duc-Luong Vu, Yeon Ju Kwon, Soon Chang Lee, Jea Uk Lee, more

Carbon Letters > 2019 > 29 > 1 > 81-87

High-quality and solution processable graphene sheets are produced by a simple electrochemical exfoliation method and employed as a high-power anode for lithium-ion batteries (LIBs). The electrochemically exfoliated graphene (EEG) composed of a few layers of graphene sheets, have low oxygen content and high C/O ratio (~ 14.9). The LIBs with EEG anode exhibit ultrafast lithium storage and excellent...

article

Preparation and characterization of functionalized MWCNTs-COOH with 3-amino-5-phenylpyrazole as an adsorbent and optimization study using central composite design

Mobina Alimohammady, Mansour Jahangiri, Farhoush Kiani, Hasan Tahermansouri

Carbon Letters > 2019 > 29 > 1 > 1-20

Carboxylated multi-wall carbon nanotubes (MWCNTs-COOH) was functionalized with 3-amino-5-phenylpyrazole (MWCNTs-f) and characterized by FTIR, EDX, SEM, XRD and TGA. The MWCNTs-COOH and MWCNTs-f were used for the adsorption of Cd(II), Hg(II), and As(III) ions from aqueous solutions. Additionally, to study the influence of pH, adsorbent dose, and initial ions concentration on the adsorption process,...

article

Feasibility analysis of China’s carbon taxation policy responding to the carbon tariff scheme of USA

Linrong Zhang, Dan Jiang, Muhammad Imran

Carbon Letters > 2019 > 29 > 1 > 99-107

Aimed at determining whether China’s active carbon emission reduction policy can respond to the threat of carbon tariff of the USA, this study proposed two kinds of carbon tax schemes for the USA and China, same carbon tax policy and a differential carbon tax policy. Four scenarios are set: the USA only charging carbon tax on domestic products; the USA charging carbon tax on domestic products and...

article

Effects of ultrasonic surface treatment on rice husk carbon

Kwang Ho Lee, Jeong Seok Oh

Carbon Letters > 2019 > 29 > 1 > 89-97

In this study, the different effects of ultrasonic surface treatment on rice husk carbon (RHC) were studied. The RHC was treated by ultrasound in water, silane, and polyphosphoric acid. Particle size, chemical changes of the surface, dispersion, and surface area were all investigated. The ultrasonic treatment in acid increased the hydrophilicity of RHC. The ultrasonic treatment in silane produced...

article

Splat-boundary reinforcement induced by graphene in plasma-sprayed hydroxyapatite composite coating

Jiaying Zhu, Jia Ren, Yao Chen

Carbon Letters > 2019 > 29 > 1 > 31-35

Plasma-sprayed HA coatings on metallic implants are widely used for clinical applications. However, typical lamellar structure along with plasma-sprayed coatings usually leads to weak inter-splat adhesion and impair their mechanical properties. In this research, graphene nanosheet (GNS) reinforced HA coatings were fabricated using plasma spray; these GNSs retained their original structure and distributed...

article

Preparation and characterization of RGO-incorporated hypercross-linked polymers for CO₂ capture

Rajangam Vinodh, Cadiam Mohan Babu, Aziz Abidov, Muthiahpillai Palanichamy, more

Carbon Letters > 2019 > 29 > 1 > 21-30

The growing demand for nano-structured composite materials and sustainable processes for next generation CO₂ capture technologies has necessitated the need to develop novel and cost-effective synthetic routes for solid CO₂ adsorbents based on hypercross-linked polymers (HCPs) and reduced graphene oxide (RGO) microporous sorbent materials with improved physico-chemical properties. The most important...

article

Effect of polydopamine-modified reduced graphene oxides on the catalytic activity of Pt nanoparticles catalysts for fuel cell electrodes

Joo-Hyoeng Woo, Soo-Jin Park, Sungwook Chung, Seok Kim

Carbon Letters > 2019 > 29 > 1 > 47-55

We have studied a method to prepare polydopamine-modified reduced graphene oxide-supported Pt nanoparticles (Pt–PDA–RGO). The Pt–PDA–RGO nanocomposites were synthesized by a wet-coating process, which was induced by self-polymerization of dopamine. As an eco-friendly and versatile adhesive source in nature, dopamine could be easily adhered to surfaces of organic material and inorganic material via...

article

Fluorinated TiO₂-doped, glycine-functionalized MWCNTs for high-performance antibacterial agents

Umadevi Mahalingam, Poornima P. Veerabaghu, Sangari Mayavan, Parimaladevi Ramasamy

Carbon Letters > 2019 > 29 > 1 > 65-68

Perennial need for bactericides requires cost-effective nanomaterials with strong antibacterial activities even in the absence of external irradiation. Hence, in this work, we have synthesized f-C_FT (fluorinated TiO₂-doped, glycine-functionalized MWCNTs) and have studied its antibacterial activities. Both gram-negative and gram-positive bacteria were analyzed in the absence of photo-activation. Zone...

article

Changes in structure of coal liquefied pitch during liquid-phase carbonization process

Yaming Zhu, Xuefei Zhao, Ji Yuan, Chunlei Zhao, more

Carbon Letters > 2019 > 29 > 1 > 37-45

Coal liquefied pitch (CLP) was prepared by the method of solvent extraction–hot filtration–distillation with the coal liquefied residue as the raw material. As one of the preconceived raw material to produce high-quality coal-based carbon material, the changes of structure of CLP during liquid-phase carbonization process have been detailed investigated in this study. Actually, FTIR and curve-fitted...

article

Processing and fundamental characterization of carbon fibers and cellulose nanocrystals derived from bagasse

Amina Abdel Meguid Attia, Maged Shafik Antonious, Mona Abdel Hamid Shouman, Ahmed Ali Ahmed Nada, more

Carbon Letters > 2019 > 29 > 2 > 145-154

Lignocellulosic materials such as agricultural residues have been identified as potential sustainable sources that can replace petroleum-based polymers. This study focused on the conversion of lignin extracted from bagasse to carbon fiber (CF) and cellulose nanocrystal (CNC). The highest extraction of lignin yield was achieved at 100 °C using 10% NaOH for 12 h. Carbon fibers were obtained by electro-spinning...

article

Effect of the pre-treated pyrolysis fuel oil: coal tar pitch ratio on the spinnability and oxidation properties of isotropic pitch precursors and the mechanical properties of derived carbon fibers

Jinchang Liu, Hiroki Shimanoe, Jong-Eun Choi, Seunghyun Ko, more

Carbon Letters > 2019 > 29 > 2 > 193-202

Pitch precursors affording excellent spinnability, high-level oxidation-resistance, and good carbonization yields were prepared by bromination–dehydrobromination of various ratios of pyrolyzed fuel oil and coal tar pitch. The pitches exhibited spinnabilities that were much better than those of pitches prepared via simple distillation. A pitch prepared using a 1:2 ratio of fuel oil and coal tar pitch...

article

Oral delivery of insulin via mesoporous carbon nanoparticles for colonic release allows glycemic control in diabetic rats

Haorong Lin, Jia Zhang, Chaochang Yu, Yan Lu, more

Carbon Letters > 2019 > 29 > 2 > 133-143

In this article, a new type of mesoporous carbon nanoparticles (MCN) was fabricated as a potential oral delivery system of insulin to reduce the adverse reactions by hypodermic injection. The mesoporous carbon nanoparticles-carried insulin (MCNI) was studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR) compared...

article

One- and two-dimensional carbon nanomaterials as adsorbents of cationic and anionic dyes from aqueous solutions

E. E. Pérez-Ramírez, M. de la Luz-Asunción, A. L. Martínez-Hernández, G. de la Rosa-Álvarez, more

Carbon Letters > 2019 > 29 > 2 > 155-166

One- and two-dimensional carbon nanomaterials were tested as adsorbents for the elimination of two anionic dyes, reactive red 2 and methyl orange, and the cationic dye methylene blue from aqueous solutions under the same conditions. Carbon nanomaterials performed well in the removal of dyes. Surface oxygenated groups in the nanomaterials improved the cationic dyes’ adsorption, but not the adsorption...

article

Effects of pressure-controlled reaction and blending of PFO and FCC-DO for mesophase pitch

Ji Hong Kim, Jong Gu Kim, Ki Bong Lee, Ji Sun Im

Carbon Letters > 2019 > 29 > 2 > 203-212

The mesophase pith was synthesized based on effects of a high-pressure thermal condensation and feed (PFO/FCC-DO) blending. The reaction conditions were designed by fluidity and reactivity of each feed during the thermal reaction. The high-pressure thermal condensation process disturbs distillation of the volatile compounds in pyrolysis fuel oil (PFO); the fluidity can be controlled. In the blending...

article

Fabrication of carbon nanofiber electrodes using poly(acrylonitrile-co-vinylimidazole) and their energy storage performance

Kyung-Hye Jung, So Jeong Kim, Ye Ji Son, John P. Ferraris

Carbon Letters > 2019 > 29 > 2 > 177-182

For electrodes in electrochemical double-layer capacitors, carbon nanofibers (CNFs) were prepared by thermal treatment of precursor polymer nanofibers, fabricated by electrospinning. Poly(acrylonitrile-co-vinylimidazole) (PAV) was employed as a precursor polymer of carbon nanofibers due to the effective cyclization of PAV polymer chains during thermal treatment compared to a typical precursor, polyacrylonitrile...

article

Fabrication and electrical properties of regenerated cellulose-loaded exfoliated graphene nanoplatelet composites

Joel Renaud Ngouanom Gnidakouong, Xiaoyuan Gao, Abdullahil Kafy, Jaehwan Kim, more

Carbon Letters > 2019 > 29 > 2 > 115-122

Low cost and scalable manufacturing of highly doped cellulose for enhanced multifunctional applications is still an issue. In this work, eco-friendly nanocomposites were fabricated by incorporating regenerated cellulose (RC) of 10, 30, and 50 wt% into an exfoliated graphene nanoplatelets (GNPs), resulting in the intercalation of GnPs. The thermal and electrical properties of hybrid nanocomposites...

article

Chlorella-derived activated carbon with hierarchical pore structure for energy storage materials and adsorbents

Joah Han, Kyubock Lee, Min Sung Choi, Ho Seok Park, more

Carbon Letters > 2019 > 29 > 2 > 167-175

Chlorella-derived activated carbon (CDAC) with a high specific surface area and hierarchical pore structure was prepared as a CO₂ adsorbent and as a supercapacitor electrode material. During KOH activation of Chlorella-derived carbon, metallic K gas penetrated from the outer walls to the inner cells, and pores formed on the outer frame and the inner surface. Micropores were dominant in CDAC, contributing...

article

Evaluation of edges for carbon materials via temperature-programmed desorption and temperature-programmed oxidation

Kazuki Matsumura, Taro Kinumoto, Tomoki Tsumura, Masahiro Toyoda

Carbon Letters > 2019 > 29 > 2 > 109-114

Herein, the edges in carbon materials were quantitatively evaluated by summing the amount of hydrogen and the amount of functional groups without hydrogen in the material. The amount of hydrogen in the carbon material was quantitated via temperature-programmed oxidation (TPO) under an oxygen atmosphere, whereas the amount of functional groups was determined via temperature-programmed desorption (TPD)...

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2019 (68)

Keywords

ADSORPTION (6)
CARBON NANOTUBES (5)
CARBONIZATION (4)
GRAPHENE (4)
MECHANICAL PROPERTIES (4)
ACTIVATED CARBON (3)
BIOMASS (3)
DOPING (3)
FUNCTIONALIZATION (3)
OXIDATION (3)
SUPERCAPACITORS (3)
BONDING (2)
CARBON BLACK (2)
CARBON COMPOSITES (2)
CARBON FIBER (2)
CARBON FIBERS (2)
CARBON NANOTUBES (CNT) (2)
CARBON PRECURSOR (2)
CHEMICAL ACTIVATION (2)
COMPOSITE (2)
ELECTRICAL CONDUCTIVITY (2)
ELECTROCATALYST (2)
EPOXY COMPOSITES (2)
FRACTURE TOUGHNESS (2)
GRAPHITIZATION (2)
ISOTROPIC PITCH-BASED CARBON FIBER (2)
LIGNIN (2)
MESOPHASE PITCH (2)
MESOPOROSITY (2)
MICROSTRUCTURE (2)
NANOCOMPOSITE (2)
NITROGEN DOPING (2)
PHYSICAL ACTIVATION (2)
POLYACRYLONITRILE (2)
POLYMER MATRIX COMPOSITES (2)
SPECIFIC SURFACE AREA (2)
SUPERCAPACITOR (2)
2-CEES (1)
3-AMINO-5-PHENYLPYRAZOLE (1)
ABSORPTION (1)
ACTIVATED CARBON FIBER (1)
ACTIVATED CARBON FIBER (ACF) (1)
ACTIVATION (1)
ACTIVE CARBON EMISSION REDUCTION (1)
ACTIVE SITE (1)
ALKALI ETCHING (1)
ALUMINUM ELECTROLYSIS (1)
AMORPHOUS CARBON FILM (1)
ANNEALING (1)
ANODE MATERIAL (1)
ANTIMICROBIAL ACTIVITY (1)
APPLICATIONS OF CNT (1)
AROMATIC (1)
ASPECT RATIO (1)
AVERAGE STRUCTURAL PARAMETER (1)
BAGASSE (1)
BET SURFACE AREA (1)
BI-METALLIC CATALYST (1)
BIOFILLER (1)
BIOMASS-DERIVED CARBON (1)
BLENDING PROCESS (1)
BROMINATION–DEHYDROBROMINATION (1)
BULK RIPPLOCATIONS (1)
CAMPHOR WOOD WASTE (1)
CARBON (1)
CARBON CATHODE (1)
CARBON GEL (1)
CARBON NANOFIBER (1)
CARBON NANOFIBERS (1)
CARBON NANOMATERIALS (1)
CARBON NANOPLATELETS (1)
CARBON TARIFF (1)
CATALYST (1)
CELLULOSE (1)
CELLULOSE NANOCRYSTAL (1)
CHAR YIELD (1)
CHARACTERIZATION (1)
CHEMICAL SURFACE HETEROGENEITY (1)
CHEMICAL VAPOUR DEPOSITION (1)
CHEMICAL WARFARE AGENT (1)
CHLORELLA VULGARIS (1)
CHOPPED CARBON FIBERS (1)
CLUSTER (1)
CO-CARBONIZATION (1)
CO-PRECIPITATION (1)
CO2 ACTIVATION (1)
CO2 ADSORBENT (1)
CO2 ADSORPTION (1)
CO2 CAPTURE (1)
COAL LIQUEFIED PITCH (1)
COAL TAR PITCH (1)
COAL TAR PITCH (CTP) (1)
COCONUT SHELL-BASED ACTIVATED CARBONS (1)
COMBUSTION (1)
COMPLEX VISCOSITY (1)
COULOMBIC EFFICIENCY (1)
CREEP BEHAVIOR (1)
CREEP DEFORMATION (1)
CVD DIAMOND (1)
DENSIFICATION (1)
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Carbon Letters

Effects of multi-walled carbon nanotube and flow types on the electrical conductivity of polycarbonate/carbon nanotube nanocomposites

Facile synthesis and electrochemical investigations of Tin-doped MnO₂/carbon nanotube composites

Exfoliated graphene nanosheets as high-power anodes for lithium-ion batteries

Preparation and characterization of functionalized MWCNTs-COOH with 3-amino-5-phenylpyrazole as an adsorbent and optimization study using central composite design

Feasibility analysis of China’s carbon taxation policy responding to the carbon tariff scheme of USA

Effects of ultrasonic surface treatment on rice husk carbon

Splat-boundary reinforcement induced by graphene in plasma-sprayed hydroxyapatite composite coating

Preparation and characterization of RGO-incorporated hypercross-linked polymers for CO₂ capture

Effect of polydopamine-modified reduced graphene oxides on the catalytic activity of Pt nanoparticles catalysts for fuel cell electrodes

Fluorinated TiO₂-doped, glycine-functionalized MWCNTs for high-performance antibacterial agents

Changes in structure of coal liquefied pitch during liquid-phase carbonization process

Processing and fundamental characterization of carbon fibers and cellulose nanocrystals derived from bagasse

Effect of the pre-treated pyrolysis fuel oil: coal tar pitch ratio on the spinnability and oxidation properties of isotropic pitch precursors and the mechanical properties of derived carbon fibers

Oral delivery of insulin via mesoporous carbon nanoparticles for colonic release allows glycemic control in diabetic rats

One- and two-dimensional carbon nanomaterials as adsorbents of cationic and anionic dyes from aqueous solutions

Effects of pressure-controlled reaction and blending of PFO and FCC-DO for mesophase pitch

Fabrication of carbon nanofiber electrodes using poly(acrylonitrile-co-vinylimidazole) and their energy storage performance

Fabrication and electrical properties of regenerated cellulose-loaded exfoliated graphene nanoplatelet composites

Chlorella-derived activated carbon with hierarchical pore structure for energy storage materials and adsorbents

Evaluation of edges for carbon materials via temperature-programmed desorption and temperature-programmed oxidation

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