Nd-doped TiO2-C hybrid aerogels and their photocatalytic properties
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Xia Shao, Feng Pan, Li Zheng, Rui Zhang, Wen-ya ZhangAbstractNd-doped TiO2-C hybrid aerogels with different Nd doping levels were prepared by a combined sol-gel and impregnation method. The microstructure, morphology and photocatalytic activities of the samples were investigated by XRD, SEM, FTIR, XPS, nitrogen adsorption and the photocatalytic degradation of methylene blue (MB) under UV irradiation. Results showed that the samples are composed of irregular-shaped nanoparticles and the Nd dopant inhibits their growth. The TiO2 in the sam...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Synthesis and properties of a silane and copolymer-modified graphene oxide for use as a water-reducing agent in cement pastes
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Qin Wang, Shi-yu Li, Shuo Pan, Zi-wei GuoAbstractThe addition of graphene oxide (GO) to cement paste significantly increases its toughness, however its fluidity is adversely affected. GO was first reacted with vinyltrimethoxysilane to produce a silane-modified graphene oxide (S-GO), which was then copolymerized with acrylic acid and a water reducing agent, isobutaenol polyoxyethylene ether (molecular mass 2400), to obtain a silane and copolymer-modified GO (P-S-GO) which acted as a water-reducing agent of the cement paste. A copolymer wi...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Piezoresistive response of carbon nanotube yarns under tension: Parametric effects and phenomenology
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Jude C. Anike, Kalayu Belay, Jandro L. AbotAbstractCopper Carbon nanotubes (CNTs) are inherently sensitive to mechanical strain, making them ideal for sensing in composites. Because of this they were purposefully spun into macroscopic yarns to permit their utilization in structural components. This experimental study aims to determine the effect of quasi-static strain rate, mechanical properties and geometry of the CNT yarns on their piezoresistivity. Strain rates affect the failure mechanisms and electromechanical properties of CNT yarn...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Synthesis of a biocompatible nanoporous carbon and its conjugation with florescent dye for cellular imaging and targeted drug delivery to cancer cells
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): S. Yallappa, Shoriya Aruni Abdul Manaf, Gurumurthy HegdeAbstractA nanoporous carbon (NPC) was synthesized from Oil palm leaves (OPL) by pyrolysis at 600 °C in a N2 atmosphere, oxidized by a mixture of sulfuric and nitric acids (3:1 vol/vol) and conjugated with coumarin-6 as a fluorescence dye for cellular imaging and drug delivery to cancer cells. The structure, morphology and dispersion stability of NPC in aqueous media before and after the conjugation were investigated by XRD, FT-IR, Raman spectroscopy, SEM, TEM and zeta potential mea...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Preparation of a biochar with a high calorific value from chestnut shells
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Ke-mao Jiang, Chao-ge Cheng, Min Ran, Yong-gen Lu, Qi-lin WuAbstractThe recovery of biomass provides a solution for solving the energy shortage problem. Chestnut shells consist of cellulose, hemicellulose and lignin, and have a low calorific value. We propose a method to produce a biochar with a high calorific value from chestnut shells by catalytic pre-oxidation and pyrolysis with sulfuric acid and urea. The pyrolysis behavior and the changes in structure and properties were investigated. Results indicate that the catalysts slow the pyr...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Improved decontamination performance of biofilm systems using carbon fibers as carriers for microorganisms
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Yong-zhen An, Chun-hua Wang, Peng Miao, Xiao-xu Wang, Jie-ying Liang, Jie LiuAbstractBiofilm carriers and effective microorganisms (EMs) are both important to improve the decontamination performance of biofilms for wastewater. The decontamination performance of biofilms using polyester (PET), polyvinyl alcohol (PVA), carbon fibers (CFs) and electrochemically-treated CFs as biofilm carriers for EMs were investigated by comparing the concentrations of the chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) of wastew...
Source: New Carbon Materials - July 11, 2018 Category: Chemistry Source Type: research
Carbon-supported metal single atom catalysts
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Hai Li, Hai-xia Zhang, Xiao-li Yan, Bing-she Xu, Jun-jie GuoAbstractMetal single atom catalysts (SACs) have been attracting increasing attention in recent years owing to their incredible performance in several key catalytic reactions such as the oxygen reduction reaction and CO oxidation. The construction of well dispersed stable SACs can not only make it possible to understand the catalytic reactions on the atomic scale, but is also important for developing novel industrial catalysts. Recent efforts have been focused on dispersing me...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Stabilizing graphene layers by intercalating laponite between them
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Jing Li, Jin-can Cui, Zhen-zhen Yang, Han-xun Qiu, Zhi-hong Tang, Jun-he YangAbstractThe reduction of graphene oxide (GO) leads to the re-stacking/agglomeration of graphene layers, which results in their precipitation from an aqueous dispersion. A laponite colloid was used to prevent re-stacking and stabilize an aqueous dispersion of reduced graphene oxide (RGO) by dispersing GO in the colloid, followed by reduction with hydrazine hydrate under microwave radiation. Results indicate that re-stacking is prevented as proven by the disapp...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Synthesis of copper sulfide/reduced graphene oxide nanocomposites for use as the counter electrodes of high-performance CdS-sensitized solar cells
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Amr Hessein, Ahmed Abd El-MoneimAbstractCopper sulfide (CuxS)/reduced graphene oxide (RGO) nanocomposites were prepared by a one-pot hydrothermal method with various contents of GO in the initial precursor. The nanocomposites were first blended with a polyvinylidene fluoride binder, then coated onto SnO2−xFx substrates, which were used as the counter electrodes (CEs) of quantum dot solar cells (QDSCs) using a CdS-sensitized TiO2 as a photoanode. The microstructure and performance of the CEs were characterized by FE-SEM, XRD, Raman s...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
The cytotoxicity of water-soluble carbon nanotubes on human embryonic kidney and liver cancer cells
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Shi-ping Yu, Xu-dong Su, Jing-lei Du, Jun-li Wang, Yu-duan Gao, Li Zhang, Lin Chen, Yong-zhen Yang, Xu-guang LiuAbstractThe cytotoxicity of polyethylene glycol-modified carbon nanotubes (PEG-CNTs) on human embryonic kidney cells (293T) and hepatoma cells (HepG2) was studied in vitro. The effect of the concentration of PEG-CNTs on the cell activity and survival rate was detected by a colorimetric assay method after exposure for 24, 48 and 72 h. The dead HepG2 cells obtained by incubation in solutions with different concentrations of PE...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Specific heat capacities and flow resistance of an activated carbon with adsorbed helium as a regenerator material in refrigerators
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Liu-biao Chen, Chun-hui Kong, Xian-lin Wu, Yuan Zhou, Jun-jie WangAbstractAn ideal regenerator material is characterized by a high specific heat capacity and a low flow resistance, and the specific heat capacity of the working gas must be low. However, the specific heat capacity of a helium working gas is much higher than that of the general regenerator materials in the temperature range 4-30 K, which severely limits the improvement of the refrigerator performance. The helium adsorption capacity of the activated carbon was first evalu...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Preparation and characterization of high softening point and homogeneous isotropic pitches produced from distilled ethylene tar by a novel bromination method
Publication date: February 2018Source: New Carbon Materials, Volume 33, Issue 1Author(s): Chuan-zhang Ge, Zhen-long Sun, Hai-xiao Yang, Dong-hui Long, Wen-ming Qiao, Li-cheng LingAbstractHomogeneous isotropic pitches with high softening points were prepared from vacuum-distilled heavy residue ethylene tar (ET-HR) by a two-step method of bromination and subsequent dehydrobromination/polycondensation. The ET-HR was first brominated at 30 or 200 oC, and then heat-treated at 350 oC to enable the dehydrobromination/polycondensation reactions. GC/MS and LDI TOF/MS spectra indicated that the ET-HR was mainly composed of compounds...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Carbon materials in a high temperature gas-cooled reactor pebble-bed module
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Xiang-wen Zhou, Yang Yang, Jing Song, Zhen-ming Lu, Jie Zhang, Bing Liu, Ya-ping TangAbstractCompared with the long use of carbon materials in human history, the debut of carbon materials in the Chicago Pile-1 nuclear reactor took place only 70 years ago. Since then, carbon materials have played important roles in nuclear reactors, especially in high temperature gas-cooled reactors (HTRs) because of their many excellent properties. As the most promising candidate for Generation IV reactors, a demonstration plant for HTRs, an HTR pebble-b...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Nd-doped TiO2-C hybrid aerogels and their photocatalytic properties
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Xia Shao, Feng Pan, Li Zheng, Rui Zhang, Wen-ya ZhangAbstractNd-doped TiO2-C hybrid aerogels with different Nd doping levels were prepared by a combined sol-gel and impregnation method. The microstructure, morphology and photocatalytic activities of the samples were investigated by XRD, SEM, FTIR, XPS, nitrogen adsorption and the photocatalytic degradation of methylene blue (MB) under UV irradiation. Results showed that the samples are composed of irregular-shaped nanoparticles and the Nd dopant inhibits their growth. The TiO2 in the sam...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
Synthesis and properties of a silane and copolymer-modified graphene oxide for use as a water-reducing agent in cement pastes
Publication date: April 2018Source: New Carbon Materials, Volume 33, Issue 2Author(s): Qin Wang, Shi-yu Li, Shuo Pan, Zi-wei GuoAbstractThe addition of graphene oxide (GO) to cement paste significantly increases its toughness, however its fluidity is adversely affected. GO was first reacted with vinyltrimethoxysilane to produce a silane-modified graphene oxide (S-GO), which was then copolymerized with acrylic acid and a water reducing agent, isobutaenol polyoxyethylene ether (molecular mass 2400), to obtain a silane and copolymer-modified GO (P-S-GO) which acted as a water-reducing agent of the cement paste. A copolymer wi...
Source: New Carbon Materials - July 5, 2018 Category: Chemistry Source Type: research
