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Polyaniline and multi-walled carbon nanotube composite electrode for rechargeable battery

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中国有色金属学会会刊：英文版 2012年第S3期22卷 717-721页

作者： Yu-Jeong LIM Min-Young PARK Sang-Keol LEE Won-Ki LEE Nam-Ju JO Department of Polymer Science & Engineering Pusan National University Hankook Tire Co.Ltd. Department of Polymer Engineering Pukyong National University

The multi-walled carbon nanotube was introduced into the polymer matrix (PANI) to improve the electric conductivity as well as mechanical properties of the original polymer ***/multi-walled carbon nanotube (MWCNT) composites were synthesized via ex-situ and in-situ polymerization to improve their electrical *** the DC conductivities of PANI/MWCNT according to content and diameter of MWCNT were measured by four-point *** highest electric conductivity of PANI/MWCNT composite is 20 S/cm when 0.3% (mass fraction) MWCNTs with 10 nm in diameter and 15 μm in length are added in composite.

关键词： polymer electrode electric conductivity multi-walled carbon nanotube conducting polymer

Adsorption of Dyes Using multi-walled Carbon Nanotube Hydrogel

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Chemical Research in Chinese Universities 2019年第2期35卷 311-318页

作者： YU Meng LIU Miao College of New Energy and Environment Jilin UniversityChangchun 130012P.R.China

The hydrophilic multi-walled carbon nanotube(MWCNT)hydrogel was prepared using acrylic acid,acrylamide and hydrophilic *** orthogonal experiment was applied to optimize the synthetic *** MWCNT hydrogel was characterized by Fourier transform infrared spectrophotometer(FTIR)and scanning electron microscopy(SEM)*** MWCNT hydrogel was used as the adsorbent to adsorb water-soluble cationic *** study evaluated the adsorption performance of hydrogels on four dyes of safranine Ts crystal violet,malachite green and methylene blue in *** effects of the amount of hydrogel,the size of hydrogel,pH;and the temperature on the adsorption performance were *** adsorption kinetic and adsorption isotherm curves were *** experimental results show that the MWCNT hydrogel can be easily separated from water and the adsorption capacity is much greater compared to the hydrogel without *** MWCNT hydrogels can be used in wastewater treatment with a great potential.

关键词： multi-walled carbon nanotube Poly(acrylamide/acrylic acid) Hydrogel Dye Adsorption

Influence of Zn ion implantation on structures and field emission properties of multi-walled carbon nanotube arrays

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Science China(Technological Sciences) 2010年第3期53卷 776-781页

作者： CHEN KeFan,DENG JianHua,ZHAO Fei,CHENG GuoAn &ZHENG RuiTing Key Laboratory of Beam Technology and Material Modification of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing100875,China Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and Technology Beijing Normal University Beijing China

The structures and field emission properties of multi-walled carbon nanotube arrays implanted with Zn+ by MEVVA ion implanter have been *** results revealed that Zn+implantation induced structural damage and that the top of carbon nanotubes with multi-layered graphite structure were transformed into carbon nanowires with amorphous ***,C:Zn solid solution was synthesized after Zn+ *** turn-on field and threshold field were 0.80 and 1.31 V/μm,respectively for original multi-walled carbon nanotube arrays and were reduced to 0.66 and 1.04 V/μm due to the synthesis of C and Zn composite,in which the work function was reduced after low doses of Zn+*** is indicated that low doses of Zn+implantation can improve field emission performance of multi-walled carbon nanotube ***,high doses of Zn+implantation can reduce field emission properties of multi-walled carbon nanotube arrays,because radiation damage reduces the electric field enhancement factor.

关键词： multi-walled carbon nanotubes ion implantation field electron emission

Ultrasensitive electrochemical determination of metronidazole based on polydopamine/carboxylic multi-walled carbon nanotubes nanocomposites modified GCE

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Journal of Pharmaceutical Analysis 2018年第2期8卷 124-130页

作者： Satar Tursynbolat Yrysgul Bakytkarim Jianzhi Huang Lishi Wang School of Chemistry and Chemical Engineering South China University of Technology

An ultrasensitive electrochemical sensor based on polydopamine/carboxylic multi-walled carbon nanotubes(MWCNTs à COOH) nanocomposites modified glassy carbon electrode(GCE) was presented in this work, which has been developed for highly selective and highly sensitive determination of an antimicrobial drug, metronidazole. The preparation of polydopamine/MWCNTs–COOH nanocomposites/GCE sensor is simple and possesses high reproducible, where polydopamine can be coated on the surface of MWCNTs–COOH via a simple electropolymerization process. Under optimized conditions, the proposed sensor showed ultrasensitive determination for metronidazole with a wide linear detection range from5 to 5000 mmol/dm^3 and a low detection limit of 0.25 mmol/dm^3(S/N=3). Moreover, the proposed sensor has been successfully applied for the quantitative determination of metronidazole in real drug samples. This work may provide a novel and effective analytical platform for determination of metronidazole in application of real pharmaceutical and biological samples analysis.

关键词： Metronidazole Polydopamine Carboxylic multi-walled carbon nanotubes Nanocomposites Electrochemical determination Electrochemical sensor

Pre-incubated with BSA-complexed free fatty acids alters ER stress/autophagic gene expression by carboxylated multi-walled carbon nanotube exposure in THP-1 macrophages

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Chinese Chemical Letters 2019年第6期30卷 1224-1228页

作者： Qianyu Yang Maolin Wang Yongbing Sun Shengming Peng Yanhuai Ding Yi Cao Key Laboratory of Environment-Friendly Chemistry and Application of Ministry of Education Lab of Biochemistry College of Chemistry Xiangtan University Xiangtan 411105 China National Engineering Research Center for Solid Preparation Technology of Chinese Medicines Jiangxi University of Traditional Chinese Medicines Nanchang 330006 China

Recently we found that multi-walled carbon nanotube (MWCNT) exposure alters the mRNA levels of endoplasmic reticulum (ER) stress/autophagic genes, but the impact of biological molecules on this response is unclear. Herein, we compared the different actions of carboxylated MWCNTs (c-MWCNTs) pre-incubated with bovine serum albumin (BSA) or BSA-complexed free fatty acid (denoted as FFA) on macrophages derived from THP-1 monocytes (denoted as THP-1 macrophages). C-MWCNTs exhibited increased diameter and hydrodynamic size as well as decreased absolute zeta potential value after pre-incubation with BSA or FFA, which suggested a coating effect. Cytotoxicity or oxidative stress were not significantly induced after exposure to BSA-or FFA-coated c-MWCNTs. BSA-pre-incubated c-MWCNTs significantly enhanced the expression of the ER stress gene, DDIT3 and the autophagic genes, ATG5, BECN1, and PLIN2, but the mRNA levels of these genes was significantly decreased by FFA-pre-incubated c-MWCNTs. FFA-pre-incubated c-MWCNTs induced significantly higher lipid accumulation and interleukin-6 (IL-6) protein level compared with BSA-pre-incubated c-MWCNTs, which suggested that FFA-pre-incubated c-MWCNTs may more effectively induce the formation of macrophage foam cells. Collectively, our data indicated that pre-incubation with FFA may influence c-MWCNT-induced ER stress/autophagic gene expression and foam cell formation in THP-1 macrophages.

关键词： multi-walled carbon nanotubes (MWCNTs) THP-1 macrophages Endoplasmic reticulum (ER) stress Autophagy Foam cells

The toxicity of hydroxylated and carboxylated multi-walled carbon nanotubes to human endothelial cells was not exacerbated by ER stress inducer

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Chinese Chemical Letters 2019年第3期30卷 582-586页

作者： Zhen Li Ting Liu Jimin Long Yang Wu Biao Yan Ping Ma Yi Cao Laboratory of Environment-immunological and Neurological Diseases School of Basic Medical Sciences Hubei University of Science and Technology Key Laboratory of Environment-Friendly Chemistry and Application of Ministry of Education Laboratory of Biochemistry College of Chemistry Xiangtan University

Hydroxylated multi-walled carbon nanotubes(h-MWCNTs) and carboxylated MWCNTs(c-MWCNTs)have potential applications in biomedicine, but their toxicity to human endothelial cells under stressed conditions associated with chronic diseases was less studied in vitro. This study stressed human umbilical vein endothelial cells(HUVECs) with ER stress inducer thapsigargin(TG), and investigated the toxicity of h-MWCNTs and c-MWCNTs to normal and stressed HUVECs. h-MWCNTs and c-MWCNTs modestly reduced cellular viability, significantly promoted soluble ICAM-1(sICAM-1),soluble VCAM-1(sVCAM-1) as well as intracellular ROS, and decreased the expression of transcription factor KLF2 and KLF4. Pre-treatment with TG significantly reduced cellular viability, promoted IL-6 and THP-1 monocyte adhesion, and increased the expression of a panel of ER stress genes. ANOVA indicated no interaction between MWCNTs and TG pre-treatment on most of the endpoints. It was concluded that the toxicity of h-MWCNTs and c-MWCNTs to HUVECs might not be exacerbated by ER stress

关键词： multi-walled carbon nanotubes (MWCNTs) Human umbilical vein endothelial cells (HUVECs) ER stress Kruppel-like factor (KLF) Toxicity

Adsorption and desorption phenomena on thermally annealed multi-walled carbon nanotubes by XANES study

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Chinese Physics B 2019年第9期28卷 145-149页

作者： Camile Rodolphe Tchenguem Kamto Bridinette Thiodjio Sendja Jeannot Mane Mane University of Yaounde Ⅰ Faculty of ScienceDepartment of PhysicsYaoundeCameroon University of Yaounde Ⅰ National Advanced School of EngineeringDepartment of Mathematic and Physical ScienceYaoundeCameroon University of Dschang DschangCameroon

The multi-walled carbon nanotubes(MWCNTs) studied in this work were synthesized by the catalytic chemical vapor deposition(CCVD) process, and were thermally annealed by the hot filament plasma enhanced(HF PE) method at 550℃ for two *** x-ray absorption near edge structure(XANES) technique was used to investigate the adsorption and desorption phenomena of the MWCNTs at normal and grazing incidence *** adsorbates were found to have different sensitivities to the thermal *** geometry of the incident beam consistently gave information about the adsorption and desorption *** addition, the adsorption of non-intrinsic potassium quantitatively affected the intrinsic adsorbates and contributed to increase the conductivity of the *** desorption of potassium was almost 70% greater after the thermal *** potassium non-intrinsic adsorbates are from a physisorption mechanism whereas the intrinsic adsorbates result from chemisorption.

关键词： multi-walled carbon nanotubes thermal annealing adsorption desorption

In situ chemical fabrication of polyaniline/multi-walled carbon nanotubes composites as supports of Pt for methanol electrooxidation

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Science China Chemistry 2010年第9期53卷 2006-2014页

作者： GAL Jean-Yves UMR Laboratoire Hydrosciences Maison des Sciences de l'Eau de MontpellierUniversite Montpellier Ⅱ

In this study,platinum(Pt)-polyaniline(PANI)/MWNTs catalysts were synthesized by two sequential ***,coreshell structural PANI/MWNTs composites were fabricated by in-situ chemical oxidation polymerization,in which MWNTs act as the core and PANI as the ***,Pt particles were deposited on the PANI/MWNTs composites by a chemical reduction *** morphology and constitution of the products were characterized by FT IR,scanning electron microscopy,transmission electron microscopy and *** was observed that the Pt particles were smaller in size and more uniformly distributed on these composite supports than those on the reference,pure MWNT *** results showed higher Pt(111) content in the catalyst deposited on PANI/MWNTs supports than that on *** cyclic voltammeter(CV) tests demonstrated that the electrode modified by Pt-PANI/MWNTs ternary composite catalyst showed a higher catalytic stability than Pt-MWNT binary catalyst did,due to the synergic interaction between Pt and the composite support.

关键词： polyaniline multi-walled carbon nanotubes in situ polymerization methanol electrooxidation

New Strategy for Chemically Attachment of Imine Group on multi-walled Carbon Nanotubes Surfaces: Synthesis, Characterization and Study of DC Electrical Conductivity

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Journal of Materials Science and Chemical Engineering 2017年第2期5卷 11-21页

作者： Omar Al-Shuja’a Abeer Obeid Yousuf El-Shekeil Mohamed Hashim Zinab Al-Washali Department of Chemistry Faculty of Applied Science Thamar University Thamar Yemen Department of Chemistry Faculty of Science Sana’a University Sana’a Yemen Mechanical Engineering Department College of Engineering Taibah University Madina KSA Department of Environmental Pollution and Pesticides Analysis Faculty of Agriculture Sana’a University Sana’a Yemen

This paper used a new approach of preparing poly-composites by covalent linkage between the MWCNT’s by imine group. The Poly (Imine)/MWCNT Composite was synthesized by the solution blending method from reacted amino multi-walled carbon nanotubes (MWCNT-NH2) with Terephthalaldehyde (TPAL). The obtained poly-composite was characterized by FT-IR, UV-Vis, XRD, TEM, SEM, TGA, DSC and DC electrical conductivity. The formation of Poly (Imine)/MWCNT composite was confirmed. The DC electrical conductivity of poly-composites was within the range 2.3 × 10–4 - 5.3 × 10–4 S/cm due to the interaction between the nanotubes.

关键词： Amino multi-walled Carbon Nanotubes (MWCNT-NH2) Polymer Nanocomposites Functionalization Solution Blending Imine Terephthalaldehyde FTIR SEM TEM XRD UV DSC TGA and DC Electrical Conductivity