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Multiwalled carbon nanotubes

Tìm thấy 12+ kết quả cho từ khóa "Multiwalled carbon nanotubes"

Vortex-assisted magnetic solid phase extraction of Pb and Cu in some herb samples on magnetic multiwalled carbon nanotubes

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Determination of trace amounts of Se(IV) by hydride generation atomic fluorescence spectrometry after solid-phase extraction using magnetic multi-walled carbon nanotubes. Vortex assisted magnetic solid phase extraction of lead(II) and cobalt(II)on silica coated magnetic multiwalled carbon nanotubes impregnated with 1-(2-pyridylazo)-2-naphthol. Journal of Molecular Liquids 2016.

Sensitive determination of hydrazine using poly(phenolphthalein), Au nanoparticles and multiwalled carbon nanotubes modified glassy carbon electrode

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Sensitive determination of hydrazine using poly(phenolphthalein), Au nanoparticles and multiwalled carbon nanotubes modified glassy carbon electrode. It can be absorbed through the skin and the acute toxicity of hydrazine affects central nervous system, our blood production, liver and kidney [5,6]. The accurate and economical determination of hydrazine is important for analytical chemistry.

Preparation of a lead sensor based on porous multiwalled carbon nanotubes/thiolated chitosan composite materials

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Ping 17 reported that an ionic liquid modified carbon paste electrode exhibited well-defined and separate stripping voltammetric peaks for cadmium and lead, and the detection limit was 0.10 µ g L − 1 for cadmium and 0.12 µ g L − 1 for lead. proposed a method using multiwall carbon nanotubes/Nafion composite film electrode to detect the heavy metals Pb 2+ and Cd 2+ in real water, and the determination limits were 100 ng L − 1 for Pb and 150 ng L − 1 for Cd.

Fabrication and characterization of enhanced hydrazine electrochemical sensor based on gold nanoparticles decorated on the vanadium oxide, ruthenium oxide nanomaterials, and carbon nanotubes composites

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Synthesis and characterization of co3o4/multiwalled carbon nanotubes nanocomposite for amperometric sensing of hydrazine. doi: 10.1002/elan.201400546

Fabrication of layer-by-layer deposited films containing carbon nanotubes and poly(malachite green) as a sensor for simultaneous determination of ascorbic acid, epinephrine, and uric acid

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The poly(malachite green) (PMG) and multiwalled carbon nanotubes (MWCNTs) were coimmobilized at the surface of the glassy carbon electrode (GCE) for fabrication of PMG/MWCNT/GCE. Using DPV, the obtained catalytic peak current was linearly dependent on the ascorbic acid (AA), epinephrine (EP), and uric acid (UA) concentrations in the ranges of and 0.3–90.0 µ M, respectively. The resul- tant detection limits for AA, EP, and UA were and 0.12 µ M, respectively.

Nghiên cứu cấu trúc của ống nano carbon dưới tác động của các loại bức xạ năng lượng cao định hướng ứng dụng trong môi trường vũ trụ

repository.vnu.edu.vn

Semet, Vu Thien Binh (2003), “Electrical and field emission investigation of individual carbon nanotubes from plasma enhanced chemical vapour deposition”, Diamond and Related Materials,12, pp. Zuppiroli (1999), “Mechanical properties of carbon nanotubes”, Applied Physics A, 69, pp. Li (2002), “Thermal conductivity of multiwalled carbon nanotubes”, Physical Review B, 165440.

Comparative study on physicochemical and mechanical characterization of new nanocarbon-based hydroxyapatite nanocomposites

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on the mechanical properties of hydroxyapatite (Hap)- based nanocomposites (NCs). and/or Gel (Hap_Gel - 152 N/mm 2 ) as additives to reinforce Hap (106 N/mm 2 ) is more appropriate than the use of single functionalized multiwalled carbon nanotubes (Hap_fMWCNT_1.0 - 110 N/mm 2 ) and fullerene (Hap_Ful_0.5 - 106 N/mm 2. however, these mate- rials exhibit bioactivity significantly lower than that of pure Hap.

An ionic liquid/bismuth film-modified sensor for the electrochemical detection of cefixime

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Electrochemical reduction behavior of CEF and its determination was studied at a hanging mercury drop electrode (HMDE) in phar- maceuticals and human urine by Reddy et al. examined the electrooxidation behavior of CEF at gold nanoparticles/multiwalled carbon nanotubes/carbon paste electrode (GNPs/MWCPE). 12 The electrooxidation behavior of CEF on a glassy carbon electrode was shown and detection of CEF in real samples was established by Golcu et al. 13 Voltammetric determination of CEF on multiwalled

Adsorptive performance of MWCNTs for simultaneous cationic and anionic dyes removal; kinetics, thermodynamics, and isotherm study

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Synthesis of bentonite–carbon nanotube nanocomposite and its adsorption of rhodamine dye from water.. Adsorption of reactive dye onto carbon nanotubes: equilibrium, kinetics and thermodynamics. Adsorption of direct dyes from aqueous solutions by carbon nanotubes: determination of equilibrium, kinetics and thermodynamics parameters. Multiwalled carbon nanotubes as adsorbents for the kinetic and equilibrium study of the removal of alizarin red S and morin. Journal of Chemical &

Ultrasound assisted supramolecular liquid phase microextraction procedure for Sudan I at trace level in environmental samples

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Surface polymers on multiwalled carbon nanotubes for selective extraction and electrochemical determination of rhodamine B in food samples. Spectrophotometric determination of molybdenum in steel samples utilizing selective sorbent extraction on Amberlite XAD-8 resin. Journal of Polymers and the Environment 2021.

Speciation of trace metals and metalloids by solid phase extraction with spectrometric detection: a critical review

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Once again multiwalled carbon nanotubes as a solid phase adsorbent were proposed for the on-line speciation and preconcentration of Cr. After reduction of the Cr(VI) to Cr(III) with hydroxylamine hydrochloride, total Cr concentration was determined as Cr(III). As a SPE sorbent, poly(N,N-dipropionitrile methacrylamide-co-divinylbenzene-co-2-acrylamido-2-methyl- 1-propanesulfonic acid) chelating resin was prepared and used for the Cr speciation.

Solid-phase extraction method for preconcentration of cadmium and lead in environmental samples using multiwalled carbon nanotubes

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The effect of the preconcentration parameters was investigated. to 102% with relative standard deviations of 3.2% and 2.8% for Cd 2+ and Pb 2. The limits of detection were 0.2 and 0.5 µ g/L for Cd 2+ and Pb 2. The validation of the proposed preconcentration procedure was performed using certified reference materials with satisfactory and compatible results. The proposed...

Voltammetric determination of phenmedipham herbicide using a multiwalled carbon nanotube paste electrode

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The current study is the first voltammetric report on the determination of phenmedipham herbicide with multiwalled carbon nanotube paste electrode (MWC- NTPEs). Nanoparticle paste electrodes prepared with carbon nanotubes have recently been used extensively in the electrochemical determination of pesticides 28 − 30 in terms of simplicity of paste preparation, low cost, easy surface renewal, fairly good stability, low residual current, easy portability and miniaturization.

Carbon nanotubes as nanofillers

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Carbon nanotubes as nanofillers. Carbon nanotubes as nanofillers . Carbon Nanotubes. Properties of CNT. ‘Kink CNT’: divide conductive and semi­conductive. Carbon nanotubes. CNT’s ­ produced by catalytic decomposition of . Cloisite 30B . 3wt% Cloisite 30B. 1) EVA + Cloisite 30B 2) EVA + CNT’s. 3) EVA + Cloisite 30B + CNT’s Characterisation. Thermogravimetric Analysis of Binary Compositions. EVA + Cloisite 30B. EVA + 3wt% various NTC’s. Crushed MWNT’s. MWNT’s DWNT’s and .

Mô phỏng đặc trưng cơ học vật liệu Nanocomposite nền polymer cốt carbon nanotubes

000000254134.pdf

dlib.hust.edu.vn

Lê Minh Quý Hà Nội – Năm 2011 i MỤC LỤC Trang Lời cam đoan. 1 CHƢƠNG 1: GIỚI THIỆU VỀ CARBON NANOTUBES VÀ NANOCOMPOSITE4 1.1 Carbon nanotubes. 4 1.1.1 Lịch sử phát triển của carbon nanotubes Cấu trúc và phân loại carbon nanotubes Đặc tính của carbon nanotubes Sản xuất carbon nanotubes. 11 1.1.5 Ứng dụng của carbon nanotubes. 15 1.2 Vật liệu nanocomposite Giới thiệu chung. 15 1.2.2 Vật liệu nanocomposite. 18 1.2.3 Nanocomposite nền polymer cốt carbon nanotubes. 19 1.3 Các mô hình nghiên cứu vật liệu

Mô phỏng đặc trưng cơ học vật liệu Nanocomposite nền polymer cốt carbon nanotubes

000000254134-TT.pdf

dlib.hust.edu.vn

TÓM TẮT LUẬN VĂN THẠC SĨ Đề tài: Mô phỏng đặc trưng cơ học của vật liệu nanocomposite nền polymer cốt carbon nanotubes. Tác giả luận văn: Nguyễn Danh Trường Khóa: 2009 Người hướng dẫn: TS. Cho tới nay, đã có nhiều nghiên cứu phát hiện, tìm hiểu và ứng dụng của ống carbon nano (CNT).

Vibration of sandwich beams reinforced by carbon nanotubes under a moving load

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VIBRATION OF SANDWICH BEAMS REINFORCED BY CARBON NANOTUBES UNDER A MOVING LOAD. The cores of the beams are homogeneous while their two sides are made of carbon nanotube reinforced composites. Based on a third-order shear deformation theory, a finite element formulation is derived and used to investigate the vibration characteristics of the beams. Keywords: Sandwich beam. carbon nanotube reinforcement, third-order shear deformation theory. moving load.

Enhanced electrocatalytic activity of copper phthalocyanine/multiwalled carbon nanotube composite electrode via Pt nanoparticle modification for oxygen reduction

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Figures 2a–2f show micrographs of the CuPc-CNT/GCE precursor, where a clean surface is visible with CuPc particles evenly dispersed on the carbon nanotubes. It can be seen that most of the Pt nanoparticles are uniformly dispersed in the range of 3–6 nm on the CuPc-CNT/GCE support (Figures 2g–2l). After platinum deposition, aggregates (such as Pt-containing cluster compounds) appear on the CuPc-modified CNTs.

Ảnh hưởng của nhiệt độ lên khối lượng hiệu dụng và độ rộng khe dải năng lượng điện tử trong ống bán dẫn carbon nano

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Ando, “Effective-Mass Theory of Electron Correlations in Band Structure of Semiconducting Carbon Nanotubes,” J. Ando, “Effective-mass approach to interaction effects on electronic structure in carbon nanotubes,” Physica E 22, 2004, pp. Ando, “Theory of Electronic States and Transport in Carbon Nanotubes,” J. [7] Seiji Uryu and Tsuneya Ando, “Exciton absorption of perpendicularly polarized light in carbon nanotubes,” Phys. Ando, “Electronic states of carbon nanotubes,” J.

Carbon

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Conductive nanotubes of several nanometer diameters can be used as the tips of detecting electrodes of the scanning tunneling microscope (STM) or the atomic force microscope (AFM), where the precision will be dramatically enhanced.. Diamond is one of the most precious jewels as it is highly stable, hard, col- orless, transparent, and the refractive index is very high (n D ¼ 2.417). Figure 21 Several types of the bundle of single-walled carbon nanotubes (SWCN).