scholarly journals Preparation and Characteristics of SiOx Coated Carbon Nanotubes with High Surface Area

Nanomaterials ◽  
2012 ◽  
Vol 2 (2) ◽  
pp. 206-216 ◽  
Author(s):  
Aeran Kim ◽  
Seongyop Lim ◽  
Dong-Hyun Peck ◽  
Sang-Kyung Kim ◽  
Byungrok Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Coated Carbon

scholarly journals Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1328 ◽  
Author(s):  
Marlon Danny Jerez-Masaquiza ◽  
Lenys Fernández ◽  
Gema González ◽  
Marjorie Montero-Jiménez ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Properties ◽  
Electrochemical Sensor ◽  
Prussian Blue ◽  
Surface Area ◽  
Glassy Carbon ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemically Deposited ◽  
Area X

In this work, a new hydrogen peroxide (H2O2) electrochemical sensor was fabricated. Prussian blue (PB) was electrodeposited on a glassy carbon (GC) electrode modified with zirconia doped functionalized carbon nanotubes (ZrO2-fCNTs), (PB/ZrO2-fCNTs/GC). The morphology and structure of the nanostructured system were characterized by scanning and transmission electron microscopy (TEM), atomic force microscopy (AFM), specific surface area, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman and Fourier transform infrared (FTIR) spectroscopy. The electrochemical properties were studied by cyclic voltammetry (CV) and chronoamperometry (CA). Zirconia nanocrystallites (6.6 ± 1.8 nm) with cubic crystal structure were directly synthesized on the fCNTs walls, obtaining a well dispersed distribution with a high surface area. The experimental results indicate that the ZrO2-fCNTs nanostructured system exhibits good electrochemical properties and could be tunable by enhancing the modification conditions and method of synthesis. The fabricated sensor could be used to efficiently detect H2O2, presenting a good linear relationship between the H2O2 concentration and the peak current, with quantification limit (LQ) of the 10.91 μmol·L−1 and detection limit (LD) of 3.5913 μmol·L−1.

An approach to carbon nanotubes with high surface area and large pore volume

2007 ◽  
Vol 100 (1-3) ◽  
pp. 1-5 ◽  
Author(s):  
Jun Jie Niu ◽  
Jian Nong Wang ◽  
Ying Jiang ◽  
Lian Feng Su ◽  
Jie Ma
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Large Pore ◽  
Large Pore Volume

High surface area carbon nanotubes prepared by chemical activation

Carbon ◽  
2002 ◽  
Vol 40 (9) ◽  
pp. 1614-1617 ◽  
Author(s):  
E Raymundo-Piñero ◽  
D Cazorla-Amorós ◽  
A Linares-Solano ◽  
S Delpeux ◽  
E Frackowiak ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Chemical Activation ◽  
High Surface ◽  
High Surface Area

Fabrication of high surface area graphitic nanoflakes on carbon nanotubes templates

2005 ◽  
Vol 14 (11-12) ◽  
pp. 1897-1900 ◽  
Author(s):  
Chien-Chung Chen ◽  
Chia-Fu Chen ◽  
I-Hsuan Lee ◽  
Chien-Liang Lin
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

Growth of Carbon Nanotubes on Carbon Toray Paper for Bio-Fuel Cell Applications

2007 ◽  
Author(s):  
Bhupesh Chandra ◽  
Joshua T. Kace ◽  
Yuhao Sun ◽  
S. C. Barton ◽  
James Hone
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cell ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Multiwall Carbon Nanotubes ◽  
Volume Ratio ◽  
Carbon Paper ◽  
Heating Process ◽  
Scale Production

In recent years carbon nanotubes have emerged as excellent materials for applications in which high surface area is required e.g. gas sensing, hydrogen storage, solar cells etc. Ultra-high surface to volume ratio is also a desirable property in the applications requiring enhanced catalytic activity where these high surface area materials can act as catalyst supports. One of the fastest developing areas needing such materials is fuel-cell. Here we investigate the process through which carbon nanotubes can be manufactured specifically to be used to increase the surface area of a carbon paper (Toray™). This carbon support is used in bio-catalytic fuel cell as an electrode to support enzyme which catalyzes the redox reaction. Deposition of nanotubes on these carbon fibers can result in great enhancement in the overall surface area to support the enzyme, which increases the reaction rate inside the fuel cell. The present paper describes a method to achieve ultra-thick growth of multiwall carbon nanotubes (MWNT) on a carbon Toray™ paper using a joule heating process and gas-phase catalyst. Using this method, we are able to achieve rapid, high-density, and uniform MWNT growth. This method is also potentially scalable toward larger-scale production.

High Surface Area Electrodes Derived from Polymer Wrapped Carbon Nanotubes for Enhanced Energy Storage Devices

2016 ◽  
Vol 8 (37) ◽  
pp. 24918-24923 ◽  
Author(s):  
Amir A. Bakhtiary Davijani ◽  
H. Clive Liu ◽  
Kishor Gupta ◽  
Satish Kumar
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Energy Storage Devices ◽  
Storage Devices

Advanced life support for space exploration: Air revitalization using amine coated single wall carbon nanotubes.

2004 ◽  
Vol 851 ◽  
Author(s):  
Padraig Moloney ◽  
Chad Huffman ◽  
Olga Gorelik ◽  
Pasha Nikolaev ◽  
Sivaram Arepalli ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Life Support ◽  
High Surface ◽  
High Surface Area ◽  
Single Wall Carbon Nanotubes ◽  
Space Vehicles ◽  
Free Standing ◽  
Single Wall Carbon ◽  
Long Duration

ABSTRACTThe challenges posed by long duration human space flight have made regenerable air revitalization a critical technology. Current systems using disposable lithium hydroxide do not address the difficulties presented by long duration missions. Solid amine systems offer the capability to regeneratively adsorb CO2 using an amine—impregnated porous substrate. Desorption of CO2 is then achieved by exposing the system to vacuum or by increasing temperature. However, thermal inefficiencies and system size constraints prevent adoption of regenerable systems on current and future space vehicles. A key challenge is the thermal management of the adsorbing bed. The adsorbing surface increases in temperature which reduces adsorbing efficiency. The removal of CO2 reduces temperature, which in turn produces a loss in regeneration efficiency. These thermal inefficiencies necessitate prohibitively large volumes of traditional solid-amine materials, which do not have optimized surface areas and pore distributions. Single-wall carbon nanotubes (SWCNTs) may provide a means to increase surface area of the amine support and thermal efficiency. Recent work by Cinke et. al. provided a method of functionalizing SWCNTs and increasing the surface area to the order of 1500 m2/g [1]. We will report on the production of free standing, high surface area carbon nanotube structures currently being impregnated with amines. This novel SWCNT/amine approach will be compared with the current state of the art polymer structure-based system and characterized using SEM, TEM, surface area analysis through Brunauer-Emmett-Teller (BET), and also thermogravimetric equilibrium absorption. Results of SWCNT material improvements from processing modifications will also be presented.

Electron Field Emission from Graphitic Nanoflakes Grown Over Vertically Aligned Carbon Nanotubes

2008 ◽  
Vol 8 (8) ◽  
pp. 4309-4313 ◽  
Author(s):  
S. Chhoker ◽  
S. K. Arora ◽  
P. Srivastava ◽  
V. D. Vankar
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Field Emission ◽  
Deposition Time ◽  
Microwave Plasma ◽  
High Surface ◽  
Carbon Film ◽  
High Surface Area ◽  
Carbon Films ◽  
Single Step

Single step growth of self-assembled graphitic nanoflakes (GNF) over carbon nanotubes (CNT) on iron coated silicon(100) substrates is reported. These nanostructures were grown by varying the deposition time in a microwave plasma enhanced chemical vapor deposition reactor using acetylene, hydrogen and argon as reactant gases. Scanning electron microscope (SEM) studies of the deposited carbon films revealed that with increase in deposition time from 3 minutes to 6 minutes, the surface topography of the films transformed from one dimensional cylindrical nanostructure to flat-shaped two-dimensional nanoflakes. Carbon film deposited for 5 minutes showed improved surface coverage as compared to films deposited for 6 minutes i.e., surface area of the CNT film covered with nanoflakes increased as compared to carbon film deposited for higher durations. Field emission studies of films deposited at 5 minutes and 6 minutes showed increase in turn-on field, required for electron emission, from 2.7 V/μm to 2.9 V/μm respectively. However, such a combination of one dimension carbon and two dimension carbon may prove useful in applications where high surface area films are required.

Effect of Pretreatment of Synthetic and Natural Carbons as Starting Materials for Carbon Nanotubes

2005 ◽  
Vol 23 ◽  
pp. 285-288 ◽  
Author(s):  
N. Buang ◽  
M. Aziz ◽  
S. Sanip ◽  
J.C. Tee ◽  
Z.H.Z Abidin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Energy Storage And Conversion ◽  
Thermal Treatments ◽  
Active Materials ◽  
And Chemical Properties

Carbon are well known as active materials for energy storage and conversion. They are preferred because carbon materials have high electrical conductivity, low cost, high surface area, porosity, formability and possess good chemical and electrochemical resistivity. The most recently discovered novel carbon material is the carbon nanotubes, having unique geometrical structure and stable mechanical and chemical properties. The starting materials for carbon nanotubes production widely used are high purity graphite. Thus, two types of carbons were studied and thermal treatments were conducted at temperatures ranging from 600 – 800 °C for several hours. The effect of the pretreatment upon their morphology and surface area were looked into. It was found that significant changes occurred for the natural carbons while the synthetic carbons showed little or no changes at the particular temperature range. The thermal treatment has resulted in the exposure of fresh edge planes and microparticles as well as changes in the specific surface area and enhances their adsorption properties.

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