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698849

Sigma-Aldrich

Carbon nanotube, multi-walled

greener alternative

>98% carbon basis, O.D. × L 6-13 nm × 2.5-20 μm

Synonym(s):
Multiwall carbon nanotube, MWCNT, MWNT
CAS Number:
NACRES:
NA.23

Quality Level

assay

>98% carbon basis

form

powder

composition

carbon, >98% (total metals impurities)

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

O.D. × L

6-13 nm × 2.5-20 μm

size

10 μm , average length, TEM
12 nm , average diameter, HRTEM

surface area

BET surf. area ~220 m2/g (SSA)

mp

3652-3697 °C (lit.)

density

~2.1 g/mL at 25 °C (lit.)

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General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.
Multi walled carbon nanotubes (MWNTs, CNTs) were prepared by chemical vapor deposition (CVD). In chemical vapor deposition (CVD), a volatile precursor undergoes thermal decomposition at elevated temperatures to form a solid deposit on a substrate. The diameter of the tube ranges between 6-13nm and the average length is 10μm. The multiwalled nanotubes are stable in inert atmosphere upto a temperature of 3697oC. CVD production method is followed by HCl demineralization.

Application

Carbon nanotube, multi-walled (MWNT) belongs to the class of carbonaceous materials with excellent physiochemical, thermo-mechanical and electrochemical properties. This material can be used in a variety of sustainable energy applications such as solar cells, photocatalysis, biosensor, gas sensor, supercapacitor and as a filler that acts as a reinforcement to improve the mechanical property of composites.
A hybrid nanostructure system of MWNTs/titania was fabricated to be used as photodiodes in dye sensitized solar cells. MWNTs were investigated as electrodes for electrochemical biosensors. Use of MWNTs increased the efficacy, sensitivity and mechanical strength of the sensors.

Packaging

1 g in glass bottle

Physical form

average wall thickness 7-13 graphene layers

Preparation Note

Chemical Vapor Deposition (CVD) Method

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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