Linear free energy relationships for the adsorption of volatile organic compounds onto multiwalled carbon nanotubes at different relative humidities: comparison with organoclays and activated carbon

2017 ◽  
Vol 19 (3) ◽  
pp. 276-287 ◽  
Author(s):  
Mei-syue Li ◽  
Reuben Wang ◽  
Dave Ta Fu Kuo ◽  
Yang-hsin Shih
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Linear Free Energy Relationships ◽  
Multiwalled Carbon ◽  
Linear Free Energy ◽  
Volatile Organic ◽  
Energy Relationships ◽  
Effective Assessment

Adsorption behavior of volatile organic compounds (VOCs) on carbon nanotubes is critical for developing effective assessment and treatments for nanomaterial-bound contaminants.

scholarly journals Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

2015 ◽  
Vol 6 ◽  
pp. 919-927 ◽  
Author(s):  
Hamdi Baccar ◽  
Atef Thamri ◽  
Pierrick Clément ◽  
Eduard Llobet ◽  
Adnane Abdelghani
Keyword(s):  
Carbon Nanotubes ◽  
Volatile Organic Compounds ◽  
Multiwalled Carbon Nanotubes ◽  
Organic Compounds ◽  
Room Temperature ◽  
Surface Defects ◽  
Pd Nanoparticles ◽  
Oxygen Plasma Treatment ◽  
Multiwalled Carbon ◽  
Volatile Organic

Here we report on the gas sensing properties of multiwalled carbon nanotubes decorated with sputtered Pt or Pd nanoparticles. Sputtering allows for an oxygen plasma treatment that removes amorphous carbon from the surface of the carbon nanotubes and creates oxygenated surface defects in which metal nanoparticles nucleate within a few minutes. The decoration with the 2 nm Pt or the 3 nm Pd nanoparticles is very homogeneous. This procedure is performed at the device level (i.e., for carbon nanotubes deposited onto sensor substrates) for many devices in one batch, which illustrates the scalability for the mass production of affordable nanosensors. The response to selected aromatic and non-aromatic volatile organic compounds, as well as pollutant gases has been studied. Pt- and Pd-decorated multiwalled carbon nanotubes show a fully reversible response to the non-aromatic volatile organic compounds tested when operated at room temperature. In contrast, these nanomaterials were not responsive to the aromatic compounds studied (measured at concentrations up to 50 ppm). Therefore, these sensors could be useful in a small, battery-operated alarm detector, for example, which is able to discriminate aromatic from non-aromatic volatile organic compounds in ambient.

Sign in / Sign up

Export Citation Format

Share Document