Poly(m-aminophenol)/functionalized multi-walled carbon nanotube nanocomposite based alcohol sensors
| Autor: | Sushil Kumar Verma, Arup Choudhury, Pradip Kar, Duck J. Yang |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Nanocomposite Metals and Alloys Carbon nanotube Conjugated system Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound symbols.namesake chemistry Chemical engineering Polymerization Electron diffraction law Materials Chemistry symbols Organic chemistry Molecule Methanol Electrical and Electronic Engineering Raman spectroscopy Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 219:199-208 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2015.04.117 |
| Popis: | Carboxyl-functionalized multi-walled carbon nanotube ( c -MWCNT) reinforced poly( m -aminophenol (PmAP) nanocomposite film was fabricated by in-situ chemical oxidation polymerization of m -aminophenol in presence of c -MWCNTs, and exploited it as an effective sensor material for detection of aliphatic alcohols. The presence site-selective interaction between the conjugated PmAP chain and the π-bonded surface of c -MWCNT was confirmed by Fourier transform infrared (FT-IR) and Raman spectroscopy. The morphological analysis of the nanocomposite showed the formation of PmAP coating (thickness ∼100 nm) on the CNT surfaces. The X-ray and electron diffraction patterns of the nanocomposites indicated the crystalline nature of the PmAP matrix. The nanocomposite with small quantity of c -MWCNT (2 wt%) was found to have sensing response about 114% and 96% higher than that of pure PmAP for methanol and ethanol vapor (90 ppm). This dramatic improvement of sensing performance might be attributed to the favorable interactions of c -MWCNTs with conjugated PmAP chains that subsequently generate a pathway for possible H-bonding/dipole interaction with the alcohol molecules. The nanocomposite sensor also exhibits distinct features of the response curves and responsivity values for different aliphatic alcohols, which could be used as a basis for the selective detection of these pollutant vapors. The UV–vis and FT-IR analyses were used to explain the sensing mechanism. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect