gases like ammonia, nitrogen, carbon dioxide, sulfur dioxide, dichloromethane and
carbon tetrachloride, benzene, toluene, xylene, and methanol (Tang et al. 2007). The
responses of the nanocomposite of poly(m-aminophenol) doped with 2 weight
percentage of carboxylic acid-functionalized MWCNT toward aliphatic alcohol
vapor were substantially improved compared to pure polymer, and responses/sensitivity for methanol and ethanol was explained as the basis for the selective detection
(Verma et al. 2015, 2017a). Further, the selectivity of the poly(m-aminophenol) was
further improved toward methanol by using nanocomposite with copper
nanoparticles (Bhuyan et al. 2018). Similarly, the nanocomposite of poly
(m-aminophenol)/amine group functionalized MWCNT was found to be selective
toward ethanol vapor (Verma et al. 2017b). Ultrasensitive reduced graphene oxide
and three-dimensional zinc oxide nanoflower composite offered excellent selectivity
toward 2-propanol against interfering neighbors like ethanol, methanol, acetone, and
benzene (Acharyya et al. 2018).
Polydiacetylene-encapsulated electrospun fiber-based colorimetric sensor has
been developed for volatile organic compounds, such as chloroform, tetrahydrofuran, ethyl acetate, and hexane (Yoon et al. 2007). The sensing performance of porous
hierarchical indium oxide micro-/nanostructures has been investigated for volatile
organic compounds (methanol, toluene, and formaldehyde), and as shown in
Fig. 10.24, the sensor was found to have selectivity for methanol gas sensing in
terms of better response (Liu et al. 2010). The polyaniline nanocomposite with 2 wt
% carboxylic acid group functionalized MWCNT nanocomposite exhibited good
selectivity toward chloroform vapor over the other chlorinated methane vapor like
chloromethane, dichloromethane, and carbon tetrachloride (Kar and Choudhury
2013). The conducting polyaniline nanofiber was tested as a sensor to the aromatic
Carbon tetrachloride
Dichloromethane
Sulfur dioxide
Carbon dioxide
Formaldehyde
Ammonia
Methanol
Xylene
Toluene
Benzene
Ethanol
0
500
1000 1500 2000 2500 3000 3500
Gas
Relative cataluminescence intensity
Fig. 10.23 Selectivity of the cataluminescence ethanol sensor on the surface of zinc oxide
nanoparticles. (Reprinted with permission of Elsevier from Tang et al. 2007)
382
P. Kar
carbon tetrachloride, benzene, toluene, xylene, and methanol (Tang et al. 2007). The
responses of the nanocomposite of poly(m-aminophenol) doped with 2 weight
percentage of carboxylic acid-functionalized MWCNT toward aliphatic alcohol
vapor were substantially improved compared to pure polymer, and responses/sensitivity for methanol and ethanol was explained as the basis for the selective detection
(Verma et al. 2015, 2017a). Further, the selectivity of the poly(m-aminophenol) was
further improved toward methanol by using nanocomposite with copper
nanoparticles (Bhuyan et al. 2018). Similarly, the nanocomposite of poly
(m-aminophenol)/amine group functionalized MWCNT was found to be selective
toward ethanol vapor (Verma et al. 2017b). Ultrasensitive reduced graphene oxide
and three-dimensional zinc oxide nanoflower composite offered excellent selectivity
toward 2-propanol against interfering neighbors like ethanol, methanol, acetone, and
benzene (Acharyya et al. 2018).
Polydiacetylene-encapsulated electrospun fiber-based colorimetric sensor has
been developed for volatile organic compounds, such as chloroform, tetrahydrofuran, ethyl acetate, and hexane (Yoon et al. 2007). The sensing performance of porous
hierarchical indium oxide micro-/nanostructures has been investigated for volatile
organic compounds (methanol, toluene, and formaldehyde), and as shown in
Fig. 10.24, the sensor was found to have selectivity for methanol gas sensing in
terms of better response (Liu et al. 2010). The polyaniline nanocomposite with 2 wt
% carboxylic acid group functionalized MWCNT nanocomposite exhibited good
selectivity toward chloroform vapor over the other chlorinated methane vapor like
chloromethane, dichloromethane, and carbon tetrachloride (Kar and Choudhury
2013). The conducting polyaniline nanofiber was tested as a sensor to the aromatic
Carbon tetrachloride
Dichloromethane
Sulfur dioxide
Carbon dioxide
Formaldehyde
Ammonia
Methanol
Xylene
Toluene
Benzene
Ethanol
0
500
1000 1500 2000 2500 3000 3500
Gas
Relative cataluminescence intensity
Fig. 10.23 Selectivity of the cataluminescence ethanol sensor on the surface of zinc oxide
nanoparticles. (Reprinted with permission of Elsevier from Tang et al. 2007)
382
P. Kar