Development of Electrospun Polyaniline/ZnO Composite Nanofibers for LPG Sensing

Abstract

In this paper we report the highly sensitive at low temperature and low concentration of liquefied petroleum gas (LPG) sensor based on D-Camphor-10-Sulphonic acid (CSA) doped Polyaniline/Polyethylene Oxide (PANI/PEO) and PANI/ZnO/PEO nanofibers fabricated by electrospinning technique. Nano-sized particles of zinc oxide (ZnO) were synthesized using sol-gel method. The emeraldine base form of polyaniline (PANI) and PANI/ZnO synthesized by chemical oxidative polymerization were treated with CSA for better solubility and conductivity and then blended with PEO solution to get nanofibers using electrospinning. The morphology and structure of electrospun nanofibers of CSA doped PANI/PEO and PANI/ZnO/PEO were investigated by SEM, UV-VIS, FTIR and XRD. The change in electrical resistance of CSA doped PANI/PEO and PANI/ZnO/PEO for 1000 ppm of LPG was measured. Both the samples showed a rapid and reversible resistance change upon exposure to LPG gas at 1000 ppm concentration. Maximum sensitivity was achieved at 36 °C for PANI/ZnO/PEO indicating suitability of nanofibrous PANI/ZnO/PEO towards LPG sensing as compared to pure ZnO and PANI.

Synthesis and Characterization of Polyaniline Nanoparticle by Inverse Micelle Microemulsion Method

“…(Figure 4). And the spectra agree to that previously reported [7,31]. Stretching vibration of the -N-H group is observed in 3220-3266 1/cm.…”

“…The synthesized polyaniline forms an emeraldine salt (ES) as a brown powder. Similar emeraldine salt is also previously reported using different techniques [7,12,31]. This powder basically composed of a very tiny dot of aggregated polyaniline.…”

“…Moreover, organic polymer with conductive properties also attracts attention. Complement to these physical properties, the organic conductive polymer also gain attention for certain purposes, such as for solar cell [1], light emitting diode [2,3], conductive ink, sensor [4][5][6][7], semiconductor [8], super-capacitor [9], energy storage [10], catalysis and catalyst supporting material [11][12][13]. In our ongoing research finding non-metallic material catalyst for alpha-pinene oxidation [14][15][16] into more valuable chemicals, it turned up on polyaniline nanoparticle (PANI-NP) as prospectus catalyst.…”

Comparative Photocatalytic Degradation of Rose Bengal Dye under Visible Light by TiO2, TiO2/PAni and TiO2/PAni/GO Nanocomposites

“…On the other hand, a slight reduction in the peak intensity and red shift was observed for TiO 2 peaks in the TiO 2 /PAninanocomposite [29]. This might be due to the surface coating of PAni on TiO 2 during the polymerization process and the interactions between the TiO 2 nanoparticles and the PAni chain [30]. These results confirm the presence of PAni and GO in nanocomposite [31].…”

“…The UV spectrum has been taken for TiO 2 , TiO 2 /PAni and TiO 2 /PAni/GO nanocomposite at different irradiation time (30,60,90, 120 and 180 min) (Fig. 4).…”