Preparation and Characterization of Novel Polyaniline Nanosensor for Sensitive Detection of Formaldehyde

Title:Preparation and Characterization of Novel Polyaniline Nanosensor for Sensitive Detection of Formaldehyde

Volume: 9 Issue: 3

Author(s): Wessam Omara, Rehab Amin, Hanan Elhaes, Medhat Ibrahim and Souad A. Elfeky

Affiliation:

Keywords: EB-PANI, Formaldehyde, HF/3-21G**, molecular modeling, polyaniline nanosensor.

Abstract: Nanomaterials are promising in the field of optical sensors due to their unique properties. Emeraldine base of polyaniline (Nano EB-PANI) was prepared, characterized and applied as an optical formaldehyde sensor. FTIR data confirm the formation of the EB-PANI. TEM and SEM revealed the size and shape of the nanoscale EB-PANI. XRD showed that the obtained nano EB-PANI has a partial crystalline nature. The sensing mechanism is based on the reaction of formaldehyde with Nano EB-PANI- to form a complex as described by molecular modeling HF/3-21G** level of theory. Results showed that Nano EB-PANI- detect low concentrations of formaldehyde ranging from 0.0003 to 0.9 ppm in a dosedependent manner. The molecular modeling theory analysis showed that formaldehyde could interact with the amine of EB-PANI in, ring 3 or 4 or both together. The binding energy and dipole moment of the interaction between formaldehyde and polyaniline nanosensor were calculated by HF/3-21g** level of theory. The interaction with ring 3-NH gives a less stable product with a high dipole moment 6.978 Debye comparing with 1.678 Debye for the product of formaldehyde interaction with the terminal ring 4-NH. The development of such novel EB-PANI nanosensor can be used as, reliable and sensitive formaldehyde sensor.

Cite this article as:

Omara Wessam, Amin Rehab, Elhaes Hanan, Ibrahim Medhat and A. Elfeky Souad, Preparation and Characterization of Novel Polyaniline Nanosensor for Sensitive Detection of Formaldehyde, Recent Patents on Nanotechnology 2015; 9 (3) . https://dx.doi.org/10.2174/1872210510999151126112509