Preparation and characterization of novel polyaniline nanosensor for sensitive detection of formaldehyde
Omara, Wessam; Amin, Rehab; Prof. Dr. Hanan Gouda Abdelwahab Ahmed Elhaes; Ibrahim, Medhat; Elfeky, Souad A.;
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.
Other data
Title | Preparation and characterization of novel polyaniline nanosensor for sensitive detection of formaldehyde | Authors | Omara, Wessam; Amin, Rehab; Prof. Dr. Hanan Gouda Abdelwahab Ahmed Elhaes ; Ibrahim, Medhat; Elfeky, Souad A. | Keywords | EB-PANI;Polyaniline nanosensor;Molecular modeling;HF/3-21G**;Formaldehyde | Issue Date | 1-Jan-2015 | Publisher | BENTHAM SCIENCE PUBL LTD | Journal | Recent Patents on Nanotechnology | Volume | 9 | Issue | 3 | Start page | 195 | End page | 203 | ISSN | 18722105 | DOI | 10.2174/1872210510999151126112509 | PubMed ID | 27009134 | Scopus ID | 2-s2.0-84960953878 | Web of science ID | WOS:000366197200003 |
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