Chemiresistive sensing of arsenic ion in water by thin film of poly(m-aminophenol) nano-fiber. Issue 6 (December 2020)

• Record Type: Journal Article
• Authors: Kumari, Supriya; Shruti, Asparshika; Bage, Nirgaman; Ghosh, Barnali Dasgupta; Kar, Pradip
• Is Part Of: Journal of environmental chemical engineering. Volume 8:Issue 6(2020)
• Publication Date: 2020-12
• Subjects: Poly(m-aminophenol) -- Chemiresistive sensor -- Arsenic sensor -- Arsenic detection -- Conducting polymer -- Thin film; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104536
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Highlights: Single-step thin film fabrication of poly( m -aminophenol) nano-fiber on a TLC plate. Novel doping and sensing method by running the mobile solution phase over the TLC. 80–90 % response without theoretical detection limit irrespective of the pH ∼80 % selective response for arsenic ion in presence of other anions or cations. Sensing mechanism has been proposed supported by spectroscopic characterization. Abstract: A single-step process has been demonstrated for the synthesis of poly( m -aminophenol) (PmAP) nano-fiber and fabrication of thin film on a plate of thin layer chromatography (TLC) through crosslinking by ammonium persulfate in dimethyl sulfoxide and it was doped with the sodium ion following solvent running method. The average diameter of PmAP nano-fiber was confirmed as 250 nm which was noted as 200 nm after sodium ion doping. The thin film of PmAP nano-fiber on TLC plate was successfully employed as chemiresistive sensor for arsenic ion, i.e., arsenic(III) or arsenic(V) or their mixture in water. Upon running the aqueous solution of arsenic ion, the resistance of PmAP nano-fiber was decreased showing 80–90 % response without theoretical detection limit irrespective of the pH of the medium. However, a logarithmic relationship was found for the resistance change of PmAP nano-fiber with increasing concentration of arsenic ion in water. Moreover, the PmAP nano-fiber sensor has shown about ∼80 % selective response for arsenic ion in water in presence of other cations or anions. The results have been correlated with the proposed sensing mechanism by considering the unique strong associations of arsenic ions and PmAP nano-fiber through ionic as well as hydrogen bonding interactions.