4.7 Article

Binary organic-inorganic nanocomposite of polyaniline-MnO2 for non-enzymatic electrochemical detection of environmental pollutant nitrite

Journal

ENVIRONMENTAL RESEARCH
Volume 214, Issue -, Pages -

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2022.114066

Keywords

Electrochemical sensing; Organic -inorganic nanocomposite; Nitrite oxidation; Manganese dioxide; Polyaniline

Funding

  1. Sichuan Science and Tech- nology Program [2022JDRC0070]
  2. Chengdu University of Tech- nology Development Funding Program for Young and Middle-aged Key Teachers [10912-JXGG2020-07362]

Ask authors/readers for more resources

A binary hybrid polyaniline-MnO2 organic-inorganic nanocomposite was prepared and successfully applied for electrochemical sensing of nitrite. The nanocomposite exhibited broad linear ranges and low limits of detection, and showed satisfactory sensing performance in real water sample analysis. The amine and imino groups of polyaniline improved the adsorption behavior of nitrite on the nanocomposite, enhancing its sensing performance.
Due to wide usage as nitrogen fertilizer in agriculture and food additive in industry, nitrite, as one of inorganic environmental pollutants, could cause detrimental effects to the ecological environment. Therefore, accurate, sensitive and rapid detection of nitrite is necessary. In this work, binary hybrid polyaniline-MnO2 organic -inorganic nanocomposite is prepared chemically and characterized via X-ray diffraction spectroscopy, Fourier -transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. Pol-yaniline-MnO2 organic-inorganic nanocomposite serves as excellent electrode modifier for electrochemical sensing of nitrite by two modes of cyclic voltammetry and chronoamperometry, achieving broad linear ranges and low limits of detection for both methods. Moreover, the organic-inorganic nanocomposite displays satisfactory sensing performance in real water sample analysis. Amine and imino groups of polyaniline contribute to the better adsorption behavior of nitrite onto the nanocomposite, which improves the nanocomposite's sensing performance. In summary, the synergistic effects between polyaniline and MnO2 is taken advantaged in the nanocomposite for effective electrochemical sensor development.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available