4.7 Article

Fabrication of graphene oxide-p-phenylenediamine nanocomposites as fluorescent chemosensors for detection of metal ions

Journal

ENVIRONMENTAL RESEARCH
Volume 204, Issue -, Pages -

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111914

Keywords

Graphene oxide; p-Phenylenediamine; Nanocomposites; Chemosensor; Metal ions; Water analysis

Funding

  1. Centre for Nanotechnology of Karunya Institute of Technology and Sciences
  2. Deanship of Scientific Research at King Saud University [RG-1438-091]

Ask authors/readers for more resources

Graphene oxide-p-Phenylenediamine nanocomposites of different ratios were prepared and characterized for their potential use as chemical sensors to detect metal ions. The nanocomposites showed selectivity and sensitivity towards different metal ions, with the ability to detect ions at physiological pH levels.
In this work, graphene oxide-p-Phenylenediamine nanocomposites of two different ratios of Graphene oxide: p-Phenylenediamine (1:1 and 1:5) were prepared and characterized by using analytical, spectroscopic and microscopic studies (GO-pPD 11 and GO-pPD 15). These nanocomposites were employed as fluorescent che-mosensors for sensing potential cations. Remarkably, graphene oxide-p-Phenylenediamine nanocomposites of ratio 1:1 (GO-pPD 15) was selective and sensitive to Ag+ ions, whereas the graphene oxide-p-Phenylenediamine nanocomposites of ratio 1:5 (GO-pPD 15) was selective to Ce3+ ions. A possible mechanism as switch off-on is proposed built on the inhibition of the photo induced electron transfer process in both the fluorescent probes in detecting the metal ions. In addition, interference studies were performed with the help of competitive complexation analysis and no significant interference were found by other potentially competing cations. The pH studies revealed that both the chemosensors can be used at the physiological pH for the ion detection and also the detection time was within 2-3 min. Both the chemosensors show good reversibility and hence the sensors can be used for multiple times. The newer nanocomposites were then utilized in the real water sample analysis as to check its real level application purpose.

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