Glutathione-capped Syzygium cumini carbon dot-amalgamated agarose hydrogel film for naked-eye detection of heavy metal ions

Jigna R Bhamore,Tae Jung Park,Suresh Kumar Kailasa

doi:10.1186/s40543-020-00208-8

Abstract

Development of a facile and sensitive analytical tool for the detection of heavy metal ions is still a challenging task because of interference from other chemical species. In this work, glutathione (GSH)-capped Syzygium cumini carbon dots (CDs) have been integrated with agarose hydrogel film and used as an amalgamated solid probe for sensing of different metal ions (Pb2+, Fe3+, and Mn2+). The synthesis of a solid sensing platform is based on the electrostatic interactions between GSH-capped Syzygium cumini CDs and agarose hydrogel. The developed hydrogel-based solid probe exhibited good linearities with the concentration ranges of metal ions from 0.005 to 0.075, 0.0075 to 0.1, and 0.0075 to 0.1 mM with detection limits of 1.3, 2.5, and 2.1 μM for Pb2+, Fe3+, and Mn2+ ions, respectively.

Highlights

Heavy metal ions have been considered as potential agents to contaminate various environments including water, soil, and air (Gong et al 2016)
Fluorescent carbon dots (CDs) were fabricated from Syzygium cumini fruits and functionalized with GSH
A green and one-step synthetic method was developed for the fabrication of GSH-capped CD agarose hydrogel film

Summary

Introduction

Heavy metal ions have been considered as potential agents to contaminate various environments including water, soil, and air (Gong et al 2016). Hydrogel-based visual strips have been fabricated for the detection of metal ions (Pb2+, Fe3+, and Mn2+) by incorporating glutathione (GSH)-capped fluorescent CDs into hydrogels.

Results

Conclusion