Design of a fluorescent method by using ZnS QDs-gelatin nanocomposite for sensing toxic 2-mercaptobenzothiazole in water samples

Abstract

In this study, the residue of toxic 2-mercaptobenzothiazole, a semi-volatile heteroaromatic, was extracted from wastewater using a new spectrofluorometric method. The method is based on measuring 2-Mercaptobenzothiazole the quenching effect on the fluorescence intensity of ZnS quantum dot–gelatin nanocomposite in (pH 4, λ_ex 310 and λ_em 345 nm, in time 60 s). Different factors affecting the reaction were studied and optimized. The calibration plot is linear in the concentration range of (0.05–10.0 µgL⁻¹). The relative standard deviations and the detection limit of the method were ±1.0% and 0.05 μgL⁻¹, respectively. Observed, outcomes confirmed the suitability recovery and a meager detection limit for analyzing toxic 2-Mercaptobenzothiazole in water samples. The preliminary results from this study demonstrate that this new method can be used to analyze 2-mercaptobenzothiazole in wastewater.

GRAPHICAL ABSTRACT

KEYWORDS:

• 2-mercaptobenzothiazole
• sensor
• ZnS QDs-gelatin synthesis
• fluorescence
• quantum dots

Acknowledgements

We gratefully thank Islamic Azad University, Branch of Islamshahr, Iran, for financial support.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The present research has been supported by research of the Islamic Azad University, Branch of Islamshahr, Iran.