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Surface functionalized cadmium telluride quantum dots for the optical detection and determination of herbicides

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Abstract

An optical sensor for detection of herbicides was developed through the functionalization of CdTe quantum dots (CdTe-QDs) with cysteamine hydrochloride. The functionalized CdTe-QDs was characterized with various physicochemical methods such as X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray analysis, Ultraviolet–visible and photoluminescence spectroscopies. The optical band gap of the functionalized CdTe-QDs as calculated by using Tauc plot was 3.75 eV. It was found that the fluorescence intensity of the functionalized CdTe-QDs quenched linearly in the presence of different herbicides according to the Stern–Volmer equation. Thus, the functionalized CdTe-QDs can be used as simple, rapid, inexpensive, and optical sensitive sensor for practical detection of herbicides.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Chemistry, Arak University, Arak, Islamic Republic of Iran

    S. Mahdavi, H. Khanmohammadi & M. Masteri-Farahani

  2. Faculty of Chemistry, Kharazmi University, Tehran, Islamic Republic of Iran

    S. Mahdavi, H. Khanmohammadi & M. Masteri-Farahani

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  1. S. Mahdavi
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  2. H. Khanmohammadi
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  3. M. Masteri-Farahani
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Correspondence to M. Masteri-Farahani.

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Mahdavi, S., Khanmohammadi, H. & Masteri-Farahani, M. Surface functionalized cadmium telluride quantum dots for the optical detection and determination of herbicides. J Mater Sci: Mater Electron 29, 6254–6259 (2018). https://doi.org/10.1007/s10854-018-8602-6

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  • DOI: https://doi.org/10.1007/s10854-018-8602-6

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