Abstract
The CdS quantum dots (QDs) were prepared by rapid, one-pot, and novel photochemical method, which used Thioglycolic acid (TGA) molecules as both stabilizer and sulfur source. The structure and morphology of the prepared CdS QDs were characterized by different analyses such as XRD, FT-IR, Raman, EDS, TEM, PL, and absorption. In this work, was used of CdS QDs as off fluorescence sensor for rapid and simple detection of lead (Pb2+) ions in water. The PL intensity of CdS QDs in the presence of lead ions decreased gradually and in the presence of 100 μM lead ions, photo emission completely quenched. The photocatalyst performance of CdS QDs was investigated by methylene blue (MB), methylene orange (MO), and rhodamine b (RB) pollutant dyes under both UV and sun lights. The obtained results showed that CdS QDs had excellent photocatalyst activity with dyes under UV light and 94.9% of MO dye, 94.4% of RB dye, and 81.2% of MB was degraded after 60 min UV irradiation. For understanding about which parameter have a key role in the photodegradation process of MO by CdS QDs under UV illumination, several radical scavengers were used, and results showed that holes have a key role in the degradation process.
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All data of this paper are available and included in the manuscript. This work was done in the nanoscience lab of the Vali-e-Asr University of Rafsanjan, Iran, this article is original, this article has been written by the stated authors who are ALL aware of its content and approve its submission. This article has not been published previously.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Farzad Farahmandzadeh, Samira Salehi, Mehdi Molaei, Haniyeh Fallah, and Vajihe Nejadshafiee. The first draft of the manuscript was written by Farzad Farahmandzadeh. All authors read and approved the final manuscript.
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Farahmandzadeh, F., Salehi, S., Molaei, M. et al. CdS Semiconductor Quantum Dots; Facile Synthesis, Application as Off Fluorescent Sensor for Detection of Lead (Pb2+) Ions and Catalyst for Degradation of Dyes from Water. J Fluoresc 33, 1515–1524 (2023). https://doi.org/10.1007/s10895-023-03157-8
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DOI: https://doi.org/10.1007/s10895-023-03157-8