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Cu/Ag@Tris(2-carboxyethyl) isocyanurate Composites: Cu-Doping Tune the Fluorescence Recognition of Metronidazole Antibiotics and Photodegradation of Rhodamine B Dye with Enhance Antibacterial Activity
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DOI：10.1039/D6NJ01816E.png)
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Abstract
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The occurrence of antibiotics as contaminants in the aquatic and terrestrial environments has become a serious threat to the environment owing to the possibility of causing antimicrobial resistance and altering ecological balance. In this study; an efficient strategy has been adopted to create metal-containing organic crystalline composites of Cu@OC and Ag@OC (Cu/Ag:OC = 1:1; 1:2; and 1:3) by incorporating Cu²⁺ and Ag⁺ ions into the supramolecular structure of tris(2-carboxyethyl) isocyanurate (OC-1). The formation of these crystalline composites has been confirmed by structural characterization techniques such as FTIR; PXRD; SEM-EDX; and XPS; along with elemental analysis. Regarding the prepared materials; Cu@OC-1 showed a highly significant quenching ability for MTZ; with an efficiency of 97.65%; a Stern-Volmer constant of 3.04 × 10⁴ M⁻¹; and a detection limit of 0.547 ppm. As for Ag@OC-1; it performed well for RXM sensing; with a quenching efficiency of 94.60% and a detection limit of 1.590 ppm. Additionally; Cu@OC-1 demonstrated high photocatalytic performance in the photodegradation of RhB under solar light; achieving 98.24% degradation efficiency in 150 minutes. Pseudo-first-order degradation kinetics were found to be applicable to the process. Radicals involved included O2•⁻ and •OH; which were the main dominant reactive intermediates. The incorporation of Cu and Ag ions has also resulted in considerable improvements in antibacterial properties against both Staphylococcus aureus and Escherichia coli bacteria. Because of their ability to sense; catalyze under light; and destroy microbes; the metal-containing organic crystal composites constitute potential multi-functional materials for various environmental monitoring and remediation applications; including antibacterial applications.
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