Nanoparticles (NPs) exist in atmosphere, ores, rocks, ocean, hydrothermal vents, river, and wastewater. The presentation will first summarize the examples of presence of different nanoparticles and their oxides/sulfides forms in different compartments of aquatic environment. The focus of the presentation will be on silver and ither metal bimetallic nanoparticles to demonstrate their formation under different environmental conditions such as temperature, pH, and source of natural organic matters (NOMs). The influence of natural sunlight and types of NOMs (e.g., fulvic acid and humic acid) will also be discussed. Approaches used in elucidating the mechanism of the formation of bimetallic under different conditions (i.e., thermal and light irradiation will be discussed. Formed silver-gold nanoparticles from NOMs are highly stable up to several months.

Mechanism of formation and stability of bimetallic nanoparticles in aquatic environment

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ACS Fall 2022

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