| Summary: | In this paper, broad-spectrum light-harvesting silver-selenium (Ag2Se) nanoparticles with an average size of about 1 μm were synthesized by a one-pot microwave-assisted method, and the sample particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible, laser particle size analyzer and photothermal conversion. The results showed that the higher the concentration of the sample aqueous solution, the stronger the photothermal conversion ability under the same laser power, and the temperature of the sample aqueous solution with the concentration of 0.085 mol/L could reach 54.1 ℃. Under the same conditions, the higher the laser power, the stronger the photothermal conversion ability, and the temperature of the sample aqueous solution can reach 60.2 ℃. In addition, the experimental and theoretical results also show that the sample aqueous solution has good absorption ability in the UV–Vis-NIR absorption spectrum, which proves that the Ag2Se nanoparticles have good photothermal conversion properties.
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