Development of Silver-loaded Cerium Oxide Nanocomposites with High Efficiency Against Blue Light
In order to solve the defects of existing physical and chemical sunscreen materials that cannot shield short-wave blue light and to bring the application value of cerium oxide into play,silver-doped anti-blue-light composites Ag NPs@CeO2-PEI were prepared by simple chemical precipitation using polyethyleneimine as a template modifier.Characterization and performance investigations were carried out using ultraviolet-visible spectrophotometry(UV-Vis),scanning electron microscopy-energy spectroscopy(SEM,EDS),Fourier infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and antimicrobial tests.When the concentration of polyethyleneimine was 2.5%and the ratio of L-ascorbic acid to modified cerium oxide(CeO2-PEI)was 2.348%,the product showed the best resistance to short-wavelength blue light,with an average absorbance in the short-wavelength blue region as high as 1.57 at 0.2 mg·mL-1.And the bactericidal rate of Ag NPs@CeO2-PEI suspension containing 1.2%silver against Gram-positive bacteria was as high as 82.05%,and the bactericidal rate under the synergistic action of visible light was 100%.The results showed that silver-loaded cerium oxide nanocomposites based on polyethyleneimine were successfully developed,which had efficient anti-blue light and good antibacterial properties.
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