Formaldehyde, as one of the main indoor air pollutants, poses a significant threat to human health. Therefore, to effectively reduce indoor formaldehyde pollution, we prepare a novel silver carbonate (Ag 2 CO 3 )/amorphous silver silicates (a-AgSiO)/g-C 3 N 4 nanosheets (CNNS) composite catalyst using in-situ precipitation and ion exchange methods. The Ag 2 CO 3 /a-AgSiO/CNNS composite was characterized by various methods, including XRD, FT-IR, and XPS. Compared to the a-AgSiO/CNNS composite, the formaldehyde degradation efficiency of the Ag 2 CO 3 /a-AgSiO/CNNS composite is significantly enhanced, reaching up to 81.9% under the same conditions. Cycling stability tests also demonstrated the excellent chemical stability of the Ag 2 CO 3 /a-AgSiO/CNNS composite, with a formaldehyde degradation efficiency of 72.6% after five cycles. By investigating the mechanism of Ag 2 CO 3 /a-AgSiO/CNNS composite, we found that the formation of double Z-type heterogeneous structure in the Ag 2 CO 3 /a-AgSiO/CNNS composite enhanced the separation efficiency of photoinduced charge carriers and improved the photocatalytic activity. In conclusion, the prepared Ag 2 CO 3 /a-AgSiO/CNNS composite catalyst with excellent photocatalytic performance can be used for the efficient degradation of indoor formaldehyde.
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Pan et al. (2024) studied this question.
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