研究目的
Investigating the photocatalytic efficiency of TiO2-based and Ag-doped TiO2-based porcelain grés ceramic tiles for indoor depollution and bacteria reduction under LED light.
研究成果
The study demonstrated that Ag-TiO2 coated porcelain grés tiles exhibit superior photocatalytic and antibacterial properties under LED light compared to TiO2 alone, suggesting their potential as self-cleaning materials for indoor environments.
研究不足
The study focuses on the use of LED light for photocatalytic activation, which may limit the applicability under other light sources. The environmental and health impacts of Ag nanoparticles, despite their benefits, were not deeply explored.
1：Experimental Design and Method Selection:
The study involved the preparation and characterization of TiO2 and Ag-TiO2 coated porcelain grés tiles using a digital printing process. The photocatalytic efficiency was tested under LED light for NOx and ethanol degradation, and antibacterial activity was assessed against E. coli and S. aureus.
2：Sample Selection and Data Sources:
Commercial TiO2 sample (1077 by Kronos) and industrial porcelain grés tiles were used. AgNPs were prepared from an AgNO3 solution and supported on TiO2 by wet-impregnation.
3：List of Experimental Equipment and Materials:
Included a sorptometer for surface area measurement, X-ray diffractometer, TEM, UV–vis spectrophotometer, SEM, and EDX for characterization, and a batch reactor for photocatalytic tests.
4：Experimental Procedures and Operational Workflow:
Tiles were cleaned, coated with TiO2 or Ag-TiO2 via digital printing, fired, and tested for photocatalytic activity and antibacterial properties under LED and UV light.
5：Data Analysis Methods:
Photocatalytic degradation efficiency was measured by chemiluminescence for NOx and micro-GC for ethanol. Antibacterial activity was assessed following ISO 27447:2009.
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