Abstract

This study investigates the synthesis and characterization of Ag/Mn-TiO₂ composites, which exhibit enhanced antibacterial activity under visible light due to the doping of silver (Ag) and manganese (Mn) into titanium dioxide (TiO₂). The synthesized Ag/Mn-TiO₂ composites are analyzed using X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy to confirm their structural and chemical properties. The results reveal that metallic Ag is distributed on the surface of TiO₂, whereas Mn ions are integrated into the TiO₂ lattice. Antibacterial and antifungal activities are evaluated against Escherichia coli and Aspergillus niger, respectively, demonstrating significant inhibition (99.9% reduction) under visible light. In addition, the successful incorporation of Ag/Mn-TiO₂ composites into silicone foam results in excellent antibacterial (99.9% reduction) and antifungal (complete inhibition) effects. The findings suggest that Ag/Mn-TiO₂ composites are effective materials for enhancing microbial resistance in indoor environments, highlighting their potential for promoting cleaner and healthier indoor spaces.

Keywords: Ag/Mn-TiO2 composites;visible light;antibacterial performances;antifungal performances;silicone foam