Design of eco‐synthesized nanocomposites (PVA/TiO₂) for promising agents in germicidal and photodecomposition behaviors

In recent decades, there has been a significant surge in enthusiasm surrounding the topic of nanotechnology due to the rapid progress of innovation. The enhanced benefits exhibited by nanoparticles (NPs) in comparison to micro‐materials provide a diverse array of applications. Sustainable synthesis is a very efficient technique for producing nanomaterials using a simple, rapid, and eco‐friendly approach. In this investigation, titanium dioxide (TiO 2 ) NPs were produced by combining the residue of coffee extract with PVA/TiO 2 as an anchor material. The use of PVA/TiO 2 substrates was employed to enhance the surface area of TiO 2 NPs to enhance their characteristics. The TiO 2 NPs/PVA nanocomposites (NCs) were characterized using procedures. The TiO 2 /PVA NCs exhibited an absorbance peak at 319 nm in the ultraviolet–visible spectrum, and the particle size was calculated to be 19.2 nm based on the data obtained from FE‐SEM and x‐ray diffraction analysis. Furthermore, an investigation was conducted to examine the photodecomposition and germicidal properties of the TiO 2 /PVA NCs. The TiO 2 /PVA NCs showed remarkable germicidal efficacy against Staphylococcus aureus , Bacillus subtilis , Escherichia coli , and Pseudomonas aeruginosa . The investigation focused on examining the photodecomposition performance of the TiO 2 /PVA NCs in the presence of methylene blue (MB). The MB dye exhibited the greatest photocatalytic activity, reaching 89% within 70 min. Hence, the findings of this study indicate that the TiO 2 /PVA NCs have promising characteristics for use as both germicidal and photodecomposition properties.