Effect of Temperature on the Adhesion and Bactericidal Activities of Ag+-Doped BiVO4 Ceramic Tiles

Abstract

The aim of this research was to study the effect of temperature on the adhesion and disinfection activities of an Ag+-doped BiVO4 (Ag+/BiVO4) coating. Ag+/BiVO4 was prepared by a sol–gel method, and spraying was used as the deposition method of coating. X-ray diffraction patterns showed that the monoclinic scheelite phase of the samples was unchanged by annealing at 450–650 °C. Scanning electron microscopy results showed that, at high temperatures, the particles melted and formed a dense coating, and the roughness of the coating decreased after initially increasing. The adhesion and disinfection activities were evaluated by ASTM D3359-08 and disinfection experiments. The results showed that the samples modified by silver had a good disinfection activity when annealed in the range of 450–650 °C. The adhesion increased upon increasing the annealing temperature. The sample annealed at 650 °C showed the best coating adhesion and completely killed Escherichia coli, Staphylococcus aureus, Shigella, and Salmonella after 2 h of visible-light irradiation.

Nanocomposites for Photocatalysis

“…Among the samples, that which was annealed at 650 • C demonstrated the highest coating adhesion. Furthermore, it effectively eliminated Escherichia coli, Staphylococcus aureus, Shigella, and Salmonella bacteria after just 2 h of visible-light irradiation [23,24].…”

“…Disinfection experiments were conducted to evaluate the antimicrobial properties of the samples. It was found that the silver-modified samples exhibited effective disinfection activity within the annealing temperature range of 450-650 • C [23].…”

Doping with Rare Earth Elements and Loading Cocatalysts to Improve the Solar Water Splitting Performance of BiVO4

“…BiVO 4 is also a metal oxide semiconductor material. Because it is composed of relatively abundant elements in the earth, it is an n-type semiconductor material with a band gap value of about 2.4 eV [26,27]. It has a band edge position suitable for oxygen evolution reaction (OER), which can effectively absorb visible light and become a potential photoanode material [28,29].…”