Microorganisms Photocatalytic Inactivation on Ag3PO4 Sub-Microcrystals Under WLEDs Light Source

In this article, we report the silver orthophosphate (Ag3PO4) photocatalytic inactivation properties on strains Gram-positive Saprophyte B. subtilis, a diploid fungus Candida albicans and Gram-negative Pseudomonas aeruginosa, using as irradiation source white-light-emitting diodes (WLEDs) with luminous flux (? v) of 1.3 × 103 Lumens relative power density 15 mW m?2. Microorganisms death curves kinetic constants (Kd) indicated that inhibitory effect Ag3PO4 under WLEDs is well pronounced to C. (6.6 10–2 min?1) in relation P. augenosas (4.6 subitilis (2.5 min?1). Decimal reduction time (Dt) were 34.4 min albicans, 50.1 92.1 B.subitilis. The micrographs obtained by scanning electron microscopy field emission gun (SEM-FEG) demonstrated there was cell wall permeability consequently total rupture suggesting lipid peroxidation phenomenon protein oxidation promoted presence reactive oxygen species (ROS). Furthermore, it observed when irradiated demonstrates important sporicidal activity related promoting endospore rupture.