One pot synthesis of Ti and O co-doped g-C₃N₄: a novel composite for efficient visible-light-driven photocatalytic inactivation of E. cloacae

Abstract

Co-doping is one of the most facile and efficient strategies for boosting the photocatalytic performance of g-C3N4. Herein, a series of Ti and O co-doped g-C3N4 (Ti/OCN) composites with excellent photocatalytic inactivation activity of Enterobacter cloacae (E. cloacae) were successfully synthesized by simple calcination of urea/formic acid/TiCl4 precursor. The obtained Ti/OCN-3 possessed the optimal photocatalytic capability with complete inactivation of 6.20 log CFU·ml−1 E. cloacae under 60 min of visible light irradiation. The improved photocatalytic disinfection performance was probably attributed to the synergistic effect of Ti and O co-doping, which led to an extended visible light response and accelerated charge transport efficiency. Furthermore, scavenger trapping and electron spin resonance (ESR) experiments revealed that ·O2 −, h+ and ·OH were responsible for the enhanced inactivation activity. Overall, this research provided a promising strategy for fabricating g-C3N4-based catalysts to efficiently deal with the hazards of pathogenic microorganisms.

Ag2S nanoparticles anchored on P-doped g-C3N4: a novel 0D/2D p-n 2 heterojunction for superior photocatalytic inactivation of 3 multidrug-resistant E. coli

“…The frequent emergence of multidrug-resistant pathogenic bacteria, especially existed in hospital wastewater, posed a severe epidemical threat to human health [1,2]. Therefore, it was imperative to seek eco-friendly, lowcost and effective technologies for completely eliminating multidrug-resistant pathogenic bacteria [3,4]. Compared with conventional water purification methods, including chlorination, ozonation and UV irradiation, photocatalytic inactivation based on semiconductors has been widely accepted as one of the most promising alternative techniques due to its excellent photocatalytic activity, favorable reusability, nontoxic and stable inactivation properties [5][6][7].…”