Simultaneous removal of bacteria and volatile organic compounds on Cu2O-NPs decorated TiO2 nanotubes: Competition effect and kinetic studies

Abstract

Preparation and characterization of Cu2O-NPs decorated TiO2 nanotubes.  Cu2O-NPs/TiO2-NTs has greatest photocatalytic performance under UV-Visible light irradiation.  Simultaneous removal of E. coli and Butane-2, 3-Dione (BUT) was studied.  Mechanism of the photocatalytic activities is suggested.

Innovative photocatalytic reactor for the degradation of VOCs and microorganism under simulated indoor air conditions: Cu-Ag/TiO2-based optical fibers at a pilot scale

“…Bacterial inactivation was negligible around 0.013 CFU (i) and < 0.01 CFU (ii). We observed, in our previous work [52], a similar trend of bacterial removal efficiency in a batch reactor.…”

Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis

“…The studies referenced in Figure S2 as well as the current work investigate the disinfection kinetics in isolation, as they study the inactivation rates of E. coli in absence of any other contaminants in the water. The photocatalytic disinfection of water from actual ground and surface water sources, as well as wastewater, needs consideration of the effects of total organic carbon (TOC) and the presence of various salts in the water as reported by Abidi et al [39], Moncayo-Lasso et al [40] and Birben et al [41]. However, such studies need to be performed on a larger scale to better understand the challenges of scaling up the photocatalytic disinfection process.…”

Effect of the electrolyte chemical nature on the formation and characteristics of TiO2 nanotubes synthesized by anodic oxidation using a Ti cathode

“…TiO 2 is a relatively abundant semiconductor material. Due to its excellent properties such as low toxicity, excellent stability to corrosion, and good chemical and biological stability, TiO 2 is used in the fabrication of solar and fuel cells, paints, cosmetics, inks printing, ceramics, textiles, pavements coverings, energy storage devices, hydrogen production, biomedical applications, and as a photocatalyst for water and air purification, metal oxidation, and inactivation of viruses and pathogenic microorganisms [1][2][3][4][5][6][7][8][9]. Nanostructured TiO 2 can be prepared in the form of a powder or thin films, produced using a variety of techniques such as thermal oxidation, spraying, chemical or physical deposition in the vapor phase, sol-gel, solvo-thermal processes, inverse micellar, and hydrothermal [7,[10][11][12][13][14].…”

“…Alternatively, the TiO 2 nanostructures that present characteristics such as biocompatibility, photocatalytic activity and superhydrophilicity have been found to offer great potential in biomedical applications, and photoelectrochemical and photocatalytic processes [8,9,21,24,29,[33][34][35][36][37][38]. In this regard, the advantage of TNT over other nanostructures such as nanoparticles, nanowires, nanobars, and nanofibers is the area provided by their internal and external surfaces.…”

“…In addition, for this work, the electrolytes were reused several times, a question that has not been addressed elsewhere in the literature. The application of TNT as a photocatalyst for removing highly pathogenic viruses and emerging pollutants from drinking water [6,8,47] suggests that reducing costs for its production is an important goal in the environmental sciences. As such, in the current work, the exploration of material reuse to minimize chemical wastes and their impacts during the synthesis process may allow for a lower cost method that obtains the same, or even better, characteristics than traditional synthesizing methods.…”