A review on floating nanocomposite photocatalyst: Fabrication and applications for wastewater treatment

A review on the potential of photocatalysis in combatting SARS-CoV-2 in wastewater

“…The phenomenon mentioned above occurs due to a process known as photocatalytic oxidation and reduction [ 60 ]. The photocatalytic process involves three main stages: (1) formation of photoinduced charge carrier, (2) separation of charge carrier and distribution to the surface of the photocatalyst, and (3) oxidation and reduction reaction on the surface of the photocatalyst [ 13 ].…”

“…To address the above challenges, immobilising the photocatalyst into porous or floating substrate could solve the recovery and agglomeration issues of the suspended photocatalysts in the aqueous system [ 13 , 67 , 92 ]. The porous substrate could be an organic or inorganic membrane leading to the development of a bifunctional photocatalytic membrane that acts as a filter and photocatalyst in the same chamber.…”

“…To curb and alleviate infectious drinking water, water purification technologies have advanced significantly in the last century [ [12] , [13] , [14] , [15] , [16] ]. The number of waterborne diseases outbreaks, including cholera and typhoid, has declined because of drinking water disinfection.…”

Ultrasound for the remediation of contaminated waters with persistent organic pollutants: A short review

“…The amount of residues launched in the aquatic environment has significantly increased in the last decades [1] . The textile industry, domestic sewage, and agribusiness are the sectors that have most contributed to water pollution [2] , [3] .…”

Floating Photocatalysts for Effluent Refinement Based on Stable Pickering Cellulose Foams and Graphitic Carbon Nitride (g-C3N4)

“… 11 − 15 Most floating carriers have been developed for other photocatalysts, in particular TiO 2 . 16 An optimal carrier should enable facile photocatalyst immobilization, possess adequate photocatalyst–carrier compatibility so that the photocatalyst remains with the carrier throughout its use, be stable, potentially transmit a large portion of the light, and possess long floatation times. Simultaneously, it should not release toxic pollutants, e.g., plastic pollution in the case of plastic carriers, be easily recovered, and preferably have additional properties, such as high uptake of dye molecules and high diffusivity of these in the material (when the photocatalyst is embedded in the interior of the carrier) to ensure rapid photodegradation of pollutants.…”