Photocatalytic performance of aerogels for organic dyes removal from wastewaters: Review study

Nowadays, present various pollutants such as organic pollutants, heavy metal ions, bacteria and etc. in water resources cause's serious problems on human health, animals and the environment. Among the water pollutants, dyes are an important class of pollutants discharged into wastewaters from textile, dyeing and other industrials processes. Currently, removal of these dye pollutants from water sources are vital and important due to the toxicity impact of the dyes for humans healthy, animals and plants. In this review paper, for the first time we summarizes and highlights recent literature information about dyes and theirs removal methods, photodegradation kinetics, photocatalytic degradation of dyes from aqueous pollutants and wastewater/water by different type of photocatalysts with three dimensional (3D) porous structure (e.g. aerogels, xerogel, cryogel. etc.). In additional, in this review article, the influence of various parameters such as pH solution, cakination temperature, dye initial concentration, electron scavenger, photocatalyst dosage on the photoactivites degradation process of dyes were investigated. Based on this review, it is found that aerogels based on carbons (such as Graphene, Graphene Oxide) have been more considered by the researchers due to their efficiency on dye removal. (C) 2020 Elsevier B.V. All rights reserved.