A short review of titania-graphene oxide based composites as a photocatalysts

Abstract

New and effective methods of water purification are necessary to minimize pollution. Many methods have been used in wastewater treatment, but sorption is considered as an easy and economic process. The efficiency of any sorption process mainly depends on the physicochemical properties of the used adsorbent. Since photocatalysts can initiate reactions of decomposition organic contaminants under ultraviolet or sunlight irradiation without using chemicals or producing chemical wastes, photocatalytic reactions are considered a sustainable way to remove a variety of environmental pollutants. Ultraviolet water purification became the most effective method of water disinfection and purification. Heterogeneous semiconductor photocatalysts have recently emerged as an efficient material for purifying water. The crystal structure is crucial for photocatalytic activity and efficiency of semiconductors, thus optimal parameters must be provided during the preparation of photocatalysts. To overcome problems with semiconductors usage, the use of co-catalysts and photocatalyst carriers is one of the solutions. Recently, much emphasis has been placed on using graphene oxide (GO) supported semiconductor photocatalysts. In this paper, a short review of composites of titanium dioxide and graphene oxide-based materials is given.

Three-Dimensional Graphene–TiO2–SnO2 Ternary Nanocomposites for High-Performance Asymmetric Supercapacitors

“…This might be due to the amount of 3DG. Based on the literature, 30 by increasing the amount of graphene materials, the surface area of the nanocomposite will be further increased. The 3DG–SnO 2 –TiO 2 ternary nanocomposite has a smaller pore size of 17.24 nm than the SnO 2 –TiO 2 nanocomposite (21 nm).…”

A Review on the Progress and Future of TiO2/Graphene Photocatalysts

“…Graphene-based TiO 2 composites have emerged as efficient photocatalysts [1,6,[182][183][184][185][186] for the next generation photocatalytic applications [1,105,[187][188][189][190][191][192]. The synergistic effect between components in ternary photocatalysts (comprising three components, where each photocatalyst component plays its potential role to maximize the photocatalytic activity) offers significant merits, such as multiple interfaces, improved separation and migration/transfer of charges, reduced recombination of photogenerated charge carriers, prevented agglomeration, high specific area and high stability [193].…”