Graphene Oxide and its Derivatives for Gas Separation Membranes

Abstract

Graphene oxide (GO), a derivative of graphene with a hydrophilic 2D crystalline nanostructure and being an exfoliated form of graphite, is designed with several oxygen-functional groups. Due to its characteristics it has attracted much interest for applications for gas separation membranes. This review focuses on GO-containing membranes for gas separation. A basic look at gas separation membranes is presented, and the properties of graphene, GO, reduced GO (RGO) as well as their preparation approaches are covered. Different methods for fabrication of GO membranes in the style of mixedmatrix membranes, thin-film composites, layered GO membranes etc. are investigated. The gas separation performance of fabricated GO membranes is evaluated, highlighting recent developments and prospectives. Finally, future trends of GO membranes are described.

2D Zeolite-Based Thin Film Nanocomposite Membranes for Efficient CO2 Separation

“…11 Commonly utilized inorganic fillers include zeolites, 11 metal−organic frameworks (MOFs), 11 covalent organic frameworks (COFs), 12 and graphene oxide (GO). 13 Zeolites are known for their high porosity, uniform pore structure, and exceptional thermal stability. At the same time, compared with MOF, it has lower price and it can be further functionalized to improve the separation performance, so it has been extensively researched.…”

“…The selection of inorganic fillers and polymer matrices significantly influences the separation efficiency . Commonly utilized inorganic fillers include zeolites, metal–organic frameworks (MOFs), covalent organic frameworks (COFs), and graphene oxide (GO) . Zeolites are known for their high porosity, uniform pore structure, and exceptional thermal stability.…”

Ameliorating Effects of Graphene Oxide on Cadmium Accumulation and Eco-Physiological Characteristics in a Greening Hyperaccumulator (Lonicera japonica Thunb.)

“…As a chemically modified graphene, GO contains a single-atom-thick two-dimensional sheet of carbon atoms [19,20]. GO carries large numbers of oxygen-containing functional groups such as alcohols, epoxides and carboxylic acids, and thus has exceptional structure characteristics, in which numerous hydrophobic sp (2) clusters are isolated within the hydrophilic sp(3) C-O matrix [21][22][23]. Because of those unique composite properties, GO has been widely applied to every respect of social life especially in the biomedical field such as drug delivery, biosensors, antibiotics, vaccine enhancers, photo-thermal therapy and cancer treatments [24][25][26][27][28][29].…”