Application of 2D Materials for Adsorptive Removal of Air Pollutants

Abstract

Air pollution is on the priority list of global safety issues, with the concern of fatal environmental and public health deterioration. 2D materials are potential adsorbent materials for environmental decontamination, owing to their high surface area, manageable interlayer binding, large surface-to-volume ratio, specific binding capability, and chemical, thermal, and mechanistic stability. Specifically, graphene oxide and reduced graphene oxide have been attracting attention, taking advantage of their low cost synthesis, excessive oxygen containing surface functionalities, and intrinsic aqueous dispersibility, making them desirable for the development of cost-effective, high performance air filters. Many different material designs have been proposed to expand their filtration capability, including the functionalization and integration with other metals and metal oxides, which act not only as binding agents to the target pollutants but also as antimicrobial agents. This review highlights the advantages and drawbacks of 2D materials for air filtration and summarizes the interrelationships among various strategies and the resultant filtration performance in terms of structural engineering, morphology control, and material compositions. Finally, potential future directions are suggested toward the idealized designs of 2D material based air filters.

Ferromagnetic Elements in Two‐Dimensional Materials: 2D Magnets and Beyond

“…Materials of 2D and particularly metal oxides, are excellent candidates for adsorbing pollutants and dyes for water remediation due to the high specific surface area along with the large number of active sites they can provide for adsorption. [164,165] Most of the time, calcination has a positive effect on their properties, while different calcination temperatures give rise to structurally different materials with varying specific surface areas, hence modified adsorption performances. [166,167] Studies suggest that calcination can improve material properties, but high calcination temperatures can lead to unwanted results.…”

Design, synthesis, and application of some two-dimensional materials

“…Functional 2D materials have developed into a huge material system that perfectly combines the structural features of traditional 2D materials, the electronic properties of conjugated functional materials, the structural variety of organic molecules, and manipulation advantage of supramolecular assembly, which have shown implications for a wide scientic community. [67][68][69] Although extensive review articles have emerged to introduce the recent advancement of 2D materials, to the best of our knowledge, only an individual aspect is focused, such as the particular kind of structure or certain type of the device application. [70][71][72][73][74] At the current stage, the ordered growth of the precursor in the 2D direction is one of the key scientic problems in the construction of synthetic 2D materials.…”

Exploring the Self‐Cleaning Facets of Fluorinated Graphene Nanoarchitectonics: Progress and Perspectives

“…These materials offer unlimited potentials with tuneable electronic, catalytic and wetting properties. Importantly, 2D nanostructures offers platform to various materials towards the design of novel materials with multifaceted properties [30–32] . The usage of integrated graphene nanostructures towards liquid‐liquid separation, – philicity (hydrophobicity/hydrophilicity) engineering and durable super‐wetting coatings remain challenging.…”

“…Importantly, 2D nanostructures offers platform to various materials towards the design of novel materials with multifaceted properties. [30][31][32] The usage of integrated graphene nanostructures towards liquid-liquid separation, -philicity (hydrophobicity/hydrophilicity) engineering and durable super-wetting coatings remain challenging. Among the several derivatives of graphene, fluorinated graphene (FG) possessing majority of covalent CÀ F bonds, [33,34] has raised enormous interest due to its physiochemical properties, chemical functionalization, superhydrophobicity and lubrication.…”