Impact of structure, doping and defect-engineering in 2D materials on CO₂ capture and conversion

Abstract

The investigations on anthropogenic carbon dioxide (CO2) capture and conversion have a vital role in eradicating the global warming and energy crisis. In this context, defect- engineered two-dimensional (2D) nanomaterials...

A review of boron nitride-based photocatalysts for carbon dioxide reduction

“…271 In this regard, defects such as substitution and dopants, vacancies, edges and wrinkles, voids, and nally grain boundaries, detected for 2D materials, can be applied for BN as well. 136,272 The defects that can be created due to porosity development (voids) or by altering the crystalline structure via substitution (doping) were previously discussed in detail. Herein, another type of defect, especially vacancies, is discussed.…”

“…In addition to CO 2 adsorption, defects across BN nanomaterials can improve optoelectronic properties (lightharvesting absorption) and align photoinduced charge carriers into the photoreduction sites, inhibiting their recombination. 272 Moreover, the defect-laden or defect-induced adatoms can increase the specic surface area accompanied by the lattice distortions of the 2D host molecules, resulting in a higher photocatalytic yield. [281][282][283] Despite all of the previous studies carried out on BN defects, there is a lack of comprehensive research on the photophysical properties of vacancy defects.…”

DFT-Based Study for the Enhancement of CO2 Adsorption on Metal-Doped Nitrogen-Enriched Polytriazines

“…Recently, researchers have been turning their attention to two-dimensional (2D) materials such as molybdenum disulfides, graphynes, covalent organic frameworks, borophenes, and carbon nitrides . These materials have attracted attention due to their exceptional mechanical and thermal properties, tunable band structures, and ultrahigh specific surface areas, which make them potential CO 2 capture candidates. In fact, recent studies reveal that graphenes and carbon nitrides have remarkable CO 2 capture capacities.…”

Enhanced Charge-Modulated Switchable CO2 Capture on Graphene-like BeN4 with Beryllium Vacancy

“…The dramatic rise in human-emitted greenhouse gases, for which carbon dioxide (CO 2 ) is the most worrying anthropogenic air pollutant, has induced the urge to discover more viable atomic-scale gas-adsorbent materials (GAMs). − Thermo-mechanical and chemical stability, large specific surface area, tunable adsorption capacity, and cost-effectiveness are the main characteristics of an ideal material for CO 2 capture, separation, storage, and energy conversion. − Although a significant number of materials have been proposed for carbon capture, the development of a suitable sorbent material to ensure highly efficient and reversible CO 2 adsorption is still a major challenge. Emerging popular physical adsorption solid materials contain porous structures such as carbon-based composites, zeolites, metal-organic frameworks (MOFs) and covalent-organic frameworks (COFs), , and low-dimensional materials (LDMs), including pristine and surface-engineered membranes, single- and multi-layer sheets − and conjugated polymers, and amine-functionalized CO 2 adsorbents . However, due to the large adsorption energy, many currently introduced adsorbents have the drawback of high energy requirements for regeneration/release of CO 2 when required for subsequent utilization or sequestration.…”