2D Materials Decorated with Ultrathin and Porous Graphene Oxide for High Stability and Selective Surface Activity

Abstract

2D black phosphorus (BP) and MXenes have triggered enormous research interest in catalysis, energy storage, and chemical sensing. Unfortunately, the low stability of these materials under practical operating conditions remains a critical bottleneck, particularly as they are prone to oxidization under moisture. In this work, the design and application of stable 2D heterostructures obtained from decorating BP and MXene (Ti3C2Tx) with few‐layer holey graphene oxide (FHGO) membranes are presented. In the resulting heterostructured systems, FHGO serves as a multifunctional passivation layer that shields BP or MXene from oxidative degradation, while allowing the selective diffusion of target gas molecules through its micropores and toward the underlying 2D material. Through a case study of dilute NO2 sensing, it is demonstrated that these heterostructures show a greatly enhanced sensing performance under humid conditions, where fast sensing speed and response are consistently observed, and high stability is impressively retained upon repetitive sensing cycles for 1000 min. These results corroborate the efficacy of material decoration with porous FHGO membranes and suggest that this is a generalizable strategy for reliable high‐performance applications of 2D materials.

Bridged Ti3C2TX MXene Film with Superior Oxidation Resistance and Structural Stability for High-Performance Flexible Supercapacitors

“…For example, the methods of argon cryogenic storage, storage in the organic solvent, , and edge-capping − were adopted to mitigate oxidation of Ti 3 C 2 T X flakes. Surface coatings composed of carbon, , conductive polymers, , rGO, , polydopamine, and silicone as the physical barrier were used to stabilize Ti 3 C 2 T X -based assembly. The thermally annealing processing under hydrogen or inert argon gas was used to prepare the dense or sintered Ti 3 C 2 T X films with excellent oxidation resistance.…”

2D/2D Heterostructures: Rational Design for Advanced Batteries and Electrocatalysis

“…[ 43 ] In addition, recent study has revealed that the presence of few‐layer holey graphene oxide (FHGO) in 2D‐based BP/MXene heterostructure membranes can passivate undesired oxidative degradation behaviors of BP or MXene layers and meanwhile achieve the selective molecular diffusion, which will bring some new properties into the 2D‐2D heterostructures and widen their applications. [ 129 ]…”

Mechanical and thermal characterizations of nanoporous two-dimensional boron nitride membranes

“…Since the discovery of graphene in 2004 1 , its intriguing features have piqued the interest of researchers all over the globe in other two-dimensional (2D) nanomaterials for a variety of applications. Porous 2D materials with changeable pore shape and size have attracted a lot of attention because of their potential uses in a variety of applications, including photocatalysis, electrocatalysis, biomaterials science, energy generation, storage 2 – 4 . Porous materials may interact with a variety of active species both within their porous frameworks and on their surface, but only if these substances fit the pore size of porous materials, which is crucial for gas storage, separation, adsorption, and heterogeneous catalysis 5 , 6 .…”