Functionalized Hybridization of 2D Nanomaterials

Abstract

The discovery of graphene and subsequent verification of its unique properties have aroused great research interest to exploit diversified graphene‐analogous 2D nanomaterials with fascinating physicochemical properties. Through either physical or chemical doping, linkage, adsorption, and hybridization with other functional species into or onto them, more novel/improved properties are readily created to extend/expand their functionalities and further achieve great performance. Here, various functionalized hybridizations by using different types of 2D nanomaterials are overviewed systematically with emphasis on their interaction formats (e.g., in‐plane or inter plane), synergistic properties, and enhanced applications. As the most intensely investigated 2D materials in the post‐graphene era, transition metal dichalcogenide nanosheets are comprehensively investigated through their element doping, physical/chemical functionalization, and nanohybridization. Meanwhile, representative hybrids with more types of nanosheets are also presented to understand their unique surface structures and address the special requirements for better applications. More excitingly, the van der Waals heterostructures of diverse 2D materials are specifically summarized to add more functionality or flexibility into 2D material systems. Finally, the current research status and faced challenges are discussed properly and several perspectives are elaborately given to accelerate the rational fabrication of varied and talented 2D hybrids.

Electrode Materials for Supercapacitors: A Review of Recent Advances

“…There are some common modification techniques to enlarge the surface area, which lead to enhancing the charge storage ability of the electrode materials, thus improving the properties of 2D materials. These techniques can be categorized into several groups including alloying [427], hybridization [428] intercalation [429], nanosizing, the top-down method [430], vertical/lateral heterojunctions [431], external field modification [432], strain engineering [433], and stacking order of the atomic layers [434].…”

“…Furthermore, to obtain a high power/energy density SC device, the advance electrode materials are required to provide desirable properties depending upon the specific application. There are various approaches to improving the electrochemical properties of the "old" pseudocapacitive material such as MnO2 and RuOx to obtain the "advanced" pseudocapacitive material such as TMDs (such as MoS2, etc.,) and MOFs [426,444] For example, the functionalized of hybridization of 2D-TMDs with various carbon-based supporting materials to increase more active sites, and ease the charge transferability has been reported in several studies [418,[445][446][447], (Figure 23) [428]. Recently, a COF complex was prepared as electrode material for flexible and extensible SCs using a template of hydroxyl-ended hyperbranched polymer (OHP) through a simple solid-state mechanical mixing process.…”

“…Functionalized hybridization of different 2D-materials through diverse strategies to combine various types of materials. Reprinted with permission from[428], Copyright 2019, Wiley-VCH.…”

Research progress of TiO2 photocathodic protection to metals in marine environment

“…However, to improve the photocathodic protection performance, a wider range of new materials and new technologies should be investigated. For example, MXenes and MOFs can be constructed into 2D nanosheets (Guan and Han, 2019), and physical vapor deposition and chemical vapor deposition (Muratore et al, 2019) can also be used. Combining photocathodic protection with sacrifi cial anode protection or new energy harvesting technology, such as triboelectric nanogenerators, can harvest wave energy (Feng et al, 2016) and mechanical energy (Yang et al, 2020) and provide more eff ective protection for metals.…”

Nanocomposite Membranes for Liquid and Gas Separations from the Perspective of Nanostructure Dimensions

“…There have been growing interest in the functionalization of 2D materials. The 2D nanochannels of sheet-like nanostructures can be easily decorated or intercalated with other functional materials to tune their physicochemical properties, impart additional functionalities or flexibility of the nanochannels to expand their application and achieve greater performances [ 68 , 69 ]. The interlayer composition enables structural control within the layers, where the ion or molecule selectivity and stability can be enhanced accordingly [ 70 ].…”