Fluorine-free strategy for hydroxylated Ti3C2/Ti3AlC2 catalysts with enhanced aerobic oxidative desulfurization and mechanism

Two-dimensional carbide/nitride (MXene) materials in thermal catalysis

“…Additionally, a kind of hydroxylated Ti 3 C 2 /Ti 3 AlC 2 (h-TC/ TAC) catalyst was prepared for the aerobic desulfurization of DBT. 44 The h-TC/TAC prepared in a 5 mol L À1 KOH etchant at 120 C for 24 h exhibited a desulfurization rate of up to 99% (Fig. 7d) and can be recycled eight times without signicant deactivation.…”

“…MXenes are an emerging group of materials in the eld of thermal catalysis (Table 1). Due to the high thermal stability 91,92 and unique structures, 44 MXenes show some advantages compared with traditional catalysts. Among the numerous kinds of MXenes, Ti 3 (C/N) 2 T x , Mo 2 CT x , and V 2 CT x have been intensively studied because of the relatively mature preparation process and the easy modication of their structures.…”

“…127 As for the function in facilitating the generation of free radical particles, the desulfurization reaction catalyzed by h-TC/TAC is a good example. 44,96 In this reaction, the -O and -OH termination groups produced in the alkaline selective etching can interact strongly with Ti to form Ti-O and Ti-OH structures, and in turn, these unique structures act as active centers to accelerate the oxygen molecular transformation into radicals. In situ electron spin resonance (ESR) spectroscopy revealed that the oxygen molecules were likely to be converted into cOH and cO 2 À radicals on these Ti-O and Ti-OH structures.…”

A general strategy to immobilize metal nanoparticles on MXene composite fabrics for enhanced sensing performance and endowed multifunctionality

“…1(g)). 46,47 Moreover, as shown in Fig. S12 (ESI †), the facile and strong adsorption of MXene nanosheets on the surface of the cellulose fibers could be promoted by hydrogen bonding between the abundant hydrophilic groups of MXene and cellulose.…”

Structures, properties, and challenges of emerging 2D materials in bioelectronics and biosensors

“…In addition, the fluorine‐containing etchant induces an abundance of F − on the surface of MXenes, which is challenging to conjugate via F − for biomolecules and requires further modification. Therefore, it has been reported that the synthesis of Ti 3 C 2 T x MXene can also be achieved through a series of alkaline‐induced removal of Al, 216 for instance, the NaOH/KOH‐assisted hydrothermal etching process 217 . However, the production of Ti 3 C 2 T x under successive NaOH treatment was still very low.…”