A general one-step approach for in situ decoration of MoS₂ nanosheets with inorganic nanoparticles

Abstract

Two dimensional MoS 2 nanosheets decorated with inorganic nanoparticles (INPs) are emerging as novel MoS 2 -based nanohybrids for tuning the intrinsic attributes of both components for fundamental research and technological applications. However, the design and fabrication of MoS 2 -INP nanohybrids with a tailor-made structure and functions remain a significant challenge. Herein we report a general and controllable protocol for the one-step synthesis of various MoS 2 -INP nanohybrids by employing carboxylic MoS 2 (MoS 2 -COOH) nanosheets as a versatile support. The obtained MoS 2 -INP nanohybrids exhibit good dispersibility, high reactivity and excellent processability. The size, morphology and coverage density of INPs on the surface of MoS 2 -COOH can be readily controlled by tuning the feed ratio. Control experiments reveal that the presence of carboxylic functional groups plays a key role in controlling the structure and properties of the resulting MoS 2 -INP nanohybrids. In addition, ternary MoS 2 -based nanohybrids can also be readily prepared by this approach, as exemplified by the synthesis of MoS 2 -Fe 3 O 4 /Pt nanohybrids, which simultaneously exhibit excellent catalytic performance toward the reduction of 4-nitrophenol and favorable magnetic separation capability. Considering the simple fabrication process, high controllability of this protocol and excellent performance of the product, the present work opens up enormous opportunities for the large-scale production of diverse MoS 2 -based nanohybrids for many technological applications.

Functionalization of Two‐Dimensional Transition‐Metal Dichalcogenides

“…[37] They coupled 1-mercaptopropionic acid, 1-thioglycerol, and L-cysteine to ce-1T-MoS 2 by reacting…”

Nanocomposites of Two-Dimensional Molybdenum and Tungsten Dichalcogenides with Metal Particles: Preparation and Prospects for Application

“…Cheng et al [113] showed that the three-component composite consisting of MoS 2 , Fe 3 O 4 , and platinum NP displays greater activity in the reduction of 4-nitrophenol to give 4-aminophenol by the action of NaBH 4 than reported platinum-containing catalysts. Furthermore, this catalyst is readily separated by magnetic separation and may be used for at least 10 subsequent cycles without significant loss of catalytic activity.…”

“…Zhou et al [112,113] proposed an original approach to overcome this drawback and showed that ultrasonic treatment of lithium-intercalated MoS 2 during chemical exfoliation in solutions containing a thiol-substituted compound (in particular, mercaptopropionic acid) leads to the formation of sheets of dichalcogenide covalently functionalized with carboxyl groups (MoS 2 -CO 2 H). The density of the semiconductor surface coating by such groups may be adjusted by varying the preparation conditions, in particular, the amount of structural defects in the nanosheets.…”

“…The range of applications of this approach is not limited only to metal NP but may be extended to other NP such as Fe 3 O 4 . Subsequent chemical reduction of the metals on such composites opens a pathway for the preparation of three-component hybrids as illustrated by the preparation of a composite containing MoS 2 , Fe 3 O 4 , and platinum [113]. A similar approach to the precipitation of metal NP by chemical reduction was used to prepare a three-component hybrid, Pt-MoS 2 -ZIF-8, which has core-shell structure and is derived from a composite of molybdenum disulfide with an imidazole metal-organic framework ZIF-8 [107].…”

Ultrathin Coating of Confined Pt Nanocatalysts by Atomic Layer Deposition for Enhanced Catalytic Performance in Hydrogenation Reactions

“…The apparent kinetic rate constant (k app )i sp roportionalt ot he total reactive sites of the catalyst, which can be estimated based on the regression of the slope from the logarithm plot (ÀdC t /dt = k app C t ). [11] As listed in Ta ble1,t he k app value is 7.2 10 À3 s À1 for 2Al-Pt-inANTs, approximately four-fold highert han that of Pt-in-ANTs (1.7 10 À3 s…”