High‐Yield Exfoliation of Ultrathin 2D Ni₃Cr₂P₂S₉ and Ni₃Cr₂P₂Se₉ Nanosheets

Abstract

Multinary layered 2D nanomaterials can exhibit distinct physicochemical properties and innovative applications as compared to binary 2D nanomaterials due to their unique crystal structures. However, it still remains a challenge for the high‐yield preparation of high‐quality multinary 2D nanosheets. Here, the high‐yield and large‐scale production of two quaternary metal thiophosphate nanosheets are reported, i.e., Ni3Cr2P2S9 and Ni3Cr2P2Se9, via the liquid exfoliation of their layered bulk crystals. The exfoliated single‐crystalline Ni3Cr2P2S9 nanosheets, with a lateral size ranging from a few hundred nanometers to a few micrometers and thickness of 1.4 ± 0.2 nm, can be easily used to prepare flexible thin films via a simple vacuum filtration process. As a proof‐of‐concept application, the fabricated thin film is used as a supercapacitor electrode with good specific capacitance. These high‐yield, large‐scale, solution‐processable quaternary metal thiophosphate nanosheets could also be promising in other applications like biosensors, cancer therapies, and flexible electronics.

Recent advances in wearable self-powered energy systems based on flexible energy storage devices integrated with flexible solar cells

“…70 Different from EDLCs, these electrochemically active materials can offer pseudocapacitance through reversible electrochemical reactions, which endows the asymmetric SCs with a higher capacitance and energy density. [71][72][73] As illustrated in Fig. 7a, Xiong et al fabricated a exible ASC based on active carbon and core-shell structured peptide-Co 9 S 8 nanobricks.…”

Facile High-Yield Growth of One-Dimensional van der Waals Ta2Pd3Se8 via Chemical Vapor Transport Using PdCl2 as a Transport Agent

“…8−10 A significant advantage of CVT is the typical use of solid-phase precursors in the reaction system, facilitating a relatively easy control of the stoichiometry of the targeted materials. For instance, numerous entities, including single element (black phosphorus) 11,12 and binary (MoS 2 , PtSe 2 , WTe 2 , and CrI 3 ), 13−16 ternary (NiPS 3 , Ta 2 NiSe 5 , Nb 4 P 2 S 21 , and PdPSe), 17−21 and quaternary (Pb 2 BiS 2 I 3 and Ni 3 Cr 2 P 2 S 9 ) 22,23 compounds, can be grown through the precise compositional control of precursors. However, the long duration and low yield of synthesis are significant limitations of the CVT method.…”

“…Specifically, the CVT method has been extensively applied in the past decades to synthesize pure inorganic bulk materials, including two-dimensional (2D) and one-dimensional (1D) substances, as the starting materials for the top–down synthesis. − A significant advantage of CVT is the typical use of solid-phase precursors in the reaction system, facilitating a relatively easy control of the stoichiometry of the targeted materials. For instance, numerous entities, including single element (black phosphorus) , and binary (MoS 2 , PtSe 2 , WTe 2 , and CrI 3 ), − ternary (NiPS 3 , Ta 2 NiSe 5 , Nb 4 P 2 S 21 , and PdPSe), − and quaternary (Pb 2 BiS 2 I 3 and Ni 3 Cr 2 P 2 S 9 ) , compounds, can be grown through the precise compositional control of precursors. However, the long duration and low yield of synthesis are significant limitations of the CVT method. , Therefore, studies for achieving higher yields and better crystal quality within a shorter synthesis duration by controlling the parameters affecting the CVT process are essential.…”

Two-dimensional nanomaterials: synthesis and applications in photothermal catalysis

“…19–23 Various synthesis methods have been devoted to acquiring 2D nanomaterials, including mechanical exfoliation, liquid exfoliation, chemical vapor deposition (CVD), and wet chemical strategy. 24–26 Therefore, the family of 2D nanomaterials has been dramatically enriched, including single-element 2D-xenes (graphene, silicene, germanene, stanene, phosphorene, tellurene, bismuthine, borophene), 27,28 transition metal dichalcogenides (TMDs), 29 hexagonal boron nitride (h-BN), 30 covalent organic frameworks (COFs), 31 transition metal oxides (TMOs), 32 black phosphorus (BP), 33 transition metal carbides, nitrides and carbonitrides (MXenes), 34 metal–organic frameworks (MOFs), 35 layered double metal hydroxides (LDHs), 36 and two-dimensional metals nanosheets 37 (Fig. 1c).…”