Large-scale preparation of heterometallic chalcogenide MnSb₂S₄monolayer nanosheets with a high visible-light photocatalytic activity for H₂evolution

Abstract

Free standing MnSbS 2D monolayer nanosheets were developed by a simple calcination of the neutral hydrazine molecule bridged chalcogenide, and were found to display a highly efficient and stable activity for photocatalytic hydrogen evolution from water under visible light irradiation (420-730 nm).

Highly Efficient Photocatalyst Based on a CdS Quantum Dots/ZnO Nanosheets 0D/2D Heterojunction for Hydrogen Evolution from Water Splitting

“…Hydrogen is considered to be a new ecofriendly energy source because of its high combustion heat and clean combustion product. Hydrogen generation from photocatalytic water splitting has been widely explored as a promising technology to solve the global energy crisis and environmental pollution. − Many semiconductor materials have been utilized as photocatalysts to convert solar energy to hydrogen energy by water splitting, such as TiO 2 , − transition-metal sulfide, − carbon nitride, − ZnO, , and composite materials of these semiconductors. Among them, ZnO with a direct band gap of 3.2 eV is one of the most attractive semiconductor photocatalysts because of its high photosensitivity, nontoxic nature, low cost, and environmental sustainability. − However, the photocatalytic efficiency of ZnO is limited by several factors, such as restrictive light absorption [only ultraviolet (UV) light can be absorbed because of its wide band gap] and fast recombination of charge carriers. , Several strategies have been explored to improve these shortcomings for enhanced photocatalytic efficiency, such as ion doping, noble-metal deposition, and the construction of a heterojunction structure. − Among these strategies, coupling ZnO with other visible-light-responsive semiconductors to form a heterojunction structure has been proven to be highly effective.…”

MnSb2S4 Monolayer as an Anode Material for Metal-Ion Batteries

“…The discovery of graphene opened up possibilities for exploring new low-dimensional monolayer materials, such as transition-metal dichalcogenide, − phosphorene, − silicene, , h -BN, , and heterometallic chalcogenide monolayers . These low-dimensional materials have attracted great interest because of their distinctive electronic, optical, and catalytic properties.…”

“…These low-dimensional materials have attracted great interest because of their distinctive electronic, optical, and catalytic properties. We recently demonstrated excellent photocatalytic properties for MnSb 2 S 4 (MSS) monolayer nanosheets . This material has an advantage over graphene because its band gap is appropriate for solar applications and for possible use as a photocatalyst.…”

“…Recently, large-scale syntheses of MSS 2D monolayer nanosheets have been achieved by calcination of layered MSS chalcogenides with interlayer hydrazine bridges. The resulting MSS monolayer has good thermal stability; in particular it is stable even at the high temperature of 773 K …”

Recent Advancements and Future Prospects in Ultrathin 2D Semiconductor-Based Photocatalysts for Water Splitting

“…Except, the introduction of oxygen defects can also enhance the active sites since the MoS 2 phase is changed to the octahedral metallic one, giving rise to the acceleration of the hydrogen evolution process [142]. Up to now, for photocatalyst mechanisms, using various 2D TMDs monolayers has been explored with diverse metal ions, for example, binary W/Mo/SnX 2 [134,143,144], Cd/Ge/CoX [145,146], In 2 X 3 [58,147], ternary CdZnX 2 [148], ZnInX 4 [149,150], MnSb 2 X 4 [151], In 4 SnX 8 [152], quaternary Cu 2 FeSnX 2 (X = S, Se, and Te) [153]. SnS 2 is another example with hexagonal arrangement, which can be prepared via refluxing the bulk SnS 2 matrix in formamide to break the interlayer vdW interactions [154].…”