Two-dimensional CdS/SnS₂ heterostructure: a highly efficient direct Z-scheme water splitting photocatalyst

Abstract

A desired water splitting photocatalyst should not only possess suitable bandgap and band edge position, but also host the spontaneous progress for overall water splitting without the aid of any...

Monolayer Fullerene Networks as Photocatalysts for Overall Water Splitting

“…As a result, an optimal band gap around 2 eV is required, and the band edges must span the redox potential. − For ( ii ), a type-II band alignment can spontaneously separate the electrons and holes. Based on these requirements, a variety of candidate materials have been proposed for efficient water splitting. − Among all the candidates, carbon nanomaterials exhibit high physical stability and rich redox chemistry. , In particular, fullerene, the cage structure of C 60 , displays high quantum efficiency in photocatalytic reactions because of their large surface area, abundant micropores, increased surface active sites, and efficient electron transport properties. − In photocatalysis, C 60 can enhance the photocatalytic activity via different mechanisms: it can work as an electron acceptor owing to rapid carrier separation, ,− or as an energy transfer mediator, or as an electron donor due to high photosensitivity . In addition, for composite materials, the introduction of fullerene results in better crystallization by reducing the defects and can also improve the stability of the composites, , which further enhance the photocatalytic efficiency.…”

MoSe2-WS2 Nanostructure for an Efficient Hydrogen Generation under White Light LED Irradiation

“…The electron–hole pairs are usually generated on MoSe 2 -WS 2 under the visible light illumination. In the development of visible-light-driven devices, the nanostructured MoSe 2 -WS 2 composite is a so-called Z-scheme photocatalyst [ 44 , 45 , 46 , 47 ]. In this system, electrons are excited from the valence band (VB) to the conduction band (CB) of WS 2 upon visible light illumination, then transferred to VB of MoSe 2 and finally reach to CB of MoSe 2 during generation of H 2 .…”

Enhancing the activity and stability of Cu2O nanorods via coupling with a NaNbO3/SnS2 heterostructure for photoelectrochemical water-splitting

“…66 Fu et al studies the 2D/2D CdS/SnS 2 heterostructure (CSHS) to achieve a highly efficient photocatalytic water-splitting nanostructure. 67 The studies stated above indicate that a photocatalyst may be prevented from undergoing photocorrosion if a composite or core/shell heterojunction is created, which would help to improve the activity and stability of the photocatalyst.…”