Ultrafine MoS₂/Sb₂S₃ Nanorod Type‐II Heterojunction for Hydrogen Production under Simulated Sunlight

Abstract

Hydrogen is an ideal new energy in view of its merits of high valueadded, eco-friendliness and renewability, attracting extensive attentions in energy field. [3] In recent years, solar-to-fuel conversion has been highly investigated and is identified as a promising strategy for hydrogen production. [4] However, undesirable conversion efficiency dramatically hinders its practical application. To address this challenge, extensive works have been devoted to exploit highly efficient photocatalysts for solar-driven hydrogen production. For instance, Song et al. reported a semiconductive organolead iodide layered crystalline material for improved photocatalytic water splitting performance, [5] and An et al. developed a self-supporting 3D carbon nitrides with broadened light harvesting and promoted carriers separation for improved photoactivity. [6] Transition metal sulfides (TMSs) have become a kind of potential photocatalytic materials due to their merits of broadband light harvesting and low work function. [7] However, their microstructure is very easy to be photocorroded due to unstable chemical state of sulfur atoms, leading to the unstable photoactivity during the actual operation. [8] Among the TMSs, antimony sulfide (Sb 2 S 3 ), a typical 3D V-VI semiconductor with prominent structural stability, is widely applied in the fields of photovoltaic device, battery material, and electrocatalysis in view of its merits of nontoxicity, low cost, good lightharvesting, rich-reserves, and easy to preparation. [9] However, Sb 2 S 3 easily grows into large-size structure in synthetic process, so that body-to-surface carriers' migration takes longer, which dramatically hinders its application in photocatalysis field. To address this critical issue, Cao et al. supported Ag NPs on hollow Sb 2 S 3 microspheres to construct metal-semiconductor nanostructures, [10] Zhang et al. constructed a WO 3 /Sb 2 S 3 heterojunction, [11] Du et al. deposited Sb 2 S 3 on Mo-doped WO 3 films, [12] and Wang et al. synthesized a Sb 2 S 3 /g-C 3 N 4 heterostructure. [13] Obviously, the formation of built-in electric field can effectively promote the photocarriers' migration in body structure, achieving highly improved photoactivity.Differently from Sb 2 S 3 , molybdenum disulfide (MoS 2 ), a typical 2D layered TMS semiconductor, is widely used to prepare photocatalysts with high-performance by serving as main catalyst or cocatalyst due to its excellent light-harvesting, easy body-to-surface photocarriers' migration, and abundant Transition metal sulfides (TMSs) have been widely used as photocatalytic materials in view of the merits of broadband light harvesting and low work function. However, the photocorrosion generally leads to the unstable photoactivity. Antimony sulfide (Sb 2 S 3 ) is a TMS semiconductor with prominent structural stability due to its large-size microstructure. However, the slow body-to-surface carriers' migration dramatically hinders its application in photocatalysis field. Herein, to gain a stable TMS-based photocatalyst ...

PtTe2/Sb2S3 Nanoscale Heterostructures for the Photocatalytic Direct Z-Scheme with High Solar-to-Hydrogen Efficiency: A Theoretical Investigation

“…Perales et al obtained Sb 2 S 3 multilayers by physical vapor deposition on class substrates and made a comparison of the material properties between multilayer and monolayer. Li et al . grew ultrafine MoS 2 on the Sb 2 S 3 nanorod to form a type-II heterostructure, which significantly accelerated the migration of photogenerated carriers in the depletion region.…”

Synergistic Electric Metal (Ni SAs)‐Semiconductor (CdS NPs) Interaction for Improved H2O‐to‐H2 Conversion Performance under Simulated Sunlight

“…Compared with CdS NPs, the CdS–Ni 1.25‰ nanocatalyst shows significantly reduced open‐circuit voltage (−976 → −929 mV, current density of −0.1 mV cm −1 ) and polarization overpotential (1033 → 1005 mV). It is well proved that the EMSI endows CdS–Ni 1.25‰ nanocatalyst with stronger photoreduction ability, [ 32 ] which is also a vital factor for obtaining high HTH conversion photoactivity.…”

“…1005 mV). It is well proved that the EMSI endows CdS-Ni 1.25‰ nanocatalyst with stronger photoreduction ability, [32] which is also a vital factor for obtaining high HTH conversion photoactivity.…”