Fabrication of Z-Scheme Fe₂O₃–MoS₂–Cu₂O Ternary Nanofilm with Significantly Enhanced Photoelectrocatalytic Performance

Abstract

Ternary Fe2O3–MoS2–Cu2O nanocomposites were fabricated via electrodeposition and hydrothermal method. The as-prepared photocatalytic films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that MoS2 and Cu2O particles were successfully deposited onto the surface of Fe2O3 particles. MoS2 and Cu2O coloading achieved a synergetic effect on the improvement of the photoelectrochemical performance of Fe2O3 film. The highest photocurrent density was achieved on Fe2O3–MoS2–Cu2O film, which was 20, ∼5.5, and 2 times those of Fe2O3, Fe2O3–MoS2, and Fe2O3–Cu2O films, respectively. The excellent photoelectrocatalytic performance was attributed to the Z-scheme electron transfer mechanism, which results in the fast charge transfer and strong redox ability on the ternary composite. This work provides a promising Z-scheme ternary semiconductor for environmental purification and water oxidation.

Preparation of Cu3N/MoS2 Heterojunction through Magnetron Sputtering and Investigation of Its Structure and Optical Performance

“…The high intensity peaks with binding energies of 931.1 and 952.1 eV corresponded to the Cu2p 3/2 and Cu2p 1/2 orbital peaks, respectively, as shown in Figure 4c. Figure 4d illustrates the fitting of Cu2p peaks in the Cu 3 N layer with the Cu2p 3/2 and Cu2p 1/2 orbital peaks at the binding energies of 932.81 and 952.76 eV, respectively [27]. In Figure 4c,d, weaker peaks appeared at the binding energies of 933.9, 952.6 eV and 934.5, 954.4 eV, which belong to Cu 2+ , which is caused by the slight oxidation of Cu + .…”

“…many types of semiconductors to enhance light absorption from the ultraviolet to visible light regions [7,24], increase the separation and lifetime of charge carriers, and provide potential applications in visible-light catalysis [25,26]. Cu 3 N is a widely used material because of its metal-to-semiconductor properties [27,28]. Cu 3 N has been proposed for battery materials [2,29], catalyst additives [30], spin tunnel junction [31], memory [32], and electric transport materials [33] due to its wide range of optical band gap, low temperature of thermal decomposition, and excellent chemical activity.…”

Polyhedral Oligomeric Silsesquioxane Hybrid Polymers: Well‐Defined Architectural Design and Potential Functional Applications

“…a) General synthetic route for side‐chain‐type POSS‐hybrid polymer using POSS macro‐RAFT agents with POSS tethered on the side chain; R 1 and R 2 represent reactive and nonreactive substitutes of commercial POSS monomers or modified POSS monomers, and R′ 1 (R′ 1‐1 , R′ 1‐2 , R′ 1‐3 , R′ 1‐4 ) represent corresponding functional substitutes of monofunctional macro‐RAFT agents. b) Chemical structure of PHEMAPOSS‐ b ‐PMAA 22 and self‐assembly behavior in water with different lengths of hydrophilic PMAA moiety; and c) chemical structure of PMAPOSS‐ b ‐PVBPT 29 via RAFT and self‐assembly structure of PMAPOSS‐ b ‐PVBPT and Zn 2+ /PMAPOSS‐ b ‐PVBPT in ethylene glycol solution . Reproduced with permission .…”

“…b) Chemical structure of PHEMAPOSS‐ b ‐PMAA 22 and self‐assembly behavior in water with different lengths of hydrophilic PMAA moiety; and c) chemical structure of PMAPOSS‐ b ‐PVBPT 29 via RAFT and self‐assembly structure of PMAPOSS‐ b ‐PVBPT and Zn 2+ /PMAPOSS‐ b ‐PVBPT in ethylene glycol solution . Reproduced with permission . Copyright 2014, American Chemical Society; Copyright 2014, Materials Research Society.…”

“…For instance, Zhang et al have proposed a series of functionalized side chain POSS macromolecules via RAFT polymerization, in which PHEMAPOSS is functionalized as the RAFT agent by polymerizing a POSS‐functionalized monomer (HEMAPOSS). By properly controlling PHEMAPOSS length and adjusting the second kind of monomer, sidechain POSS polymers, such as PHEMAPOSS‐ b ‐PDMAEMA 21 , PHEMPOSS‐ b ‐PMAA 22 , PHEMAPOSS‐ b ‐P6CBMA 23 , and PHEMAPOSS‐ b ‐P(DMAEMA‐ co ‐CMA) 24 ,34b have been successfully designed and synthesized for applications in stimuli‐responsive behaviors, self‐assembly, liquid crystals, and controllable drug release. The chemical structure of PHEMAPOSS‐ b ‐PMAA and self‐assembly behaviors in water with different lengths of hydrophilic PMAA moiety are shown in Figure b .…”