Magnetically Recyclable MoS₂/Fe₃O₄ Hybrid Composite as Visible Light Responsive Photocatalyst with Enhanced Photocatalytic Performance

Abstract

Photocatalysis is one of the most promising technologies in wastewater treatment. However, the inactivity to visible light and the inconvenience to recycle severely limit its practical application. In this work, via a facile hydrothermal method, Fe3O4 NPs were integrated onto the surfaces of 3D ball-flower-like MoS2 microspheres as efficiently visible light responsive and magnetically recyclable photocatalysts. Experimental results indicate that, an optimal loading amount (20 wt %) of Fe3O4 NPs can not only effectively enhance the photocatalytic ability of the MoS2/Fe3O4 (MF) hybrid composite with approximately 2 times better than pure MoS2, but also make it conveniently recycle from water by an external magnetic field. The photoelectrochemical studies also reveal that the incorporation of Fe3O4 NPs can effectively enhance the charge transfer rate and accelerate separation of photoinduced charge carriers. The surface catalytic mechanism of MF hybrid composite was also explored through XPS spectra. With both the excellent photocatalytic performance and magnetical recyclability, the 20 wt %-MF hybrid composite is considered to be a promising and competitive photocatalyst for wastewater treatment utilizing solar energy.

MOFs Derived Hetero-ZnO/Fe2O3 Nanoflowers with Enhanced Photocatalytic Performance towards Efficient Degradation of Organic Dyes

“…The red shift in the absorption spectrum of ZnO/Fe 2 O 3 NFs indicates a strong interaction between ZnO and Fe 2 O 3 , accounting for the narrowing of the band gap [13]. Simultaneously, the electronic structure of the mixed phase may be altered greatly with respect to that of any single component, which is conducive to the enhanced photocatalytic performance [36][37][38][39]. According to the absorption spectra (Figure 6a), the plots of (αhv) 1/2 versus photon energy (hv) of the as-prepared samples are profiled in Figure 6b.…”

Sustainable Liquid-Phase Exfoliation of Layered Materials with Nontoxic Polarclean Solvent

“…The advent of two-dimensional (2D) materials had a ground-breaking impact on science and technology, 1 − 13 due to their peculiar properties with high application capabilities in different fields, such as energy storage, 14 − 22 catalysis, 23 − 27 optoelectronic devices, 28 − 31 and gas sensing. 32 − 34 A key point for the technological exploitation of 2D materials is represented by their large-scale production, which still remains challenging.…”

2D CTAB-MoSe2 Nanosheets and 0D MoSe2 Quantum Dots: Facile Top-Down Preparations and Their Peroxidase-Like Catalytic Activity for Colorimetric Detection of Hydrogen Peroxide

“…Molybdenum disulfide (MoS 2 ), the most prominent member of the TMD family, possesses distinctive properties and has found diverse successful applications in electronics [ 18 ], energy devices [ 19 ], photocatalysis [ 20 ], and sensors [ 21 , 22 ]. In particular, the peroxidase-like catalytic ability of a few MoS 2 nanostructures has been shown by researchers [ 23 , 24 ].…”