Facile fabrication of Bi2S3/SnS2 heterojunction photocatalysts with efficient photocatalytic activity under visible light

Abstract

a b s t r a c tIn this work, Bi 2 S 3 /SnS 2 heterojunction photocatalysts were prepared by combining a hydrothermal technique and a facile in situ growth method. The nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, inductively coupled plasma spectroscopy, X-ray photoelectron spectroscopy, UVeVis diffusion reflectance spectroscopy and roomtemperature photoluminescence spectra. Their photocatalytic performances were evaluated by degrading methyl orange (MO) in aqueous solution (50 mg/L) under visible light (l > 420 nm) irradiation. It was found that when the mass percentage of Bi 2 S 3 in Bi 2 S 3 /SnS 2 was 7.95 wt%, the as-prepared Bi 2 S 3 / SnS 2 nanocomposite showed the best photocatalytic activity for the degradation of MO. The highly improved performance of the Bi 2 S 3 /SnS 2 nanocomposite was mainly ascribed to the efficient charge separation.

Facile fabrication of ZnIn2S4/SnS2 3D heterostructure for efficient visible-light photocatalytic reduction of Cr(VI)

“…In order to improve the usability of the solar energy, development of visible-light-responsive photocatalysts is essential [16][17][18][19][20][21][22][23]. Metal sulfide semiconductors, which are a superior type of visible-light-driven photocatalysts, are efficient in absorbing visible light [24][25][26][27][28][29][30].…”

Facile Synthesis of BiOBr/Bi2Sn2O7 Heterojunction Photocatalysts with Improved Photocatalytic Activities

“…TiO 2 is a famous semiconductor owning improved photocatalytic activities for the oxidative degradation of organic compounds . However, TiO 2 with band gap of 3.2 eV has poor nature solar efficiency and slow reaction rate, which hinders its further applications . Thus, in order to utilize abundant and clean solar energy, the research and development of visible light responsive photocatalysts has become an appealing challenge.…”

Ag2S Quantum Dots Based on Flower-like SnS2 as Matrix and Enhanced Photocatalytic Degradation

“…However, the photogenerated electrons and holes of SnS 2 composites can severely limit the photocatalytic performance because the recombination of photogenerated electrons and holes exists in the surface and interior of SnS 2 photocatalysts [ 3 , 4 ]. Consequently, many researchers have been devoted to improve the separation of photogenerated charges of SnS 2 -layered material by forming heterojunctions with other semiconductor photocatalysts, such as g-C 3 N 4 [ 5 ], ZnS [ 6 ], Bi 2 S 3 [ 7 ], SnS [ 8 ], CdS [ 9 ], Al 2 O 3 [ 10 ], SnO 2 [ 11 ], MgFe 2 O 4 [ 12 ], LaTi 2 O 7 [ 13 ], BiOBr [ 14 ], and BiOCl [ 15 ].…”