Facile Synthesis, Characterization, and Visible-light Photocatalytic Activities of 3D Hierarchical Bi2S3 Architectures Assembled by Nanoplatelets

Abstract

3D hierarchical Bi 2 S 3 architectures have been successfully synthesized via a simple and effective hydrothermal process. The as-prepared Bi 2 S 3 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, and UV-vis diffuse reflectance spectrum (DRS). The observation of field emission scanning electron microscope (FESEM) images showed that numerous nanoplatelets are randomly arranged and interconnected with each other, which are assembled into 3D hierarchical Bi 2 S 3 architectures. The photocatalytic activity of the as-prepared Bi 2 S 3 samples was evaluated by the degradation of Rhodamine B (RhB) under visible light irradiation. The effect of hydrothermal temperature, reaction time, pH value and shape on the photocatalytic efficiency of the as-prepared Bi 2 S 3 samples was investigated. The results showed that 3D hierarchical Bi 2 S 3 architectures prepared at 165 • C for 12 h at a pH of 2.4 exhibits high photocatalytic efficiency, which could be ascribed to the synergetic effect of the shape, surface area, crystallinity, band gap and crystalline size.

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

“…As reported in the previous work [32,60,61], 60 mL MB aqueous solution (1.0 × 10 −5 M) was added into a culture dish with a diameter of 70 mm which was coated with 80 mg prepared catalyst on the surface. Two daylight lamps (60 W, λ ≥ 400 nm) were used as a light source to trigger the photocatalytic reaction.…”

Synthesis of Superparamagnetic Cu0.4Zn0.6Fe2O4-Implanted Bi2S3-Capped TiO2 2D and 3D Nanostructures for Visible Light Photocatalysis

“…14 Photodegradation of methylene blue in the presence of Cu 0.4 Zn 0.6 Fe 2 O 4 /TiO 2 -Bi 2 S 3 nanostructures is unlikely a dye-sensitized reaction. This proposition stems from the facts that methylene blue degradation on Bi 2 S 3 is a photocatalyzed one 33 and methyl orange 33 and rhodamine B 10,11 dyes are also photocatalytically degraded by Bi 2 S 3 . Furthermore, Bi 2 S 3 -deposited TiO 2 photocatalyzes degradation of methyl orange, 16,18 orange G, 14 orange II, 15 4-hydroxybenzoic acid, 15 and 2,4-dichlorophenoxyacetic acid 17 under visible light.…”

“…10 4 –10 5 cm –1 ) and reasonable incident photon to electron conversion efficiency . Visible light photocatalytic mineralization of organic pollutants by nanostructured Bi 2 S 3 is well established. , TiO 2 could be sensitized and enabled to absorb light of longer wavelength, by coupling with a narrow-band-gap semiconductor such as Bi 2 S 3 . Bi 2 S 3 /TiO 2 heterojunction enhances charge separation, and nanocrystalline Bi 2 S 3 /TiO 2 shows improved photocurrent ( J ) with visible light .…”

1D/2D Rod-sheet Shape Bi2S3 Photocatalyst for Photocatalytic Reduction Cr(VI) under Visible Light

“…Wu et al [22] used a lowtemperature molten-salt method for the preparation of rod-like Bi2S3 single crystals and investigated the effects of annealing temperature and the dosage of molten salt (KSCN) on the morphology and Hg 0 elimination properties of Bi2S3, which showed that Bi2S3 single crystals have a better Hg 0 capture ability due to the one-dimensional rod-like structure with sufficient exposed adsorption sites, as well as the higher binding energy of Bi 3+ species. Jia et al [23] utilized a CTAB-assisted hydrothermal synthesis route to obtain 3D Bi2S3 for photocatalytic degradation of RhB. However, for the above-mentioned methods for synthesizing Bi2S3, complex and expensive equipment is generally required, or additional surfactants, ligands, or toxic organic solvents are needed [20][21][22][23][24][25][26], which are not environmentally friendly.…”

“…Jia et al [23] utilized a CTAB-assisted hydrothermal synthesis route to obtain 3D Bi2S3 for photocatalytic degradation of RhB. However, for the above-mentioned methods for synthesizing Bi2S3, complex and expensive equipment is generally required, or additional surfactants, ligands, or toxic organic solvents are needed [20][21][22][23][24][25][26], which are not environmentally friendly. Furthermore, most studies have focused on a single morphology of Bi2S3, and the research on the 1D/2D Bi2S3 is relatively limited, indicating the need for further exploration.…”