Visible light β-Bi2O3/BiOCl heterojunction photocatalyst with highly enhanced photocatalytic activity

Tang, Xinde; Ma, Changsong; Liu, Ning; Liu, Chenglu; Liu, Shuilin

doi:10.1016/j.cplett.2018.08.045

Cited by 39 publications

(20 citation statements)

References 46 publications

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“…The obtained straight-line segment of the graphic is extended to the x-axis, and the corresponding values at the intersection point are the forbidden bandwidths of β-Bi 2 O 3 and BiOCl. According to Figure 9b,c, it is estimated that the forbidden bandwidth of β-Bi 2 O 3 is about 2.37 eV, which is similar to the reported value [45], and the forbidden bandwidth of BiOCl is about 3.21 eV, which is similar to the results reported in the literature [39,46].…”

Section: Uv-vis Absorption Spectrum Analysis Of the Samplessupporting

confidence: 89%

“…As shown in Figure 2, the TEM image in Figure 2a reveals that the BC-1.5 sample is a flower ball of about 2 µm in size; many nanosheets grow on the surface of the ball; this is consistent with the characterization of SEM. The HRTEM image in Figure 2b shows that the surface nanosheets have clear lattice fringes with a lattice spacing of approximately 0.73 nm, corresponding to the (001) planes of tetragonal phase BiOCl [39]. The HRTEM image in Figure 2c for the inner parts of the BC-1.5 reveals that two types of lattice fringes.…”

Section: Phase Composition and Microstructure Analysis Of The Samplesmentioning

confidence: 96%

“…Figure 7b,d are high-resolution XPS spectrum of the Bi 4f, O 1s, and Cl 2p characteristic peaks of the samples, respectively. For β-Bi 2 O 3 , the spectrum of Bi 4f at the binding energies at 158.5 eV and 163.8 eV correspond to the Bi 4f 5/2 and Bi 4f 7/2 levels, respectively, which correspond to Bi 3+ [39,42]. For the pure BiOCl sample, the binding energies corresponding to the Bi 4f 5/2 and Bi 4f 7/2 energy levels are located at 159.5 eV and 164.8 eV, respectively, which are assigned to Bi 3+ in BiOCl.…”

Section: Xps Analysis Of the Samplesmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Kong

Zhang

et al. 2019

Nanomaterials

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Tetracycline cannot be effectively degraded in wastewater treatment. Therefore, the development of excellent photocatalysts is of significant importance for environmental protection. In this study, a β-Bi2O3/BiOCl heterojunction photocatalyst with hollow flower-like microspheres was successfully synthesized by the in-situ reaction of HCl and β-Bi2O3 hollow spheres. The prepared samples are characterized by Scanning electron microscopy, Transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, N2 physical adsorption, UV-vis diffuse reflectance spectroscopy, and Photoluminescence. Then, research on the photocatalytic performance for the degradation of tetracycline hydrochloride was conducted. The results show that the photocatalytic performance of the β-Bi2O3/BiOCl composite is significantly better than the β-Bi2O3 and BiOCl. The increase in photocatalytic activity is due to the formation of a heterojunction between β-Bi2O3 and BiOCl, which effectively promotes the separation of photogenerated electron-hole pairs. Additionally, the heterojunction nanocomposite demonstrated the outstanding photocatalytic stability after five cycles, which indicates that the material can be used for water environment purification. This paper provides assistance for studying the photocatalytic mechanism of heterojunction photocatalytic materials.

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Section: Uv-vis Absorption Spectrum Analysis Of the Samplessupporting

confidence: 89%

Section: Phase Composition and Microstructure Analysis Of The Samplesmentioning

confidence: 96%

Section: Xps Analysis Of the Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Kong

Zhang

et al. 2019

Nanomaterials

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show abstract

“…The current density of BiOCl @ Bi 2 O 3 in each light-on cycle is about −1.05 µA cm −2 , which is 7 times that of BiOCl. In contrast, for BiOCl @ Bi 2 O 3 with vertical heterostructure reported in reference, [32] the current density is about 0.70 µA cm −2 which is less than 5 times that of pure BiOCl, indicating that lateral heterostructure is superior than vertical heterostructure. Thus, it can be documented that strong internal electric field at the lateral epitaxial heterojunction of BiOCl @ Bi 2 O 3 can help to facilitate more efficient photoexcited charge separation and generate more photoinduced charge carriers.…”

mentioning

confidence: 71%

Promoted Photocharge Separation in 2D Lateral Epitaxial Heterostructure for Visible‐Light‐Driven CO₂ Photoreduction

Wang

Zhao

et al. 2020

Advanced Materials

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solar-energy conversion process, not only in solar cell but also in photocatalysis, involves solar-light harvesting and photoexcited charge carrier separation/transportation. [8,9] Heterostructure, in which materials with different properties are integrated together, generally can harvest wide solar light derived from multi ple components and possesses prominent photoexcited charge separation/transportation properties benefiting from internal electric field formed at the heterointerface. [10] Hence, exploring suitable components to construct heterostructure represents an efficient and facile strategy to improve the solar energy conversion efficiency. Nowadays, 2D materials have attracted enormous research interest in optical electronic devices, catalysis, and solar-energy conversion fields due to their high specific surface area, [11] large fraction of surface exposed atoms, [12] and excellent mechanical, optical, and electronic properties. [13,14] Benefiting from layered structural properties, 2D materials are prone to be constructed into heterostructures. Typically, 2D heterostructures include vertical heterostructures in which the layers of various 2D materials are stacked vertically, [15] and lateral heterostructures in which multiple 2D materials are seamlessly stitched lateral. [16] Most of the current reported 2D heterostructures

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“…The improved photoactivity of BiOCl‐CoWO 4 was endorsed to the synergistic effect between BiOCl and CoWO 4 nanoparticles. Moreover, the photoactivity of the BiOCl‐CoWO 4 ‐1 nanocomposite was compared with the other materials reported in the literature and it was found that the BiOCl‐CoWO 4 nanocomposite possesses excellent photocatalytic property (Table ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of BiOCl‐CoWO₄ nanocomposites with improved photocatalytic activity

Chowdhury

Shambharkar

2019

Int J Applied Ceramic Tech

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We have synthesized novel BiOCl-CoWO 4 heterostructured nanocomposites through chemical precipitation route with different amount of CoWO 4 using KCl as Cl source at a temperature of 100°C, 4 hours. X-ray diffraction, transmission electron microscopy, UV-visible NIR spectroscopy, photoluminescence spectroscopy, N 2 adsorption-desorption isotherms, and electrochemical impedance spectroscopy were performed to gain the crystal structure, morphology, optical properties, surface area, and charge separation of the prepared photocatalysts. BiOCl-CoWO 4 composites demonstrated the diffraction peaks of both monoclinic CoWO 4 nanoparticles and tetragonal BiOCl indicating the formation of the nanocomposite. TEM observations have shown that CoWO 4 nanoparticles were deposited on the BiOCl surface. Photoluminescence, fluorescence lifetime study, and Electrochemical impedance spectroscopy responses of materials indicated a good separation efficiency of charge carriers in BiOCl-CoWO 4 -1. The photodegradation efficiency of the prepared materials was assessed by the decomposition of rhodamine B (RhB) dye solution under sunlight irradiation. Among the synthesized materials, the BiOCl-CoWO 4 -1 composite photocatalyst exhibited maximum photocatalytic activity. Thus the resulting heterostructure favored the efficient charge and energy transfer between BiOCl and CoWO 4 nanoparticles across the interface. The investigations from the radical scavenger tests showed that photogenerated h + , O 2 •− , and • OH radicals were involved in the photodegradation of RhB.

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Visible light β-Bi2O3/BiOCl heterojunction photocatalyst with highly enhanced photocatalytic activity

Cited by 39 publications

References 46 publications

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Promoted Photocharge Separation in 2D Lateral Epitaxial Heterostructure for Visible‐Light‐Driven CO₂ Photoreduction

Synthesis and characterization of BiOCl‐CoWO₄ nanocomposites with improved photocatalytic activity

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Visible light β-Bi2O3/BiOCl heterojunction photocatalyst with highly enhanced photocatalytic activity

Cited by 39 publications

References 46 publications

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Preparation of Hollow Flower-Like Microspherical β-Bi2O3/BiOCl Heterojunction and High Photocatalytic Property for Tetracycline Hydrochloride Degradation

Promoted Photocharge Separation in 2D Lateral Epitaxial Heterostructure for Visible‐Light‐Driven CO2 Photoreduction

Synthesis and characterization of BiOCl‐CoWO4 nanocomposites with improved photocatalytic activity

Contact Info

Product

Resources

About

Promoted Photocharge Separation in 2D Lateral Epitaxial Heterostructure for Visible‐Light‐Driven CO₂ Photoreduction

Synthesis and characterization of BiOCl‐CoWO₄ nanocomposites with improved photocatalytic activity