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

Abstract

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.

Facile Fabrication of Z-Scheme Bi2WO6/WO3 Composites for Efficient Photodegradation of Bisphenol A with Peroxymonosulfate Activation

“…The electrochemical impedance spectra (EIS) and photocurrent responses were conducted to explore the interfacial charge separation efficiency, and the results are depicted in Figure 11. Generally, a lower radius of the Nyquist plot represents a faster interfacial charge transport [45,46].…”

“…The electrochemical impedance spectra (EIS) and photocurrent responses were conducted to explore the interfacial charge separation efficiency, and the results are depicted in Figure 11. Generally, a lower radius of the Nyquist plot represents a faster interfacial charge transport [45,46]. The electrochemical impedance spectra (EIS) and photocurrent responses were conducted to explore the interfacial charge separation efficiency, and the results are depicted in Figure 11.…”

Improved photoelectrode performance of chemical solution-derived Bi2O3 crystals via manipulation of crystal characterization

“…Bi 2 O 3 crystals with various micro-and nanostructures, including nanosheet, nanorod, nanober, and sphere have been successfully synthesized via various chemical solution routes. [11][12][13][14] Among various morphologies, nanosheet semiconductor oxides have drawn substantial research interest due to their unique geometry with outstanding electronic properties and high specic surface area, which could provide large amount of reaction sites and enable rapid charges generation and transport. 15,16 Till now, various synthetic methods have been explored to prepare sheet-or plate-like b-Bi 2 O 3 crystals with various surface features.…”

Structural, Optical and Photocatalytic Activity of Multi-heterojunction Bi2O3/Bi2O2CO3/(BiO)4CO3(OH)2 Nanoflakes Synthesized via Submerged DC Electrical Discharge in Urea Solution

“…The energy band structure of Bi 2 O 3 /Bi 2 O 2 CO 3 /(BiO) 4 CO 3 (OH) 2 multi-heterojunction before and after junction are proposed in Fig. 10 [ 26 , 81 , 82 ]. The Fermi level of α-Bi 2 O 3 and (BiO) 4 CO 3 (OH) 2 which are p-type photocatalysts are close to the valence band, and the Fermi level of n-type Bi 2 O 2 CO 3 is close to the conduction band [ 26 , 83 ].…”