A BiPO4/BiOCl heterojunction photocatalyst with enhanced electron-hole separation and excellent photocatalytic performance

Duo, Fangfang; Wang, Yawen; Mao, Xiaoming; Zhang, Xiaochao; Wang, Yunfang; Fan, Caimei

doi:10.1016/j.apsusc.2015.02.175

Cited by 136 publications

(41 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A PL spectrum is one of the most important factors to reveal the transfer of photoinduced charges between two semiconductors. As well known, lower PL intensity means lower recombination rate of photogenerated electron–hole pairs and higher photocatalytic activity . Figure shows the PL spectra of samples at room temperature.…”

Section: Resultsmentioning

confidence: 76%

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Vai̇zoğullar

2017

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Herein, we report the synthesis of a new composite catalyst immobilized on bentonite surface (BiOCl-ZnO-Bent). The samples were characterized using Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Brunauer-Emmett-Teller, photoluminescence, and Diffuse Reflectance Spectra (UV-Vis DRS) analyses. BiOCl were observed as nanosheets, whereas ZnO particles were nearly spherical (SEM images). Bentonite clay was used to increase the surface area of the samples. Brunauer-Emmett-Teller surface area of Bi/Zn/Bent (50%) catalyst was lower than that of the ZnO-Bent and BiOCl-Bent. The prepared photocatalyst decomposed 10 mg L −1 of 3-chlorophenol (3-CP) within 180 min under UV light. Bi/Zn/ Bent (50%) catalyst showed the highest photocatalytic activity. A proposed degradation mechanism for Bi/Zn/Bent (50%) composite is also discussed.

show abstract

Section: Resultsmentioning

confidence: 76%

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Vai̇zoğullar

2017

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…Theoretically, a p-n heterojunction will be formed when two dissimilar crystalline semiconductors with proper band positions combine [22]. As a result, the probability for the recombination of photo-generated charge carriers will be reduced [23].…”

Section: Page 4 Of 28mentioning

confidence: 99%

Surface decoration of BiPO4 with BiOBr nanoflakes to build heterostructure photocatalysts with enhanced photocatalytic activity

Liang

et al. 2015

Applied Surface Science

101

View full text Add to dashboard Cite

“…BiOCl is a new type of nontoxic and relatively stable bismuth‐based semiconductor photocatalytic material . Its open layered structure and indirect transition bandgaps are beneficial to the separation and transfer of electrons and holes, making it exhibit excellent photocatalytic performance in energy, chemical industry, environmental protection, materials, and other fields. However, BiOCl is a wide bandgap semiconductor with a bandgap of 3.19 to 3.44eV and a low utilization rate of visible light .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

et al. 2019

View full text Add to dashboard Cite

Summary In this paper, under the control strategy of surface charge of BiOCl photocatalyst and the electrostatic adsorption of anions and cations in potassium bromide (KBr) and polyvinylpyrrolidone (PVP), the self‐assembly of “walnut‐like” BiOCl/Br solid solution nanophotocatalyst at a lower temperature water bath was proposed for the first time. X‐ray diffraction (XRD), Raman, scanning electron microscopy (SEM), high‐resolution transmission electron microscopy (HRTEM), energy‐dispersive system (EDS), X‐ray photoelectron spectroscopy (XPS), Brunauer‐Emmett‐Teller (BET), UV‐Vis, photoluminescence spectroscopy (PL) and Mott‐Schottky curve, transient photocurrent densities, and electrochemical impedance spectroscopy (EIS) were used to analyze the properties of materials, including its morphology, element distribution and chemical states, specific surface area, electrochemical property, and photogenic charge transfer. Based on the degradation performance of RhB dye wastewater and phenol in visible and ultraviolet light, and the band structure of BiOCl/Br solid solution, the reason for the improved photocatalytic activity was deeply discussed, and the possible degradation mechanism was also put forward. The above results show that Br− can be inserted into the crystal lattice of BiOCl under the effect of electrostatic adsorption to form solid solution by the interaction between atomic orbitals, which not only reduces the bandgap width but also improves the separation and mobility of photogenic electrons and holes, causing the absorbed light to shift red to the visible region. In addition, when the nBr−/nCl− = 0.67, “walnut‐like” BiOCl/Br solid solution was formed, and this kind of special core‐shell structure not only can increase the specific surface area, increase the number of active sites, but also can make the light reflect and refract many times in the cavity and further increase the utilization rate of light energy, and then the best photocatalytic activity was achieved. This study provides an new method to enhance the photocatalytic performance of BiOCl and be conducive to the development of modern material science.

show abstract

A BiPO4/BiOCl heterojunction photocatalyst with enhanced electron-hole separation and excellent photocatalytic performance

Cited by 136 publications

References 44 publications

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Surface decoration of BiPO4 with BiOBr nanoflakes to build heterostructure photocatalysts with enhanced photocatalytic activity

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

Contact Info

Product

Resources

About