Efficient Degradation of Rhodamine B with the BiOCl/Bi₂Fe₄O₉ Heterojunction Photocatalyst

Abstract

BiOCl/Bi 2 Fe 4 O 9 photocatalyst was prepared by a coprecipitation−hydrothermal method. The heterojunction structure generated by the composite of BiOCl and Bi 2 Fe 4 O 9 reduced the electron−hole recombination efficiency and improved the degradation rate of RhB. At 240 min, 20% BiOCl/Bi 2 Fe 4 O 9 represented the excellent degradation effect on 10 mg/L RhB; the degradation efficiency reached 99.56%; and the reaction rate constant was 0.01534 min −1 , which was 5.76 times and 6.06 times that of Bi 2 Fe 4 O 9 and BiOCl, respectively. The main active substance of the photocatalytic degradation of dyes was superoxide radical O 2 − •. Five cycles of the experiment proved the relative stability of BiOCl/Bi 2 Fe 4 O 9 .

Construction of a BiOCl/Bi2O2CO3 S-Scheme Heterojunction Photocatalyst via Sharing [Bi2O2]2+ Slabs with Enhanced Photocatalytic H2O2 Production Performance

“…It is clear that a decrease in PL intensity is usually associated with a reduced carrier recombination probability. , Intriguingly, the B/BC-162 composite showed the lowest peak intensity in the PL measurements, markedly lower than those of Bi 2 O 2 CO 3 and BiOCl. This significant reduction in peak intensity strongly indicates that forming BiOCl/Bi 2 O 2 CO 3 heterojunctions effectively curbed carrier recombination . Additionally, time-resolved photoluminescence spectroscopy (TRPL) was utilized to assess the longevity of photogenerated carriers in various photocatalysts, as depicted in Figure d.…”

Photocatalytic Degradation of Tetracycline Hydrochloride Based on the Structure–Property Exploration of BiOCl

“…Moreover, the dopants on the surface of BiOCl might favor the adsorption of reactants and the trapping of photoelectrons. Another approach is to modify the surface of BiOCl with conductive carbon materials, which could facilitate the separation of electrons from BiOCl and prolong the carriers’ lifetime. , Besides, integrating BiOCl with another semiconductor to form a Type-II or Z-scheme heterojunction could also efficiently enhance the separation of photoelectrons/holes. ,− …”

Dual Active Site Mediated Photocatalytic H2 Evolution through Water Splitting Using CeO2/PPy/BFO Double Heterojunction Catalyst

“…On the other hand, bismuth ferrites (BFO), which in general possess two crystalline structures of mullite-type Bi 2 Fe 4 O 9 (band gap 1.8–2.2 eV) and perovskite-type BiFeO 3 (band gap ∼2.2 eV), are attractive visible light photocatalysts. , Bi 2 Fe 4 O 9 is a semiconductive material with a narrow band gap that enables visible light harvesting and enhances photocatalytic efficiency. Considering the spin-frustrated multiferroic, the presence of magnetic moments in Bi 2 Fe 4 O 9 accelerates the charge carrier separation and migration, which also improves the photocatalytic performance.…”