Preparation of Efficient BiOBr/MIL‐88B(Fe) Composites with Enhanced Photocatalytic Activities

Abstract

In this study, a novel composite containing an iron based metal-organic framework (MOF) and BiOBr was successfully synthesized by a simple method, and was fully characterized by X-ray diffraction patterns, Fourier transform infrared spectra, UV-vis diffuse reflectance spectra, and transmission electron microscopy. Moreover, the photocatalytic activities of BiOBr/MIL-88B(Fe) composites and the pure materials were evaluated by measuring the degradation of Rhodamine B under visible light. The results show that the composite exhibits better photocatalytic activities than pure materials, which can be ascribed to the high adsorption capacity of MIL-88B(Fe) and the enhanced separation of photogenerated charge carriers from assembly of MIL-88B(Fe) on BiOBr. And the effects of various operating parameters such as catalyst dosage, medium pH, the mass ratio of BiOBr, and MIL-88B(Fe) and the dye initial concentration on the degradation of RhB have been studied.

Loading and Sustained Release of Pralidoxime Chloride from Swellable MIL-88B(Fe) and Its Therapeutic Performance on Mice Poisoned by Neurotoxic Agents

“…The IR spectrum of MIL-88B(Fe) was consistent with previous studies. 32,33 Specifically, the broad absorption band near 3200 cm −1 corresponds to the stretching vibration of the O−H bond in H 2 O, while the bands at 1573 and 1382 cm −1 correspond to symmetrical and antisymmetric stretching vibrations of −COO− in terephthalic acid, respectively. The bands at 810 and 745 cm −1 correspond to the bending vibration of the benzene ring.…”

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH2–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

“…21 Yue et al prepared BiOBr/MIL-88B(Fe), which adopted the cooperative effect of high adsorption capacity for RhB and thus enhanced light-driven carrier separation to improve photocatalytic efficiency in low-concentration RhB solution. 22 Qu et al combined Fe-MOF with BiOBr and utilized the photo-Fenton reaction between hydrogen peroxide and Fe-MOF to achieve rapid degradation of RhB, while the removal rate decreased significantly without H 2 O 2.…”

H2O2 assisted photocatalysis over Fe‐MOF modified BiOBr for degradation of RhB

“…Also, BiOBr/MIL-88B(Fe) had a better photocatalytic property than pure BiOBr or MIL-88B(Fe). 15 Therefore, it is feasible to combine Fe-MOFs and BiOBr, which may act as better catalyst for photocatalysis assisted by hydrogen peroxide (H 2 O 2 ).…”

“…prepared BiOBr/ MIL‐53 (iron, Fe) using a simple co‐precipitation method and the photoinduced electron–hole pair recombination was inhibited. Also, BiOBr/MIL‐88B(Fe) had a better photocatalytic property than pure BiOBr or MIL‐88B(Fe) 15 . Therefore, it is feasible to combine Fe‐MOFs and BiOBr, which may act as better catalyst for photocatalysis assisted by hydrogen peroxide (H 2 O 2 ).…”