Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A

Xia, Jiexiang; Ge, Yuping; Di, Jun; Chen, Zhigang; Liu, Pengjun

doi:10.1016/j.jcis.2016.03.046

Cited by 44 publications

(11 citation statements)

References 43 publications

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“…The above results can also be confirmed by the EIS measurements. According to previous reports [52][53][54][55], the smaller radius of the Nyquist circle implies a faster electron transfer rate. As shown in Figure 13, the radius on the EIS Nyquist plot of FePcS-PMA-LDH/GCE was much smaller than that of ZnAl-LDH/GCE and FePcS-LDH/GCE, indicating a faster charge transfer occurred on the interface of the FePcS-PMA-LDH/GCE electrode.…”

Section: Photo-fenton Mechanism Discussionmentioning

confidence: 58%

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Huang

Tian

et al. 2020

Materials

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1) Background: Iron tetrasulfophthalocyanine with a large nonlinear optical coefficient, good stability, and high catalytic activity has aroused the attention of researchers in the field of photo-Fenton reaction. Further improvement of the visible light photo-Fenton catalytic activity under circumneutral pH conditions for their practical application is still of great importance. (2) Methods: In this paper, iron tetrasulfophthalocyanine (FePcS) and phosphomolybdic acid (PMA) cointercalated layered double hydroxides (LDH) were synthesized by the ion-exchange method. All samples were fully characterized by various techniques and the results showed that FePcS and PMA were successfully intercalated in layered double hydroxides and the resulted compound exhibited strong absorption in the visible light region. The cointercalation compound was tested as a heterogeneous catalyst for the visible light photo-Fenton degradation of bisphenol A (BPA) at circumneutral pH.(3) Results: The results showed that the degradation and total organic carbon removal efficiencies of bisphenol A were 100% and 69.2%, respectively. (4) Conclusions: The cyclic voltammetry and electrochemical impedance spectroscopy measurements demonstrated that the main contribution of PMA to the enhanced photo-Fenton activity of FePcS-PMA-LDH comes from the acceleration of electron transfer in the reaction system. Additionally, the possible reaction mechanism in the photo-Fenton system catalyzed by FePcS-PMA-LDH was also proposed.

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Section: Photo-fenton Mechanism Discussionmentioning

confidence: 58%

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Huang

Tian

et al. 2020

Materials

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“…Especially, the shell nature is related to a more efficient light‐harvesting due to multiple light reflections within the void space; meanwhile, the ultrathin layered structure is offered to a shorter diffusion length of charge carriers, promoting the separation of the electron–hole pairs and inhibiting the recombination of charge carriers. Then the remarkable photocatalytic activity over the as‐fabricated Bi 4 O 5 Br 2 nanoshells is displayed via the primary active species (h + , •OH radicals and/or O •− anion) oxidised the organics into the small inorganic molecules based on the Bi 4 O 5 Br 2 nanoparticles [14, 18, 21, 22], thus the suggested photocatalytic degradation mechanism of RC over Bi 4 O 5 Br 2 nanoshells might be illustrated in Fig. 4 e .…”

Section: Resultsmentioning

confidence: 99%

“…Yang's group constructed Bi 4 O 5 Br 2 with different morphologies of nanosheets, microspheres and hollow spheres via an ionic liquid-in-water microemulsion procedure for the removal of fungicide o-phenylphenol and antibacterial agent norfloxacin and tetracycline hydrochloride under visible light irradiation [19]. Beyond above, a few types Bi 4 O 5 Br 2 nanoparticles were also produced for the practical application in the photo-degradation of organic contaminants by various of physicochemical methodologies such as a hydrothermal method, a structure reorganisation route, a hydrolysis process and an ionic liquid-assisted strategy and so on [20][21][22][23][24]. However, to the best of our knowledge, few publications on the preparation of ultrathin layered Bi 4 O 5 Br 2 nanoshells have been reported in the literature.…”

mentioning

confidence: 99%

3D multilayered Bi ₄ O ₅ Br ₂ nanoshells displaying excellent visible light photocatalytic degradation behaviour for resorcinol

Deng

et al. 2018

Micro & Nano Letters

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High-ordered three-dimensional multilayered Bi 4 O 5 Br 2 nanoshells have been fabricated successfully via a green ultrasound-assisted anion exchange reaction followed by a calcination treatment approach. The products are characterised by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, UV-vis diffuse reflectance spectrum and N 2 adsorption/desorption isotherms. The results reveal that ternary Bi 4 O 5 Br 2 nanoshells possess a pure monoclinic phase with the average thickness of ca. 12 nm, and the walls are of 10-12 layers constructed by nanograins with 10 nm in size. The specific surface is measured to be 36.18 m 2 g-1 and the band gap energy E g value is calculated to be 2.52 eV. The possible formation process for Bi 4 O 5 Br 2 nanoshells is simply proposed. According to the photocatalytic degradation for resorcinol under visible light irradiation, the as-prepared Bi 4 O 5 Br 2 nanoshells exhibit excellent photocatalytic performance, which is not only far beyond the degradation rate of BiOBr precursor nanosheets but also superior to that of other reported Bi 4 O 5 Br 2 architectures, suggesting a practical application for the treatment of organic pollutants.

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“…Typically, the optical absorption of crystalline semiconductors near the band edge is given by the following equation: αEphoton = K(Ephoton -Eg) n/2 , where K is a constant, α is the absorption coefficient, Ephoton is the discrete photo energy, and Eg is the bandgap energy. The value of n depends on the transition characteristics of the semiconductor (direct transition n = 1 and indirect transition n = 4) [59,11]. Because FeVO4 is a direct-transition semiconductor, its Eg value is determined by the energy intercept of the (αEphoton) 2 vs. Ephoton curve.…”

Section: Photocatalytic Degradation Mechanism Of Semiconductor Photo-fenton-like Synergetic Systemsmentioning

confidence: 99%

Improved visible light photocatalytic activity of mesoporous FeVO4 nanorods synthesized using a reactable ionic liquid

Zeng

Chen

et al. 2019

Chinese Journal of Catalysis

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Mesoporous FeVO4 nanorods were successfully synthesized by calcining the precursor Fe-VO4•1.1H2O nanorods, which were obtained via a simple hydrothermal method in the presence of a reactable metal-ion-containing ionic liquid, 1-octyl-3-methylimidazolium tetrachloride ferrate(III) ([Omim]FeCl4). The structure and morphology of the prepared samples were examined using various characterization techniques. During the synthetic process, [Omim]FeCl4 acted as the solvent, reactant, and capping agent simultaneously. Moreover, the porous FeVO4 nanorods as the heterogeneous photo-Fenton-like semiconductor catalyst for the degradation of tetracycline and rhodamine B under visible light irradiation exhibited excellent photocatalytic activity. This excellent photocatalytic activity of the porous FeVO4 nanorods can be attributed to the synergistic effect of their high electron-hole pair separation rate, suitable band gap structure, and large specific surface area. The possible photocatalytic degradation mechanism of FeVO4/H2O2 photocatalytic systems was also discussed in detail.

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Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A

Cited by 44 publications

References 43 publications

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

3D multilayered Bi ₄ O ₅ Br ₂ nanoshells displaying excellent visible light photocatalytic degradation behaviour for resorcinol

Improved visible light photocatalytic activity of mesoporous FeVO4 nanorods synthesized using a reactable ionic liquid

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Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A

Cited by 44 publications

References 43 publications

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

3D multilayered Bi 4 O 5 Br 2 nanoshells displaying excellent visible light photocatalytic degradation behaviour for resorcinol

Improved visible light photocatalytic activity of mesoporous FeVO4 nanorods synthesized using a reactable ionic liquid

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3D multilayered Bi ₄ O ₅ Br ₂ nanoshells displaying excellent visible light photocatalytic degradation behaviour for resorcinol