Visible-light-driven MIL-53(Fe)/BiOCl composite assisted by persulfate: Photocatalytic performance and mechanism

Miao, Shengchao; Zha, Zhenxing; Liu, Ying; Geng, Xinxiang; Yang, Jiahui; Shen, Chen; Yang, Jing

doi:10.1016/j.jphotochem.2019.111862

Cited by 64 publications

(20 citation statements)

References 67 publications

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“…For pure BiOCl, the peaks at 2θ = 11.8°, 24.16°, 25.94°, 32.61°, 33.51°, 36.59°, 40.96°, 46.72°, 49.80°, 54.20°, 58.72°, 60.68°, 68.13°, 75.06°and 77.80°can be assigned to (011), (002), (101), (110), (102), (030), (112), (200), (113), (211), (212), (114), (220), (214) and (302) crystal planes, respectively, which matched very well with the tetragonal phase of BiOCl (JCPDS Card No. 06-0249) [22]. The characteristic diffraction peaks of MOF-5 matched very well with the simulated MOF-5 crystal [23].…”

Section: Resultssupporting

confidence: 66%

Two‐dimensional composite (BiOCl/GO/MOF‐5) by ultrasonic‐assisted solvothermal synthesis with enhanced photocatalytic activity

Zhai

Chen

et al. 2020

Micro & Nano Letters

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In this work, a novel two-dimensional photocatalyst (BiOCl/GO/MOF-5) was successfully developed by ultrasonic-assisted solvothermal method. X-ray diffraction, scanning electron microscope, Brunauer-Emmett-Teller, UV-visible diffuse reflectance spectrum, photoluminescence and NH 3-TPD were employed to characterise its unique structure and property. The results show that the specific surface area of the two-dimensional composite (205.1 mg 2 •g −1) is significantly higher than single BiOCl (3.14 mg 2 •g −1), which provide much more active site for the photocatalystic process. Also the photocatalytic efficiency could reach to 90.6% that is much higher than pure BiOCl. This could be attributed to the effective electrons-holes separations and proper bandgap to enhance photocatalytic performance. At the same time, the formation mechanism and the possible photocatalytic mechanism of photocatalyst were proposed.

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Section: Resultssupporting

confidence: 66%

Two‐dimensional composite (BiOCl/GO/MOF‐5) by ultrasonic‐assisted solvothermal synthesis with enhanced photocatalytic activity

Zhai

Chen

et al. 2020

Micro & Nano Letters

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“…The absorption edge was observed a red shift compared to the pure BFO. On the basis of UV-vis spectrum, the band gap of a semiconductor can be calculated using the following equation [31,32,33]. αhυ= A (hυ −Eg) n/2 ,where α, hv, A and Eg, are the absorption coefficient, photon energy, a constant and the band gap, respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Activation of Persulfate by Co-Doped Bismuth Ferrite Nanocomposites for Degradation of Levofloxacin Under Visible Light Irradiation

et al. 2019

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In this study, magnetic visible light driven photocatalysts (bismuth ferrite, Bi2Fe4O9, BFO and Co-doped bismuth ferrite, Co-BFO) were successfully prepared by the facile hydrothermal method. The catalyst was used in the application of heterogeneous persulfate (PS) system under visible LED light irradiation for the degradation of levofloxacin (LFX), proving to be an excellent photocatalyst when evaluated by various characterization methods. The effect of Co-doping in the BFO structure was investigated that the decrease of band gap width and the generated photoelectrons and holes would effectively reduce the recombination of photogenerated electron-hole pairs, leading to the enhancement photocatalytic activity. The results demonstrated that Co-BFO catalyst had a high photodegradation efficiency over a wide pH range of 3.0–9.0 and the Co-BFO-2 composite displayed the optimal catalytic performance. It was found that the degradation rate of LFX by Co-BFO-2 catalyst was 3.52 times higher than that of pure BFO catalyst under visible light condition. The free radical trapping experiments and EPR tests demonstrated that superoxide, photogenerated holes and sulfate radicals were the main active species in the photocatalytic degradation of LFX. And a possible photocatalytic degradation mechanism of LFX was proposed in the Vis/Co-BFO/PS process. These findings provided new insight of the mechanism of heterogeneous activation of persulfate by Co-BFO under visible light irradiation.

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“…The detailed morphology of BMF-50 hybrid materials was further obtained via TEM (Fig. S2 † 34,[46][47][48] The SEM and TEM results also prove the successful building of BiOCl/MIL-100(Fe) heterojunctions. The owerlike hierarchical microspheres assembled by thinner nanosheets have the advantage of higher light-harvesting ability and largely expedite the separation of photoinduced carriers, resulting in enhanced photocatalytic activity of BiOBr heterojunctions; moreover, the exposed (110) active crystal facets will play an important role in achieving excellent photocatalytic activity.…”

Section: Characterizationmentioning

confidence: 74%

“…The O1s spectrum of BMF-50 was deconvoluted into four peaks: at 530.1, 531.4, 532.0, and 533.4 eV, which are assigned to the Fe-O and Bi-O bonds, the O atom from terephthalic acid, adsorbed H 2 O or hydroxyl groups on the surface of the hybrids, and oxygen vacancies, respectively. 1,34 As shown in Fig. 3e, the C 1s spectrum featured three peaks, located at 284.3, 285.2, and 288.7 eV, ascribed to C]C, C-O, and C]O bonds of terephthalic acid, respectively.…”

Section: Characterizationmentioning

confidence: 95%

Highly efficient heterogeneous photo-Fenton BiOCl/MIL-100(Fe) nanoscaled hybrid catalysts prepared by green one-step coprecipitation for degradation of organic contaminants

Jiang

Tian

et al. 2021

RSC Adv.

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Visible-light-driven MIL-53(Fe)/BiOCl composite assisted by persulfate: Photocatalytic performance and mechanism

Cited by 64 publications

References 67 publications

Two‐dimensional composite (BiOCl/GO/MOF‐5) by ultrasonic‐assisted solvothermal synthesis with enhanced photocatalytic activity

Two‐dimensional composite (BiOCl/GO/MOF‐5) by ultrasonic‐assisted solvothermal synthesis with enhanced photocatalytic activity

Enhanced Activation of Persulfate by Co-Doped Bismuth Ferrite Nanocomposites for Degradation of Levofloxacin Under Visible Light Irradiation

Highly efficient heterogeneous photo-Fenton BiOCl/MIL-100(Fe) nanoscaled hybrid catalysts prepared by green one-step coprecipitation for degradation of organic contaminants

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