Monodispersed CuFe2O4 nanoparticles anchored on natural kaolinite as highly efficient peroxymonosulfate catalyst for bisphenol A degradation

Dong, Xiongbo; Ren, Bangxing; Sun, Zhiming; Li, Chunquan; Zhang, Xiangwei; Kong, Minghao; Zheng, Shuilin; Dionysiou, Dionysios D.

doi:10.1016/j.apcatb.2019.04.052

Cited by 446 publications

(82 citation statements)

References 62 publications

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“…The O 1s spectrum was revealed in the water adsorbed on the catalyst surface was partially converted to -OH, while the composition variation was not significant. According to the above results and previous researchers, the reaction mechanism was proposed for PS activation by CuFe 2 O 4 /MMT-k10 (reactions (1-11)) [50][51][52][53], and the concept map of the proposed mechanism is shown in Figure S6. Firstly, SO 4…”

Section: Ho• and Sosupporting

confidence: 52%

Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism

Yang

Huang

Wang

et al. 2020

Water

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In this study, a magnetic copper ferrite/montmorillonite-k10 nanocomposite (CuFe2O4/MMT-k10) was successfully fabricated by a simple sol-gel combustion method and was characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), the Brunner–Emmett–Teller (BET) method, vibrating sample magnetometer (VSM), and X-ray photoelectron spectroscopy (XPS). For levofloxacin (LVF) degradation, CuFe2O4/MMT-k10 was utilized to activate persulfate (PS). Due to the relative high adsorption capacity of CuFe2O4/MMT-k10, the adsorption feature was considered an enhancement of LVF degradation. In addition, the response surface methodology (RSM) model was established with the parameters of pH, temperature, PS dosage, and CuFe2O4/MMT-k10 dosage as the independent variables to obtain the optimal response for LVF degradation. In cycle experiments, we identified the good stability and reusability of CuFe2O4/MMT-k10. We proposed a potential mechanism of CuFe2O4/MMT-k10 activating PS through free radical quenching tests and XPS analysis. These results reveal that CuFe2O4/MMT-k10 nanocomposite could activate the persulfate, which is an efficient technique for LVF degradation in water.

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Section: Ho• and Sosupporting

confidence: 52%

Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism

Yang

Huang

Wang

et al. 2020

Water

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“…More adsorbent dosages would provide more adsorption sites, whereas excess adsorbent probably induced the diffusion limitation phenomenon in heterogeneous reactions, similar to previous studies. 36 − 38 …”

Section: Resultsmentioning

confidence: 99%

Simultaneous Oxidation and Sequestration of Arsenic(III) from Aqueous Solution by Copper Aluminate with Peroxymonosulfate: A Fast and Efficient Heterogeneous Process

Liu

Yang

et al. 2021

ACS Omega

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The major problem in arsenic (As(III)) removal using adsorbents is that the method is time-consuming and inefficient owing to the fact that most of the adsorbents are more effective for As(V). Herein, we report a new discovery regarding the significant simultaneous oxidation and sequestration of As(III) by a heterogeneous catalytic process of copper aluminate (CuAl 2 O 4 ) coupled with peroxymonosulfate (PMS). Oxidation and adsorption promote each other. With the help of the active radicals, the As(III) removal efficiency can be increased from 59.4 to 99.2% in the presence of low concentrations of PMS (50 μM) and CuAl 2 O 4 (300 mg/L) in solution. CuAl 2 O 4 /PMS can work effectively in a wide pH range (3.0−9.0). Other substances, such as nitrate, sulfate, chloride, carbonate, and humic acid, exert an insignificant effect on As(III) removal. Based on X-ray photoelectron spectroscopy (XPS) analysis, the exposed reductive copper active sites might drive the redox reaction of Cu(II)/Cu(I), which plays a key role in the decomposition of PMS and the oxidation of As(III). The exhausted CuAl 2 O 4 could be refreshed for cycling runs with insignificant capacity loss by the combined regeneration strategy because of the stable spinel structure. According to all results, the CuAl 2 O 4 /PMS with favorable oxidation ability and stability could be employed as a promising candidate in real As(III)-contaminated groundwater treatment.

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“…In the spectrum of Cu 2p 3/2 , the peak at ≈936 eV was assigned to Cu 2+ in the spinel, accompanied by the characteristic Cu 2+ shakeup satellite peaks at 938−948 eV, while the peak at ≈933 eV suggested the presence of Cu + and/or Cu 0 species. Because Cu 2p 3/2 XPS cannot differentiate between Cu + and Cu 0 , Auger Cu LMM spectra were further recorded, and the results confirmed the presence of Cu + at ≈570 eV, while Cu 0 at 565.6 eV [29][30][31], meaning that Cu 2+ species were partially reduced during the course of immobilization.…”

Section: Characterization Of the Prepared Materialsmentioning

confidence: 90%

A novel and robust heterogeneous Cu catalyst using modified lignosulfonate as support for the synthesis of nitrogen-containing heterocycles

Lai

Liu

et al. 2020

Beilstein J. Org. Chem.

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A waste biomass, sodium lignosulfonate, was treated with sodium 2-formylbenzenesulfonate, and the phenylaldehyde condensation product was then used as a robust supporting material to immobilize a copper species. The so-obtained catalyst was characterized by many physicochemical methods including FTIR, EA, FSEM, FTEM, XPS, and TG. This catalyst exhibited excellent catalytic activity in the synthesis of nitrogen-containing heterocycles such as tricyclic indoles bearing 3,4-fused seven-membered rings, 2‑arylpyridines, aminonaphthalenes and 3-phenylisoquinolines. In addition, this catalyst showed to be recyclable and could be reused several times without significant loss in activity during the course of the reaction process.

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Monodispersed CuFe2O4 nanoparticles anchored on natural kaolinite as highly efficient peroxymonosulfate catalyst for bisphenol A degradation

Cited by 446 publications

References 62 publications

Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism

Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism

Simultaneous Oxidation and Sequestration of Arsenic(III) from Aqueous Solution by Copper Aluminate with Peroxymonosulfate: A Fast and Efficient Heterogeneous Process

A novel and robust heterogeneous Cu catalyst using modified lignosulfonate as support for the synthesis of nitrogen-containing heterocycles

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