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 466 publications

(82 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

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

Cited by 466 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

Contact Info

Product

Resources

About