Core-shell magnetic Fe3O4@Zn/Co-ZIFs to activate peroxymonosulfate for highly efficient degradation of carbamazepine

Wu, Zelin; Wang, Yupeng; Xiong, Zhaokun; Ao, Zhimin; Pu, Shengyan; Yao, Gang; Lai, Bo

doi:10.1016/j.apcatb.2020.119136

Cited by 565 publications

(93 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The X-ray diffraction (XRD) patterns of the as-synthesized adsorbents were recorded in Figure 2 a, which determined the crystalline structure and main phase of the composites. Similar peaks of Fe 3 O 4 and Fe 3 O 4 @PB at 2 θ 18.29, 30.14, 35.49, 37.14, 43.13, 53.52, 57.04, and 62.64° were indexed as (111), (220), (311), (222), (400), (422), (511), and (440) planes, respectively, well-matched with the previous researches [ 42 , 43 ]. Besides, Fe 3 O 4 @PB displays four predominant 2θ peaks compared with Fe 3 O 4 in the range of 17–40° corresponding to the Bragg planes of (200), (220), (400), and (420) [ 44 ], which belong to the face-centered cubic lattice structure of PB.…”

Section: Resultssupporting

confidence: 89%

Removal of Cd(II) from Micro-Polluted Water by Magnetic Core-Shell Fe3O4@Prussian Blue

et al. 2021

View full text Add to dashboard Cite

A novel core-shell magnetic Prussian blue-coated Fe3O4 composites (Fe3O4@PB) were designed and synthesized by in-situ replication and controlled etching of iron oxide (Fe3O4) to eliminate Cd (II) from micro-polluted water. The core-shell structure was confirmed by TEM, and the composites were characterized by XRD and FTIR. The pore diameter distribution from BET measurement revealed the micropore-dominated structure of Fe3O4@PB. The effects of adsorbents dosage, pH, and co-existing ions were investigated. Batch results revealed that the Cd (II) adsorption was very fast initially and reached equilibrium after 4 h. A pH of 6 was favorable for Cd (II) adsorption on Fe3O4@PB. The adsorption rate reached 98.78% at an initial Cd (II) concentration of 100 μg/L. The adsorption kinetics indicated that the pseudo-first-order and Elovich models could best describe the Cd (II) adsorption onto Fe3O4@PB, indicating that the sorption of Cd (II) ions on the binding sites of Fe3O4@PB was the main rate-limiting step of adsorption. The adsorption isotherm well fitted the Freundlich model with a maximum capacity of 9.25 mg·g−1 of Cd (II). The adsorption of Cd (II) on the Fe3O4@PB was affected by co-existing ions, including Cu (II), Ni (II), and Zn (II), due to the competitive effect of the co-adsorption of Cd (II) with other co-existing ions.

show abstract

Section: Resultssupporting

confidence: 89%

Removal of Cd(II) from Micro-Polluted Water by Magnetic Core-Shell Fe3O4@Prussian Blue

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The diffraction pattern for Fe 3 O 4 @ZIF-8@ZIF-67 had eight main peaks of ZIF-8@ZIF-67 (Fig. 3b) at ~ 10.1°, 13.2°, 14.5°, 16.4°, 18.1°, 19.6°, 26.1°, 27.9°, and 29.2°, which agrees with the results in the literature (Wu et al, 2020). Characteristic peaks were visible at 30.0°, 35.6°, 43.4°, 53.7°, 57.2°, and…”

Section: Characterizationsupporting

confidence: 89%

Synthesis of Magnetic Nanocomposite Fe3O4@ZIF-8@ZIF-67 and Removal of Tetracycline in Water

Fang

et al. 2021

Preprint

View full text Add to dashboard Cite

We prepared a double-layer magnetic nanocomposite Fe3O4@ZIF-8@ZIF-67 by layer-by-layer self-assembly. Fe3O4@ZIF-8@ZIF-67 was used to remove tetracycline from aqueous solution via a combination of adsorption and Fenton-like oxidation. Depending on the outstanding porous structure of the Fe3O4@ZIF-8@ZIF-67, a high adsorption capacity for tetracycline was 356.25 mg g− 1, with > 95.47% removal efficiency within 100 min based on Fenton-like oxidation. To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe3O4@ZIF-8@ZIF-67 before and after removal of tetracycline. Scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) all supported adsorption and Fenton oxidation of tetracycline. This study extends the application of Fe3O4@ZIF-8@ZIF-67 for environmental remediation.

show abstract

“…Furthermore, decreasing of particle size and increasing of their surfaces are very useful for biological and medical applications. In contrast, when particles size is decreased less than 10 nanometers (for many of materials), the crystallinity of particles is also decreased, so the amount of saturation magnetization is dropped off [44].…”

Section: Particle Size Distributionmentioning

confidence: 99%

Evaluation of New Properties of Calcined Magnetite Doped with Zinc and Lanthanum Nanoparticles Prepared in Oxygen and Nitrogen Atmospheres

Zayed¹,

Mubarak²,

Abdel-maksoud³

2021

Preprint

View full text Add to dashboard Cite

The aim of the present research is the preparation of magnetite nanoparticles doped with Zn and La of the general formula ZnLa(x)Fe(3-x)O4 where x =0.0, 0.1, 0.15, 0.2, 0.25 and 0.3; which were prepared via co-precipitation method, separated and calcined at 800oC under oxygen and nitrogen atmospheres. The stoichiometric ratios of the elements in the given general formula had been proved and confirmed by elemental analyses using XRF. Various techniqueshave been used to analyze the prepared nanoparticles. X-ray diffraction (XRD) confirmed the formation of one single phase of nanoparticles components with average crystalline size ranged from 6 to 9 nm at oxygen atmosphere and from 6 to 8 at nitrogen atmosphere.These size values had been calculated by Debye-Scherrer equation. The optical properties carried out by Cary Eclipse fluorescence spectrophotometer.The morphology of the prepared magnetite nanoparticles was studied using field emission scanning electron microscope (FE-SEM) and high-resolution transmission electron microscope (HRTEM). Optical properties were demonstrated by UV–visible–NIR spectrophotometer. The high absorbance values of Zn La(x)Fe(3-x)O4 were found to 80-97 and 80-99 % in the visible wavelength range of 400-800 nm for the prepared samples in presence of O2 and N2 gas at room temperature, respectively. These proved the lower values of energy band gap in both conditions. The lowering of energy band gap of 1.89 eV for nanoparticles prepared in O2 gas and 1.78 eV for prepared in N2 gas in most samples may be attributed to incorporation of Zn cation. These results are confirmed by photo luminscence spectra (PL) measurements of the prepared samples. Magnetic properties of the given samples obtained from vibrating sample magnetometer (VSM);showed that most of these samples exhibited almost superparamagnetic behavior. These magnetic values (32.87 and 24.79 emu/g) infer super saturation magnetization of the given samples prepared in O2 and N2 gas at room temperature, respectively. Examination of the magnetic properties revealed decrease in saturation magnetization with increasing La ion concentrations incorporation up to x = 0.3. The evaluated magnetic and optical properties of the novel prepared ZnLa(x)Fe(3-x)O4nano-materials revealed their possible use in different industrial fields like bio-applications, in electronic components, cosmetics, antibacterial agents, and in solar cells. The antibacterial activity study of the prepared NPs revealed them highly efficient against different kinds of bacteria that increase with increase of La % doped in their entity.

show abstract

Core-shell magnetic Fe3O4@Zn/Co-ZIFs to activate peroxymonosulfate for highly efficient degradation of carbamazepine

Cited by 565 publications

References 69 publications

Removal of Cd(II) from Micro-Polluted Water by Magnetic Core-Shell Fe3O4@Prussian Blue

Removal of Cd(II) from Micro-Polluted Water by Magnetic Core-Shell Fe3O4@Prussian Blue

Synthesis of Magnetic Nanocomposite Fe3O4@ZIF-8@ZIF-67 and Removal of Tetracycline in Water

Evaluation of New Properties of Calcined Magnetite Doped with Zinc and Lanthanum Nanoparticles Prepared in Oxygen and Nitrogen Atmospheres

Contact Info

Product

Resources

About