Preparation of magnetic core/shell structured γ-Fe2O3@Ti-tmSiO2 and its application for the adsorption and degradation of dyes

Lv, Qiang; Li, Gang; Sun, Hongying; Kong, Lingqian; Lü, Hong; Gao, Xiaoxia

doi:10.1016/j.micromeso.2013.11.028

Cited by 30 publications

(10 citation statements)

References 51 publications

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“…Due to the flexible synthesis method, unique physical properties, easy surface functionalization, and good biocompatibility, mesoporous nanomaterials are increasingly used in adsorption, separation, catalysis, energy storage, and biomedical applications, especially as multi-functional drug delivery carriers for loading various chemical drugs, biomacromolecules, genes, and as a multifunctional diagnostic platform for composite magnetic properties 22–25 . In addition, the heterogeneous catalysts with transition metals improve not only the catalytic performance but also the reaction conditions under the synergistic effect of multimetals 16,20,21,26 .…”

Section: Introductionmentioning

confidence: 99%

Mesoporous bimetallic Fe/Co as highly active heterogeneous Fenton catalyst for the degradation of tetracycline hydrochlorides

Han

et al. 2019

Sci Rep

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Mesoporous bimetallic Fe/Co was prepared as a Fenton-like catalyst to degrade the tetracycline hydrochlorides (TC). The nanocasting strategy with KIT-6 as a hard template was carried out to synthesize the mesoporous bimetallic catalyst. The mesoporous bimetallic Fe/Co catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, and Brunauer-Emmett-Teller (BET) method. The results showed that the catalyst has significant nanofeatures; the surface area, pore size, and particle size were 113.8 m2g−1, 4 nm, and 10 nm, respectively. In addition, the effects of the operating parameters, such as the iron-to-cobalt ratio, pH, H2O2, and initial TC concentrations on its catalytic performance were investigated. The best operating parameters were as follows: iron-to-cobalt ratio = 2:1 to 1:1, pH = 5–9, H2O2: 30 mmol, initial TC less than 30 mg/L. Furthermore, the mesoporous bimetallic Fe/Co showed a good performance for degrading TC, achieving a removal rate of 86% of TC after 3 h under the reaction conditions of H2O2 = 30 mmol, mesoporous bimetallic Fe/Co = 0.6 g/L, TC = 30 mg/L, pH = 7.0, and temperature = 25.5 °C. The mesoporous bimetallic Fe/Co catalyst shows good stability and reusability. This work demonstrated that mesoporous bimetallic Fe/Co has excellent catalytic efficiency, smaller amounts of leached ions, and wider pH range, which enhance its potential applications.

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Section: Introductionmentioning

confidence: 99%

Mesoporous bimetallic Fe/Co as highly active heterogeneous Fenton catalyst for the degradation of tetracycline hydrochlorides

Han

et al. 2019

Sci Rep

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“…Currently, Fe 3 O 4 nanoparticles have attracted considerable attention as adsorbents for wastewater treatment because of their remarkable features of a large specific surface area and facile separation from wastewater by a magnet. [10][11][12][13] It should be additionally emphasized that liquid/solid phase separation using an external magnetic field satisfies the demands of reduced energy consumption and higher separation efficiency especially for nanoscale materials. 14 However, Fe 3 O 4 nanoparticles tend to agglomerate in aqueous solution due to their small size, high surface energy and ferromagnetism, which greatly limits their practical applications.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-rich core/shell magnetic nanostructures for selective adsorption and separation of anionic dyes from aqueous solution

Chen

Liu

Chen

et al. 2016

Environ. Sci.: Nano

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“…Nanocomposites of stable hematite nanoparticles with SiO 2 have also been reported for heterogeneous Fenton-like catalysis. The degradation efficiency was excellent, but the treatment times were too long [23,36]. Compared to the other reported results, the synthesized MIONPs in this work present an excellent peroxidase-like activity in degrading a recalcitrant contaminant at a high concentration.…”

Section: Compounds Detected By Sers In Ar 1 Degradationmentioning

confidence: 65%

Degradation of Acid Red 1 Catalyzed by Peroxidase Activity of Iron Oxide Nanoparticles and Detected by SERS

2021

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Magnetic iron oxide nanoparticles (MIONPs) were synthesized using tannic acid and characterized by Raman, FTIR, UV, and DRX spectroscopy. In a heterogeneous Fenton-like reaction, the catalytic peroxidase-like activity of MIONPs in the degradation of Acid Red 1 (AR 1) dye was investigated. TEM/STEM was used to determine the quasi-spherical morphology and particle size (3.2 nm) of the synthesized MIONPs. The XRD powder patterns were indexed according to the reverse spinel structure of magnetite, and SEM-EDS analysis confirmed their chemical composition. At pH = 3.5, the decomposition of H2O2 in hydroxyl radicals by MIONPs results in high AR 1 degradation (99%). This behavior was attributed to the size and surface properties of the MIONPs. Finally, the Surface Enhanced Raman Spectroscopy (SERS) technique detected intermediary compounds in the degradation process.

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Preparation of magnetic core/shell structured γ-Fe2O3@Ti-tmSiO2 and its application for the adsorption and degradation of dyes

Cited by 30 publications

References 51 publications

Mesoporous bimetallic Fe/Co as highly active heterogeneous Fenton catalyst for the degradation of tetracycline hydrochlorides

Mesoporous bimetallic Fe/Co as highly active heterogeneous Fenton catalyst for the degradation of tetracycline hydrochlorides

Nitrogen-rich core/shell magnetic nanostructures for selective adsorption and separation of anionic dyes from aqueous solution

Degradation of Acid Red 1 Catalyzed by Peroxidase Activity of Iron Oxide Nanoparticles and Detected by SERS

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