Fe3O4@SiO2 nanoparticles as a high-performance Fenton-like catalyst in a neutral environment

Yang, Shengrong; Zhang, Wu; Xie, Jingru; Long, Rong; Zhang, Xiaoliang; Yu, Baowei; Wu, Ruihan; Liu, Xiaoyang; Li, Hongliang; Guo, Zhen

doi:10.1039/c4ra10207j

Cited by 72 publications

(27 citation statements)

References 29 publications

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“…It was found that the removal efficiency of TC increases from 76.5 to 94% within 240 min reaction when the H 2 O 2 concentration increases from 20 mM to 80 mM. These findings are in good agreement with those of previously conducted studies 27,31 . It shows that TC removal is directly related to the concentration of HO• produced by the catalytic decomposition of H 2 O 2 .…”

Section: Effect Of H 2 O 2 Concentrationsupporting

confidence: 91%

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

et al. 2015

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In this work, we prepared and used a composite of powder activate carbon/Fe 3 O 4 magnetic nanoparticles (PAC/Fe 3 O 4 MNPs) as a heterogeneous catalyst to remove tetracycline (TC) from aqueous solution. By using XRD, BET, VSM, SEM, TEM and EDX techniques, also, we tried to characterize the catalyst. The effects of pH, H 2 O 2 , catalyst dosages and also initial TC concentration on the degradation process were assessed. Based on the results, it was indicated that at low pH values and initial TC concentrations, the efficiency of the process is higher than the other values and concentrations studied in this work. Under the ambient conditions and setting the initial pH value and TC concentration at respectively 3.0±0.2 and 10 mg/L, the optimal dosage of reagents were recorded to be 0.3 g/L catalyst and 80.0 mM H 2 O 2 . The values of observed rate constants, k obs , increased by increasing the catalyst loading in the system; however, these values decreases when the initial TC concentration was increased. Our findings indicated that all of TC concentration was nearly degraded during the 180 min reaction. Regarding the reusability of PAC/Fe 3 O 4 MNPs, the results showed that TC and TOC removal efficiencies of 94.5% and 32.3%, respectively, can be achieved after four consecutive runs. By conducting the stability experiments, it was confirmed that PAC/Fe 3 O 4 MNPs is a promising and effective catalyst in Fenton reactions and can be used to treat TCcontaminated water with very low loss of catalytic activity.

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Section: Effect Of H 2 O 2 Concentrationsupporting

confidence: 91%

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

et al. 2015

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“…The kinetics of the FTCNC-H2O2-MB system was competitive with other systems using various nanocatalysts. For example, the Fe3O4@SiO2-H2O2-MB system had a k value of 0.020 min −1 [7]. The k values of the FePt-H2O2-MB system were in the range of 0.0033-0.023 min −1 at the pH value of 5.5 [20].…”

Section: Decoloration Of Mb In the Ftcnc-h 2 O 2 Fenton-like Systemmentioning

confidence: 90%

“…Typically, heterogeneous Fenton-like catalysts are microsized or nanosized and contain Fe or other metal elements, where the surface metal atoms catalyze the decomposition of H 2 O 2 . Many heterogeneous catalysts have been reported to catalyze the decomposition of H 2 O 2 for water treatment [6][7][8][9][10][11][12]. Both iron-containing and iron-free catalysts have been studied, and external energy supply (e.g., sonication [13,14], electricity [2] and light irradiation [9,[15][16][17]) is adopted in many cases to enhance the performance of heterogeneous catalysis.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Liu

Zhang

et al. 2016

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Abstract:Fe 2+ -H 2 O 2 Fenton system is widely applied in water treatment nowadays, but the acidification and sludge generation are crucial problems to be solved. Herein, we report that Fe 3 O 4 /TiO 2 /C nanocomposites (FTCNCs) were able to catalyze the decomposition of H 2 O 2 at neutral pH and can be applied in dye decoloration. FTCNCs were prepared by precipitating TiO 2 on Fe 3 O 4 cores via the hydrolysis of tetrabutyl titanate followed by the hydrothermal dehydrogenization of glucose to deposit carbon on Fe 3 O 4 /TiO 2 . The decoloration of methylene blue (MB) in the FTCNC-H 2 O 2 Fenton-like system was monitored to reflect the catalytic activity of FTCNC. The radical generation capability was analyzed by electron spin resonance. Our results indicated that FTCNC-H 2 O 2 Fenton-like system was efficient in decolorizing MB, and the radicals led to the near complete oxidation of MB. The FTCNC-H 2 O 2 Fenton-like system could be used in a wide pH range of 4-9. A greater catalyst amount, a higher H 2 O 2 concentration, and a higher temperature accelerated the decoloration kinetics. FTCNCs showed good activity after the regeneration of 8 cycles. The implication to the practical applications of FTCNCs in water treatment is discussed.

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“…While the other three systems exhibited lower degradation efficiencies within the same time frame at 13.88 %, 32.38 % and 20.24 % for H 2 O 2 , Fe 3 O 4 @SiO 2 and Fe 3 O 4 ‐H 2 O 2 systems, respectively. The low degradation efficiencies observed in these systems is mainly caused by the near neutral pH and lack of external energy [12,36] . The effectiveness of the Fe 3 O 4 @SiO 2 nano‐catalysts in degradation of the malachite green dye was further confirmed by the evaluation of the degradation kinetics using the equation (2).…”

Section: Resultsmentioning

confidence: 90%

“…In this AOPs, highly reactive radicals are produced which then helps in oxidizing the organic pollutants [11] . Unlike the traditional activated sludge process, AOP's can handle a wide variety of pollutants and are now readily being employed in both laboratory and industrial scale [12] . Of the several possible routes for AOP, fenton reaction is the mostly widely deployed method which involves the decomposition of H 2 O 2 to hydroxyl and hydroperoxyl radicals in presence of Fe 2+ ions [13] .…”

Section: Introductionmentioning

confidence: 99%

Effective Heterogeneous Fenton‐Like degradation of Malachite Green Dye Using the Core‐Shell Fe₃O₄@SiO₂Nano‐Catalyst

et al. 2021

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In this study, the application of the core-shell Fe 3 O 4 @SiO 2 nanocatalysts for fenton-like degradation of malachite green dye has been presented. The nano-catalysts were prepared using a combination of solvothermal and sol-gel techniques and characterized using XRD, FTIR, SEM/EDX, TEM and VSM techniques. The effects of various reaction parameters on the degradation of malachite green dye using the prepared nanocatalysts were investigated. The optimal condition for pH, catalyst dosage and H 2 O 2 amount were found to be at 6.7, 15 mg and 50 μL, respectively. Under the optimized conditions, a degradation efficiency of 96.18 % for malachite green dye was achieved using the catalyst within 30 minutes at 303 K with a pseudo first order rate constant of 0.1102 min À 1. The plausible mechanism for MG degradation was determined to be the combination of adsorption and simultaneous decomposition via formation of hydroxyl radicals. The performance of the nano-catalyst was compared with other fenton-like catalysts reported in the literature. Finally, the magnetic properties of the Fe 3 O 4 @SiO 2 catalysts was utilized for its successful recovery and application in multiple degradation cycles.

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Fe₃O₄@SiO₂ nanoparticles as a high-performance Fenton-like catalyst in a neutral environment

Abstract: Fe3O4@SiO2 could be used as high-performance Fenton-like catalyst for dye decoloration in neutral environment.

Cited by 72 publications

References 29 publications

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Effective Heterogeneous Fenton‐Like degradation of Malachite Green Dye Using the Core‐Shell Fe₃O₄@SiO₂Nano‐Catalyst

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Fe3O4@SiO2 nanoparticles as a high-performance Fenton-like catalyst in a neutral environment

Abstract: Fe3O4@SiO2 could be used as high-performance Fenton-like catalyst for dye decoloration in neutral environment.

Cited by 72 publications

References 29 publications

Powder activated carbon/Fe3O4 hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Powder activated carbon/Fe3O4 hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Effective Heterogeneous Fenton‐Like degradation of Malachite Green Dye Using the Core‐Shell Fe3O4@SiO2Nano‐Catalyst

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Fe₃O₄@SiO₂ nanoparticles as a high-performance Fenton-like catalyst in a neutral environment

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Powder activated carbon/Fe₃O₄ hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

Effective Heterogeneous Fenton‐Like degradation of Malachite Green Dye Using the Core‐Shell Fe₃O₄@SiO₂Nano‐Catalyst