CuO and CeO2 assisted Fe2O3/attapulgite catalyst for heterogeneous Fenton-like oxidation of methylene blue

Zhang, Ting; Dong, Lijie; Du, Jianhua; Qian, Chunyuan; Wang, Yi

doi:10.1039/d0ra03754k

Cited by 14 publications

(5 citation statements)

References 51 publications

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“…It can be seen from Figure 1a that all samples showed diffraction peaks at 2θ of 8.5°, 19.5°, 27.8°, 34.7°, and 35.4°, corresponding to the diffraction peaks of attapulgite crystal structure, indicating that ATP's crystal structure was not damaged when CTS and metal oxides were introduced into ATP while the disorder degree of ATP crystal increased due to the changes of basal peaks. The diffraction peaks at 2θ of 24.2°, 33.2°, 40.9°, 49.6°, and 54.2° belong to Fe2O3 [41], and the diffraction peaks of 35.6°, 38.7°, 49.1°, 53.5°, 58.3°, and 65.9° are characteristic peaks of CuO [41,42]. These indicate that the metal oxides are successfully loaded on the surface of CTS-ATP.…”

Section: Characterization Of Samplesmentioning

confidence: 83%

Preparation of a Heterogeneous Catalyst CuO-Fe2O3/CTS-ATP and Degradation of Methylene Blue and Ciprofloxacin

Zhang

Guo

et al. 2022

Coatings

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A heterogeneous particle catalyst (CuO-Fe2O3/CTS-ATP) was synthesized via injection molding and ultrasonic immersion method, which is fast and effective. The particle catalyst applied attapulgite (ATP) wrapped by chitosan (CTS) as support, which was loaded dual metal oxides CuO and Fe2O3 as active components. After a series of characterizations of catalysts, it was found that CuO and Fe2O3 were successfully and evenly loaded on the surface of the CTS-ATP support. The catalyst was used to degrade methylene blue (MB) and ciprofloxacin (CIP), and the experimental results showed that the degradation ratios of MB and CIP can reach 99.29% and 86.2%, respectively, in the optimal conditions. The degradation mechanism of as-prepared catalyst was analyzed according to its synthesis process and ∙OH production, and the double-cycle catalytic mechanism was proposed. The intermediate products of MB and CIP degradation were also identified by HPLC-MS, and the possible degradation pathways were put forward.

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Section: Characterization Of Samplesmentioning

confidence: 83%

Preparation of a Heterogeneous Catalyst CuO-Fe2O3/CTS-ATP and Degradation of Methylene Blue and Ciprofloxacin

Zhang

Guo

et al. 2022

Coatings

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“…These results indicate that the Cu NCs/HAp nanocatalyst is stable and does not pose severe metal pollution problems. The catalytic activity of Cu NCs/HAp was also compared with other Cu-based catalysts reported in the literature, − and the results are summarized in Table . It could be seen that the Cu NCs/HAp nanocatalyst exhibited better or equivalent catalytic activity compared with other Cu-based heterogeneous catalysts.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Fenton-like Degradation of Organic Pollutants at Neutral pH by Multivalent Cu NCs/HAp Nanocatalysts

Yang,

Zhang,

Jiang

et al. 2023

Langmuir

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Heterogeneous Fenton-like catalysis is a widely used method for the degradation of organic pollutants. However, it still has some limitations such as low activity in the neutral condition, low conversion rates of metals with different valence states, and potential secondary metal pollution. In this study, a Fenton-like nanocatalyst was first created by generating ultrasmall copper nanoclusters (Cu NCs) on the surface of hydroxyapatite (HAp) through a process of doping followed by modification. This resulted in the formation of a composite nanocatalyst known as Cu NCs/HAp. With the help of hydrogen peroxide (H 2 O 2 ), Cu NCs/HAp exhibits an outstanding Fenton-like catalytic performance by efficiently degrading organic dyes such as methylene blue under mild neutral conditions. The removal rate can reach over 83% within just 30 min, demonstrating ideal catalytic universality and stability. The improved Fentonlike catalytic performance of Cu NCs/HAp can be ascribed to the synergistic effect of the multivalent Cu species through two simultaneous reaction pathways. During route I, the embedded Cu NCs with a core−shell Cu 0 /Cu + structure can undergo sequential oxidation to form Cu 2+ , which continuously activates H 2 O 2 to generate hydroxyl radicals ( • OH) and singlet oxygen ( 1 O 2 ). In route II, Cu 2+ produced from route I and initially adsorbed on the surface of HAp can be reduced by H 2 O 2 , thus regenerating Cu + species for route I and achieving a closed-loop reaction. This work has confirmed that Cu NCs loaded on HAp may be an alternative Fenton-like catalyst for degradation of organic pollutants and environmental remediation, opening up new avenues for potential applications of other Cu NCs in future water pollution control.

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“…3 ATP modification by carbon-based materials (left) [95][96][97]101,118,119 and by metal or metal oxides (right). 109,[113][114][115]120,121 Copyright 2024, Elsevier. method (366.0 mg g −1 ) and by hydrothermal method (271.8 mg g −1 ).…”

Section: Modication Attapulgite By Carbon-based Materialsmentioning

confidence: 99%

“…Multiple metal oxide combinations can take an effect of synergistic oxidation. Zhang et al 114 prepared multi-metal oxides loaded catalysts (CuO–Fe 2 O 3 /ATP, CeO 2 –Fe 2 O 3 /ATP and CuO–CeO 2 –Fe 2 O 3 /ATP) by impregnation method with CuO, CeO 2 or Fe 2 O 3 directly coated on ATP surface for the degradation of MB. Under the optimum conditions, the as-synthesized three catalysts all showed more than 99% degradation efficiency of MB.…”

Section: Modifications Of Attapulgite and Their Utilizations In Treat...mentioning

confidence: 99%

Recent developments in synthesis of attapulgite composite materials for refractory organic wastewater treatment: a review

Zhang,

Huang,

Qiao

et al. 2024

RSC Adv.

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CuO and CeO₂ assisted Fe₂O₃/attapulgite catalyst for heterogeneous Fenton-like oxidation of methylene blue

Abstract: A novel heterogeneous catalyst CuO–CeO2–Fe2O3/ATP was synthesized for MB degradation and the catalytic mechanism was put forward.

Cited by 14 publications

References 51 publications

Preparation of a Heterogeneous Catalyst CuO-Fe2O3/CTS-ATP and Degradation of Methylene Blue and Ciprofloxacin

Preparation of a Heterogeneous Catalyst CuO-Fe2O3/CTS-ATP and Degradation of Methylene Blue and Ciprofloxacin

Enhancing Fenton-like Degradation of Organic Pollutants at Neutral pH by Multivalent Cu NCs/HAp Nanocatalysts

Recent developments in synthesis of attapulgite composite materials for refractory organic wastewater treatment: a review

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