Engineering of activated carbon surface to enhance the catalytic activity of supported cobalt oxide nanoparticles in peroxymonosulfate activation

Espinosa, Juan Carlos; Periyaraman, Premkumar Manickam; Bernat-Quesada, Francisco; Sivanesan, S.; Álvaro, Mercedes; Garcı́a, Hermenegildo; Navalón, Sergio

doi:10.1016/j.apcatb.2019.02.043

Cited by 92 publications

(20 citation statements)

References 61 publications

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“…As displayed in Figure c, the removal efficiency of 2,4-D gradually decreased from 100 to 77.9%, and the corresponding k value descended from 3.56 × 10 –1 to 1.93 × 10 –1 min –1 when the initial pH increased from 5 to 11. Currently, the composition of PMS, the surface charge of solid catalysts, and the radical species could be affected by solution pH. , On the one hand, the pH pzc of Ti 3 C 2 T x nanosheets was estimated to be 2.4 (Figure S18), and a negative charge on the surface of catalyst would be detected when exceeding the pH pzc . Therefore, the electrostatic repulsion between the negatively charged Ti 3 C 2 T x monolayer and PMS species would be strengthened with the pH increase, which is unfavorable for the interaction of two reactants.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation

Ding

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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The heterogeneous Fenton-like process is regarded as a promising approach to produce reactive oxygen species for water purification and environmental remediation. Here, we report a simple and rational strategy for the design of an efficient catalyst by reducing the dimensionality instead of changing the composition or structure. Based on theoretical and experimental evidence, considerable active sites were exposed on the low-dimensional Ti3C2T x monolayer surface and showed outstanding reactivity toward peroxymonosulfate activation, which was mainly because of the superior compatibility between the highest occupied molecular orbital of catalysts and lowest unoccupied molecular orbital of Oxone. Stimulated emission depletion super-resolution microscopy innovatively provided visual insights into the spatiotemporal heterogeneous activation process and revealed that the unilaminar Ti3C2T x nanosheet exhibited preferable reaction dynamics relative to its inert bulk counterpart, with an aqueous 2,4-dichlorophenoxyacetic acid degradation rate ∼376 times higher than that when using bulk Ti3C2T x as the activator.

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Section: Resultsmentioning

confidence: 99%

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation

Ding

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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“…Due to the symmetry of the site in copper oxide, the displacement of oxygen atoms contributes to the three active modes, while the atoms of Cu remain constant and ineffective for the Raman modes. The first mode (Ag) located at 286 cm −1 is due to in-phase /out phase rotation [38]. The second and third modes are associated with B1g at 333 cm −1 , and B2g at 617 cm −1 are attributed to bending of CuO, and the symmetric stretching of oxygen, respectively [39,40].…”

Section: Raman Studiesmentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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CuO (S1) Single pure component nanoparticles (SPCNPs), Ag/CuO (S2) binary component hybrid nanoparticles (BCHNPS), Co1/Ag/CuO (S3), and Co2/Ag/CuO (S4) ternary component hybrid nanoparticles (TCHNPS) were synthesized via co-precipitation method. Several spectroscopic methods investigated the characterization of the prepared catalysts. Based on Crystal properties, CuO exhibit a monoclinic phase (tenorite); the grain size of the prepared samples was 28.15 nm, 29.42 nm, 27.86 nm, and 26.67 nm for S1, S2, S3, and S4 respectively. The addition of different content from Co as a dopant to silver decorated CuO gives a clear change to a flake shape. The presence of the IR absorption peaks in the region 400-600 cm −1 matched to the distinctive stretching vibrations of Cu-O bonds in the monoclinic phase structure of CuO. Disappearance of the Raman peaks of CuO and appearing of the new characteristic peaks of cobalt oxide confirms the doping process. Using DRS analysis, arrange of the bandgap values were S1 > S2 > S3 > S4. For the synthetic methyl orange and raw industrial dye, the photodegradation parameters were measured. The results show the excellent activity of Co2/Ag/CuO NPS compared with other samples. Electrical studies of the catalysts show a higher value for the dielectric constant in the higher and lower frequency regions for the sample S4. The hopping process of the charge carrier's improving as a result of the increase of applied field frequency which leads to an increase in the material conductivity.

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“…2f, the activation energy was calculated based on the Arrhenius equation (lnk obs = lnA − E a /RT). The obtained E a was approximately 43 kJ/mol, which was higher than the values (30 and 32 kJ/mol) of phenol degradation achieved by PMS activated by cobalt-functionalised activated carbon, but lower than the value (62.3 kJ/mol) in the PMS/sulfuron-methyl/chloride system (Espinosa et al, 2019;Javier et al, 2018). Peng et al (2018) reported that the E a in the PMS/norfloxacin system was approximately 40.3 kJ/mol.…”

Section: Reaction Temperaturementioning

confidence: 64%

Direct Degradation of Methylene Blue by Unactivated Peroxymonosulfate: Reaction Parameters, Kinetics, and Mechanism

Zuo

Nie²,

Jiang

et al. 2022

Preprint

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Advanced oxidation processes (AOPs) are efficient methods for water purification. However, there are few studies on direct oxidation with inactive peroxymonosulfate (PMS) to remove pollutants. In this study, methylene blue (MB) was oxidised efficiently by PMS. MB was decomposed through a non-radical pathway, as verified by the scavengers and electron paramagnetic resonance experiments. Although singlet oxygen was formed, the possibility of it degrading MB was ruled out via kinetics calculations. Therefore, the obvious conclusion was that PMS reacted directly with MB. Additionally, the operating parameters, including PMS dosage, MB dosage, temperature, and initial pH, were investigated. MB degradation followed pseudo-first-order kinetics, with rate constants ranging from 0.0082 to 0.3912 min−1. The second-order rate constant (kPMS,MB) for the reaction of MB with PMS was 0.08 M−1s−1 at pH 3–6, but kPMS,MB increased dramatically to 4.68 M−1s−1 with increasing solution pH. Chloride in the PMS/MB system reacted with PMS to form HClO, which was catalysed by PMS to rapidly decompose MB. Interestingly, MB is effectively mineralised by PMS in the presence of chlorine. In addition, humic acid, a common scavenger, did not inhibit MB degradation. In an alkaline environment, the removal rate of TOC reached 16%, but PMS caused almost no mineralisation of MB in an acidic environment. This study provides new insights into pollutant removal based on AOPs and an additional strategy for water purification.

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Engineering of activated carbon surface to enhance the catalytic activity of supported cobalt oxide nanoparticles in peroxymonosulfate activation

Cited by 92 publications

References 61 publications

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Direct Degradation of Methylene Blue by Unactivated Peroxymonosulfate: Reaction Parameters, Kinetics, and Mechanism

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Engineering of activated carbon surface to enhance the catalytic activity of supported cobalt oxide nanoparticles in peroxymonosulfate activation

Cited by 92 publications

References 61 publications

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti3C2Tx MXene for Efficient Peroxymonosulfate Activation

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti3C2Tx MXene for Efficient Peroxymonosulfate Activation

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Direct Degradation of Methylene Blue by Unactivated Peroxymonosulfate: Reaction Parameters, Kinetics, and Mechanism

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Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation

Synergistic Features of Superoxide Molecule Anchoring and Charge Transfer on Two-Dimensional Ti₃C₂T_x MXene for Efficient Peroxymonosulfate Activation