Shaddock peels derived multilayer biochar with embedded CoO@Co nanoparticles for peroxymonosulfate based wastewater treatment

Zeng, Qingyi; Yang, Liu; Zhang, Qingyan; Cai, Tao; Wang, Yumei; Cao, Yuhan; Lv, Junwen; Xiong, Zhu; Wu, Suqing; Oh, Rena

doi:10.1016/j.chemosphere.2023.138398

Cited by 31 publications

(10 citation statements)

References 48 publications

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“…Electron paramagnetic resonance (EPR) was further applied to identify the generated ROS, and 5,5-dimethyl-1-pyrroline- N -oxide (DMPO) and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMP) were used as trapping agents for EPR tests. − As shown in Figure e, no obvious DMPO-•OH DMPO-SO 4 •– and DMPO-O 2 •– signals were detected, which demonstrated that a limited amount of •OH, SO 4 •– , and O 2 •– was generated in the 3D-MNSN-CF/PMS system. − However, a sharp signal of TEMP- 1 O 2 was obviously detected. Based on the results of quenching experiments, it can be concluded that 1 O 2 is the main ROS for oxidizing TC, which means the 3D-MNSN-CF/PMS system possesses a typical nonradical process during the TC degradation. , …”

Section: Resultsmentioning

confidence: 99%

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Zhang

et al. 2023

ACS Appl. Nano Mater.

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The development of highly efficient fixed catalysts is a significant concern in practical wastewater treatment using the peroxymonosulfate (PMS)-based Fenton-like process. In this study, we successfully synthesized a three-dimensional (3D) δ-MnO 2 nanosheet (MNSN) net grown on a carbon-fiber (CF) sheet (3D-MNSN-CF) through a simple hydrothermal strategy. This novel catalyst demonstrated exceptional efficiency and stability in activating PMS for degrading refractory organics. The 3D-MNSN-CF catalyst was composed of wrinkled, ultrathin δ-MnO 2 nanosheets (∼4.3 nm) grown on CF, forming a uniform 3D net structure with a covering thickness of approximately 7.6 μm (mass ratio ∼ 2.17%). This unique morphology provided a fixed Mn-based catalyst with a highly exposed (001) facet, intrinsic Mn 3+ /Mn 4+ redox pair, and a high ratio of oxygen vacancies (O V s). These features enabled the 3D-MNSN-CF/PMS system to exhibit a remarkable removal ratio of approximately 100% for tetracycline hydrochloride (TC) degradation. The system also showed a high rate constant (k value) of approximately 0.15 min −1 and a specific activity (ε) of 3.46 L min −1 g −1 based on the MnO 2 ratio, surpassing many reported Mn-based catalysts. Moreover, the 3D-MNSN-CF catalyst maintained excellent performance over a wide pH range from 2 to 11. Furthermore, we discovered that electron-rich oxygen-containing groups exhibited an inhibition effect by competing adsorption with PMS, hindering the generation of radicals. Additionally, the results indicated that singlet oxygen ( 1 O 2 ) was the main reactive species responsible for TC removal, while only a small amount of radicals contributed to the process. The catalyst's excellent performance was also demonstrated in treating various refractory organics and real wastewater, and it exhibited splendid stability for recycling use.

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Section: Resultsmentioning

confidence: 99%

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Zhang

et al. 2023

ACS Appl. Nano Mater.

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“…217 Particularly, PMS with unique structures and chemical properties can be activated efficiently by certain catalysts (Fe-, Co-and Cu-based nanozymes) to produce ROS. [218][219][220][221] These ROS often determine the degradation of organic pollutants. 216,[222][223][224] Huang's group studied the degradation ability of the FeBi-NC + PMS system for rhodamine B (RhB).…”

Section: Degradation Of Organic Dyesmentioning

confidence: 99%

Nanozymes: powerful catalytic materials for environmental pollutant detection and degradation

Diao,

Chen,

Tang

et al. 2024

Environ. Sci.: Nano

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“…Due to the electron spin-orbit coupling effect, the p-orbital electron energy levels are split. The p subshell layer of the Co2p spectrum exhibits a double-structured peak consisting of a high-energy band (Co2p1/2) and a low-energy band (Co2p3/2) [33] ; [64]. The s orbitals do not undergo spin-orbit splitting of the electrons, and thus both C1s and O1s show single peaks.…”

Section: Practicability Of Coo/spc Processmentioning

confidence: 99%

Degradation of Anthraquinone Dye Wastewater by Sodium Percarbonate with CoO Heterogeneous Activation

Fan,

Xia,

Sun

et al. 2024

Preprint

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In this work, the optimal efficiency and mechanism of action of CoO activated sodium percarbonate (SPC) for the degradation of Reactive Blue 19 was investigated. The three-factor interaction of SPC concentration, CoO dosage and initial pH and the effects of factors such as anions and humic acids (HA) were investigated. The results show that the CoO/SPC system (93.8%, 0.01015 min− 1) efficiently degraded RB19 and was also suitable for other organic dyes (32.7%~100%) and antibiotics (97.1%~100%). During the activation of SPC by CoO, carbonate radical (CO3•−), hydroxyl radical (•OH), superoxide radical (O2•−) and singlet oxygen (1O2) are involved in the degradation process, among which CO3•− (88.2%) plays an indispensable role, which was proved by quenching experiments and electron paramagnetic resonance (EPR) tests. Co2+ dissolution was lower than 150 µg/L, which meets the emission standard (1 ppm); the application of SPC avoids the problem of acidification of the wastewater, and the final product is green in color. This study presents a novel approach to treating dye wastewater by combining transition metal oxides with sodium percarbonate.

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Shaddock peels derived multilayer biochar with embedded CoO@Co nanoparticles for peroxymonosulfate based wastewater treatment

Cited by 31 publications

References 48 publications

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Nanozymes: powerful catalytic materials for environmental pollutant detection and degradation

Degradation of Anthraquinone Dye Wastewater by Sodium Percarbonate with CoO Heterogeneous Activation

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Shaddock peels derived multilayer biochar with embedded CoO@Co nanoparticles for peroxymonosulfate based wastewater treatment

Cited by 31 publications

References 48 publications

MnO2 Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

MnO2 Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Nanozymes: powerful catalytic materials for environmental pollutant detection and degradation

Degradation of Anthraquinone Dye Wastewater by Sodium Percarbonate with CoO Heterogeneous Activation

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Product

Resources

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MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment