N-doped biochar mediated peroxydisulfate activation for selective degradation of bisphenol A: The key role of potential difference-driven electron transfer mechanism

Tan, Jiaqu; Chen, Xinmin; Shang, Mengjuan; Wang, Cuiling; Li, Dongya; Yang, Fan; Zhang, Zhen; Zhang, Haotian; Wu, Qi‐Tang; Li, Yongtao; Lin, Xueming

doi:10.1016/j.cej.2023.143476

Cited by 30 publications

(7 citation statements)

References 64 publications

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“…Three peaks of 284.7 285.3, and 290.3 eV in the C 1s spectrum were defined as CC (49.0%), CN (38.9%), and O–CO (12.1%), respectively (Figure S1g). As presented in Figure S1h, the N 1s spectrum was fitted into three characteristic peaks of pyridinic- N (398.6 eV, 40.8%), pyrrolic- N (400.3 eV, 34.1%), and graphitic- N (401.2 eV, 25.1%), respectively, demonstrating the presence of graphitic N. In addition, the O 1s spectrum had been fitted into four characteristic peaks of CO (532.0 eV, 37.6%), C–O–C (532.7 eV, 27.7%), C–OH (533.6 eV, 23.7%), and O 2 /C (536.9 eV, 11.0%), illustrating the presence of surface oxygenic functional groups (Figure S1i). The morphologies of Co-NCNRs were also investigated by SEM and TEM.…”

Section: Results and Discussionmentioning

confidence: 90%

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Pang,

Yan,

Zhang

et al. 2024

Inorg. Chem.

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Spatial confinement of organic pollutants and reactive oxygen species (e.g., SO 4•− and • OH) with ultrashort lifetime inside the scale of chemical theoretical diffusion could provide a greatly promising strategy to overcome the limitation of mass transfer in the heterogeneous Fenton-like oxidation process. Herein, we first reported spatial confinement of cobalt nanoparticles in N-doped carbon nanorods (Co-NCNRs), by encapsulating Co nanoparticles into Ndoped carbon nanorods, in activating CaSO 3 for antibiotic degradation. Compared to Na 2 SO 3 and NaHSO 3 , CaSO 3 could slowly and persistently discharge SO 3 2− due to its low solubility, thus avoiding the depletion of the generated SO 3•− and • OH under the high concentration of sulfite ions. Fully physical characterizations confirmed that the 3D hydrogel was mostly transformed into the nanorod structure of Co-NCNRs at 550 °C. Co atoms were successfully nanoconfined into N-doped carbon nanorods, which contributes to mass transfer and prevents the agglomeration of Co nanoparticles, thus enhancing its catalytic activity and stability in activating CaSO 3 for water decontamination. The catalytic performance, kinetic research, influences of inorganic anions, pH, and degradation mechanism of chlortetracycline degradation catalyzed by the Co-NCNRs/CaSO 3 system have been studied in detail. This work not only proposed a facile method for synthesis of nanoconfined catalyst but also provided an excellent Co-NCNRs/ CaSO 3 system for wastewater treatment.

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Section: Results and Discussionmentioning

confidence: 90%

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Pang,

Yan,

Zhang

et al. 2024

Inorg. Chem.

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“…The porous structure of TSBC would promote closer contact between the pollutant and the catalyst, thereby enhancing PDS activation and pollutant degradation [37]. Furthermore, N doping would facilitate electron transfer between TSBC and S 2 O 2− 8 , increasing the 1 O 2 generation and thereby boosting the efficiency of the non-radical pathway in SMX degradation [28]. In summary, the TSBC demonstrated exceptional catalytic performance for PDS, significantly enhancing the degradation efficiency of SMX.…”

Section: Theoretical Calculationmentioning

confidence: 97%

“…Further detailed analyses of the catalytic mechanism have revealed a notable influence of N-and O-containing functional groups on the catalytic efficiency of sludge biochar. Tan et al [28] identified graphitic C, pyridine N, and graphitic N as the primary active sites in biochar, which are crucial for facilitating electron transfer and thus promoting PDS activation. Contrarily, Mian et al [29] showed that pyridine N was the predominant active species in their research, facilitating the degradation of pollutants via non-radical pathways.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Peroxydisulfate (PDS) Activation for Sulfamethoxazole (SMX) Degradation by Modified Sludge Biochar: Focusing on the Role of Functional Groups

He,

Lin,

Yang

et al. 2024

Water

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Modified sludge biochar, recognized for its notable economic and environmental benefits, demonstrates potential as an effective catalyst for peroxydisulfate (PDS) activation. Nevertheless, the specific mechanisms underlying its catalytic performance require more comprehensive investigation. In this study, a modified biochar (TSBC) doped with oxygen (O) and nitrogen (N) atoms was synthesized from sewage sludge and tannin extract, which significantly enhanced the activation of PDS for the degradation of sulfamethoxazole (SMX). The TSBC/PDS system demonstrated robust performance for SMX degradation, achieving over 90% efficiency over a wide pH range (3–10). Subsequent quenching experiments demonstrated that TSBC predominantly catalyzed PDS to generate O21, which effectively degraded SMX via a non-radical pathway. The O- and N-containing functional groups in TSBC were identified as the primary catalytic sites. Besides, density functional theory (DFT) calculations revealed that the incorporation of graphitic N significantly improved the adsorption capacity of PDS on the TSBC surface. Furthermore, based on the identification of intermediates and theoretical calculations, SMX was degraded mainly by two different pathways: S-N cleavage and O21 oxidation. This study offers a foundational framework for the targeted modification of sludge biochar, thereby expanding its applications.

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“…Therefore, it is necessary to explore efficient technologies for the removal of organic dyes from the wastewater. − Advanced oxidation processes based on peroxydisulfate (PDS) have attracted increasing attention for the treatment of aqueous contaminants in recent years. Compared to other radicals (•OH), SO 4 •– radical shows a lot of advantages during the oxidation process, such as high oxidative capacity, high stability, and long half-life. − Usually, these excellent radicals are generated by activating PDS via heating, , light irradiation, acoustic cavitation, carbon materials, and transition metals catalyst . Among these activation methods, transition metal catalysts, such as Co, Mn, Fe, Cu, and Ni, are widely studied because of their high activation efficiency, comparatively low toxicity, and abundant in nature. − …”

Section: Introductionmentioning

confidence: 99%

Novel Magnetic MnFe₂O₄-Decorated Graphite-Like Porous Biochar as a Heterogeneous Catalyst for Activation of Peroxydisulfate Toward Degradation of Rhodamine B

Jiang,

Tan,

Jiang

et al. 2024

ACS Omega

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A magnetic MnFe 2 O 4 -modified graphite-like porous biochar composite (MnFe 2 O 4 /KFS800) was synthesized by the hydrothermal method, and its catalytic activity was evaluated in the activation of peroxydisulfate toward degradation of Rhodamine B. After characterization by SEM, XRD, and the BET method, the specific surface area and total pore volume of the MnFe 2 O 4 /KFS800 catalyst reached 121 m 2 /g and 0.263 m 3 /g, and exhibited plate-like morphology with good crystallinity. The degradation rate of Rhodamine B by the obtained composite was more than 91.1% when the initial concentration of RhB was 10 mg/L, the dosage of MnFe 2 O 4 /KFS800 was 0.2 g/L, and the initial pH was 6.7. Then the anti-interference ability of the obtained composite was studied, and it was found that there was a little effect on the degradation of Rhodamine B with the presence of humic acid. Finally, quenching test, EPR research, and XPS analysis were conducted to reveal the catalytic mechanism, and possible mechanism was a synergistic behavior of free radicals (SO 4•− , •OH, O 2 •− ) and nonfree radicals ( 1 O 2 ), and trace amounts of uncarbonized bagasse was also involved in the formation of free radicals.

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N-doped biochar mediated peroxydisulfate activation for selective degradation of bisphenol A: The key role of potential difference-driven electron transfer mechanism

Cited by 30 publications

References 64 publications

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Enhanced Peroxydisulfate (PDS) Activation for Sulfamethoxazole (SMX) Degradation by Modified Sludge Biochar: Focusing on the Role of Functional Groups

Novel Magnetic MnFe₂O₄-Decorated Graphite-Like Porous Biochar as a Heterogeneous Catalyst for Activation of Peroxydisulfate Toward Degradation of Rhodamine B

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N-doped biochar mediated peroxydisulfate activation for selective degradation of bisphenol A: The key role of potential difference-driven electron transfer mechanism

Cited by 30 publications

References 64 publications

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO3 Activation

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO3 Activation

Enhanced Peroxydisulfate (PDS) Activation for Sulfamethoxazole (SMX) Degradation by Modified Sludge Biochar: Focusing on the Role of Functional Groups

Novel Magnetic MnFe2O4-Decorated Graphite-Like Porous Biochar as a Heterogeneous Catalyst for Activation of Peroxydisulfate Toward Degradation of Rhodamine B

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Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO₃ Activation

Novel Magnetic MnFe₂O₄-Decorated Graphite-Like Porous Biochar as a Heterogeneous Catalyst for Activation of Peroxydisulfate Toward Degradation of Rhodamine B