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Enhancing catalytic activity of CuCoFe-layered double oxide towards peroxymonosulfate activation by coupling with biochar derived from durian peel for antibiotic degradation: The role of C=O in biochar and underlying mechanism of built-in electric field

Dung, N.T. and Khiem, T.C. and Thao, N.P. and Phu, N.A. and Son, N.T. and Dat, T.Q. and Phuong, N.T. and Trang, T.T. and Nhi, B.D. and Thuy, N.T. and Lin, K.-Y.A. and Huy, N.N. (2024) Enhancing catalytic activity of CuCoFe-layered double oxide towards peroxymonosulfate activation by coupling with biochar derived from durian peel for antibiotic degradation: The role of C=O in biochar and underlying mechanism of built-in electric field. Chemosphere, 361. ISSN 00456535

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Abstract

CuCoFe-LDO/BCD was successfully synthesized from CuCoFe-LDH and biochar derived from durian shell (BCD). Ciprofloxacin (CFX) degraded more than 95 mainly by O2•− and 1O2 in CuCoFe-LDO/BCD(2/1)/PMS system within 10 min with a rate constant of 0.255 min−1, which was 14.35 and 2.66 times higher than those in BCD/PMS and CuCoFe-LDO/PMS systems, respectively. The catalytic system exhibited good performance over a wide pH range (3–9) and high degradation efficiency of other antibiotics. Built-in electric field (BIEF) driven by large difference in the work function/Fermi level ratio between CuCoFe-LDO and BCD accelerated continuous electron transfer from CuCoFe-LDO to BCD to result in two different microenvironments with opposite charges at the interface, which enhanced PMS adsorption and activation via different directions. As a non-radical, 1O2 was mainly generated via PMS activation by C=O in BCD. The presence of C=O in BCD resulted in an increase in atomic charge of C in C=O and redistributed the charge density of other C atoms. As a result, strong adsorption of PMS at C atom in C=O and other C with a high positive charge was favorable for 1O2 generation, whereas an enhanced adsorption of PMS at negatively charged C accounted for the generation of •OH and SO4•−. After adsorption, electrons in C of BCD became deficient and were fulfilled with those transferred from CuCoFe-LDO driven by BIEF, which ensured the high catalytic activity of CuCoFe-LDO/BCD. O2•−, on the other hand, was generated via several pathways that involved in the transformation of •OH and SO4•− originated from PMS activation by the transition of metal species in CuCoFe-LDO and negatively charged C in BCD. This study proposed a new idea of fabricating a low-cost metal-LDH and biomass-derived catalyst with a strong synergistic effect induced by BIEF for enhancing PMS activation and antibiotic degradation. © 2024 Elsevier Ltd

Item Type: Article
Divisions: Offices > Office of International Cooperation
Identification Number: 10.1016/j.chemosphere.2024.142452
Uncontrolled Keywords: Adsorption; Antibiotics; Atoms; Catalyst activity; Copper compounds; Degradation; Electric fields; Free radical reactions; Rate constants, Antibiotic degradation; Biochar; Built-in electric fields; C atoms; CO functional group; Cucofe-LDO; Layered double oxide; Negatively charged; Peroxymonosulfate activations; PMS activation, Chemical activation, antibiotic agent; cellulose; charcoal; ciprofloxacin; copper cobalt iron layered double oxide biochar; hemicellulose; lignin; microsphere; mineral; nanocomposite; oxidizing agent; oxygen; peroxymonosulfate; reactive oxygen metabolite; unclassified drug; antiinfective agent; ciprofloxacin; copper; oxide; peroxide; peroxymonosulfate, antibiotics; biochar; biodegradation; catalyst; electric field; sulfate; transformation, absorption; adsorption; Article; biomass; built in electric field; carbonization; catalysis; Durio; electric field; electron transport; Fourier transform infrared spectroscopy; fruit peel; morphology; nonhuman; photodegradation; precursor; pyrolysis; rate constant; scanning electron microscopy; synthesis; temperature; X ray diffraction; catalysis; chemistry; water pollutant, Adsorption; Anti-Bacterial Agents; Catalysis; Charcoal; Ciprofloxacin; Copper; Oxides; Peroxides; Water Pollutants, Chemical
URI: http://eprints.lqdtu.edu.vn/id/eprint/11259

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