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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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 |
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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 |