Fozia Aslam, Taniya Aslam, Fuad M. Alzahrani, Md Nagib Mahfuz Sunny, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Yasar, Anorgul I. Ashirova, Mirjalol Ismoilov Ruziboy Ugli, Yuling Feng
{"title":"钴掺杂尖晶石铁氧体纳米复合材料光催化降解环丙沙星抗生素：合成、表征和机理研究","authors":"Fozia Aslam, Taniya Aslam, Fuad M. Alzahrani, Md Nagib Mahfuz Sunny, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Yasar, Anorgul I. Ashirova, Mirjalol Ismoilov Ruziboy Ugli, Yuling Feng","doi":"10.1007/s10562-025-05194-3","DOIUrl":null,"url":null,"abstract":"<div><p>The widespread occurrence of pharmaceutical pollutants, particularly ciprofloxacin, in aquatic environments threatens ecosystem health and promotes bacterial resistance to antibiotics. Conventional wastewater treatments fail to meet the standards (< 0.1 µg/L), while TiO₂ photocatalysts show limited visible-light activity because of their wide band gaps (3.0-3.2 eV). In this study, Co-doped Co<sub>x</sub>Sr<sub>0.7−x</sub>Mn<sub>0.3</sub>Al<sub>0.4</sub>Fe<sub>1.6</sub>O<sub>4</sub> (X = 0,0.2) spinel ferrites were synthesized, and X-ray diffraction confirmed a cubic spinel ferrite structure, with cobalt doping reducing the crystallite size (from 28.371 to 20.488 nm). FTIR spectroscopy revealed the incorporation of Co through the peak shifts. The Co-doped catalyst exhibited enhanced properties: BET surface area increased from 6.63 to 32.14 m²/g, pore volume from 0.86 to 1.29 cm³/g, and optical band gap narrowed from 2.82 to 2.61 eV. Ciprofloxacin degradation improved from 53.65% to 100% in 70 min, with a quantum efficiency of 1.85 × 10⁻⁶ molec/photon and a space-time yield of 9.24 × 10⁻⁸ molec/ph. Kinetic analysis showed first-order behaviour (k₁ = 0.02411 min⁻¹, R² = 0.98864). The catalyst degraded Rhodamine B (82%), Methylene Blue (71.81%), tetracycline (66.82%), and sulfamethoxazole (42%) with hydroxyl radicals as the primary oxidisers, maintaining 91.66% efficiency after five cycles.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photocatalytic Degradation of Ciprofloxacin Antibiotics Via Cobalt Doped SPINEL Ferrites Nanocomposite: Synthesis, Characterization, and Mechanistic Insights\",\"authors\":\"Fozia Aslam, Taniya Aslam, Fuad M. Alzahrani, Md Nagib Mahfuz Sunny, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Yasar, Anorgul I. Ashirova, Mirjalol Ismoilov Ruziboy Ugli, Yuling Feng\",\"doi\":\"10.1007/s10562-025-05194-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The widespread occurrence of pharmaceutical pollutants, particularly ciprofloxacin, in aquatic environments threatens ecosystem health and promotes bacterial resistance to antibiotics. Conventional wastewater treatments fail to meet the standards (< 0.1 µg/L), while TiO₂ photocatalysts show limited visible-light activity because of their wide band gaps (3.0-3.2 eV). In this study, Co-doped Co<sub>x</sub>Sr<sub>0.7−x</sub>Mn<sub>0.3</sub>Al<sub>0.4</sub>Fe<sub>1.6</sub>O<sub>4</sub> (X = 0,0.2) spinel ferrites were synthesized, and X-ray diffraction confirmed a cubic spinel ferrite structure, with cobalt doping reducing the crystallite size (from 28.371 to 20.488 nm). FTIR spectroscopy revealed the incorporation of Co through the peak shifts. The Co-doped catalyst exhibited enhanced properties: BET surface area increased from 6.63 to 32.14 m²/g, pore volume from 0.86 to 1.29 cm³/g, and optical band gap narrowed from 2.82 to 2.61 eV. Ciprofloxacin degradation improved from 53.65% to 100% in 70 min, with a quantum efficiency of 1.85 × 10⁻⁶ molec/photon and a space-time yield of 9.24 × 10⁻⁸ molec/ph. Kinetic analysis showed first-order behaviour (k₁ = 0.02411 min⁻¹, R² = 0.98864). The catalyst degraded Rhodamine B (82%), Methylene Blue (71.81%), tetracycline (66.82%), and sulfamethoxazole (42%) with hydroxyl radicals as the primary oxidisers, maintaining 91.66% efficiency after five cycles.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 11\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-10-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05194-3\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05194-3","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Photocatalytic Degradation of Ciprofloxacin Antibiotics Via Cobalt Doped SPINEL Ferrites Nanocomposite: Synthesis, Characterization, and Mechanistic Insights
The widespread occurrence of pharmaceutical pollutants, particularly ciprofloxacin, in aquatic environments threatens ecosystem health and promotes bacterial resistance to antibiotics. Conventional wastewater treatments fail to meet the standards (< 0.1 µg/L), while TiO₂ photocatalysts show limited visible-light activity because of their wide band gaps (3.0-3.2 eV). In this study, Co-doped CoxSr0.7−xMn0.3Al0.4Fe1.6O4 (X = 0,0.2) spinel ferrites were synthesized, and X-ray diffraction confirmed a cubic spinel ferrite structure, with cobalt doping reducing the crystallite size (from 28.371 to 20.488 nm). FTIR spectroscopy revealed the incorporation of Co through the peak shifts. The Co-doped catalyst exhibited enhanced properties: BET surface area increased from 6.63 to 32.14 m²/g, pore volume from 0.86 to 1.29 cm³/g, and optical band gap narrowed from 2.82 to 2.61 eV. Ciprofloxacin degradation improved from 53.65% to 100% in 70 min, with a quantum efficiency of 1.85 × 10⁻⁶ molec/photon and a space-time yield of 9.24 × 10⁻⁸ molec/ph. Kinetic analysis showed first-order behaviour (k₁ = 0.02411 min⁻¹, R² = 0.98864). The catalyst degraded Rhodamine B (82%), Methylene Blue (71.81%), tetracycline (66.82%), and sulfamethoxazole (42%) with hydroxyl radicals as the primary oxidisers, maintaining 91.66% efficiency after five cycles.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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