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Thakur I, Verma A, Örmeci B. Solar photocatalytic disinfection of real municipal wastewater using highly durable TiO 2-coated composite in a pilot scale once through reactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:43654-43664. [PMID: 36658321 DOI: 10.1007/s11356-023-25331-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/11/2023] [Indexed: 06/17/2023]
Abstract
Pollution of water sources by pathogens is a significant concern worldwide. In the present study, a pilot-scale once-through reactor was fabricated to investigate bacteria's inactivation and the degradation of organic matter present in municipal wastewater using an iron-mediated TiO2 catalyst in fixed mode. The catalyst was fabricated (in a spherical shape) using waste material such as foundry sand and fly ash and coated with TiO2 for a combined hybrid effect. The influence of H2O2 concentration and the flow rate of the reactor were examined. 4.1 log reductions of bacteria with 52% and 39% of BOD and COD reductions in 45 min of treatment were observed. The catalyst was also found to be highly durable, with only a 12.5% of reduction in catalyst activity observed after 200 recycles. Therefore, this pilot-scale research indicates the ability of waste materials to be employed as a practical approach for water disinfection applications.
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Affiliation(s)
- Ina Thakur
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Anoop Verma
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, 147004, India.
| | - Banu Örmeci
- Civil and Environmental Department, Carleton University, Ottawa, ON, KIS 5B6, Canada
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2
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Chen S, Hu YH. Color TiO 2 Materials as Emerging Catalysts for Visible-NIR Light Photocatalysis, A Review. CATALYSIS REVIEWS 2023. [DOI: 10.1080/01614940.2023.2169451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Shaoqin Chen
- Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan, USA
| | - Yun Hang Hu
- Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan, USA
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3
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Rabanimehr F, Farhadian M, Nazar ARS. A high-performance microreactor integrated with chitosan/ Bi 2WO 6/CNT/TiO 2 nanofibers for adsorptive/photocatalytic removal of cephalexin from aqueous solution. Int J Biol Macromol 2022; 208:260-274. [PMID: 35337910 DOI: 10.1016/j.ijbiomac.2022.03.108] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/20/2022]
Abstract
A Z-scheme Bi2WO6/CNT/TiO2 photocatalyst was synthesized hydrothermally and loaded on chitosan nanofibers with different mass percentages using the electrospinning process. The batch adsorption experiments for chitosan nanofibrous samples containing Bi2WO6/CNT/TiO2 revealed that the adsorption process and its kinetic followed the Langmuir isotherm and pseudo-second-order model, respectively. A planar microreactor with a reusable plate-type configuration was fabricated employing an inexpensive micromachining technique and integrated with chitosan/Bi2WO6/CNT/TiO2 nanofibers. The synergistic effect of the adsorption and photocatalysis was assessed for removing cephalexin under simulated sunlight irradiation in a continuous flow microreactor. The nanofibers containing 15 wt% of Bi2WO6/CNT/TiO2 exhibited the most removal efficiency. The effects of operational variables were investigated in the microreactor and optimized using response surface methodology as light intensity = 17.45 W/m2, retention time = 256 s, pH = 4.8, and initial cephalexin concentration = 29 mg/L. At this condition, cephalexin and TOC removal efficiencies reached 99.2% and 92.4%, respectively. The kinetic of disappearance of cephalexin under optimal conditions followed the Langmuir-Hinshelwood model. The adsorption equilibrium constant deduced from this model was similar to that one calculated from the Langmuir isotherm model. At the optimum condition, cephalexin removal efficiency reduced to 80% after 1500 min of microreactor operation and the nanofibers revealed appropriate stability and reusability.
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Affiliation(s)
- Fayazeh Rabanimehr
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
| | - Mehrdad Farhadian
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
| | - Ali Reza Solaimany Nazar
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
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Masmoudi R, Khettaf S, Soltani A, Dibi A, Messaadia L, Benamira M. Cephalexin degradation initiated by OH radicals: theoretical prediction of the mechanisms and the toxicity of byproducts. J Mol Model 2022; 28:141. [PMID: 35536376 DOI: 10.1007/s00894-022-05121-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/18/2022] [Indexed: 11/24/2022]
Abstract
In this work, the density functional theory is used to study the local reactivity of cephalexin (CLX) to radical attack and explain the mechanism of the reaction between CLX and hydroxyl radical attack leading to degradation byproducts. The reaction between •OH and CLX is supposed to lead to either an addition of a hydroxyl radical or an abstraction of a hydrogen. The results showed that the affinity of cephalexin for addition reactions increases as it passes from the gas to the aqueous phase and decreases as it passes from the neutral to the ionized form. Thermodynamic data confirmed that OH addition radicals (Radd) are thermodynamically favored over H abstraction radicals (Rabs). The ecotoxicity assessments of CLX and its byproducts are estimated from the acute toxicities toward green algae, Daphnia, and fish. The formation of byproducts is safe for aquatic organisms, and only one byproduct is harmful to Daphnia.
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Affiliation(s)
- R Masmoudi
- Laboratory of Chemistry and Environmental Chemistry LCEE, Department of Chemistry, Faculty of Material Sciences, University of Batna 1, 05000, Batna, Algeria
| | - S Khettaf
- Laboratory of Chemistry and Environmental Chemistry LCEE, Department of Chemistry, Faculty of Material Sciences, University of Batna 1, 05000, Batna, Algeria
| | - A Soltani
- Laboratory of Chemistry and Environmental Chemistry LCEE, Department of Chemistry, Faculty of Material Sciences, University of Batna 1, 05000, Batna, Algeria
| | - A Dibi
- Laboratory of Chemistry and Environmental Chemistry LCEE, Department of Chemistry, Faculty of Material Sciences, University of Batna 1, 05000, Batna, Algeria
| | - L Messaadia
- Laboratory of Applied Energy and Materials (LEAM), University of Jijel, BP. 98, Ouled Aissa, 18000, Jijel, Algeria.
| | - M Benamira
- Laboratory of Interaction Materials and Environment (LIME), University of Jijel, BP. 98, Ouled Aissa, 18000, Jijel, Algeria.
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Tavasol F, Tabatabaie T, Ramavandi B, Amiri F. Photocatalyst production from wasted sediment and quality improvement with titanium dioxide to remove cephalexin in the presence of hydrogen peroxide and ultrasonic waves: A cost-effective technique. CHEMOSPHERE 2021; 284:131337. [PMID: 34225119 DOI: 10.1016/j.chemosphere.2021.131337] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/20/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
In this study, wasted sediment (sludge waste from shipping docks) was coupled with titanium isopropoxide by the thermal and sol-gel method as a new photocatalyst. The sediment-titanate catalyst alongside ultrasonic and UV was activated hydrogen peroxide to produce OH radicals and decompose cephalexin (CEP). The photocatalyst was crystalline with 52.29 m2/g BET area. The best destruction rate of 87.01% based on COD test was achieved at optimal conditions (pH: 8, cephalexin concentration: 100 mg/L, H2O2: 1.63 mg/L, UV: 15 W/m2, ultrasonication time: 100 min at 40 kHz, photocatalyst quantity: 1.5 g/L). The trend of anions effect was NO3- ≤ SO42- ≤ Cl-. Decomposition of cephalexin in water solution followed the first-order kinetics (k > 0.01 min-1, R2 > 0.9). The percentage of cephalexin removal from urban water (76%) and hospital wastewater (63%) has decreased compared to the distilled water solution (87%), which is probably due to the presence of radical inhibitors. The consumed electrical energy of the studied system was calculated by 0.031 kW/h. The developed system is a promising and economical method to remove cephalexin.
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Affiliation(s)
- Fatemeh Tavasol
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran
| | - Tayebeh Tabatabaie
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran.
| | - Bahman Ramavandi
- Department of Environmental Health Engineering, Faculty of Health and Nutrition, Bushehr University of Medical Sciences, Bushehr, Iran.
| | - Fazel Amiri
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran
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6
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Gou Y, Peng L, Xu H, Li S, Liu C, Wu X, Song S, Yang C, Song K, Xu Y. Insights into the degradation mechanisms and pathways of cephalexin during homogeneous and heterogeneous photo-Fenton processes. CHEMOSPHERE 2021; 285:131417. [PMID: 34246101 DOI: 10.1016/j.chemosphere.2021.131417] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/17/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
The widespread occurrence of antibiotics in the environment poses a potential threat to human health. The photo-Fenton process has demonstrated better degradation performance compared with the conventional wastewater treatment processes. In this study, the degradation of cephalexin was evaluated comparatively by homogeneous (Fe2+/H2O2/UV) and heterogeneous (MoS2@Fe/H2O2/UV) photo-Fenton processes. Key influencing factors affecting photo-Fenton performance were assessed, confirming the optimum Fe2+ concentration at 0.2016 mg L-1 and H2O2/Fe2+ molar ratio at 6. Higher degradation efficiency (73.10%) and pseudo-first-order degradation rate constant (0.0078 min-1) were achieved with the assistance of MoS2@Fe as the heterogeneous catalyst. Completely different degradation products were identified in the homogeneous and heterogeneous photo-Fenton processes, with main degradation pathways proposed as β-lactam ring-opening, sulfoxide formation, demethylation, N-dealkylation, decarbonylation, hydroxylation and deamination in the Fe2+/H2O2/UV system and β-lactam ring-opening, hydroxylation, dehydration, amide hydrolysis, and demethylation and ring contraction in the MoS2@Fe/H2O2/UV system, respectively. The formation of newly identified products might root in the attack on cephalexin from active species (i.e., OH, h+, e-, O2-) photoinduced by the MoS2@Fe catalyst. Results also indicated the importance of understanding the underlying mechanisms and pathways to eliminate the antimicrobial activities of antibiotics in the future.
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Affiliation(s)
- Yejing Gou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Lai Peng
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Haixing Xu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China.
| | - Shengjun Li
- School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Chang Liu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Xiaoyong Wu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Shaoxian Song
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China
| | - Chenguang Yang
- Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan, 572000, China
| | - Kang Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, 430072, China
| | - Yifeng Xu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei, 430070, China.
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7
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Wang Q, Tu S, Wang W, Chen W, Duan X, Chang L. Optimized Indium modified Ti/PbO2 anode for electrochemical degradation of antibiotic cefalexin in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Aoudjit L, Salazar H, Zioui D, Sebti A, Martins PM, Lanceros-Mendez S. Reusable Ag@TiO 2-Based Photocatalytic Nanocomposite Membranes for Solar Degradation of Contaminants of Emerging Concern. Polymers (Basel) 2021; 13:3718. [PMID: 34771275 PMCID: PMC8587559 DOI: 10.3390/polym13213718] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/18/2021] [Accepted: 10/18/2021] [Indexed: 12/07/2022] Open
Abstract
Two significant limitations of using TiO2 nanoparticles for water treatment applications are reduced photocatalytic activity under visible radiation and difficulty recovering the particles after use. In this study, round-shaped Ag@TiO2 nanocomposites with a ≈21 nm diameter and a bandgap energy of 2.8 eV were synthesised by a deposition-precipitation method. These nanocomposites were immobilised into a porous poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) matrix and well-distributed within the pores. The photocatalytic activity of Ag@TiO2/PVDF-HFP against metronidazole (MNZ) under solar radiation was evaluated. Further, an adaptive neuro-fuzzy inference system (ANFIS) was applied to predict the effect of four independent variables, including initial pollutant concentration, pH, light irradiation intensity, and reaction time, on the photocatalytic performance of the composite membrane on MNZ degradation. The 10% Ag@TiO2/PVDF-HFP composite membrane showed a maximum removal efficiency of 100% after 5 h under solar radiation. After three use cycles, this efficiency remained practically constant, demonstrating the membranes' reusability and suitability for water remediation applications.
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Affiliation(s)
- Lamine Aoudjit
- Unité de Développement des Équipementssolaires, UDES/Centre de Développement des Energies Renouvelables, CDER, Bou Ismail, W. Tipaza 42415, Algéria; (L.A.); (D.Z.); (A.S.)
| | - Hugo Salazar
- Centre/Department of Physics, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal;
- Centre/Department of Chemistry, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal
| | - Djamila Zioui
- Unité de Développement des Équipementssolaires, UDES/Centre de Développement des Energies Renouvelables, CDER, Bou Ismail, W. Tipaza 42415, Algéria; (L.A.); (D.Z.); (A.S.)
| | - Aicha Sebti
- Unité de Développement des Équipementssolaires, UDES/Centre de Développement des Energies Renouvelables, CDER, Bou Ismail, W. Tipaza 42415, Algéria; (L.A.); (D.Z.); (A.S.)
| | - Pedro Manuel Martins
- Institute of Science and Innovation on Bio-Sustainability (IB-S), University of Minho, 4710-057 Braga, Portugal
- Centre of Molecular and Environmental Biology, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal
| | - Senentxu Lanceros-Mendez
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
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Son BT, Long NV, Nhat Hang NT. Fly ash-, foundry sand-, clay-, and pumice-based metal oxide nanocomposites as green photocatalysts. RSC Adv 2021; 11:30805-30826. [PMID: 35498918 PMCID: PMC9041310 DOI: 10.1039/d1ra05647f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/02/2021] [Indexed: 12/12/2022] Open
Abstract
Metal oxides possess exceptional physicochemical properties which make them ideal materials for critical photocatalytic applications. However, of major interest, their photocatalytic applications are hampered by several drawbacks, consisting of prompt charge recombination of charge carriers, low surface area, inactive under visible light, and inefficient as well as expensive post-treatment recovery. The immobilization of metal oxide semiconductors on materials possessing high binding strength eliminates the impractical and costly recovery of spent catalysts in large-scale operations. Notably, the synthesis of green material (ash, clay, foundry sand, and pumice)-based metal oxides could provide a synergistic effect of the superior adsorption capacity of supporting materials and the photocatalytic activity of metal oxides. This phenomenon significantly improves the overall degradation efficiency of emerging pollutants. Inspired by the novel concept of "treating waste with waste", this contribution highlights recent advances in the utilization of natural material (clay mineral and pumice)- and waste material (ash and foundry sand)-based metal oxide nanocomposites for photodegradation of various pollutants. First, principles, mechanism, challenges towards using metal oxide as photocatalysts, and immobilization techniques are systematically summarized. Then, sources, classifications, properties, and chemical composition of green materials are briefly described. Recent advances in the utilization of green materials-based metal oxide composites for the photodegradation of various pollutants are highlighted. Finally, in the further development of green materials-derived photocatalysts, we underlined the current gaps that are worthy of deeper research in the future.
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Affiliation(s)
- Bui Thanh Son
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
| | - Nguyen Viet Long
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
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10
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Kaur N, Verma A, Thakur I, Basu S. In-situ dual effect of Ag-Fe-TiO 2 composite for the photocatalytic degradation of Ciprofloxacin in aqueous solution. CHEMOSPHERE 2021; 276:130180. [PMID: 33743424 DOI: 10.1016/j.chemosphere.2021.130180] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/24/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
Industrial waste materials such as Fly Ash (FA), Foundry Sand (FS) were used as support material by mixing them with clay to fix the catalyst. Where FA and FS served as an iron (Fe) source to induce the photo-Fenton process. The presence of Fe in FA and FS was affirmed by SEM-EDS characterization. UV-DRS was performed to analyze the bandgap of the composite which reduced from 2.96 to 2.82 eV after doping TiO2 with Ag. This composite was used to initiate photocatalysis. The fixing of catalyst on a support formed the Fe-Ag-TiO2 complex which led to the commencement of the in-situ dual process(i.e. photocatalysis and photo-Fenton) in fixed bed mode. After the optimization of several parameters such as H2O2 dose, the area covered by beads, A/V ratio, Flow rate, pH under solar irradiations for 60 min, 94.4% degradation of CIP was attained. XRD analysis was carried out to confirm the crystallographic phases of the composite anatase and rutile phases of TiO2 were present in the composite. The systematic leaching of iron took place in this process and was confirmed by iron estimation during the reaction process. To understand the elemental composition of the composite SEM-EDS was performed and the present of TiO2, Fe and Ag was affirmed. Composite beads were stable and active even after the 30 recycles as confirmed by SEM-EDS. The intermediate products were analyzed by GC-MS analysis whereas the toxicity of the treated samples was studied by the zone inhibition test.
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Affiliation(s)
- Navneet Kaur
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Anoop Verma
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, 147004, India.
| | - Ina Thakur
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Soumen Basu
- School of Chemistry & Biochemistry, Thapar Institute of Engineering and Technology, Patiala, 147004, India
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11
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Osajima JA, Sá AS, Honorio LMC, Trigueiro P, Pinto LIF, Oliveira JA, Furtini MB, Bezerra RDS, Alcantara ACS, Silva-Filho EC. Au@Ag bimetallic nanoparticles deposited on palygorskite in the presence of TiO 2 for enhanced photodegradation activity through synergistic effect. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:23995-24007. [PMID: 33405111 DOI: 10.1007/s11356-020-11807-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Herbicides are hazardous organic pollutants that contribute to the risk of environmental contamination. The aim of this work was to investigate the synergistic effect of silver (Ag) and gold (Au) bimetallic nanoparticles deposited on palygorskite (PAL) in the presence of TiO2 for photodegradation of bentazone (BTZ) herbicide under UV light. Ag and Au@Ag nanoparticles exhibited an average size below 75 nm and surface charge values less than - 30 mV. UV-Vis spectroscopy indicates the formation of core@shell bimetallic nanoparticles. XRD results showed the interactions between the NPs and the palygorskite structure. SEM images clearly illustrate the presence of small spherical particles distributed in the clay fibers. The control of the size and distribution of the nanoparticles played an important role in the properties of the composites. The degradation of the herbicide BTZ showed that nanoparticles, clay, and only TiO2 did not produce satisfactory results; however, when Ag-Pal and Au@Ag-Pal were in the presence of the TiO2, the degradation was efficient. The best photodegradative system was Au@Ag-Pal+TiO2, which was maintained after the third cycle. The bentazone photodegradation using Au@Ag-PAL+TiO2 exhibited toxicity against Artemia salina. Therefore, Au@Ag-PAL+TiO2 photocatalyst showed that the synergy of bimetallic nanoparticles deposited on clay for enhanced photodegradation activity of bentazone herbicide.
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Affiliation(s)
- Josy A Osajima
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil.
| | - Alexandro S Sá
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Luzia M C Honorio
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Pollyana Trigueiro
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Lucas I F Pinto
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Joziel A Oliveira
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Marcelo B Furtini
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
| | - Roosevelt D S Bezerra
- Instituto Federal do Piauí, Teresina-Central Campus, IFPI, Teresina, Piauí, 64000-040, Brazil
| | - Ana C S Alcantara
- Laboratório de Química de Interfaces e Materiais - LIM/Grupo de Pesquisa em Materiais Híbridos e Bionanocompósitos - Bionanos, DEQUI, Universidade Federal do Maranhão, São Luís, Maranhão, 65080-805, Brazil
| | - Edson C Silva-Filho
- Laboratório Interdisciplinar de Materiais Avançados (LIMAV), UFPI, Universidade Federal do Piauí, UFPI, Teresina, Piauí, 64049-550, Brazil
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12
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Duan P, Chen D, Hu X. Tin dioxide decorated on Ni-encapsulated nitrogen-doped carbon nanotubes for anodic electrolysis and persulfate activation to degrade cephalexin: Mineralization and degradation pathway. CHEMOSPHERE 2021; 269:128740. [PMID: 33139044 DOI: 10.1016/j.chemosphere.2020.128740] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
In this study, bamboo-shaped carbon nanotubes exhibiting high nitrogen content and Ni encapsulation (Ni@NCNT) were effectively synthesized by a simple pyrolysis method. The catalytic peroxydisulfate activation for cephalexin (CPX) degradation was investigated using the prepared material. SnO2 was further decorated and fabricated on the anode material (SnO2/Ni@NCNT) for electrochemical degradation of CPX in an aqueous solution. Transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy indicated that the SnO2 nanoparticles were uniformly distributed on the surface of Ni@NCNT. Electrochemical characterization employing cyclic voltammetry and linear sweep voltammetry demonstrated that SnO2/Ni@NCNT displayed higher oxygen evolution potential and electrocatalytic activity than Ni@NCNT. Mineralization of CPX in wastewater was performed using electrolysis coupled with persulfate oxidation. The analysis revealed a synergistic strengthening effect. The electropersulfate oxidation resulted in higher total organic carbon (TOC) removal (70.3%) than the sum of electrooxidation (48.1%) and persulfate oxidation (9.2%) toward CPX. This phenomenon might result from the regeneration of sulfate radicals (SO4•-) on the anode and complementary oxidation by SO4•- and OH. Persulfate oxidation alone was shown to result in low TOC removal, although CPX was mostly degraded. Additionally, the CPX degradation pathway involving electropersulfate oxidation was proposed and it is indicated that CPX molecules were completed decomposed by the examination of short chain acids, mineralized ions, and ecotoxicity evolution indicated that the antibiotic was completely degraded. This study provides a new approach for the design and preparation of novel electrode materials and electrochemical degradation facilities for the removal of pollutants via persulfate activation.
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Affiliation(s)
- Pingzhou Duan
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China; Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China
| | - Dadi Chen
- Beijing Municipal Research Institute of Environmental Protection, Beijing, 100037, PR China
| | - Xiang Hu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China.
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Chen Y, Li R, Gu Y, Tian H, Huang Y, Chen J, Fang Y, Yang C. Green and efficient degradation of cefoperazone sodium by Bi 4O 5Br 2 leading to the production of non-toxic products: Performance and degradation pathway. J Environ Sci (China) 2021; 100:203-215. [PMID: 33279033 DOI: 10.1016/j.jes.2020.07.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/25/2020] [Accepted: 07/27/2020] [Indexed: 06/12/2023]
Abstract
Photocatalytic process represents a promising approach to overcome the pollution challenge associated with the antibiotics-containing wastewater. This study provides a green, efficient and novel approach to remove cephalosporins, particularly cefoperazone sodium (CFP). Bi4O5Br2 was chosen for the first time to systematically study its degradation for CFP, including the analysis of material structure, degradation performance, the structure and toxicity of the transformation products, etc. The degradation rate results indicated that Bi4O5Br2 had an excellent catalytic activity leading to 78% CFP removal compared with the pure BiOBr (38%) within 120 min of visible light irradiation. In addition, the Bi4O5Br2 presents high stability and good organic carbon removal efficiency. The effects of the solution pH (3.12 - 8.75) on catalytic activity revealed that CFP was mainly photocatalyzed under acidic conditions and hydrolyzed under alkaline conditions. Combined with active species and degradation product identification, the photocatalytic degradation pathways of CFP by Bi4O5Br2 was proposed, including hydrolysis, oxidation, reduction and decarboxylation. Most importantly, the identified products were all hydrolysis rather than oxidation byproducts transformed from the intermediate of β-lactam bond cleavage in CFP molecule, quite different from the mostly previous studies. Furthermore, the final products were demonstrated to be less toxic through the toxicity analysis. Overall, this study illustrates the detailed mechanism of CFP degradation by Bi4O5Br2 and confirms Bi4O5Br2 to be a promising material for the photodegradation of CFP.
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Affiliation(s)
- Yingying Chen
- College of Biology and Pharmacy, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Ruiping Li
- College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Yan Gu
- College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Hailin Tian
- College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Yingping Huang
- College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China.
| | - Junsong Chen
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Yanfen Fang
- College of Biology and Pharmacy, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Changying Yang
- College of Biology and Pharmacy, China Three Gorges University, Yichang, 443002, China; Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China.
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Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process. NANOMATERIALS 2020; 10:nano10112300. [PMID: 33233690 PMCID: PMC7699740 DOI: 10.3390/nano10112300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/11/2020] [Accepted: 11/18/2020] [Indexed: 01/25/2023]
Abstract
A new composite by coupling chalcopyrite (CuFeS2) with silver phosphate (Ag3PO4) (CuFeS2/Ag3PO4) was proposed by using a cyclic microwave heating method. The prepared composites were characterized by scanning and transmission electron microscopy and X-ray diffraction, Fourier-transform infrared, UV–Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Under optimum conditions and 2.5 W irradiation (wavelength length > 420 nm, power density = 0.38 Wcm−2), 96% of rhodamine B (RhB) was degraded by CuFeS2/Ag3PO4 within a 1 min photo-Fenton reaction, better than the performance of Ag3PO4 (25% degradation within 10 min), CuFeS2 (87.7% degradation within 1 min), and mechanically mixed CuFeS2/Ag3PO4 catalyst. RhB degradation mainly depended on the amount of hydroxyl radicals generated from the Fenton reaction. The degradation mechanism of CuFeS2/Ag3PO4 from the photo-Fenton reaction was deduced using a free radical trapping experiment, the chemical reaction of coumarin, and photocurrent and luminescence response. The incorporation of CuFeS2 in Ag3PO4 enhanced the charge separation of Ag3PO4 and reduced Ag3PO4 photocorrosion as the photogenerated electrons on Ag3PO4 were transferred to regenerate Cu2+/Fe3+ ions produced from the Fenton reaction to Cu+/Fe2+ ions, thus simultaneously maintaining the CuFeS2 intact. This demonstrates the synergistic effect on material stability. However, hydroxyl radicals were produced by both the photogenerated holes of Ag3PO4 and the Fenton reaction of CuFeS2 as another synergistic effect in catalysis. Notably, the degradation performance and the reusability of CuFeS2/Ag3PO4 were promoted. The practical applications of this new material were demonstrated from the effective performance of CuFeS2/Ag3PO4 composites in degrading various dyestuffs (90–98.9% degradation within 10 min) and dyes in environmental water samples (tap water, river water, pond water, seawater, treated wastewater) through enhanced the Fenton reaction under sunlight irradiation.
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Askari N, Beheshti M, Mowla D, Farhadian M. Fabrication of CuWO 4/Bi 2S 3/ZIF67 MOF: A novel double Z-scheme ternary heterostructure for boosting visible-light photodegradation of antibiotics. CHEMOSPHERE 2020; 251:126453. [PMID: 32443224 DOI: 10.1016/j.chemosphere.2020.126453] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/25/2020] [Accepted: 03/07/2020] [Indexed: 06/11/2023]
Abstract
A novel double Z-scheme CuWO4/Bi2S3/ZIF67 ternary heterostructure was synthesized through hydrothermal method. The catalysts were characterized by XRD, FTIR, SEM, EDX, BET, TEM, PL, and UV-vis DRS analyses. The degradations of Metronidazole (MTZ) and Cephalexin (CFX) antibiotics by ternary catalyst were investigated in the batch and continuous slurry photoreactor under LED illumination. The ternary heterostructure exhibited a remarkable improvement in photoactivity compared with CuWO4/Bi2S3, and pristine ZIF67. Indeed, higher surface area, photo-stability, bandgap suppressing as well as better charge separation based on the dual Z-scheme structure caused the enhancement. The optimum values of operating parameters were obtained by the central composite design as: catalyst dose = 0.3 g/L, pH = 7, illumination time = 80 min, and 20 ppm initial concentration of antibiotic. The maximum degradation efficiencies by the new ternary heterostructure were 95.6% and 90.1%, respectively for MTZ and CFX at optimum conditions in the continuous flow mode. Maximum total organic carbon (TOC) removal rates were 83.2% and 74% for MTZ and CFX, respectively. The degradations by ternary composite followed the first-order kinetic, by reaction rate of 9 times, 5.5 times, and 4 times higher than that obtained by Bi2S3, ZIF67, and the binary CuWO4/Bi2S3, respectively. The influences of temperature and light intensity were explored, revealing 25 °C and 400 W/m2 as the optimum values. The new ternary heterostructure demonstrated excellent reusability and chemical stability after six cycles. The dominant active species were explored by trapping tests, indicating OH. free radicals as the most primary oxidant.
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Affiliation(s)
- Najmeh Askari
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran
| | - Masoud Beheshti
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
| | - Dariush Mowla
- Environmental Research Center in Petroleum and Petrochemical Industries, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran.
| | - Mehrdad Farhadian
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran
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Tavasol F, Tabatabaie T, Ramavandi B, Amiri F. Design a new photocatalyst of sea sediment/titanate to remove cephalexin antibiotic from aqueous media in the presence of sonication/ultraviolet/hydrogen peroxide: Pathway and mechanism for degradation. ULTRASONICS SONOCHEMISTRY 2020; 65:105062. [PMID: 32172148 DOI: 10.1016/j.ultsonch.2020.105062] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/06/2020] [Accepted: 03/07/2020] [Indexed: 06/10/2023]
Abstract
The aim of the current study was directed to develop a new sea sediment/titanate photocatalyst to remove cephalexin from aqueous media in the presence of ultraviolet (UV) light, hydrogen peroxide (H2O2), and ultrasonic waves. The influence of furnace temperature (300, 350, 400, and 500 °C), furnace residence time (1, 2, 3, and 4 h), and ratio of sea sediment: titanium (0-6 v: w) on the physicochemical properties and the cephalexin removal by the sea sediment/titanate photocatalyst was explored. The technique of FTIR, SEM/EDX, XRD, BET, BJH, and Mapping was used to determine the physicochemical properties of the generated photocatalyst. The maximum cephalexin removal (94.71%) was obtained at the furnace temperature of 500 °C, the furnace residence time of 2 h, and the sea sediment: titanium ratio of 1:6 (=12 mL TiO2/2 g sea sediment). According to the acquired results, the surface area of the optimized catalyst, namely Cat-500-2-12, was computed to be 52.29 m2/g. The crystallite size of titanium oxide on the optimum photocatalyst was calculated ~17.68 nm. The FTIR test confirmed the presence of C=C, O-H, C=O, C-S, and C-H functional groups in the photocatalyst. The transformation pathway for the degradation of cephalexin by the developed system was drawn. The present investigation showed that the developed technique (sea sediment/titanate-UV-H2O2-ultrasonic) could be used as a promising alternative for attenuating cephalexin from aqueous solutions.
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Affiliation(s)
- Fatemeh Tavasol
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran
| | - Taybeh Tabatabaie
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran.
| | - Bahman Ramavandi
- Systems Environmental Health and Energy Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran; Department of Environmental Health Engineering, Faculty of Health and Nutrition, Bushehr University of Medical Sciences, Bushehr, Iran.
| | - Fazel Amiri
- Department of Environment, Bushehr Branch, Islamic Azad University, Bushehr, Iran
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Salazar H, Martins PM, Santos B, Fernandes MM, Reizabal A, Sebastián V, Botelho G, Tavares CJ, Vilas-Vilela JL, Lanceros-Mendez S. Photocatalytic and antimicrobial multifunctional nanocomposite membranes for emerging pollutants water treatment applications. CHEMOSPHERE 2020; 250:126299. [PMID: 32113095 DOI: 10.1016/j.chemosphere.2020.126299] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/15/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Emerging pollutants represent a new global problem for water quality. As these compounds get into the environment, they cause severe threats to aquatic environments and human health and are typically resistant to conventional wastewater treatments. In this work, TiO2 nanoparticles surface was functionalized with silver (Ag) nanoparticles, and solvent cast and electrospun membranes of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) were prepared with different concentrations of TiO2 and Ag-TiO2 to produce a multifunctional material. The photocatalytic activity of the nanocomposites was evaluated through the degradation of norfloxacin under ultraviolet (UV) and visible radiation. It is shown that nanocomposites with Ag-TiO2 show the highest degradation efficiencies: 64.2% under UV and 80.7% under visible radiation, for 90 and 300 min, respectively. Furthermore, the recyclability of the membranes has also been demonstrated. Finally, it is shown the antimicrobial activity of the nanocomposite membranes, demonstrating the suitability of the Ag-TiO2/PVDF-HFP nanocomposites as multifunctional photocatalytic and antimicrobial membranes for water remediation applications.
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Affiliation(s)
- H Salazar
- Centre/Department of Physics, Portugal; Centre/Department of Chemistry, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal
| | - P M Martins
- Centre/Department of Physics, Portugal; Centre/Department of Chemistry, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal.
| | - Bruno Santos
- Centre/Department of Physics, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal
| | - M M Fernandes
- Centre/Department of Physics, Portugal; Centre/Department of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal
| | - Ander Reizabal
- BCMaterials, Parque Científico y Tecnológico de Bizkaia, 48160, Derio, Spain
| | - Víctor Sebastián
- Chemical and Environmental Engineering Department, Instituto de Nanociencia de Aragón (INA) and Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50018, Zaragoza, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBERBBN, 28029, Madrid, Spain
| | - G Botelho
- Centre/Department of Chemistry, Portugal
| | | | - José L Vilas-Vilela
- BCMaterials, Parque Científico y Tecnológico de Bizkaia, 48160, Derio, Spain; Macromolecular Chemistry Research Group (LABQUIMAC), Dept. of Physical Chemistry. Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Spain
| | - S Lanceros-Mendez
- BCMaterials, Parque Científico y Tecnológico de Bizkaia, 48160, Derio, Spain; IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain.
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In vitro antimicrobial and anticancer properties of TiO2 blow-spun nanofibers containing silver nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109876. [DOI: 10.1016/j.msec.2019.109876] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 05/24/2019] [Accepted: 06/07/2019] [Indexed: 01/08/2023]
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