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Wang J, Pi H, Zhao P, Zhou N. Efficient removal of methyl orange and ciprofloxacin by reusable Eu-TiO 2/PVDF membranes with adsorption and photocatalysis methods. RSC Adv 2024; 14:18432-18443. [PMID: 38860257 PMCID: PMC11163413 DOI: 10.1039/d4ra02962c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 06/03/2024] [Indexed: 06/12/2024] Open
Abstract
The presence of methyl orange (MO) and ciprofloxacin (CIP) in wastewater poses a serious threat to the environment and human health. Titanium dioxide nanoparticles (TiO2 NPs) are widely studied as photocatalysts for wastewater treatment. However, TiO2 NPs have the drawbacks of high energy required for activation, fast electron-hole pair recombination and difficulty in recovering from water. To overcome these problems, europium decorated titanium dioxide/poly(vinylidene fluoride) (Eu-TiO2/PVDF) membranes were successful prepared in this work by combining the modified sol-gel method and the immersion phase inversion method. The Eu-TiO2/PVDF membranes obtained with the increase of Eu-TiO2 NPs content during the preparation process were named M1, M2 and M3, respectively. The pure PVDF membrane without the addition of Eu-TiO2 NPs was named M0, which was prepared by the immersion phase inversion method and served as a reference. The prepared Eu-TiO2/PVDF membranes could not only adsorb MO, but also degrade CIP under visible-light irradiation. Moreover, the Eu-TiO2/PVDF membranes exhibited adsorption-photocatalytic activity towards a mixture of MO and CIP under visible-light irradiation. Last but not the least, the Eu-TiO2/PVDF membranes exhibited excellent recyclability and reusability, opening the avenue for a possible use of these membranes in sewage-treatment plants.
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Affiliation(s)
- Jiao Wang
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Hemu Pi
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Panchao Zhao
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Na Zhou
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
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2
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Hassan NS, Jalil AA, Fei ICM, Razak MTA, Khusnun NF, Bahari MB, Riwayati YI, Suprapto S, Prasetyoko D, Firmansyah ML, Salleh NFM, Rajendran S. Vanadia as an electron-hole recombination inhibitor on fibrous silica-titania for selective hole oxidation of ciprofloxacin and Congo red photodegradation. CHEMOSPHERE 2023; 338:139502. [PMID: 37453521 DOI: 10.1016/j.chemosphere.2023.139502] [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: 03/15/2023] [Revised: 06/25/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Vanadia (V2O5)-incorporated fibrous silica-titania (V/FST) catalysts, which were successfully synthesized using a hydrothermal method followed by the impregnation of V2O5. The catalysts were then characterized using numerous techniques, including X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, nitrogen adsorption-desorption analyses, ultraviolet-visible diffuse reflectance spectroscopy, Fourier-transform infrared, X-ray photoelectron spectroscopy, and photoluminescence (PL) analyses. The study found that varying the amount of V2O5 (1-10 wt%) had a significant impact on the physicochemical properties of the FST, which in turn improved the photodegradation efficiency of two organic compounds, ciprofloxacin (CIP) and congo red (CR). 5V/FST demonstrated the best performance in degrading 10 mg L-1 of CIP (83%) and CR (100%) at pH 3 using 0.375 g L-1 catalyst under visible light irradiation within 180 min. The highest photoactivity of 5V/FST is mainly due to higher crystallinity and the highest number of V2O5-FST interactions. Furthermore, as demonstrated by PL analysis, the 5V/FST catalyst has the most significant impact on interfacial charge transfer and reduces electron-hole recombination. The photodegradation of both contaminants follows the Langmuir-Hinshelwood pseudo-first-order model, according to the kinetic study. The scavenger investigation demonstrated that hydroxyl radicals and holes dominated species in the system, indicating that the catalyst effectively generated reactive species for pollutant degradation. A possible mechanism was also identified for FST and 5V/FST. Interestingly, V2O5 acts as an electron-hole recombination inhibitor on FST for selective hole oxidation of ciprofloxacin and congo red photodegradation. Finally, the degradation efficiency of the catalyst remained relatively stable even after five cyclic experiments, indicating its potential for long-term use in environmental remediation.
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Affiliation(s)
- N S Hassan
- Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - A A Jalil
- Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia.
| | - I C M Fei
- Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - M T A Razak
- Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - N F Khusnun
- Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - M B Bahari
- Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - Y I Riwayati
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Keputih, Sukolilo, Surabaya, 60111, Indonesia
| | - S Suprapto
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Keputih, Sukolilo, Surabaya, 60111, Indonesia
| | - D Prasetyoko
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Keputih, Sukolilo, Surabaya, 60111, Indonesia
| | - M L Firmansyah
- Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya, 60115, Indonesia
| | - N F M Salleh
- Environmental and Occupational Health Programme, School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Saravanan Rajendran
- Faculty of Engineering, Department of Mechanical Engineering, University of Tarapacá, Avda, General Velasquez, 1775, Arica, Chile
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Oyim J, Amuhaya E, Nyokong T. Activated carbon-decorated polyacrylonitrile fibers and their porphyrin-immobilized composites for removal of methylene blue dye and Ciprofloxacin in water. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2023. [DOI: 10.1080/10601325.2023.2183868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- James Oyim
- Institute for Nanotechnology Innovation, Rhodes University, Makhanda, South Africa
| | - Edith Amuhaya
- School of Pharmacy and Health Sciences, United States International University, Nairobi, Kenya
| | - Tebello Nyokong
- Institute for Nanotechnology Innovation, Rhodes University, Makhanda, South Africa
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4
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Khan S, Khan I, Sadiq M, Muhammad N. Experimental and Theoretical Photocatalytic Potential of Binary NiTiO2 and Ternary CdNiTiO2 Nanocomposites of TiO2. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Moghaddam AA, Mohammadi L, Bazrafshan E, Batool M, Behnampour M, Baniasadi M, Mohammadi L, Zafar MN. Antibiotics sequestration using metal nanoparticles: An updated systematic review and meta-analysis. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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Kulis-Kapuscinska A, Kwoka M, Borysiewicz MA, Wojciechowski T, Licciardello N, Sgarzi M, Cuniberti G. Photocatalytic degradation of methylene blue at nanostructured ZnO thin films. NANOTECHNOLOGY 2023; 34:155702. [PMID: 36595265 DOI: 10.1088/1361-6528/aca910] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
The photocatalytic degradation of the wastewater dye pollutant methylene blue (MB) at ZnO nanostructured porous thin films, deposited by direct current reactive magnetron sputtering on Si substrates, was studied. It was observed that over 4 photocatalytic cycles (0.3 mg · l-1MB solution, 540 minUV irradiation), the rate constantkof MB degradation decreased by ∼50%, varying in the range (1.54 ÷ 0.78) · 10-9(mol·l-1·min-1). For a deeper analysis of the photodegradation mechanism, detailed information on the nanostructured ZnO surface morphology and local surface and subsurface chemistry (nonstoichiometry) were obtained by using scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS) as complementary analytical methods. The SEM studies revealed that at the surface of the nanostructured ZnO thin films a coral reef structure containing polycrystalline coral dendrites is present, and that, after the photocatalytic experiments, the sizes of individual crystallites increased, varying in the range 43 ÷ 76 nm for the longer axis, and in the range 28 ÷ 58 nm for the shorter axis. In turn, the XPS studies showed a slight non-stoichiometry, mainly defined by the relative [O]/[Zn] concentration of ca. 1.4, whereas [C]/[Zn] was ca. 1.2, both before and after the photocatalytic experiments. This phenomenon was directly related to the presence of superficial ZnO lattice oxygen atoms that can participate in the oxidation of the adsorbed MB molecules, as well as to the presence of surface hydroxyl groups acting as hole-acceptors to produce OH· radicals, which can be responsible for the generation of superoxide ions. In addition, after experiments, the XPS measurements revealed the presence of carboxyl and carbonyl functional groups, ascribable to the oxidation by-products formed during the photodegradation of MB.
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Affiliation(s)
- Anna Kulis-Kapuscinska
- Department of Cybernetics, Nanotechnology and Data Processing, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
| | - Monika Kwoka
- Department of Cybernetics, Nanotechnology and Data Processing, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
| | - Michal Adam Borysiewicz
- Łukasiewicz Research Network-Institute of Microelectronics and Photonics, Aleja Lotników 32/46, 02-668 Warsaw, Poland
| | - Tomasz Wojciechowski
- International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland
| | - Nadia Licciardello
- Institute for Materials Science, Max Bergmann Centre of Biomaterials and Dresden Center for Nanoanalysis, TU Dresden, D-01062, Dresden, Germany
| | - Massimo Sgarzi
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, I-30172 Venezia Mestre, Italy
| | - Gianaurelio Cuniberti
- Institute for Materials Science, Max Bergmann Centre of Biomaterials and Dresden Center for Nanoanalysis, TU Dresden, D-01062, Dresden, Germany
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Hoang LAT, Le ND, Nguyen TD, Lee T. One-Step Synthesis of g-C3N4 Nanosheets with Enhanced Photocatalytic Performance for Organic Pollutants Degradation Under Visible Light Irradiation. Top Catal 2022. [DOI: 10.1007/s11244-022-01734-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Superior photocatalytic and electrochemical activity of novel WS2/PANI nanocomposite for the degradation and detection of pollutants: Antibiotic, heavy metal ions, and dyes. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Wang J, Sgarzi M, Němečková Z, Henych J, Licciardello N, Cuniberti G. Reusable and Antibacterial Polymer-Based Nanocomposites for the Adsorption of Dyes and the Visible-Light-Driven Photocatalytic Degradation of Antibiotics. GLOBAL CHALLENGES (HOBOKEN, NJ) 2022; 6:2200076. [PMID: 36381130 PMCID: PMC9638429 DOI: 10.1002/gch2.202200076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/05/2022] [Indexed: 06/16/2023]
Abstract
Adsorption and advanced oxidation processes, especially photocatalysis, are amongst the most common water treatment methodologies. Unfortunately, using each of these techniques independently does not fully eliminate the pollutants of diverse nature, which are present in wastewater. Here, an avenue for multifunctional materials for water treatment is opened by reporting for the first time the preparation, characterization, and study of the properties of a novel multifunctional nanocomposite with both adsorption and visible-light-driven photocatalysis abilities. These multifunctional nanocomposites, namely iron (II, III) oxide/poly(N-isopropylacrylamide-co-methacrylic acid)/silver-titanium dioxide (Fe3O4/P(NIPAM-co-MAA)/Ag-TiO2), are prepared by combining magnetic polymeric microspheres (Fe3O4/P(NIPAM-co-MAA)) with silver-decorated titanium dioxide nanoparticles (Ag-TiO2 NPs). Cationic dyes, such as basic fuchsin (BF), can be adsorbed by the nanocomposites thanks to the carboxylic groups of Fe3O4/P(NIPAM-co-MAA) microspheres. Concomitantly, the presence of Ag-TiO2 NPs endows the system with the visible-light-driven photocatalytic degradation ability toward antibiotics such as ciprofloxacin (CIP) and norfloxacin (NFX). Furthermore, the proposed nanocomposites show antibacterial activity toward Escherichia coli (E. coli), thanks to the presence of silver nanoparticles (Ag NPs). Due to the superparamagnetic properties of iron (II, III) oxide nanoparticles (Fe3O4 NPs), the nanocomposites can be also recycled and reused, after the cleaning process, by using an external magnetic field.
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Affiliation(s)
- Jiao Wang
- Institute for Materials ScienceMax Bergmann Center of Biomaterials and Dresden Center for NanoanalysisTU Dresden01062DresdenGermany
| | - Massimo Sgarzi
- Institute for Materials ScienceMax Bergmann Center of Biomaterials and Dresden Center for NanoanalysisTU Dresden01062DresdenGermany
- Present address:
Department of Molecular Sciences and NanosystemsCa’ Foscari University of VeniceVia Torino 15530172Venezia MestreItaly
| | - Zuzana Němečková
- Institute of Inorganic ChemistryCzech Academy of SciencesHusinec‐Řež 1001Řež250 68Czech Republic
| | - Jiří Henych
- Institute of Inorganic ChemistryCzech Academy of SciencesHusinec‐Řež 1001Řež250 68Czech Republic
- Faculty of EnvironmentJan Evangelista Purkyně UniversityPasteurova 3632/15Ústí nad Labem400 96Czech Republic
| | - Nadia Licciardello
- Institute for Materials ScienceMax Bergmann Center of Biomaterials and Dresden Center for NanoanalysisTU Dresden01062DresdenGermany
- Present address:
Department of Drug and Health SciencesUniversity of CataniaViale Andrea Doria 695125CataniaItaly
| | - Gianaurelio Cuniberti
- Institute for Materials ScienceMax Bergmann Center of Biomaterials and Dresden Center for NanoanalysisTU Dresden01062DresdenGermany
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Abromaitis V, Svaikauskaite J, Sulciute A, Sinkeviciute D, Zmuidzinaviciene N, Misevicius S, Tichonovas M, Urniezaite I, Jankunaite D, Urbonavicius M, Varnagiris S, Dzingeleviciene R, Baranauskis K, Martuzevicius D. Ozone-enhanced TiO 2 nanotube arrays for the removal of COVID-19 aided antibiotic ciprofloxacin from water: Process implications and toxicological evaluation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 318:115515. [PMID: 35949077 DOI: 10.1016/j.jenvman.2022.115515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/25/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
The purpose of this study was to evaluate the performance of synthesized TiO2 nanotube arrays (NTAs) for the removal of the COVID-19 aided antibiotic ciprofloxacin (CIP) and the textile dye methylene blue (MB) from model wastewater. Synthesis of TiO2 NTAs showed that anodization potential and calcination temperatures directly influence nanotube formation. The increased anodization potential from 10 to 40 V resulted in the development of larger porous nanotubes with a diameter of 36-170 nm, while the collapse of the tubular structure was registered at the highest applied potential. Furthermore, it was found that the 500 °C calcination temperature was the most prominent for the formation of the most photocatalytically active TiO2 NTAs, due to the optimal anatase/rutile ratio of 4.60. The degradation of both model compounds was achieved with all synthesized TiO2 NTAs; however, the most photocatalytically active NTA sample was produced at 30 V and 500 °C. Compared to photocatalysis, CIP degradation was greatly enhanced by 5-25 times when ozone was introduced to the photocatalytic cell (rates 0.4-4.2 × 10-1 min-1 versus 0.07-0.2 × 10-1 min-1). This resulted in the formation of CIP degradation by-products, with different mass-to-charge ratios from [M+H]+ 346 to 273 m/z. Even though the CIP degradation pathway is rather complex, three main mechanisms, decarboxylation, hydroxylation reaction, and piperazine ring cleavage, were proposed and explained. Furthermore, treated samples were placed in contact with the crustaceans Daphnia magna. It was found that 100% mortality was achieved when approximately 60% of the remaining TOC was present in the samples, indicating that toxic degradation by-products were formed.
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Affiliation(s)
- V Abromaitis
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania.
| | - J Svaikauskaite
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - A Sulciute
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - D Sinkeviciute
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - N Zmuidzinaviciene
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - S Misevicius
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - M Tichonovas
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - I Urniezaite
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - D Jankunaite
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
| | - M Urbonavicius
- Lithuanian Energy Institute, Breslaujos st. 3, LT-44403, Kaunas, Lithuania
| | - S Varnagiris
- Lithuanian Energy Institute, Breslaujos st. 3, LT-44403, Kaunas, Lithuania
| | - R Dzingeleviciene
- Marine Research Institute, Klaipeda University, Universiteto av. 17, LT-92294, Klaipeda, Lithuania
| | - K Baranauskis
- Marine Research Institute, Klaipeda University, Universiteto av. 17, LT-92294, Klaipeda, Lithuania
| | - D Martuzevicius
- Kaunas University of Technology, Chemical Faculty of Technology, Radvilenu st. 19, LT-50254, Kaunas, Lithuania
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Synthesis, characterization and photocatalytic properties of nanostructured lanthanide doped β-NaYF 4/TiO 2 composite films. Sci Rep 2022; 12:13748. [PMID: 35961994 PMCID: PMC9374679 DOI: 10.1038/s41598-022-17256-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022] Open
Abstract
The photocatalytic approach is known to be one of the most promising advanced oxidation processes for the tertiary treatment of polluted water. In this paper, β-NaYF4/TiO2 composite films have been synthetized through a novel sol–gel/spin-coating approach using a mixture of β-diketonate complexes of Na and Y, and Yb3+, Tm3+, Gd3+, Eu3+ as doping ions, together with the TiO2 P25 nanoparticles. The herein pioneering approach represents an easy, straightforward and industrially appealing method for the fabrication of doped β-NaYF4/TiO2 composites. The effect of the doped β-NaYF4 phase on the photocatalytic activity of TiO2 for the degradation of methylene blue (MB) has been deeply investigated. In particular, the upconverting TiO2/β-NaYF4: 20%Yb, 2% Gd, x% Tm (x = 0.5 and 1%) and the downshifting TiO2/β-NaYF4: 10% Eu composite films have been tested on MB degradation both under UV and visible light irradiation. An improvement up to 42.4% in the degradation of MB has been observed for the TiO2/β-NaYF4: 10% Eu system after 240 min of UV irradiation.
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Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution by Au@ZnO-rGO-gC3N4 Composites. Catalysts 2022. [DOI: 10.3390/catal12020166] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
The photocatalytic degradation of two quinolone-type antibiotics (ciprofloxacin and levofloxacin) in aqueous solution was studied, using catalysts based on ZnO nanoparticles, which were synthesized by a thermal procedure. The efficiency of ZnO was subsequently optimized by incorporating different co-catalysts of gC3N4, reduced graphene oxide, and nanoparticles of gold. The catalysts were fully characterized by electron microscopy (TEM and SEM), XPS, XRD, Raman, and BET surface area. The most efficient catalyst was 10%Au@ZnONPs-3%rGO-3%gC3N4, obtaining degradations of both pollutants above 96%. This catalyst has the largest specific area, and its activity was related to a synergistic effect, involving factors such as the surface of the material and the ability to absorb radiation in the visible region, mainly produced by the incorporation of rGO and gC3N4 in the semiconductor. The use of different scavengers during the catalytic process, was used to establish the possible photodegradation mechanism of both antibiotics.
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Arora A, Sunaina, Wadhwa R, Jha M. Conversion of scrap iron into ultrafine α-Fe 2O 3 nanorods for the efficient visible light photodegradation of ciprofloxacin. NEW J CHEM 2022. [DOI: 10.1039/d2nj00245k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study illustrates a feasible approach of utilizing scrap iron for the synthesis of iron(ii) oxide.
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Affiliation(s)
- Arushi Arora
- Institute of Nano Science & Technology, Knowledge City, Sector 81, Mohali, Punjab-140306, India
| | - Sunaina
- Institute of Nano Science & Technology, Knowledge City, Sector 81, Mohali, Punjab-140306, India
| | - Ritika Wadhwa
- Institute of Nano Science & Technology, Knowledge City, Sector 81, Mohali, Punjab-140306, India
| | - Menaka Jha
- Institute of Nano Science & Technology, Knowledge City, Sector 81, Mohali, Punjab-140306, India
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Li X, Hong X, Yang Y, Zhao J, Diko CS, Zhu Y. Enhanced antibacterial activity of acid treated MgO nanoparticles on Escherichia coli. RSC Adv 2021; 11:38202-38207. [PMID: 35498104 PMCID: PMC9043910 DOI: 10.1039/d1ra06221b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 11/23/2021] [Indexed: 12/19/2022] Open
Abstract
Acid treatment is one of the effective methods that directly modifies surface physical and chemical properties of inorganic materials, which improves the materials' application potential. In this work, the surface modified MgO nanoparticles (NPs) were prepared through a facile acid-treatment method at room temperature. Compared with the untreated sample, the surviving Escherichia coli (E. coli, ATCC 25922) colonies of the modified MgO NPs decreased from 120 to 54 (102 CFU mL-1). The enhanced antibacterial activity may be due to the improvement of oxygen vacancies and absorbed oxygen (OA) content (from 41.6% to 63.1%) as confirmed by electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS). These findings revealed that the acid treatment method could directly modify the surface of MgO NPs to expose more oxygen vacancies, which would promote reactive oxygen species (ROS) generation. The membrane tube and single ROS scavenging results further indicated that the increased antibacterial ability originated from the synergetic effect of ROS damage (especially ˙O2 -) and direct contact between H-MgO NPs and E. coli.
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Affiliation(s)
| | | | - Yan Yang
- Dalian Maritime University China
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15
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Parmar N, Srivastava JK. Degradation of pharmaceutical antibiotic (ciprofloxacin) by photocatalysis process using sol-gel based titanium dioxide nanoparticles. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This study is an attempt to the removal of Ciprofloxacin (CIP) antibiotic from simulated wastewater using a photocatalytic process. The photocatalytic process was carried out in a photocatalytic reactor in the presence of TiO2 nanoparticles. TiO2 nanoparticles were successfully prepared in a laboratory scale using sol-gel method with titanium-isopropoxide (TTIP) as titanium precursor. Prepared material was found very effective to the removal of CIP antibiotic. The maximum removal efficiency of 87.95% of ciprofloxacin from aqueous solution was achieved at the pH 5, catalyst doze of 40 mg L−1 with initial concentration of ciprofloxacin 5 mg L−1, and the reaction time of 100 min additionally; material characterization of TiO2 was presented in detail in terms of XRD, SEM, UV, and FTIR. It has been found that at the optimum condition the total operating cost indicated for the removal of ciprofloxacin from aqueous solution is 786.56 (INR/kg of CIP removal). This technique demonstrated that photocatalytic reaction in presence of TiO2 nanoparticles is well applicable to treat pharmaceutical wastewater.
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Affiliation(s)
- Nitesh Parmar
- Department of Chemical Engineering , Ujjain Engineering College , Ujjain , Madhya Pradesh , India
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