51
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Magnetic nanoparticle-decorated graphene oxide-chitosan composite as an efficient nanocarrier for protein delivery. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125913] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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52
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Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite. COATINGS 2020. [DOI: 10.3390/coatings10121200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Statistics show that more than 700 thousand tons of dye are produced annually across the globe. Around 10–20% of this is used in industrial processes such as printing and dyeing, while about 50% of the dye produced is discharged into the environment without proper physicochemical treatment. Even trace amounts of dye in water can reduce oxygen solubility and have carcinogenic, mutagenic, and toxic effects on aquatic organisms. Therefore, before dye-containing wastewater is discharged into the environment, it must be properly treated. The present study investigates the green synthesis of nickel ferrite NiFe2O4 (NIFE) spinel magnetic nanoparticles (MNPs) via chemical coprecipitation of a solution of Ni2+/Fe3+ in the presence of a biopolymer blend of chitosan (CT) and ascorbic acid (AS). The magnetic nanomaterial was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy–energy dispersive X-ray analysis (SEM-EDX), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), differential scanning calorimetry (DSC), and vibrating-sample magnetometry (VSM). The material was further explored as a catalyst for the photocatalytic degradation of malachite green (MG) under visible light irradiation coupled with ultrasonic waves. The combination of 90 min of visible solar light irradiation with 6.35 W·mL−1 ultrasonic power at pH 8 resulted in 99% of the photocatalytic efficiency of chitosan-ascorbic acid@NIFE (CTAS@NIFE) catalyst for 70 mg·L−1 MG. The quenching of the photocatalytic efficiency from 98% to 64% in the presence of isopropyl alcohol (IPA) suggested the involvement of hydroxy (•OH) radicals in the mineralization process of MG. The high regression coefficients (R2) of 0.99 for 35, 55, and 70 mg·L−1 MG indicated the sonophotocatalysis of MG by CTAS@NIFE was best defined by a pseudo first-order kinetic model. The mechanism involves the adsorption of MG on the catalyst surface in the first step and thereby mineralization of the MG by the generated hydroxyl radicals (•OH) under the influence of visible radiation coupled with 6.34 W·mL−1 ultrasonic power. In the present study the application of photodegradation process with sonochemistry results in 99% of MG mineralization without effecting the material structure unlike happens in the case adsorption process. So, the secondary pollution (generally happens in case of adsorption) can be avoided by reusing the spent material for another application instead of disposing it. Thus, the ecofriendly synthesis protocol, ease in design of experimentation like use of solar irradiation instead of electric power lamps, reusability and high efficiency of the material suggested the study to be potentially economical for industrial development at pilot scale towards wastewater remediation.
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53
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Mishra S, Sahoo S, Debnath A, Muthe K, Das N, Parhi P. Cobalt ferrite nanoparticles prepared by microwave hydrothermal synthesis and adsorption efficiency for organic dyes: Isotherms, thermodynamics and kinetic studies. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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54
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Nikazar S, Barani M, Rahdar A, Zoghi M, Kyzas GZ. Photo‐ and Magnetothermally Responsive Nanomaterials for Therapy, Controlled Drug Delivery and Imaging Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.202002978] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sohrab Nikazar
- Chemical Engineering Faculty Engineering College, University of Tehran Tehran P.O. Box:14155-6455 Iran
| | - Mahmood Barani
- Department of Chemistry Shahid Bahonar University of Kerman Kerman Iran
| | - Abbas Rahdar
- Department of Physics, Faculty of science University of Zabol 538-98615 Zabol Iran
| | - Maryam Zoghi
- Chemical Engineering Faculty Engineering College, University of Tehran Tehran P.O. Box:14155-6455 Iran
| | - George Z. Kyzas
- Department of Chemistry International Hellenic University Kavala 65404 Greece
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55
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Mishra S, Kumar P, Samanta SK. Microwave Catalytic Degradation of Antibiotic Molecules by 2D Sheets of Spinel Nickel Ferrite. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02352] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sandhya Mishra
- Department of Chemical and Biochemical Engineering, Indian Institute of Technology Patna, Bihta, Patna, Bihar 801106, India
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihta, Patna, Bihar 801106, India
- Birck Nanotechnology Centre, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sujoy Kumar Samanta
- Department of Chemical and Biochemical Engineering, Indian Institute of Technology Patna, Bihta, Patna, Bihar 801106, India
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56
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Nickel ferrite nanoparticles on a carbonaceous matrix and their colorimetric assay for ascorbic acid detection. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01780-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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57
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Dasari GK, Sunkara S, Gadupudi PCR. One-step synthesis of magnetically recyclable palladium loaded magnesium ferrite nanoparticles: application in synthesis of anticancer drug PCI-32765. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1724147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Gopala Krishna Dasari
- Department of Chemistry, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India
- Chemical Research and Development, Shilpa Medicare Limited, Vizianagaram, Andhra Pradesh, India
| | - Satyaveni Sunkara
- Department of Chemistry, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India
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58
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Sanchez-Lievanos KR, Tariq M, Brennessel WW, Knowles KE. Heterometallic trinuclear oxo-centered clusters as single-source precursors for synthesis of stoichiometric monodisperse transition metal ferrite nanocrystals. Dalton Trans 2020; 49:16348-16358. [DOI: 10.1039/d0dt01369b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Solvothermal reactions of MIIFe2III(μ3-O)(μ2-O2CR)6(H2O)3 (R = CF3, M = Fe, Co, Ni, Cu, Zn) clusters produce monodisperse, phase-pure MFe2O4 nanocrystals.
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Affiliation(s)
| | - Mehrin Tariq
- Department of Chemistry
- University of Rochester
- Rochester
- USA
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59
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Deshpande NG, Ahn CH, Kim DS, Jung SH, Kim YB, Cho HK. Bifunctional reusable Co0.5Ni0.5Fe2O4 nanoparticle-grafted carbon nanotubes for aqueous dye removal from contaminated water. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01057j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Highly stable and reusable CNF-grafted CNTs for efficient and effective aqueous dye removal from contaminated waters.
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Affiliation(s)
- Nishad G. Deshpande
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Cheol Hyoun Ahn
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Dong Su Kim
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Sung Hyeon Jung
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Young Been Kim
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Hyung Koun Cho
- School of Advanced Materials Science and Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
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60
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Debnath S, Das R. Study of the optical properties of Zn doped Mn spinel ferrite nanocrystals shows multiple emission peaks in the visible range –a promising soft ferrite nanomaterial for deep blue LED. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127044] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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61
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Bera P, Lakshmi RV, Prakash BH, Tiwari K, Shukla A, Kundu AK, Biswas K, Barshilia HC. Solution combustion synthesis, characterization, magnetic, and dielectric properties of CoFe2O4 and Co0.5M0.5Fe2O4 (M = Mn, Ni, and Zn). Phys Chem Chem Phys 2020; 22:20087-20106. [DOI: 10.1039/d0cp03161e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Co0.5Zn0.5Fe2O4 (CZF) shows the highest Ms value compared to CoFe2O4 (CF), Co0.5Mn0.5Fe2O4 (CMF), and Co0.5Ni0.5Fe2O4 (CNF) as Zn2+ would prefer to occupy tetrahedral sites with a consequent increase of the Fe3+ concentration in octahedral sites.
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Affiliation(s)
- Parthasarathi Bera
- Surface Engineering Division
- CSIR – National Aerospace Laboratories
- Bengaluru 560017
- India
| | - R. V. Lakshmi
- Surface Engineering Division
- CSIR – National Aerospace Laboratories
- Bengaluru 560017
- India
| | - B. H. Prakash
- Surface Engineering Division
- CSIR – National Aerospace Laboratories
- Bengaluru 560017
- India
| | - Khushubo Tiwari
- Department of Materials Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ashish Shukla
- Discipline of Physics
- Indian Institute of Information Technology Design and Manufacturing Jabalpur
- Madhya Pradesh 482005
- India
| | - Asish K. Kundu
- Discipline of Physics
- Indian Institute of Information Technology Design and Manufacturing Jabalpur
- Madhya Pradesh 482005
- India
| | - Krishanu Biswas
- Department of Materials Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Harish C. Barshilia
- Surface Engineering Division
- CSIR – National Aerospace Laboratories
- Bengaluru 560017
- India
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62
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Slimani Y, Almessiere MA, Korkmaz AD, Guner S, Güngüneş H, Sertkol M, Manikandan A, Yildiz A, Akhtar S, Shirsath SE, Baykal A. Ni 0.4Cu 0.2Zn 0.4Tb xFe 2-xO 4 nanospinel ferrites: Ultrasonic synthesis and physical properties. ULTRASONICS SONOCHEMISTRY 2019; 59:104757. [PMID: 31479888 DOI: 10.1016/j.ultsonch.2019.104757] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 05/27/2023]
Abstract
The Fe3+ ions were replace with Tb3+ ions as highly paramagnetic rare earth element within the structure of Ni0.4Cu0.2Zn0.4Fe2O4 nano-spinel ferrites (NSFs). The structural, magnetic, spectroscopic and optic properties have been studied in details. All products have been synthesized via ultrasonic approach via Qsonica ultrasonic homogenizer, frequency: 20 kHz and power: 70 W for 60 min. No annealing or calcination process was applied for any product. The microstructural analysis of products has been done via X-ray powder diffractometry (XRD) which presented the cubic spinel structure with nanosized distribution of all. The cubic morphology of all products were confirmed by both HR-TEM and FE-SEM. Optical band gap (Eg) values were assessed by applying %DR (percent diffuse reflectance) analysis and Kubelka-Munk theory. The Tauc schemes showed that Eg values are in a narrow range (1.87-1.98 eV). The quadrupole splitting, line width, hyperfine magnetic field, isomer shift values and cation distribution have been determined from 57Fe Mossbauer analysis. The magnetic properties of various nanoparticles have been obtained from VSM (vibration sample magnetometer) measurements at 10 and 300 K (RT). The magnetic results revealed superparamagnetic and soft ferromagnetic traits at 10 and 300 K, respectively. Ms (saturation magnetization) and Mr (remanence) initially increase with increasing Tb3+ substituting level up to x = 0.06 then diminish for further x values. Hc (coercivity) shows an opposite variation tendency of Ms and Mr. The observed magnetic traits are deeply discussed in relation with the structure, morphology, magnetic moments and cation distributions.
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Affiliation(s)
- Y Slimani
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia.
| | - M A Almessiere
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia; Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - A Demir Korkmaz
- Department of Chemistry, Istanbul Medeniyet University, 34700 Istanbul, Uskudar, Turkey
| | - S Guner
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany
| | - H Güngüneş
- Department of Physics, Hitit University, 19030 Çevre Yolu Bulvarı-Çorum, Turkey
| | - M Sertkol
- Deanship of Preparatory Year Building 450, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - A Manikandan
- Department of Chemistry, Bharath Institute of Higher Education and Research (BIHER), Bharath University, Chennai 600073, Tamil Nadu, India
| | - A Yildiz
- Department of Textile Engineering, Namık Kemal University, 59860 Corlu-Tekirdag, Turkey
| | - S Akhtar
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Sagar E Shirsath
- School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
| | - A Baykal
- Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
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63
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Almessiere MA, Slimani Y, Korkmaz AD, Taskhandi N, Sertkol M, Baykal A, Shirsath SE, Ercan I, Ozçelik B. Sonochemical synthesis of Eu 3+ substituted CoFe 2O 4 nanoparticles and their structural, optical and magnetic properties. ULTRASONICS SONOCHEMISTRY 2019; 58:104621. [PMID: 31450366 DOI: 10.1016/j.ultsonch.2019.104621] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/24/2019] [Accepted: 05/28/2019] [Indexed: 05/24/2023]
Abstract
Magnetic, optic and microstructural properties of ultrasonically synthesized CoEuxFe2-xO4 (x ≤ 0.1) nanoferrites (NFs) have been examined in this study. After sonochemical synthesis, XRD and FT-IR analyses confirmed the purity, the structure (cubic spinel structure and Fd3m space group) and the spectral properties of the spinel ferrite samples. The spherical morphology and chemical compositions of the products were observed via transmission and scanning electron microscopes along with EDX and elemental mapping. Percent diffuse reflectance (%DR) was used for optical investigation. Optical band gaps (Eg) were estimated utilizing Kubelka-Munk theory and Tauc equation. Eg values are in a narrow band of 1.34 to 1.44 eV. The magnetic parameters like Ms (saturation magnetization), SQR = Mr/Ms (squareness ratio), nB (magnetic moment), Hc (coercivity) and Mr (remanence) have been evaluated by analyzing measurements of magnetization versus magnetic field performed at room (RT; T = 300 K) and low (T = 10 K) temperatures. It is showed that the different produced CoEuxFe2-xO4 (0.00 ≤ x ≤ 0.10) nanospinel ferrites present superparamagnetic (SPM) nature at RT. At low temperature, the various produced CoEuxFe2-xO4 (x ≤ 0.08) nanospinel ferrites display ferrimagnetic (FM) nature. With exception, the x = 0.10 sample exhibit SPM behavior at T = 10 K. It is noticed that the Eu3+ substitutions alter in a significant way on the magnetic data. A decreasing trend in the Ms, Mr and nB values was noted with Eu3+ substitutions.
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Affiliation(s)
- M A Almessiere
- Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia; Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Y Slimani
- Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia.
| | - A D Korkmaz
- Department of Chemistry, Istanbul Medeniyet University, 34700 Istanbul, Uskudar, Turkey
| | - N Taskhandi
- Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - M Sertkol
- Deanship of Preparatory Year, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - A Baykal
- Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Sagar E Shirsath
- School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
| | - I Ercan
- Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - B Ozçelik
- Department of Physics, Faculty of Science and Letters, Cukurova University, 01330 Balcali, Adana, Turkey
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64
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Almessiere MA, Slimani Y, Guner S, Sertkol M, Demir Korkmaz A, Shirsath SE, Baykal A. Sonochemical synthesis and physical properties of Co 0.3Ni 0.5Mn 0.2Eu xFe 2-xO 4 nano-spinel ferrites. ULTRASONICS SONOCHEMISTRY 2019; 58:104654. [PMID: 31450334 DOI: 10.1016/j.ultsonch.2019.104654] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/17/2019] [Accepted: 06/21/2019] [Indexed: 05/24/2023]
Abstract
Nanoparticles (NPs) of composition Co0.3Ni0.5Mn0.2EuxFe2-xO4, where 0.00 ≤ x ≤ 0.10 (hereafter called CNMEuF) were synthesized by sonochemical approach using UZ SONOPULS HD 2070 ultrasonic homogenizer (frequency of 20 kHz and power of 70 W). As-synthesized samples were characterized thoroughly to determine the effects of europium ions (Eu3+) substitution on their structure, morphology and magnetic traits. Structural analyses of the synthesized NPs confirmed their high purity and crystalline cubic phases. Percent diffuse reflectance (%DR) data and Kubelka-Munk theory were exploited to evaluate the optical band gap energies of the studied CNMEuF NPs. Values of optical band gap energies obtained from the Tauc plots were observed in the range of 1.47-1.58 eV. The hysteresis loops (at room temperature and 10 K) of synthesized NPs were analyzed to determine their magnetic properties. These NPs disclosed superparamagnetic and hard ferrimagnetic character at room temperature and 10 K, respectively. With exception, the sample with x = 0.10 revealed soft ferrimagnetic behavior at 10 K. Eu3+ doping was shown to have significant influence on the structure and magnetic attributes of the proposed CNMEuF NPs. Values of various magnetic parameters of proposed compositions were reduced with the increase in Eu3+ dopant contents.
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Affiliation(s)
- M A Almessiere
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia; Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Y Slimani
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia.
| | - S Guner
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany
| | - M Sertkol
- Deanship of Preparatory Year, Building 450, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - A Demir Korkmaz
- Department of Chemistry, Istanbul Medeniyet University, 34700 Istanbul, Uskudar, Turkey
| | - Sagar E Shirsath
- School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
| | - A Baykal
- Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
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65
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Pal S, Azad UP, Singh AK, Kumar D, Prakash R. Studies on some spinel oxides based electrocatalysts for oxygen evolution and capacitive applications. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134584] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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66
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Abstract
Magnetic nanoparticles (MNP) composed of iron oxide (or other metal–FeO cores) coated with carbon produced by chemical vapour decomposition (CVD) were used in the photocatalytic ozonation of oxamic acid (OMA) which we selected as a model pollutant. The incorporation of Ag and Cu on FeO enhanced the efficiency of the process. The carbon phase significantly increased the photocatalytic activity towards the conversion of OMA. As for the synthesis process, raising the temperature of CVD improved the performance of the produced photocatalysts. The obtained results suggested that the carbon phase is directly related to high catalytic activity. The most active photocatalyst (C@FeO_CVD850) was used in the removal of other compounds (dyes, industrial pollutants and herbicides) from water and high mineralization levels were attained. This material was also revealed to be stable during reutilisation.
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67
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Magnetic Nanomaterials for Magnetically-Aided Drug Delivery and Hyperthermia. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9142927] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Magnetic nanoparticles have continuously gained importance for the purpose of magnetically-aided drug-delivery, magnetofection, and hyperthermia. We have summarized significant experimental approaches, as well as their advantages and disadvantages with respect to future clinical translation. This field is alive and well and promises meaningful contributions to the development of novel cancer therapies.
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68
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Ortiz-Quiñonez JL, Pal U. Borohydride-Assisted Surface Activation of Co 3O 4/CoFe 2O 4 Composite and Its Catalytic Activity for 4-Nitrophenol Reduction. ACS OMEGA 2019; 4:10129-10139. [PMID: 31460105 PMCID: PMC6648515 DOI: 10.1021/acsomega.9b00118] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/13/2019] [Indexed: 06/02/2023]
Abstract
Surface activation of catalysts is known to be an efficient process to enhance their activity in catalytic processes. The activation process includes the generation of oxygen vacancies, changing the nature of the catalyst surface from acidic to basic and vice versa, and the reduction of catalyst surface by H2. On the other hand, magnetically separable catalysts are highly beneficial for their utilization in water or biological fluid-based catalytic processes, as they can be easily guided to the target site and recovered. Here, we present the fabrication of CoFe2O4 and composites of Co3O4/CoFe2O4/α-Fe2O3 and Co/CoFe2O4/α-Fe2O3 through solution combustion process to utilize them as catalysts for 4-nitrophenol (4-NP) reduction. Although none of the as-prepared CoFe2O4 and Co3O4/CoFe2O4 was seen to be active in 4-NP reduction reaction, the surface of the composite gets activated by borohydride (NaBH4) treatment to act as a highly active catalyst for 4-NP reduction. X-ray photoelectron spectroscopy of the composite revealed the formation of metal-hydroxide (M-O-H) species of both Co and Fe at its surface due to borohydride treatment. The mechanism of the surface activation and the dynamics of 4-NP reduction of the surface-activated composite have been studied, proposing a possible pathway for the reduction of 4-NP.
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69
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Almessiere MA, Slimani Y, Korkmaz AD, Guner S, Sertkol M, Shirsath SE, Baykal A. Structural, optical and magnetic properties of Tm 3+ substituted cobalt spinel ferrites synthesized via sonochemical approach. ULTRASONICS SONOCHEMISTRY 2019; 54:1-10. [PMID: 30833194 DOI: 10.1016/j.ultsonch.2019.02.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/13/2019] [Accepted: 02/24/2019] [Indexed: 05/24/2023]
Abstract
Co-Tm nano-spinel ferrite with chemical formula CoTmxFe2-xO4 (0.0 ≤ x ≤ 0.08) NPs were prepared via sonochemical approach. X-ray powder diffraction patterns, microscopic images (SEM and TEM) and infrared spectra proved the formation of Co spinel ferrite. The effect of Tm3+ substituted on spinal structure was evaluated by lattice parameters, tetrahedral and octahedral bond length and cationic distribution. The band gap energy (Eg) of samples were estimated by performing UV-Vis percent diffuse reflectance (% DR) and applying the Kubelka-Munk theory. Eg values are in an interval between 1.33 eV and 1.64 eV. The analyses of magnetization were performed at room (300 K; RT) and low (10 K) temperatures. Different magnetic parameters including coercivity Hc, saturation magnetization Ms, remanence Mr, squareness ratio (SQR = Mr/Ms) and magnetic moment nB were deduced and discussed. The results showed superparamagnetic (SPM) nature at RT for x = 0.00 and 0.02 samples. However, the other products exhibit ferromagnetic (FM) nature. At 10 K, all synthesized NPs display FM behavior. An amazing increase in the magnitudes of Ms, Mr and Hc was observed at 10 K in comparison to RT, which is principally due to the reduced thermal fluctuations of magnetic moments at lower temperatures. The Tm3+ substitution affects considerably the magnetizations data. An enhancement in the Ms, Mr, and nB was detected on increasing the Tm3+ concentration. The SQR values at RT are found to be smaller than 0.5 postulating a single domain nature with uniaxial anisotropy for all produced ferrites. However, SQRs are in the range 0.66-0.76 at 10 K, suggesting the multi magnetic domain at low temperature, except the x = 0.02 product where the SQR = 0.47 indicating the single magnetic domain. The obtained magnetic results were investigated deeply with relation to structural and microstructural properties.
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Affiliation(s)
- M A Almessiere
- Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia; Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia.
| | - Y Slimani
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia.
| | - A D Korkmaz
- Department of Chemistry, Istanbul Medeniyet University, 34700 Istanbul, Uskudar, Turkey
| | - S Guner
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany
| | - M Sertkol
- Deanship of Preparatory Year Building 450, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Sagar E Shirsath
- School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
| | - A Baykal
- Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
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