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Abarna ST, Ezhil Vizhi R. Tuning the magnetic properties of hard-soft Ba 0.5Sr 0.5Fe 10Al 2O 19and Ni 0.1Co 0.9Fe 2O 4nanocomposites via one pot sol-gel auto combustion method for permanent magnet applications. NANOTECHNOLOGY 2024; 35:205707. [PMID: 38350122 DOI: 10.1088/1361-6528/ad28d5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/13/2024] [Indexed: 02/15/2024]
Abstract
Permanent magnets generate magnetic fields that can be sustained when a reverse field is supplied. These permanent magnets are effective in a wide range of applications. However, strategic rare-earth element demand has increased interest in replacing them with huge energy product (BH)max. Exchange-coupled hard/soft ferrite nanocomposites have the potential to replace a portion of extravagant rare earth element-based magnets. In the present, we have reported the facile auto combustion synthesis of exchange-coupled Ba0.5Sr0.5Fe10Al2O19and Ni0.1Co0.9Fe2O4nanocomposites by increasing the content of soft ferrite over the hard fromx= 0.1 to 0.4 wt%. The XRD combined with Rietveld analysis reflected the presence of hexaferrite and spinel ferrite without the existence of secondary phases. The absorption bands from the Fourier transform infrared spectrum analysis proved the presence of M-O bonds in tetrahedral sites and octahedral sites. Rod and non-spherical images from TEM represent the hexaferrite and spinel ferrite. The smoothM-Hcurve and a single peak of the switching field distribution curve prove that the material has undergone a good exchange coupling. The nanopowders displayed an increase in saturation magnetization and a decrease in coercivity with the increases in the spinel content. The prepared nanocomposites were showing higher energy products. The composite with the ratiox= 0.2 displayed a higher value of (BH)maxof 13.16 kJ m-3.
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Affiliation(s)
- S T Abarna
- Materials Research Laboratory, Centre for Functional Materials, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
- Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - R Ezhil Vizhi
- Materials Research Laboratory, Centre for Functional Materials, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
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2
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Viltres H, Gupta NK, Paz R, Dhavale RP, Park HH, Leyva C, Srinivasan S, Rajabzadeh AR. Mercury remediation from wastewater through its spontaneous adsorption on non-functionalized inverse spinel magnetic ferrite nanoparticles. ENVIRONMENTAL TECHNOLOGY 2024; 45:1155-1168. [PMID: 36263910 DOI: 10.1080/09593330.2022.2138787] [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: 08/11/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
In this study, inverse spinel cubic ferrites MFe2O4 (M = Fe2+, and Co2+) have been fabricated for the high-capacity adsorptive removal of Hg(II) ions. The PXRD analysis confirmed ferrites with the presence of residual NaCl. The surface area of Fe3O4 (Fe-F) and CoFe2O4 (Co-F) material was 69.1 and 45.2 m2 g-1, respectively. The Co-F and Fe-F showed the maximum Hg(II) adsorption capacity of 459 and 436 mg g-1 at pH 6. The kinetic and isotherms models suggested a spontaneous adsorption process involving chemical forces over the ferrite adsorbents. The Hg(II) adsorption process, probed by X-ray photoelectron spectroscopy (XPS), confirmed the interaction of Hg(II) ions with the surface hydroxyl groups via a complexation mechanism instead of proton exchange at pH 6 with the involvement of chloride ions. Thus, this study demonstrates a viable and cost-effective solution for the efficient remediation of Hg ions from wastewater using non-functionalized ferrite adsorbents. This study also systematically investigates the kinetics and isotherm mechanism of Hg(II) adsorption onto ferrites and reports one of the highest Hg(II) adsorption capacities among other ferrite-based adsorbents.
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Affiliation(s)
- Herlys Viltres
- School of Engineering Practice and Technology, McMaster University, Hamilton, Ontario, Canada
| | - Nishesh Kumar Gupta
- Department of Environmental Research, University of Science and Technology (UST), Daejeon, Korea
- Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Korea
| | - Roxana Paz
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, CDMX, Mexico
| | - Rushikesh P Dhavale
- Department of Materials Science and Engineering, Yonsei University, Seoul, South Korea
| | - Hyung-Ho Park
- Department of Materials Science and Engineering, Yonsei University, Seoul, South Korea
| | - Carolina Leyva
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, CDMX, Mexico
| | - Seshasai Srinivasan
- School of Engineering Practice and Technology, McMaster University, Hamilton, Ontario, Canada
| | - Amin Reza Rajabzadeh
- School of Engineering Practice and Technology, McMaster University, Hamilton, Ontario, Canada
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3
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Sivaranjani T, Rajakarthihan S, Bharath G, Haija MA, Banat F. An advanced photo-oxidation process for pharmaceuticals using plasmon-assisted Ag-CoFe 2O 4 photocatalysts. CHEMOSPHERE 2023; 341:139984. [PMID: 37657696 DOI: 10.1016/j.chemosphere.2023.139984] [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: 05/04/2023] [Revised: 07/25/2023] [Accepted: 08/25/2023] [Indexed: 09/03/2023]
Abstract
The discharge of amoxicillin (AMX) from pharmaceutical intermediates has adverse effects on aquatic ecosystems. The elimination of AMX requires advanced oxidation processes (AOPs) that utilize high-performance photocatalysts. Furthermore, the design of highly visible light photocatalysts for AOPs demands both cost-effectiveness and efficiency. In this work, a plasmon-assisted visible light photocatalyst of 2D Ag-CoFe2O4 nanohybrids was successfully synthesized and characterized with several analytical tools to degrade AMX in aqueous solutions through advanced AOPs. The results showed that the Ag-CoFe2O4 nanohybrids had excellent photocatalytic activity and stability, which could efficiently reduce the AMX concentration by 99% within 70 min under visible light irradiation. In particular, CoFe2O4 and Ag have an interfacial contact that prevents electron-hole pair recombination more effectively than pure CoFe2O4, which results in electrons in its conduction band (CB) migrating to metallic Ag sites. Thus, charge transfers between the two materials are more efficient, leading to higher photocatalytic oxidation of AMX. Furthermore, the surface plasmon of Ag nanoparticles are excited by their plasmonic resonance, which increases the absorption of visible light. The plasmon-assisted visible light photocatalyst could replace expensive and energy-intensive advanced oxidation processes (AOPs). AOPs pathways associated with AMX have been discussed in detail. The HPLC chromatogram clearly showed AMX was oxidized by four-membered B-lactam ring opening and hydroxylation with •OH. 2D Ag-CoFe2O4 heterostructure was found to be efficient, selective, and cost-effective for the degradation of several pharmaceutical compounds. Additionally, it was found to be eco-friendly and sustainable, making it a viable alternative to AOPs.
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Affiliation(s)
- T Sivaranjani
- Department of Physics, Thiagarajar College (Affiliated to Madurai Kamaraj University), Madurai, Tamil Nadu, 625009, India
| | - S Rajakarthihan
- Department of Physics, Thiagarajar College (Affiliated to Madurai Kamaraj University), Madurai, Tamil Nadu, 625009, India.
| | - G Bharath
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Mohammad Abu Haija
- Department of Chemistry, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates; Advanced Materials Chemistry Center (AMCC), Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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Bui NT, Le LC, Hoang TT, Nguyen HT, Tran NTT, Hoang TKA. Effective aqueous chromate treatment using triethanolamine anacardate coated magnetic nanoparticles. ENVIRONMENTAL RESEARCH 2023; 226:115675. [PMID: 36906268 DOI: 10.1016/j.envres.2023.115675] [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: 12/08/2022] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
Low-cost adsorbents derived from agricultural by-products incorporated magnetic nanoparticles (NPs) are promising for wastewater treatment. They are always preferred due to their great performance and easy separation. This study reports cobalt superparamagnetic (CoFe2O4) nanoparticles (NPs) incorporated with triethanolamine (TEA) based surfactants from cashew nut shell liquid, namely TEA-CoFe2O4, for the removal of chromium (VI) ions from aqueous solutions. To have detailed characteristics of the morphology and structural properties, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM) were employed. The fabricated TEA-CoFe2O4 particles exhibit soft and superparamagnetic properties, which make the nanoparticles easily recycled by using a magnet. Chromate adsorption on the TEA-CoFe2O4 nanomaterials reached an optimal efficiency of 84.3% at pH = 3 with the initial adsorbent dose of 10 g/L and chromium (VI) concentration of 40 mg/L. The TEA-CoFe2O4 nanoparticles can maintain the effective adsorption of chromium (VI) ion (by 29% of efficiency loss) and retain the magnetic separation using a magnet up to three cycles of the regeneration, which promise a high potential of this low-cost adsorbent for long-term treatment of heavy metal ions from polluted waters.
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Affiliation(s)
- Nghia Tan Bui
- Faculty of Food Science and Technology, Ho Chi Minh City University of Food Industry, Ho Chi Minh, Viet Nam
| | - Linh Chi Le
- Department of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh, Viet Nam
| | - Thanh T Hoang
- Department of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh, Viet Nam
| | - Hang Thi Nguyen
- Faculty of Garment Technology - Fashion, Industrial University of Ho Chi Minh City, Ho Chi Minh, Viet Nam
| | | | - Tuan K A Hoang
- Hydro-Quebec Research Institute, 1800 Boulevard Lionel-Boulet, Varennes, QC J3X 1S1, Canada
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Manh DH, Thanh TD, Phan TL, Yang DS. Towards hard-magnetic behavior of CoFe 2O 4 nanoparticles: a detailed study of crystalline and electronic structures, and magnetic properties. RSC Adv 2023; 13:8163-8172. [PMID: 36922942 PMCID: PMC10009764 DOI: 10.1039/d3ra00525a] [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: 01/25/2023] [Accepted: 03/05/2023] [Indexed: 03/18/2023] Open
Abstract
We have used the coprecipitation and mechanical-milling methods to fabricate CoFe2O4 nanoparticles with an average crystallite size (d) varying from 81 to ∼12 nm when changing the milling time (t m) up to 180 min. X-ray diffraction and Raman-scattering studies have proved the samples crystalizing in the spinel structure. Both the lattice constant and residual strain tend to increase when t m(d) increases (decreases). The analysis of magnetization data has revealed a change in the coercivity (H c) towards the hard-magnetic properties. Specifically, the maximum H c is about 2.2 kOe when t m = 10 min corresponding to d ≈ 29 nm; beyond this t m(d) value, H c gradually decreases. Meanwhile, the increase of t m always reduces the saturation magnetization (M s) from ∼69 emu g-1 for t m = 0 to 35 emu g-1 for t m = 180 min. The results collected as analyzing X-ray absorption data have indicated a mixed valence state of Fe2+,3+ and Co2+ ions. We think that the migration and redistribution of these cations between the tetrahedral and octahedral sites together with lattice distortions and defects induced by the milling process have impacted the magnetic properties of the CoFe2O4 nanoparticles.
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Affiliation(s)
- D H Manh
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Viet Nam
| | - T D Thanh
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Viet Nam
| | - T L Phan
- Department of Physics, Hankuk University of Foreign Studies Yongin 449-791 South Korea.,Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology 144 Xuan Thuy, Cau Giay Ha Noi Viet Nam
| | - D S Yang
- Department of Science Education, Chungbuk National University Cheongju 360-763 South Korea
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6
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Kharat SP, Gaikwad SK, Kambale RC, Kolekar YD, Ramana CV. Correlation between Cation Distribution and Magnetic and Dielectric Properties of Dy 3+-Substituted Fe-Rich Cobalt Ferrite. Inorg Chem 2022; 61:19319-19332. [DOI: 10.1021/acs.inorgchem.2c03125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Shahaji P. Kharat
- Department of Physics, Savitribai Phule Pune University, Pune411007, Maharashtra, India
- Department of Physics, Fergusson College (Autonomous), Pune411004, Maharashtra, India
| | - Swati K. Gaikwad
- Department of Physics, Savitribai Phule Pune University, Pune411007, Maharashtra, India
- Department of Physics, Fergusson College (Autonomous), Pune411004, Maharashtra, India
| | - Rahul C. Kambale
- Department of Physics, Savitribai Phule Pune University, Pune411007, Maharashtra, India
| | - Yesh D. Kolekar
- Department of Physics, Savitribai Phule Pune University, Pune411007, Maharashtra, India
| | - C. V. Ramana
- Center for Advanced Materials Research (CMR), University of Texas at El Paso, El Paso, Texas79968, United States
- Department of Mechanical Engineering, University of Texas at El Paso, El Paso, Texas79968, United States
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7
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Ansari SM, Sinha BB, Sen D, Sastry PU, Kolekar YD, Ramana CV. Effect of Oleylamine on the Surface Chemistry, Morphology, Electronic Structure, and Magnetic Properties of Cobalt Ferrite Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3015. [PMID: 36080053 PMCID: PMC9458106 DOI: 10.3390/nano12173015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/12/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
The influence of oleylamine (OLA) concentration on the crystallography, morphology, surface chemistry, chemical bonding, and magnetic properties of solvothermal synthesized CoFe2O4 (CFO) nanoparticles (NPs) has been thoroughly investigated. Varying OLA concentration (0.01-0.1 M) resulted in the formation of cubic spinel-structured CoFe2O4 NPs in the size-range of 20-14 (±1) nm. The Fourier transform spectroscopic analyses performed confirmed the OLA binding to the CFO NPs. The thermogravimetric measurements revealed monolayer and multilayer coating of OLA on CFO NPs, which were further supported by the small-angle X-ray scattering measurements. The magnetic measurements indicated that the maximum saturation (MS) and remanent (Mr) magnetization decreased with increasing OLA concentration. The ratio of maximum dipolar field (Hdip), coercivity (HC), and exchanged bias field (Hex) (at 10 K) to the average crystallite size (Dxrd), i.e., (Hdip/Dxrd), (HC/Dxrd), and (Hex/Dxrd), increased linearly with OLA concentration, indicating that OLA concurrently controls the particle size and interparticle interaction among the CFO NPs. The results and analyses demonstrate that the OLA-mediated synthesis allowed for modification of the structural and magnetic properties of CFO NPs, which could readily find potential application in electronics and biomedicine.
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Affiliation(s)
- Sumayya M. Ansari
- Department of Physics, Savitribai Phule Pune University, Pune 411 007, Maharashtra, India
| | - Bhavesh B. Sinha
- National Center for Nanoscience and Nanotechnology, University of Mumbai, Mumbai 400 032, Maharashtra, India
| | - Debasis Sen
- Bhabha Atomic Research Centre (BARC), Solid State Physics Division, Mumbai 400 085, Maharashtra, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, Maharashtra, India
| | - Pulya U. Sastry
- Bhabha Atomic Research Centre (BARC), Solid State Physics Division, Mumbai 400 085, Maharashtra, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, Maharashtra, India
| | - Yesh D. Kolekar
- Department of Physics, Savitribai Phule Pune University, Pune 411 007, Maharashtra, India
| | - C. V. Ramana
- Centre for Advanced Materials Research (CMR), University of Texas, El Paso, TX 79968, USA
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8
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Synthesis and characterization of Co xFe 1-xFe 2O 4 nanoparticles by anionic, cationic, and non-ionic surfactant templates via co-precipitation. Sci Rep 2022; 12:4611. [PMID: 35301403 PMCID: PMC8931099 DOI: 10.1038/s41598-022-08709-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/11/2022] [Indexed: 11/08/2022] Open
Abstract
The cobalt ferrite nanoparticles (CoxFe1-xFe2O4) were synthesized by the surfactant templated co-precipitation method using various surfactants namely sodium dodecyl sulfate (SDS), hexadecyltrimethylammonium bromide (CTAB), and Tween20. Under the substitution, the CoxFe1-xFe2O4 particles were synthesized at various Co2+ and Fe2+ mole ratios (x = 1, 0.6, 0.2, and 0) with the SDS. The cobalt ferrite nanoparticles were characterized for their morphology, structure, magnetic, and electrical properties. All CoxFe1-xFe2O4 nanoparticles showed the nanoparticle sizes varying from 16 to 43 nm. In the synthesis of CoFe2O4, the SDS template provided the smallest particle size, whereas the saturated magnetization (Ms) of CoFe2O4 was reduced by using CTAB, SDS, and Tween20. For the CoxFe1-xFe2O4 as synthesized by the SDS template at 1.2 CMC, the Ms increased with increasing Fe2+ mole ratio. The highest Ms of 100.4 emu/g was obtained from the Fe3O4 using the SDS template. The Fe3O4 nanoparticle is potential to be used in various actuator and biomedical devices.
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Refat NM, Nassar MY, Sadeek SA. A controllable one-pot hydrothermal synthesis of spherical cobalt ferrite nanoparticles: synthesis, characterization, and optical properties. RSC Adv 2022; 12:25081-25095. [PMID: 36199874 PMCID: PMC9443479 DOI: 10.1039/d2ra03345c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/25/2022] [Indexed: 12/26/2022] Open
Abstract
We herein report the controllable synthesis of spherical cobalt ferrite nanoparticles with average crystallite size in the range of 3.6–12.9 nm using a facile, eco-friendly, hydrothermal method. The hydrothermal treatment was carried out by utilizing cobalt nitrate, ferric nitrate, and ammonium hydroxide in the presence and absence of Arabic gum as a surfactant agent. The purity and crystallinity of the products were tuned by varying reaction conditions such as reaction time (0.5–8 h), reaction temperature (120–180 °C), percentage of ethylene glycol (0–100% (v/v)), pH (8–9.6), and amount of Arabic gum (0–2 g). We characterized the prepared products using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy analysis (EDS), selected area electron diffraction (SAED) patterns, and UV-visible diffuse reflectance spectra (DRS). The optimal hydrothermal treatment was performed at 180 °C and pH 9.6 for 4 h in aqueous media. The results also revealed that the as-prepared spinel cobalt ferrite nanoparticles have an estimated optical band gap energy in the range of ca. 1.6–1.9 eV, indicating the semiconducting characteristics of the products. A controllable synthesis of spherical cobalt ferrite nanoparticles with average crystallite size in the range of 3.6–12.9 nm using a facile, eco-friendly, hydrothermal method.![]()
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Affiliation(s)
- Nedaa M. Refat
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Mostafa Y. Nassar
- Chemistry Department, Faculty of Science, Benha University, Benha 13518, Egypt
| | - Sadeek A. Sadeek
- Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
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Fast and Efficient Removal of Uranium onto a Magnetic Hydroxyapatite Composite: Mechanism and Process Evaluation. Processes (Basel) 2021. [DOI: 10.3390/pr9111927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The exploration and rational design of easily separable and highly efficient sorbents with satisfactory capability of extracting radioactive uranium (U)-containing compound(s) are of paramount significance. In this study, a novel magnetic hydroxyapatite (HAP) composite (HAP@ CoFe2O4), which was coupled with cobalt ferrite (CoFe2O4), was rationally designed for uranium(VI) removal through a facile hydrothermal process. The U(VI) ions were rapidly removed using HAP@ CoFe2O4 within a short time (i.e., 10 min), and a maximum U(VI) removal efficiency of 93.7% was achieved. The maximum adsorption capacity (Qmax) of the HAP@CoFe2O4 was 338 mg/g, which demonstrated the potential of as-prepared HAP@CoFe2O4 in the purification of U(VI) ions from nuclear effluents. Autunite [Ca(UO2)2(PO4)2(H2O)6] was the main crystalline phase to retain uranium, wherein U(VI) was effectively extracted and immobilized in terms of a relatively stable mineral. Furthermore, the reacted HAP@CoFe2O4 can be magnetically recycled. The results of this study reveal that the suggested process using HAP@CoFe2O4 is a promising approach for the removal and immobilization of U(VI) released from nuclear effluents.
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Ahmed T, Noman M, Manzoor N, Ali S, Rizwan M, Ijaz M, Allemailem KS, BinShaya AS, Alhumaydhi FA, Li B. Recent advances in nanoparticles associated ecological harms and their biodegradation: Global environmental safety from nano-invaders. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2021; 9:106093. [DOI: 10.1016/j.jece.2021.106093] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
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12
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Joseph XB, Umesh NM, Wang SF, Jesila JA. CoFe 2O 4 supported g-C 3N 4 nanocomposite for the sensitive electrochemical detection of dopamine. NEW J CHEM 2021. [DOI: 10.1039/d1nj02188e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The CoFe2O4@g-CN modified electrode has been applied for the real-time detection of DA in human biological samples with appreciable recovery results.
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Affiliation(s)
- Xavier Benadict Joseph
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taiwan
| | - N. M. Umesh
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taiwan
| | - Sea-Fue Wang
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taiwan
| | - J. Antolin Jesila
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taiwan
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Freire RM, Palma JL, Michea S, Ramirez R, Baltazar SE, Denardin JC. Coercivity dependence of cation distribution in Co-based spinel: correlating theory and experiments. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01129k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The inversion degree of a spinel-type nanomaterial is an essential parameter to understand the magnetic and electronic properties of ferrites. By micromagnetic simulations, we were able to connect DFT calculations and experiments for CoFe2O4 NPs.
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Affiliation(s)
- R. M. Freire
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Instituto de Ciencias Químicas Aplicadas
| | - J. L. Palma
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Escuela de Ingeniería
| | - S. Michea
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Instituto de Ciencias Químicas Aplicadas
| | - R. Ramirez
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
| | - S. E. Baltazar
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Departamento de Física
| | - J. C. Denardin
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Santiago
- Chile
- Departamento de Física
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