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Abbasi A, Hamadanian M, Salavati-Niasari M, Mazhari MP. Hydrothermal synthesis, characterization and photodegradation of organic pollutants of CoCr2O4/Ag nanostructure and thermal stability of epoxy acrylate nanocomposite. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Strontium Removal in Seawater by Means of Composite Magnetic Nanoparticles Derived from Industrial Sludge. WATER 2016. [DOI: 10.3390/w8080357] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bitla Y, Chin YY, Lin JC, Van CN, Liu R, Zhu Y, Liu HJ, Zhan Q, Lin HJ, Chen CT, Chu YH, He Q. Origin of metallic behavior in NiCo2O4 ferrimagnet. Sci Rep 2015; 5:15201. [PMID: 26468972 PMCID: PMC4606736 DOI: 10.1038/srep15201] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 09/21/2015] [Indexed: 11/10/2022] Open
Abstract
Predicting and understanding the cation distribution in spinels has been one of the most interesting problems in materials science. The present work investigates the effect of cation redistribution on the structural, electrical, optical and magnetic properties of mixed-valent inverse spinel NiCo2O4(NCO) thin films. It is observed that the films grown at low temperatures (T < 400 °C) exhibit metallic behavior while that grown at higher temperatures (T > 400 °C) are insulators with lower ferrimagnetic-paramagnetic phase transition temperature. So far, n-type Fe3O4 has been used as a conducting layer for the spinel thin films based devices and the search for a p-type counterpart still remains elusive. The inherent coexistence and coupling of ferrimagnetic order and the metallic nature in p-type NCO makes it a promising candidate for spintronic devices. Detailed X-ray Absorption and X–ray Magnetic Circular Dichroism studies revealed a strong correlation between the mixed-valent cation distribution and the resulting ferrimagnetic-metallic/insulating behavior. Our study clearly demonstrates that it is the concentration of Ni3+ions and the Ni3+–O2−Ni2+ double exchange interaction that is crucial in dictating the metallic behavior in NCO ferrimagnet. The metal-insulator and the associated magnetic order-disorder transitions can be tuned by the degree of cation site disorder via growth conditions.
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Affiliation(s)
- Yugandhar Bitla
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Yi-Ying Chin
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | | | - Chien Nguyen Van
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Ruirui Liu
- Department of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Yuanmin Zhu
- Department of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Heng-Jui Liu
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Qian Zhan
- Department of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Hong-Ji Lin
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Chien-Te Chen
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Ying-Hao Chu
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan.,Institute of Physics, Academia Sinica, Taipei 105, Taiwan
| | - Qing He
- Department of Physics, Durham University, Durham DH1 3LE, United Kingdom
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Joseph A, Mathew S. Ferrofluids: Synthetic Strategies, Stabilization, Physicochemical Features, Characterization, and Applications. Chempluschem 2014. [DOI: 10.1002/cplu.201402202] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Tu YJ, Chang CK, You CF. Combustion of isopropyl alcohol using a green manufactured CuFe2O4. JOURNAL OF HAZARDOUS MATERIALS 2012; 229-230:258-264. [PMID: 22727486 DOI: 10.1016/j.jhazmat.2012.05.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 05/02/2012] [Accepted: 05/30/2012] [Indexed: 06/01/2023]
Abstract
A green method for manufacturing CuFe(2)O(4) from industrial Cu sludge was successfully developed by a combination of acid leaching, chemical exchange and ferrite process. The CuFe(2)O(4) was applied for combustion of volatile organic compounds (VOCs) derived from isopropyl alcohol (IPA). The results show that IPA was reacted to form intermediate acetone and CO(2) at the temperature range of 110-170°C. When the temperature was increased to 180°C, IPA can be 100% converted into CO(2). The 96-h decay tests indicated that the catalyst has a good thermal stability and durability under the conditions of gas hourly space velocity 30,000 h(-1), oxygen content 21%, IPA inlet concentration 2000 ppm, and reaction temperature 180°C. The results demonstrate great potential that our manufactured CuFe(2)O(4) catalyst can be used in combustion IPA streams to eliminate the emission of IPA.
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Affiliation(s)
- Yao-Jen Tu
- Earth Dynamic System Research Center, National Cheng-Kung University, No. 1, University Road, Tainan City 701, Taiwan, ROC.
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Wu E, Campbell SJ, Kaczmarek WA, Hofmann M, Kennedy SJ. Nanostructured (CoxFe1–x)3–yO4spinel – mechanochemical synthesis. ACTA ACUST UNITED AC 2003. [DOI: 10.3139/146.031127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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