Formation of shape-selective magnetic cobalt oxide nanowires: environmental application in catalysis studies
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Formation of shape-selective magnetic cobalt oxide
nanowires: environmental application in catalysis
studies
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| Creator |
Kundu, S.
Mukadam, M.D. Yusuf, S.M. Jayachandran, M. |
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| Subject |
Nanotechnology
Electrochemical Materials Science |
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| Description |
A new route for the formation of shape-selective CoO nanowires has been developed using a simple
microwave (MW) heating method. The reduction of Co(II) ions was done using a new reducing agent
alkaline 2,7-dihydroxy naphthalene (2,7-DHN) in cetyltrimethylammonium bromide (CTAB) micellar media.
The reaction mixture was irradiated using MW for a total time of 6 min. The process exclusively generates
CoO nanowires of different lengths and having diameter y5 ¡ 2 nmto 15 ¡ 2 nm range just by tuning
the metal-ion-to-surfactant molar ratios and changing the other reaction parameters. Magnetization
measurements indicate that there is no observable coercivity for the short nanowires, but the coercivity
increases as the length of the nanowires increases although the magnetic moment values at the maximum
applied magnetic field of 2 T decreased with an increase in the length of the nanowires. The synthesized
CoO nanowires are found to serve as an effective catalyst for the mineralization of several organic dye
molecules in the presence of NaBH4 in a short reaction time. The process assists the room temperature
mineralization of the dyes and provides a cleanup measure of dye contaminated water bodies even in the
presence or in the absence of light. The yield of the CoO nanowires with uniform shapes is found to be
significantly high (.95%) and the nanowires are stable for more than a month under ambient conditions.
The proposed synthesis method is efficient, straightforward, reproducible, and robust. Other than in
catalysis, the cobalt oxide nanomaterials can also be applied for making pigments, lithium-ion battery
materials, solid state sensors, or as anisotropy source for magnetic recording
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| Publisher |
Royal Society of Chemistry
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| Date |
2013
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3009/1/039-2013.pdf
Kundu, S. and Mukadam, M.D. and Yusuf, S.M. and Jayachandran, M. (2013) Formation of shape-selective magnetic cobalt oxide nanowires: environmental application in catalysis studies. CrystEngComm, 15. pp. 482-497. |
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| Relation |
http://cecri.csircentral.net/3009/
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