Structural transformation from Mn{sub 3}O{sub 4} nanorods to nanoparticles and band gap tuning via Zn doping
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032 (India)
- Thin Film and NanoScience Laboratory, Department of Physics, Jadavpur University, Kolkata 700032 (India)
Highlights: Black-Right-Pointing-Pointer Successful doping of Zn in Mn{sub 3}O{sub 4} nanorod has been done by simple hydrothermal method. Black-Right-Pointing-Pointer Increase of Zn doping encouraged the formation of Mn{sub 3}O{sub 4} nanoparticle out of Mn{sub 3}O{sub 4} nanorod. Black-Right-Pointing-Pointer The energy band gap of Mn{sub 3}O{sub 4} nanorod increased continuously with the increase of Zn doping concentration. -- Abstract: Synthesis of undoped and Zn doped hausmannite Mn{sub 3}O{sub 4} nanorods was achieved through a simple hydrothermal route. Scanning electron microscopic studies showed that due to in situ Zn doping a structural deformation from Mn{sub 3}O{sub 4} nanorods to a mixture of Mn{sub 3}O{sub 4} nanorods and nanoparticles occurred. The amount of nanoparticles in the mixture increased with the increase of doping percentage. X-ray diffraction studies, transmission electron microscopy and selected area electron diffraction pattern revealed that both the nanorods and the nanoparticles were hausmannite Mn{sub 3}O{sub 4}. X-ray photoelectron spectroscopic studies confirmed successful zinc doping in Mn{sub 3}O{sub 4}. Microscopic studies revealed that the average diameters of Mn{sub 3}O{sub 4} nanorods and nanoparticles were of 200 nm and 70 nm, respectively. The possible growth mechanism and the reasons behind the formation of nanoparticles along with nanorods are discussed briefly. UV-vis spectroscopic studies showed a continuous increase in the energy bandgap of Mn{sub 3}O{sub 4} with the increase in Zn doping percentage.
- OSTI ID:
- 22212473
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 3; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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