On the study of pH effects in the microwave enhanced rapid synthesis of nano-ZnO
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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Title |
On the study of pH effects in the microwave enhanced rapid
synthesis of nano-ZnO
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Creator |
Gopalram, S.D.
Anbukulandainathan, M. Ravi, G. |
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Subject |
Electroorganic
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Description |
The rapid synthesis of ZnO nanostructures by
microwave treatment of aqueous solutions of different pH
values is reported for the first time. Microwave in various
wattages was used as the source of heating or energy feeding
the aqueous precursors. The pH of the zinc metal source
was altered by a suitable amount of mineralisers. The considered
pH values are 8, 10, 12 and 13.5. Microwave dielectric
heating is dependent on the ability of the material to
absorb microwave. This is responsible for molecular friction
and dielectric loss, which as a result produce internal heating
of the dielectric medium, in this case the solution. In typical
microwave assisted synthesis, the total exposure to the
microwave treatment was near about 25 to 35 minutes. The
ZnO nanostructures obtained were studied by XRD, SEM
and TEM characterisations. From the XRD pattern and the
full width half maximum of the dominant reflections, microstructural
parameters of the nanostructures are calculated
and compared for the different pH values. Flower petal like
flakes and hexagonal nanorods are formed for the lower and
higher pH solutions, respectively. From the SEM images, the
size distributions for the pH 12 and 13.5 cases are compared
by drawing a histogram.
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Publisher |
Springer-Verlag
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Date |
2010
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://cecri.csircentral.net/159/1/2010-006.pdf
Gopalram, S.D. and Anbukulandainathan, M. and Ravi, G. (2010) On the study of pH effects in the microwave enhanced rapid synthesis of nano-ZnO. Applied Physics A, 99. pp. 197-203. |
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Relation |
http://cecri.csircentral.net/159/
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