around 450 cm -1 Zn-O stretching found in the IR spectrum of ZnO nanoparticles.
http://iopscience.iop.org/0957-4484/14/1/303
FTIR spectrum range is correctly stated by Elbay and Samaer......along with this ZnO also shows specific fingerprint at 780 cm-1, and 1050 cm-1.
This two extra fingerprint has been shared by few research group in their work.,
Generally all the metals and its oxide, give the FT-IR peaks at lower wave number ranging from 400 to 800 cm-1.
now i am working on znO .I prepared ZnO at different substrate temperature ,ZnO stretching was found to be in range (400-420) cm−1 in "Characterization by FTIR -300 ,formattson instrument" for each temperature but when increased substrate temperature the Zn-O peak shifted to low wave number
Dear Saurav can you provide the any reference for ZnO specific fingerprint at 780 cm-1, and 1050 cm-1 as extra fingerprint
Dear Saurav could you please provide the any reference for ZnO specific fingerprint at 780 cm-1, and 1050 cm-1 ?
I have recently read that these shifts may be related to a change in the morphology of zinc oxide. Some papers treat this subject in a very interesting manner, following the theoretical and experimental data obtained for needle, tetrapod or spherical like shapes, with a specific reference to infrared spectra. Maybe it is a connection between the way your substrate react to the treatment temperature and the morphology of zinc oxide, it may be an effect of the substrate on the morphology that you did not consider. I think that some electron microscopy would be useful for you to evidence some morphology changes. In the articles I have read today, there was mentioned even some different wavenumbers for every type of morphology that zinc oxide is adopting.
For ZnO samples the absorption peaks in the range of 400 - 700 cm−1 could be attributed to the ZnO stretching modes.
1. Djaja, Nadia Febiana, Dionisius Agung Montja, and Rosari Saleh. "The effect of Co incorporation into ZnO nanoparticles." (2013).
2. A. Hernández, L. Maya, E. Sánchez-Mora and E. M. Sánchez, “Sol-Gel Synthesis, Characterization and Photocatalytic Activity of Mixed Oxide ZnO-Fe2O3,” Journal of Sol-Gel Science and Technology, Vol. 42, No. 1, 2007, pp. 71-78. doi:10.1007/s10971-006-1521-7
Anyone kindly go through it, give me a clear explanation and justification. I need it for my thesis related work.. Kindly give me a suggestion.
look forward to positive response
i worked on it ,The absorption peaks at
411-420 cm-1 this peak refers to stretching, vibration bond of Zn-O.
please open this link see page 37 this is my work
https://www.researchgate.net/publication/284837603_Preparation_and_Investigation_of_Photodetectors_based_on_ZnO_Crystals_Grown_on_Silicon_and_Porous_Silicon_Surfaces
Thesis Preparation and Investigation of Photodetectors based on ZnO...
I found this frequency (stretching) mode around 570 cm-1 in a ZnO/ZnS hetrostructure.
I found the FTIR peak for ZnO Nanoparticles at 449, 518, 612 and 681. so can any one suggest e is it of exactly ZnO Nps
Suppose a computational approach may be useful , what would its results mean to you ?
The sharp peak around 450 cm-1 can be attributed due to Zn-o stretching vibrations, but depending on synthesis and other experimental conditions, weak bands positioned at 520 cm-1, 566 cm-1 and 665 cm-1 are also possible to appear in FT-IR spectrum.
you may refer following papers
10.1016/j.ceramint.2017.03.201
http://www.sciencedirect.com/science/article/pii/S0272884217305886
10.1016/j.jallcom.2016.12.227
http://www.sciencedirect.com/science/article/pii/S0925838816341482
Hello all nice to so many info about ZnO. but I wish to know about the explanation of FTIR of ZnO adsorbed with Chromium and how to differentiate from ZnO.
FTIR is in all cases quite sensitive relative to the majority compound. For example, in our case the surface modification (even ethanol and water, OH) dominates the HATR spectra. Always a good idea is the same sample without the second compound.
Article Synthesis and testing of ZnO nanoparticles for photo-initiat...
I think you might want to know if the Cr ions are attached to the surface (and not that they have to be monitorable by IR). I suggest using a zeta-sizer and a pH below the point of zero charge for ZnO (e.g. puffer solution if necessary). If you add Cr ions which will absorb to the surface, the charge will be changed.
e.g. variation of surface charge
Article Functionalized polymer colloids bearing primary amino groups
if you doped the particles you might need the temper the samples and to perform XRD or TEM/XPS analysis. This might also be reasonable if you wash the samples with surface adsorbed Cr ions.
Last but not least you can also illuminate the samples and monitor the reduction of the Cr ions (after washing and before). (1st article)
The mentioned procedures will work for nearly all metall ions.
If zinc associate with any aromatic ring structure, then where we can expect the peak/
Very interesting answers. Thanks to all for such an informative discussions
Dear @ P. RAMESH ,
Zno peaks are also reported at 655 and 920.
check this please:
https://pubs.rsc.org/en/content/articlelanding/2014/tc/c4tc01056f#!divAbstract
ZnO absorption stretching was observed at around 887 cm-1, and the band at 605 cm-1 is the stretching mode of ZnO [17].
[17] K. Nakamoto, Infrared spectra of inorganic and
coordination compounds, Wiley, New York (1997).
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