Generally we are taking raman spectra upto 100 to 800 cm-1 but material is disordered you will get peak for Ti-H peaks at 1200-1600 cm-1 also but at the same region place carbon is also giving the peak how will you justify that in your sample carbon for D & G band same region peak are coming it is not present and this peak are due to Ti-H bond. I am not getting more reference for that and please do not give explanation to do H1NMR and IR to prove Ti-H bond.
Please the ppt.
I'm a bit puzzled by your graph in the attachment - the x-axis says "Wavelength (nm)" when I expected "Raman Shift (cm^-1)" -- is this the correct graph?
Can you also explain what is the source of hydrogen put into TiO2 that causes you to suspect Ti-H formation?
(On your data: the graph mentions "white TiO2" and "black TiO2" with the white showing nice, sharp band shapes, and the black showing some evidence of black body radiation. This would happen if you have carbon black (for example) which absorbs your laser radiation and re-emits broadly. So my opinion is, you would not want to analyze this black TiO2 Raman spectrum, as you may be looking at a lot of artifacts on the black spectrum. TiO2 has infrared-active bands, so you might even compare the white and black samples on an infrared spectrometer).
yeah Sorry Kaoru Aou it is Raman shift(cm-1) but i got some paper in which they are showing their is Ti-H mode strectching in 1200 to 1600 cm-1. Can you help me having any reference for IR for Black TiO2
I've not seen an IR spectrum for black TiO2, but white TiO2 FT-infrared is known in the literature. Try google: "TiO2 infrared" and you'll see a lot of hits, including Images. I do agree with the Ti-H stretching being around the range you indicate (It is in agreement with TiH2 and TiH4 vibrational energy levels indicated in the NIST Webbook online)
Respected Kaoru Sir , Kindly I request you if you got any justification to explain thing on behalf of raman between this range send me that link. I am sending you one paper their it is clealrly mentioned but more paper I need to convince my justification. Please see the paper.
I understand your concern, however based on the spectra you attached originally, I don't know if the data for the black TiO2 is something you want to base decisions on.
Thank you for the paper you attached, it certainly helps to see where you're coming from regarding doing your own Raman measurements. As you highlighted in page 200, both anatase and rutile TiO2 are described as D4h and so have inversion symmetry so that there are Raman- and IR-active modes that are mutually exclusive. However, you are asking about confirming Ti-H bond formation. The presence of Ti-H would break the inversion symmetry, and a Ti-H bond stretch will have strong infrared activity (since the vibrational mode would have a strong dipole derivative). So if Ti-H bond stretch shows up on Raman, it should be very intense on the infrared spectrum.
As per my original suggestion, I would recommend getting an infrared spectrum if an appropriate spectrometer is available - I am thinking for example of a reflection-absorption mode, which you could do if there is an infrared microscope where you can do a "single bounce" reflection-absorption (note, this is *not* the same as ATR).
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