After the hydrothermal synthesis of Dy-doped Bismuth Ferrite, I observed C-OH band in the FTIR spectrum, though the precursor solution does not have any carbon. Only Bi, Fe, Dy nitrates, and KOH were used. Where is the carbon contributed to it?
Is your sample exposed to air after synthesis? Adventitious carbon is typically present for samples exposed to air, might be this.
The presence of carbon can also be attributed to the adsorbtpion of CO2 gas. Is it possible that your sample is sensitive to CO2?
The FT-IR data can be repeted after the vaccume drying of the sample and very less exposure of air.
Presence of carbon sometimes shall be expected for samples which are not heat treated. though we are not adding carbon, it can be there as part of impurities.
@ Thorsten Schultz thanks for your answer. Yes, it was kept under ambient conditions.
Shiv Dutta Lawaniya Thanks. I think the sample is sensitive to CO2, as the XPS also showed the presence of C
Fahmida Sharmin If carbon is coming in your sample survey scan then definitely carbon is present in the sample. Further by identifying the oxidation state and matching it with literature, you can anticipate whether it is coming from CO2 adsorption or something else.
Carbon is present on the surface of all materials exposed to air. XPS shows this (indeed the 285 eV C 1s peak used to be used for charging correction). This can come from CO2 in the air as stated or from other organic material present in the laboratory (especially human handling - skin debris is one major component of laboratory dust).
I think Carbon is present in Bismuth-based metal-organic frameworks (Bi-MOFs), due to the adsorption of CO2 gas. Bismuth-based metal-organic frameworks (Bi-MOFs) are important for applications of gas separation. Due to the porous nature of Bi-MOFs, is sensitive to CO2
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