I would like to identify Zirconia in a Zirconia-Polyethyleneimine comosite coating. Some peaks have been attributed to hydroxyl bonds of hydrous zirconia in papers, but in fact, I have not seen any specific range introduced for characteristic peaks of Zr-OH bonds. The other problem is that I am trying to characterize an inorganic-organic composite (ZrO2-PEI) and some peaks of two materials may overlap with each other and this might be confusing and in summary the results of FTIR spectrum of this composite material seems difficult to me.