I tried to coat a ligand layer on the surface of the TiO2 thin film using an oil bath reflux system at 40 degrees Celsius for 24 hours. Previously, I observed the NH2 peak at 1250 cm-1 in FTIR analysis. Currently, I'm unable to determine the repeatability of past data. I'm using DMF solvent. I also tried different parameters like temperature, time, concentration, and solvent.
Can anyone explain what is happening here? If my TiO2 surface is changed, or are there any mistakes from my side? I would like to get advice from people with similar experiences or related experts.
Dear Vennela Tirupati The appearance of the NH2 peak suggests that the ligand (NH2-BDC) has indeed interacted with the TiO2 surface. This modification could lead to changes in surface properties, such as wettability, reactivity, or electronic structure.
Use XPS or AFM for characterization, and adjust parameters like temperature, time, and ligand concentration to optimize ligand coverage and surface changes.Higher temperatures can improve ligand adsorption, but excessive heat can potentially lead to ligand desorption.
- Liu, J., & Wuwei, P. R. (2015). Electronic and Optical Properties of Surface-Anchored Metal-Organic Frameworks (Doctoral dissertation, KIT-Bibliothek).
- Kim, S., Hidayat, R., Roh, H., Kim, J., Kim, H. L., Khumaini, K., ... & Lee, W. J. (2022). Atomic layer deposition of titanium oxide thin films using a titanium precursor with a linked amido-cyclopentadienyl ligand. Journal of Materials Chemistry C, 10(17), 6696-6709.
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