I want to calculate the conduction band edge of my TiO2 sample having three phases making a heterostructure. I have got the band gap (nearly 3 eV) from UV-Vis spectroscopic analysis. I also have the values of valence band edge potential obtained from UPS (three edge values corresponding to the three phases). Hence i would like to know the conduction band edge to propose a band diagram which shows how the band edges of these three phases are alligned..