Does having 2 absorption edges in UV Vis spectrum means that the heterogenous composite is not subjected to highly efficient heterojunction?

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Hi,

Does having 2 absorption edges in UV Vis spectrum means that the heterogenous composite is not subjected to highly efficient heterojunction? I have a composite made up of g-C3N4 and TiO2. Most researchers reported that only 1 absorption edge was observed in the UV Vis spectrum for the same composite. But I found that my composite has 2 absorption edge. Why?

Abdelhak Maghchiche

Two absorption edges in a g-C3N4/TiO2 composite UV-Vis spectrum reflect the distinct band gaps of each component, indicating incomplete electronic coupling rather than necessarily inefficient heterojunction formation.

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