Photocatalytic degradation of organic compounds over g-C3N4/Nb2O5 heterostructures.

Reference	Presenter	Authors (Institution)	Abstract
05-008	Gelson Tiago dos Santos Tavares da Silva	da Silva, G.T.(Federal University of São Carlos /Brazilian Agricultural Research Corporation); Carvalho, K.T.(Brazilian Agricultural Research Corporation); Lopes, O.F.(University of Sao Paulo); Ribeiro, C.(Federal University of São Carlos /Brazilian Agricultural Research Corporation);	In this study, g-C3N4/Nb2O5 heterostructures were successfully prepared by a sonochemical method based on surface charge-induced heteroaggregation. Under visible irradiation, the heterostructured g-C3N4/ Nb2O5 samples exhibited higher activity in the photooxidation of the drug amiloride (AML) and rhodamine B dye (RhB), compared to the pure g-C3N4 and Nb2O5 phases. The enhanced photocatalytic activity of the heterostructures could be attributed to the effective formation of heterojunctions between the g-C3N4 and Nb2O5 semiconductors, causing the migration of photogenerated electrons and holes, hence increasing their lifetimes, which can be confirmed by time-resolved photoluminescence, in which the 3CN:1Nb heterostructure showed the longest electron/hole pair lifetime. In summary, the combination of g-C3N4 with Nb2O5 to produce a type-II heterostructure is a good strategy to overcome important challenges in photocatalysis.
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