n order to gain insights into the chemical structure of GO andGO–Fe2O3catalyst, FT-IR spectroscopy was used to investigatethe existence of oxygen-containing functionalities and theirchanges after impregnation. The FT-IR spectrum of GO(Fig. 4) exhibits the characteristic peaks for C@O(1719 cm1), aromatic C@C (1621 cm1), carboxy C–O(1417 cm1), epoxy C–O (1223 cm1) and alkoxy C–O(1053 cm1). The GO–Fe2O3catalyst also contains these func-tional groups, but the positions of the bonds are slightly redshifted and sharpness of the peaks is changed indicatingthe change in the coordination environment of various func-tional groups in GO–Fe2O3[38]. The peak at 1719 cm1corre-sponding to C@O bonding of –COOH was weaker than thatof GO due to the formation of COOafter coating withFe2O3. Moreover, the peaks at 535 cm1can be ascribed toFe–O in Fe2O3, suggesting that Fe2O3is connected with the –COOon the edge of the GO sheets [39–41], which is in goodagreement with the TEM analysis Graphene oxide-Fe2O3 hybrid material as efficient heterogeneous catalyst for degradation of organic contaminants (PDF Download Available). Available from: https://www.researchgate.net/publication/256678556_Graphene_oxide-Fe2O3_hybrid_material_as_efficient_heterogeneous_catalyst_for_degradation_of_organic_contaminants [accessed May 6, 2016].
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