Enhanced visible-light photocatalytic properties of g-C3N4 by coupling with ZnAl2O4 |
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| Affiliation: | 1. Depto. de Química, Área de Catálisis, Universidad Autónoma Metropolitana — Iztapalapa, Av. San Rafael Atlixco No. 189, México, D.F. 09340, México;2. Instituto Politécnico Nacional CICATA—Legaria, Legaria No. 694, México, D.F. 11500, Mexico;3. Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N La Marquesa, Ocoyoacac, Edo. México C.P. 52750, Mexico;4. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior SN, Ciudad Universitaria, Coyoacán, C.P. 04510 México, D.F., Mexico |
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| Abstract: | 
A series of g-C3N4/ZnAl2O4 composites were prepared using a conventional calcination method and the heterostructures were systematically characterized. It was found that the combination of g-C3N4 with ZnAl2O4 significantly improve their photocatalytic activities. The optimum photocatalyst of composite is at 5% (wt%) of ZnAl2O4, whose degradation efficiency for methyl orange (MO) was 96% within 120 min under visible-light irradiation. The formation of heterojunction between g-C3N4 and ZnAl2O4 can facilitate efficient charge separation of photogenerated electron-hole pairs, which were confirmed by electrochemical impedance spectroscopy (EIS). As a result, the photocatalytic properties of composites were enhanced. |
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