info:eu-repo/semantics/conferenceProceedings
1.33 Enhanced Photocatalytic Activity for H2 Production by RGO/P25 Composite through UV Assisted Anchoring
Autor
BLANCA CRISTINA HERNANDEZ MAJALCA
MIGUEL JESUS MELENDEZ ZARAGOZA
Jesús Manuel Salinas Gutiérrez
Alejandro López Ortíz
VIRGINIA HIDALINA COLLINS MARTINEZ
Resumen
In this work, graphene oxide (GO) was prepared by the Tour method from graphite powder employing a microwave pre-treatment, which was used to modify TiO2 (P25). A composite of reduced graphene oxide (RGO) and P25 was prepared (RGO/P25) by UV assisted anchoring of P25 on RGO. The structure, morphology, textural and optical properties were studied by XRD, SEM, BET and UV-Vis techniques, respectively. Water splitting photocatalytic evaluation used an aqueous methanol solution of the suspended composite material and a 250 W mercury lamp as light irradiation source. Results indicate a bandgap value of 2.57 eV for the RGO/P25 composite, while this material exhibited a H2 production rate greater than either P25 or graphene oxide alone. A significant enhancement in the hydrogen production rate was achieved by RGO/P25 as photocatalyst obtaining ~400 μmol H2/gh. This can be presumably attributed to graphene oxide acting as an electron collector and transporter in the RGO/P25 composite.
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