Abstract
TiO2/graphene composites were synthesized through one-step hydrothermal method. The composites show an enhancement in photo-generated cathodic protection as the time-dependent profiles of photocurrent responses has confirmed. XRD data show that a bicrystalline framework of anatase and brookite formed as graphene provided donor groups in the hydrothermal process. The transfer of photoinduced electrons in the biphasic TiO2 results in effective electron-hole separation. Moreover, graphene lead to a negative shift of the Fermi level as evidenced by Mott–Schottky analysis, which decreases the Schottky barrier formed in the TiO2 and 304 stainless steel interface and results in the enhancement of photo-generated cathodic protection.
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