The method of Ti/TiO 2 -NiO photoelectrode prepared by using sol-gel method continued by calcination process was introduced. The prepared TiO 2 -NiO film was observed with XRD and TEM. The anatase-rutile TiO 2 was mainly on the prepared TiO 2 -NiO composite surface electrode. In addition to NiO, the composite also formed NiTiO 3 that increased with increasing calcination temperature. Photoelectrocatalytic degradation of Rhodamine B (RB) using this electrode was investigated, and anodic potential and pH were optimized. RB degradation was investigated under different conditions, and it showed that photoelectrocatalytic degradation could achieve efficient and complete mineralization of organic pollutant. Through comparison of the photoelectrocatalytic oxidation using the Ti/TiO 2 -NiO electrode operated by single photoanode with the Ti/TiO 2 -NiO electrode operated by several photoanode, it was found that the photoelectrocatalytic efficiency of that by series photoanodes was higher. Additionally, photoelectrocatalytic system was performed at the several different photoelectrodes, which verified the higher photocatalytic activity compared with the single photoelectrode.
KeywordsTi/TiO<sub>2</sub>-NiO PhotoelectrodeVisible LightPhotoelectrocatalysis DegradationRhodamine B
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