Abstract:

Foam Ni/TiO₂ nano composite coatings were prepared by composite electrodepositon from Watts bath containing nanosized TiO₂ particles. The surface morphologies of the composite coatings were characterized by scanning electronic microscopy（SEM）. The composition of the coatings was analyzed by energy dispersive spectroscopy（EDS）. The effect of adding surfactant in the plating solution on the composite coatings was also studied. The photocatalytic activity of the foam Ni/TiO₂ nano composite coatings on colibacillus and chlorella was discussed. The results showed that the appearance of coatings was fine and the amount of weight percentage of Ti in the coatings reached 5.97%. The foam Ni/TiO₂ nano composite coatings with added anionic surfactant were finely dispered. The inactivation ratio of the aqueous sample containing colibacillus by the composite coatings reached 60.1% and 99.9% after 30 min and 60 min respectively. When the aqueous sample containing chlorella was treated with the composite coatings，the content of chlorophyll-a decreased from 98.2 mg/m³ to 38.2 mg/m³ within 3 h. The coatings exhibited excellent photocatalytic activity.