Study on Photocatalytic Degradation of Electroless Ni-P-TiO_2 Composite Coating

摘要

TiO_2 shows a high efficiency in Photocatalysis, however, the recycling of TiO_2 is difficult, composite coating is prepared by simultaneous elecroless deposition of NiP and TiO_2 on substrates, surface topography and hardness of composite coating are investigated by metalloscope, SEM, EDS and Vickers microhardness; The relation between absorbence of methyl orange and time is researched by 723# spectrophotometer. The results show when TiO_2 content in bath is 4g/L, plating speed is most fast and amount to 12.2μm/h, the photocatalytic effect is best, by comparing the microhardness of heat-treated compound coating and the Ni-P alloy coating, the maximum microhardness of the former appears in 500°C and achieves HV1180, and the latter appears in 400 °C and achieves HV950.