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通过将多孔羟基磷灰石(HAP)浸渍于掺杂Fe3+二氧化钛溶胶中再经干燥、烧结,制备出负载光催化剂。采用TEM、FT-IR和XRD对负载情况和物相进行了表征,此外重点讨论了不同的Fe3+掺杂量、煅烧温度和光照条件因素对光催化性能的影响。研究发现Fe3+的掺杂量对光催化性能有较大影响,当掺杂量为0.5%时对甲基橙有最大降解率为43.6%;煅烧温度对于光催化性能的影响更大,在600℃时由于锐钛矿和金红石共存而产生的混晶效应有利于催化性能的提高;此外研究还发现在卤钨灯下可获得最大降解率。
The porous photocatalyst was prepared by immersing porous hydroxyapatite (HAP) in a doped Fe3 + titania sol, followed by drying and sintering. The conditions of loading and phase were characterized by TEM, FT-IR and XRD. In addition, the effects of different Fe3 + doping amount, calcination temperature and illumination conditions on the photocatalytic activity were discussed. The results show that the doping amount of Fe3 + has a great influence on the photocatalytic performance. The maximum degradation rate of methyl orange is 43.6% when the doping amount is 0.5%. The calcination temperature has greater influence on the photocatalytic performance. Under 600 ℃ When the anatase and rutile coexistence of the resulting mixed crystal effect is conducive to the improvement of catalytic performance; In addition, the study also found that under the tungsten halogen lamp to obtain the maximum degradation rate.