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用浸渍-分解法将Bi2O3纳米颗粒沉积在TiO2纳米管壁上,制备了Bi2O3/TiO2纳米管阵列.用电感耦合等离子体发射光谱(ICP-AES)测定了Bi2O3/TiO2纳米管阵列的化学组分,利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和紫外-可见(UV-Vis)吸收光谱表征了所制备的样品.通过在可见光下(λ>400nm)降解甲基橙(MO)水溶液来评价样品的光催化活性.结果表明,Bi2O3纳米颗粒均匀地沉积在TiO2纳米管中.Bi2O3/TiO2纳米管阵列具有比纯Bi2O3膜和N-TiO2纳米管阵列高得多的可见光催化活性.Bi2O3/TiO2纳米管阵列活性的增强是其强可见光吸收和Bi2O3与TiO2之间形成的异质结的协同作用的结果.
Bi2O3 nanoparticles were deposited on the wall of TiO2 nanotubes by impregnation-decomposition method to prepare Bi2O3 / TiO2 nanotube arrays.The chemical groups of Bi2O3 / TiO2 nanotube arrays were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-Vis absorption spectroscopy.At the same time, (MO) aqueous solution to evaluate the photocatalytic activity of the sample.The results show that the Bi2O3 nanoparticles are uniformly deposited in the TiO2 nanotubes.Bi2O3 / TiO2 nanotube array has much higher than pure Bi2O3 film and N-TiO2 nanotube array Of visible light photocatalytic activity.Bi2O3 / TiO2 nanotube array activity enhancement is its strong visible light absorption and Bi2O3 and TiO2 heterojunction formed between the synergy results.