Mao Aiming, Meng Xianhui, Kim Min Seok, Yu Ji-Beom, Han Gui Young, Park Jong Hyeok
School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, Korea.
J Nanosci Nanotechnol. 2011 Aug;11(8):7290-3. doi: 10.1166/jnn.2011.4784.
TiO2 nanotube arrays decorated with alpha-Fe2O3 were prepared by forming a nanotube-like TiO2 film on a Ti sheet using an anodization process, followed by electrochemical deposition to decorate hematite (alpha-Fe2O3) nanoparticles on the TiO2 nanotube arrays. The SEM and XRD results revealed that the alpha-Fe2O3 nanoparticles were homogeneously embedded on the surface of the TiO2 nanotube arrays. The photoelectrochemical properties of the alpha-Fe2O3/TiO2 nanotube arrays as photoanode were studied by photocurrent-potential behavior in 1 M NaOH electrolyte under 100 mW/cm2 UV-Visible light irradiation. Also, the length dependence of TiO2 nanotubes and the amount dependence of alpha-Fe2O3 nanoparticles on the photocatalytic ability were studied and thus the optimum conditions were determined.
通过阳极氧化工艺在钛片上形成纳米管状二氧化钛薄膜，随后进行电化学沉积以在二氧化钛纳米管阵列上装饰赤铁矿（α-Fe₂O₃）纳米颗粒，制备出装饰有α-Fe₂O₃的二氧化钛纳米管阵列。扫描电子显微镜（SEM）和X射线衍射（XRD）结果表明，α-Fe₂O₃纳米颗粒均匀地嵌入在二氧化钛纳米管阵列的表面。在100 mW/cm²紫外-可见光照射下，通过在1 M氢氧化钠电解液中的光电流-电位行为研究了α-Fe₂O₃/二氧化钛纳米管阵列作为光阳极的光电化学性质。此外，还研究了二氧化钛纳米管长度以及α-Fe₂O₃纳米颗粒数量对光催化能力的影响，从而确定了最佳条件。
