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121.
铈掺杂TiO2/Ti光电极制备及可见光下光电催化性能的研究 总被引:1,自引:0,他引:1
采用阳极氧化法制备铈掺杂TiO2/Ti光电极,用SEM、XRD、XRF、XPS和UV/VIS/NIR对光电极的性能进行表征,并对其可见光照射下的光电催化性能进行了测试.研究结果表明:在成膜电压为160V,电流密度为100mA/cm^2,Ce(NO3)3浓度为960mg/L条件下制备的铈掺杂TiO2/Ti光电极在降解罗丹明B的实验中表现出良好的光电催化活性. 相似文献
122.
TiO2 nanotubes: Self-organized electrochemical formation, properties and applications 总被引:2,自引:0,他引:2
J.M. Macak H. Tsuchiya A. Ghicov K. Yasuda R. Hahn S. Bauer P. Schmuki 《Current Opinion in Solid State & Materials Science》2007,11(1-2):3-18
The present paper gives an overview and review on self-organized TiO2 nanotube layers and other transition metal oxide tubular structures grown by controlled anodic oxidation of a metal substrate. We describe mechanistic aspects of the tube growth and discuss the electrochemical conditions that need to be fulfilled in order to synthesize these layers. Key properties of these highly ordered, high aspect ratio tubular layers are discussed. In the past few years, a wide range of functional applications of the layers have been explored ranging from photocatalysis, solar energy conversion, electrochromic effects over using the material as a template or catalyst support to applications in the biomedical field. A comprehensive view on state of the art is provided. 相似文献
123.
高度有序钛基体阳极氧化钛纳米管阵列的制备与表征 总被引:2,自引:1,他引:1
室温下在NH4F、乙二醇的混合溶液中采用阳极氧化法在纯Ti片表面组装一层结构高度有序且表面光滑的TiO2纳米管阵列.对TiO2纳米管阵列进行扫描电子显微镜(SEM)、X射线衍射(XRD)检测; 且检测了TiO2纳米管(锐钛矿型)在锂离子电池和光催化降解甲基橙等应用性能.结果表明, 制备得到了高密度排列的TiO2纳米管阵列; TiO2纳米管在锂离子的脱嵌过程中表现出较好的可逆性质. 溶液中加入H2O2可以提高TiO2纳米管光降解催化活性. 相似文献
124.
铝膜穿透性阳极氧化是实现阳极氧化铝薄膜多层布线基板制作的关键技术。研究了电流密度、电解质溶液温度和铝膜厚度对氧化时间的影响。绝缘电阻测定及扫描电子显微镜分析的结果证实了采用穿透性阳极氧化技术制作导带 ,导带间不存在残余铝薄膜。 相似文献
125.
The superhydrophobicity of plant leaves is a benefit of the hierarchical structures of their surfaces. These structures have been imitated in the creation of synthetic surfaces. In this paper, a novel process for fabrication of biomimetic hierarchical structures by electrochemical deposition of a metal on porous alumina is described. An aluminum specimen was anodically oxidized to obtain a porous alumina template, which was used as an electrode to fabricate a surface with micro structures through electrochemical deposition of a metal such as nickel and copper after the enlargement of pores. Astonishingly, a hierarchical structure with nanometer pillars and micrometer clusters was synthesized in the pores of the template. The nanometer pillars were determined by the nanometer pores. The formation of micrometer clusters was related to the thin walls of the pores and the crystallization of the metal on a flat surface. From the as-prepared biomimetic surfaces, lotus-leaf-like superhydrophobic surfaces with nickel and copper deposition were achieved. 相似文献
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Constrained Order in Nanoporous Alumina with High Aspect Ratio: Smart Combination of Interference Lithography and Hard Anodization 下载免费PDF全文
Josep M. Montero Moreno Martin Waleczek Stephan Martens Robert Zierold Detlef Görlitz Victor Vega Martínez Victor M. Prida Kornelius Nielsch 《Advanced functional materials》2014,24(13):1857-1863
With only two matched processing steps, the fabrication of thick nanoporous alumina membranes with mono‐oriented, perfect hexagonal packing of pores, and precise control of all structural parameters over large areas is demonstrated. The cylindrical pores are uniform in shape and widely tunable in their dimensions and spatial distribution, with aspect ratios as high as 500. In brief, electropolished aluminum is first patterned using three‐beam interference lithography in a single step and then anodized in a hard regime. The periodic concavities in the aluminum surface guide the pore nucleation, and the self‐ordering phenomenon guarantees the maintenance of the predefined arrangement throughout the entire layer. In contrast to other methods, the interpore distance can be easily adjusted, the porous layer is not limited in thickness, no prefabricated stamps are involved, and the periodic pattern can be easily reproduced without risk of degradation. The approach overcomes the time, cost, and scale limitations of other existing processes. These membranes are well‐suited for the templated fabrication of perfectly ordered arrays of highly uniform 1D nanostructures. Thus, the application fields of these functional membranes are diverse: magneto‐optical and opto‐electronic devices, photonic crystals, solar cells, fuel cells, and chemical and biochemical sensing systems, to name a few. 相似文献
130.