| NH4F/H3PO4体系中阳极氧化法制备TiO2纳米管阵列(英文) |
| Fabrication of TiO2 Nanotube Arrays via Electrochemical Anodization in NH4F/H3PO4 Electrolyte Solution System |
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| 摘要: 以价廉的Ni板代替常用的Pt片为阴极，纯钛为阳极，采用电化学阳极氧化法在NH4F-H3PO4体系中制备出TiO2纳米管阵列。详细研究了制备参数(溶液酸度、氟离子浓度、外加电压和氧化时间)对所获纳米管阵列形貌的影响。采用场发射扫描电镜(FE-SEM)和X射线衍射(XRD)对样品的形貌和晶相结构进行了表征。在最优化的条件下，可以获得形貌规整、表面干净、有序的TiO2纳米管阵列。纳米管阵列的平均管径为60 nm，管长约530 nm。采用阳极氧化法制备的纳米管阵列是非晶态的，经400 ℃热处理2 h后，可以转变为锐钛矿相。实验结果还发现，经过热处理后，纳米管阵列变得更为有序，管径扩大至约95 nm。 |
| 关键词: TiO2 纳米管阵列 Ni阴极 电化学阳极氧化 |
| 基金项目: |
| Abstract: TiO2 nanotube arrays were fabricated by anodization of titanium in aqueous electrolyte solution of NH4F+H3PO4 using a Nickel sheet of low cost as cathode instead of conventionally used noble Platinum. The effects of preparation parameters, i.e., concentration of H3PO4 and F-, applied voltage and anodization time, on the morphology of as-prepared nanotube arrays were systematically studied. Field emission scanning electron microscope(FE-SEM) and X-ray diffraction(XRD) analysis were carried out to characterize the morphology and structure of the samples. The results showed that the self-ordered TiO2 nanotube arrays with an average pore size of 60 nm and a length of 530 nm could be obtained under optimum conditions. The as-prepared nanotube arrays were amorphous and transformed to an anatase crystal structure after being annealed at 400 ℃ for 2 h. It was also found that the freshly-prepared nanotube arrays got more ordered after calcination, with a pore size of ca. 95 nm. |
| Keywords: titania nanotube arrays nickel cathode electrochemical anodization |
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| 李 纲,刘中清,王 磊,卢 静,张 昭.NH4F/H3PO4体系中阳极氧化法制备TiO2纳米管阵列(英文)[J].无机化学学报,2009,25(6):1031-1037. |
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