摘要
采用阳极氧化法以HF水溶液为电解液制备二氧化钛(TiO2)纳米管阵列,用场致发射扫描电子显微镜和X射线光电子能谱对纳米管阵列的表面形貌、断面结构及元素组成进行表征,并使用场发射测试系统测试其场发射性能,研究了HF水溶液的pH值对TiO2纳米管阵列形貌(管径及管长)的影响。结果表明:调节电解液的pH值可改变TiO2纳米管阵列的形貌,从而提高其场发射性能。当电解液pH值为2.0时TiO2纳米管阵列的场发射开启场强降为2.52 V/μm,且具有较好的电流稳定性。
Well-aligned TiO2 nanotube arrays were prepared in aqueous hydrofluoric acid electrolyte by anodization in this paper. The morphology and composition of TiO2 nanotube arrays were characterized by field emission scanning electron microscopy and X-ray photoelectron spectroscopy, respectively, the field emission performance of TiO2 nanotube arrays was measured by field emission testing system, and the effects of pH value of electrolyte on the morphology （length and diameter） of TiO2 nanotube arrays were investigated. The results showed that the field emission properties of TiO2 nanotube arrays were im- proved due to the change of the morphology by adjusting the pH value of electrolyte. When the pH value of electrolyte was 2.0, the anodized TiO2 nanotube arrays had the lowest turn-on field as 2.52 V/μm and a stable emission current.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2013年第3期252-258,共7页
Chinese Journal of Materials Research
基金
国家八六三计划重大专项项目2013AA030601
国家自然科学基金61106053,61101169
教育部博导基金20103514110007
福建省教育厅资助项目JA11014资助~~
