摘要
二次阳极氧化技术在多孔阳极氧化铝和氧化钛纳米管的制备过程中得到广泛应用,但其理论依据还不清楚。本文详细综述了二次阳极氧化和预压印技术的由来及其理论依据,阐明了二次阳极氧化过程中传统"场致助溶"理论无法解释的实验事实,分析了二次阳极氧化和预压印技术在多孔阳极氧化铝制备中的局限性和前提条件,并用氧气气泡模型对文献中报道的一些特殊孔道的形成机制进行了诠释,揭示了气泡模具和氧化物的黏性流动对圆柱形、规则有序孔道的形成的重要影响,展望了电子电流和氧气气泡模具对多孔氧化铝、氧化钛纳米管的制备和结构调控的指导作用。本综述对阳极氧化钛纳米管的制备和机理的深入研究,促进其在光催化和太阳能电池领域的应用有重要的意义。
Two-step anodizing technology （TSAT） has been used widely in the assembling process of porous anodic alumina and porous anodic TiO2 nanotubes. However, the theoretical background and foundation of TSAT are still unclear because of the ambiguous interpretations about the pore generation. A detailed introduction to the origin and theoretical foundation of the TSAT and imprinting technology is presented. The unexplainable experiment phenomena in two-step anodizing process which traditional theories （e. g. the field-assisted dissolution or ejection） can not explain and the limitation and using conditions of the TSAT and imprinting technology are analyzed. The explanation for these conflicting phenomena reported in the published references is given via the oxygen bubbles model. The important effect of the oxygen bubbles mould and the viscous flow of barrier oxide on the formation of columnar and regular channels is emphasized. The electronic current, ionic current and oxygen bubble mould will play an important role in the structural modulation of porous anodic alumina and porous anodic titania nanotubes. The present views may be helpful to understand the mechanism of porous anodic titania and facilitate the assembling of diverse nanostructures for extensive application in photoeatalysis and solar batteries.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2012年第11期2073-2086,共14页
Progress in Chemistry
基金
国家自然科学基金面上项目(No.61171043
51077072)
国家科技重大专项项目(No.2009ZX01021-002)资助
关键词
多孔阳极氧化铝
氧化钛纳米管
二次阳极氧化
气泡模具效应
形成机理
porous anodic alumina
porous anodic TiO2 nanotubes
two-step anodization
oxygen bubbles mould effect
formation mechanism
