Journal
NANOTECHNOLOGY
Volume 18, Issue 29, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/18/29/295604
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We present herein a simple method named the double-template-assisted sol-gel method for preparing TiO2 nanotube arrays with nanopores on their walls. Poly(ethylene glycol) dissolved in TiO2 sol was used as a soft template to form nanopores on the walls of TiO2 nanotube arrays, which were templated from ZnO nanorod hard templates by a dip-coating technique. The microstructure of nanoporous TiO2 nanotube arrays can change from end- opened to end- closed by increasing the dip-coating cycle number. In addition, the essential parameters of nanoporous TiO2 nanotube arrays are determined by the growth conditions of ZnO nanorod templates. This paper gives a simple and universal way to produce nanopores on the walls of TiO2 nanotube arrays to increase the specific surface area.
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