Control over the hierarchical structure of titanate nanotube agglomerates


Bavykin, Dmitry V., Kulak, Alexander N. and Walsh, F.C. (2011) Control over the hierarchical structure of titanate nanotube agglomerates Langmuir, 27, (9), pp. 5644-5649. (doi:10.1021/la200527p).

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Description/Abstract

An alkaline hydrothermal treatment of several types of ordered macroporous TiO2 structures, namely microtubes, sea urchin shapes and anodic nanotubes array has been investigated under stationary conditions. The effect of the size and geometry of these structures on the morphology of forming hierarchical agglomerates of titanate nanotubes have been systematically studied. It has been revealed that at sizes larger than the critical value (ca. 1 ?m), the whole geometry of the initial ordered TiO2 structure is maintained under reaction conditions leading to formation of hierarchical structures, in which bulk TiO2 is replaced with titanate nanotube agglomerates. This principle provides a convenient route for the preparation of multi-scale micro- and nanostructures of TiO2 based materials. The analysis of critical size suggests that under reaction conditions, due to the limited transport of dissolved Ti(IV) species, the growth of nanotubes occurs locally.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1021/la200527p
ISSNs: 0743-7463 (print)
Keywords: solvothermal synthesis, reflux, surface area, stability, mechanism
Subjects:

Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 183745
Date :
Date Event
March 2011Published
Date Deposited: 04 May 2011 10:21
Last Modified: 18 Apr 2017 02:22
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/183745

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