Nanoporous gyroid TiO2 and SnO2 by melt infiltration of block copolymer templates

Tao Li, Lars Schulte, Ole Hansen, Sokol Ndoni

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Abstract Fabrication of meso-porous metal oxide thin films with high surface area is a crucial requirement for numerous applications, such as catalysis, photovoltaics and electronics. Despite considerable progress in fabrication of three-dimensional metal oxide nanostructures, it is still quite challenging to manufacture highly ordered structures over a large area in a controlled way. The main objective of this study is to demonstrate fabrication of interconnected, crack-free and highly ordered ceramic films using a nano-porous polymer with gyroid morphology as template. Titanium tetraisopropoxide and tin chloride dihydrate are used as precursors for nanostructured TiO2 and SnO2, respectively. Complete precursor infiltration into the template and successful transformation into metal oxides can be achieved by rational tuning of the template chemistry. As a result, thin films of nanostructured metal oxides with gyroid morphology, such as titania and tin dioxide, are created and thoroughly characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive analysis, x-ray diffraction and Brunauer-Emmett-Teller analysis.
Original languageEnglish
JournalMicroporous and Mesoporous Materials
Volume210
Pages (from-to)161-168
Number of pages8
ISSN1387-1811
DOIs
Publication statusPublished - 2015

Keywords

  • Block copolymer
  • Melt infiltration
  • Nanoporous metal oxide
  • Templating

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