Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Multilayer films from templated TiO2 and structural changes during their thermal treatment

Procházka, Jan ; Kavan, Ladislav ; Shklover, Valery ; Zukalová, Markéta ; Frank, Otakar ; Kalbáč, Martin ; Zukal, Arnošt ; Pelouchová, Hana ; Janda, Pavel and Mocek, Karel , et al. (2008) In Chemistry of Materials 20(9). p.2985-2993
Abstract

This work is focused on synthesis, characterization, and determination of main parameters of the multilayer P123 templated TiO2 films. The mesoporous multilayer thin films consist of TiO2 nanoparticles on the F-doped SnO2 (FTO) conductive glass substrates. The films were grown by implementing the protocol of supramolecular templating with the amphiphilic triblock copolymer, Pluronic P123. The templated multilayer films were manufactured by repeated dip coating followed by the thermal treatment at 350°C for 2 h after deposition of each layer. It was found that the multilayer preparation technique at 350 °C has serious limitations. The structure does not further increase its specific surface area... (More)

This work is focused on synthesis, characterization, and determination of main parameters of the multilayer P123 templated TiO2 films. The mesoporous multilayer thin films consist of TiO2 nanoparticles on the F-doped SnO2 (FTO) conductive glass substrates. The films were grown by implementing the protocol of supramolecular templating with the amphiphilic triblock copolymer, Pluronic P123. The templated multilayer films were manufactured by repeated dip coating followed by the thermal treatment at 350°C for 2 h after deposition of each layer. It was found that the multilayer preparation technique at 350 °C has serious limitations. The structure does not further increase its specific surface area (roughness factor) after deposition of more than 3-5 layers. The new surface area added by deposition of the top layer is compensated by the reduction of the surface area lost due to the sintering of the bottom layers. The careful review of the analytical data suggests that the morphology of the P123 templated TiO 2 structure is likely the tightest arrangement of randomly positioned particles of a certain size on a given pore diameter. The bulk material consists of pores evenly formed in all directions while a denser crust is formed on the surface where the fusion was restricted in one direction at the interface with the air. Subsequent thermal treatments of the multilayer films were applied to improve the anatase crystallinity while keeping the open morphology and small particle size. The morphological changes of the mesoporous structure during the subsequent thermal treatment at 425-540 °C were investigated.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; and (Less)
publishing date
type
Contribution to journal
publication status
published
in
Chemistry of Materials
volume
20
issue
9
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:44349122411
ISSN
0897-4756
DOI
10.1021/cm071452e
language
English
LU publication?
no
id
51c8d98f-b553-4784-ac3a-95f66cb398ca
date added to LUP
2021-12-15 11:55:46
date last changed
2022-04-11 22:11:00
@article{51c8d98f-b553-4784-ac3a-95f66cb398ca,
  abstract     = {{<p>This work is focused on synthesis, characterization, and determination of main parameters of the multilayer P123 templated TiO<sub>2</sub> films. The mesoporous multilayer thin films consist of TiO<sub>2</sub> nanoparticles on the F-doped SnO<sub>2</sub> (FTO) conductive glass substrates. The films were grown by implementing the protocol of supramolecular templating with the amphiphilic triblock copolymer, Pluronic P123. The templated multilayer films were manufactured by repeated dip coating followed by the thermal treatment at 350°C for 2 h after deposition of each layer. It was found that the multilayer preparation technique at 350 °C has serious limitations. The structure does not further increase its specific surface area (roughness factor) after deposition of more than 3-5 layers. The new surface area added by deposition of the top layer is compensated by the reduction of the surface area lost due to the sintering of the bottom layers. The careful review of the analytical data suggests that the morphology of the P123 templated TiO <sub>2</sub> structure is likely the tightest arrangement of randomly positioned particles of a certain size on a given pore diameter. The bulk material consists of pores evenly formed in all directions while a denser crust is formed on the surface where the fusion was restricted in one direction at the interface with the air. Subsequent thermal treatments of the multilayer films were applied to improve the anatase crystallinity while keeping the open morphology and small particle size. The morphological changes of the mesoporous structure during the subsequent thermal treatment at 425-540 °C were investigated.</p>}},
  author       = {{Procházka, Jan and Kavan, Ladislav and Shklover, Valery and Zukalová, Markéta and Frank, Otakar and Kalbáč, Martin and Zukal, Arnošt and Pelouchová, Hana and Janda, Pavel and Mocek, Karel and Klementová, Mariana and Carbone, Dina}},
  issn         = {{0897-4756}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{9}},
  pages        = {{2985--2993}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Chemistry of Materials}},
  title        = {{Multilayer films from templated TiO<sub>2</sub> and structural changes during their thermal treatment}},
  url          = {{http://dx.doi.org/10.1021/cm071452e}},
  doi          = {{10.1021/cm071452e}},
  volume       = {{20}},
  year         = {{2008}},
}