Publication detail

Magnetically guidable single TiO2 nanotube photocatalyst: Structure and photocatalytic properties

SEPÚLVEDA SEPÚLVEDA, L. SALDAN, I. ALIJANI, M. ČIČMANCOVÁ, V. MICHALIČKA, J. HROMÁDKO, L. BULÁNEK, R. SOPHA, H. MACÁK, J.

Original Title

Magnetically guidable single TiO2 nanotube photocatalyst: Structure and photocatalytic properties

Type

journal article in Web of Science

Language

English

Original Abstract

The influence of annealing temperature, the crystallinity, textural properties of magnetically guidable anodic TiO2 nanotubes in form of single tube powders on the photocatalytic decomposition of model organic dye is investigated for the first time. The powders were prepared from self-organized anodic TiO2 nanotube layers (grown on Ti) by etching in piranha solution, detaching them from the Ti substrate, and annealing in a wide range of temperatures (400-900 degrees C). The nanotubular shape was preserved up to 800 degrees C. Powders annealed up to 800 degrees C did not contain any detectable rutile phase, which is unique among other TiO2 nanomaterials at this temperature. Part of the obtained TiO2 ST-NT powders was decorated with Fe3O4 nanoparticles using an oleic acid-based synthesis. The TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders were characterized in terms of morphology, crystallinity, and specific surface area. Finally, all materials were exploited for the photocatalytic decomposition of a model dye. The best photocatalytic performance of TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders were obtained at annealing temperatures of 600 and 700 degrees C, respectively. The synergy resulting from annealing, crystallite size, and specific surface area enhances the photocatalytic activity of TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders under UV light. This approach goes beyond the classical Kasuga alkaline hydrothermal approach, enabling the preparation of large quantity of TiO2 nanotubes without any impurities (such as e.g. Na or Ca content resulting from the Kasuga approach).

Keywords

TiO 2 nanotube powders; TiO 2 single nanotubes; Fe3O4 nanoparticles; Photocatalysis

Authors

SEPÚLVEDA SEPÚLVEDA, L.; SALDAN, I.; ALIJANI, M.; ČIČMANCOVÁ, V.; MICHALIČKA, J.; HROMÁDKO, L.; BULÁNEK, R.; SOPHA, H.; MACÁK, J.

Released

15. 2. 2023

ISBN

1873-3956

Periodical

CERAMICS INTERNATIONAL

Year of study

49

Number

4

State

United Kingdom of Great Britain and Northern Ireland

Pages from

6764

Pages to

6771

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S0272884222037786?via%3Dihub

BibTex

@article{BUT182602,
  author="Lina Marcela {Sepúlveda Sepúlveda} and Ivan {Saldan} and Mahnaz {Alijani} and Veronika {Čičmancová} and Jan {Michalička} and Luděk {Hromádko} and Roman {Bulánek} and Hanna Ingrid {Sopha} and Jan {Macák}",
  title="Magnetically guidable single TiO2 nanotube photocatalyst: Structure and photocatalytic properties",
  journal="CERAMICS INTERNATIONAL",
  year="2023",
  volume="49",
  number="4",
  pages="6764--6771",
  doi="10.1016/j.ceramint.2022.10.197",
  issn="1873-3956",
  url="https://www.sciencedirect.com/science/article/pii/S0272884222037786?via%3Dihub"
}