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Catalysis Letters

, Volume 148, Issue 8, pp 2391–2407 | Cite as

Influence of Tetraalkylammonium Compounds on Photocatalytic and Physical Properties of TiO2

  • Natalya SankovaEmail author
  • Viktoriya Semeykina
  • Dmitry Selishchev
  • Tatyana Glazneva
  • Ekaterina Parkhomchuk
  • Yurii Larichev
  • Nikolai Uvarov
Article
  • 136 Downloads

Abstract

A wide range of experimental data are reported for the first time on the TiO2 prepared by hydrolysis of highly concentrated Ti(OiPr)4 in water solutions of quaternary ammonium compounds (QACs). These TiO2 materials have been shown to be photocatalytically active under visible light irradiation (LED, 450 nm) using acetone as a model substrate oxidized in the gas phase. Five-fold increase in activity in comparison with the commercial photocatalyst KRONOClean 7000 is achieved. Colloidal solutions of hydrolyzed Ti(OiPr)4 have been studied by SAXS method suggesting the way in which QACs solutions may influence the final composition of TiO2. Phase composition, morphology, texture and surface properties of the modified TiO2 have been studied using XRD, BET, SEM and low-temperature FTIR with CO probe. The surface elemental composition has been investigated by XPS method. Additional low-energy levels and high concentration of acid surface sites originated from N/C-doping, are likely to be the main reasons for exceptional photocatalytic performance of these samples.

Graphical Abstract

Keywords

Photocatalysis Catalysis, activity Elementary kinetics Sol–gel Preparation and materials 

Notes

Acknowledgements

This work was conducted within the framework of budget Project No. 0303-2016-0010 for Boreskov Institute of Catalysis.

Compliance with Ethical Standards

Conflict of interest

The authors declare no competing financial interests.

Supplementary material

10562_2018_2455_MOESM1_ESM.docx (3.4 mb)
Supplementary material 1 Photocatalytic activity data; Kubelka-Munk functions and Tauc plot analysis; BET isotherms of N2 adsorption and desorption; TEM images of TPA-TiO2 13 sample; small-angle scattering curves; DTA curves; XPS spectra and atomic ratios of elements in the near-surface layer; spectra, types of OH groups and their strength for KRONOclean 7000. (DOCX 3504 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Natalya Sankova
    • 1
    • 2
    Email author
  • Viktoriya Semeykina
    • 1
    • 2
  • Dmitry Selishchev
    • 1
    • 2
  • Tatyana Glazneva
    • 1
    • 2
  • Ekaterina Parkhomchuk
    • 1
    • 2
  • Yurii Larichev
    • 1
    • 2
  • Nikolai Uvarov
    • 3
  1. 1.Novosibirsk State UniversityNovosibirskRussia
  2. 2.Boreskov Institute of Catalysis SB RASNovosibirskRussia
  3. 3.Institute of Solid State Chemistry and MechanochemistryNovosibirskRussia

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