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Rudakova AV, Oparicheva UG, Grishina AE, et al. Photoinduced hydrophilic conversion of hydrated ZnO surfaces. J Colloid Interface Sci. 2015;466:452-60doi: 10.1016/j.jcis.2015.08.015.
Rudakova, A. V., Oparicheva, U. G., Grishina, A. E., Murashkina, A. A., Emeline, A. V., & Bahnemann, D. W. (2016). Photoinduced hydrophilic conversion of hydrated ZnO surfaces. Journal of colloid and interface science, 466452-60. https://doi.org/10.1016/j.jcis.2015.08.015
Rudakova, Aida V, et al. "Photoinduced hydrophilic conversion of hydrated ZnO surfaces." Journal of colloid and interface science vol. 466 (2016): 452-60. doi: https://doi.org/10.1016/j.jcis.2015.08.015
Rudakova AV, Oparicheva UG, Grishina AE, Murashkina AA, Emeline AV, Bahnemann DW. Photoinduced hydrophilic conversion of hydrated ZnO surfaces. J Colloid Interface Sci. 2016 Mar 15;466:452-60. doi: 10.1016/j.jcis.2015.08.015. Epub 2015 Aug 06. PMID: 26774972.
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J Colloid Interface Sci. 2016 Mar 15;466:452-60. doi: 10.1016/j.jcis.2015.08.015. Epub 2015 Aug 06.

Photoinduced hydrophilic conversion of hydrated ZnO surfaces.

Journal of colloid and interface science

Aida V Rudakova, Ulyana G Oparicheva, Anastasiya E Grishina, Anna A Murashkina, Alexei V Emeline, Detlef W Bahnemann

Affiliations

  1. Laboratory "Photoactive Nanocomposite Materials", Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia. Electronic address: [email protected].
  2. Laboratory "Photoactive Nanocomposite Materials", Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia.
  3. Laboratory "Photoactive Nanocomposite Materials", Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia. Electronic address: [email protected].

PMID: 26774972 DOI: 10.1016/j.jcis.2015.08.015

Abstract

Here we focused on the study of the effect of the zinc oxide nano-coatings surface acidity on the surface hydrophilicity and photoinduced hydrophilic conversion. A three-step procedure was used to have the initial state of the ZnO surface free of organics and to control the conditions during the water wetting and the irradiation steps. The kinetics of photoinduced hydrophilic conversions for ZnO films were obtained and demonstrated a dependence on the initial hydrophilic state. No conversion into the superhydrophilic state was observed for ZnO nano-films independently of the surface acidity. Irradiation in the ultraviolet and visible spectral regions showed the existence of "slow" and "fast" processes in the photoinduced hydrophilic conversion of the ZnO surface. A multi-layered model of hydroxyl-hydrated coverage of the surface is proposed to explain the experimental results.

Copyright © 2015 Elsevier Inc. All rights reserved.

Keywords: Dip-coating; Hydroxyl-hydrated coverage; Nano-coating; Photoinduced hydrophilic conversion; Sol–gel synthesis; Surface acidity; Surface total energy; Zinc oxide

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