ESTONIAN ACADEMY
PUBLISHERS
eesti teaduste
akadeemia kirjastus
PUBLISHED
SINCE 1952
 
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proceedings
of the estonian academy of sciences
ISSN 1736-7530 (Electronic)
ISSN 1736-6046 (Print)
Impact Factor (2020): 1.045

Synthesis, photocatalytic properties and morphology of various TiO2 nanostructures modified with gold; pp. 479–485

Full article in PDF format | https://doi.org/10.3176/proc.2017.4.18

Authors
Reinis Drunka, Janis Grabis, Dzidra Jankovica, Dzintra-Arija Rasmane, Aija Krumina

Abstract

TiO2 is promising material for preparing photocatalysts for water splitting and hydrogen production using solar energy. Due to its large band gap 3.2 eV, anatase cannot absorb sun light effectively in visible light (VIS) spectral part. Percious metal nanopraticles are promising dopants for TiO2 activation as those can decrease band grap of anatase and increase photocatalytic activity significantly. Also the morphology of TiO2 plays an important role in photocatalytic activity. In this research self-organized TiO2 nanotube and nanopore layers were prepared by electrochemical anodization and plasma electrolytic oxidation (PEO) of titanium foil. TiO2 nanofibre layers were prepared by using microwave-assisted synthesis. Chemical deposition method was used to modify obtained substrates with gold nanoparticles. All modified samples showed higher photocatalytic activity than pure TiO2 nanostructures.


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