TiO^sub 2^ nanorods grown by hydrothermal method and their photocatalytic activity for hydrogen production

TiO2 nanorods were prepared by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods, the rutile phase i...

Full description

Saved in:
Bibliographic Details
Published inMaterials letters Vol. 237; p. 310
Main Authors Cruz, MR Alfaro, Sanchez-Martinez, D, Torres-Martínez, LM
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier BV 15.02.2019
Subjects
Anatase
Catalytic activity
Conduction bands
Copper
Film thickness
Hydrogen production
Materials science
Nanorods
Photocatalysis
Profilometers
Rutile
Structural analysis
Thickness measurement
Thin films
Titanium dioxide
Valence band
Online AccessGet full text

Cover

More Information
Summary:TiO2 nanorods were prepared by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods, the rutile phase is present. The thin film thickness were measured using a profilometer, resulting in a thickness of 310 nm for the seed layer and ∼400 nm for TiO2 nanorods. PL analysis for both films presented an indirect transitions Γ1b → Χ2a, as well as oxygen vacancies, defects and surface states. Photocatalytic H2 production for TiO2 seed layer film was around 38 μmol, while TiO2 nanorods produced 132 μmol. This is attributed to the increase to the midgap states present below the conduction band and near to the valence band, which help to improve the photocatalytic activity.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.11.040