1 research outputs found
Facile Synthesis of [101]-Oriented Rutile TiO<sub>2</sub> Nanorod Array on FTO Substrate with a Tunable Anatase–Rutile Heterojunction for Efficient Solar Water Splitting
Generating
a sustainable energy source through photoelectrochemical
(PEC) water splitting requires a suitable photocatalyst. A [101]-oriented
rutile TiO<sub>2</sub> nanorod (NR) array in heterojunction with anatase
on a fluorine-doped tin oxide (FTO) substrate is successfully prepared
using a facile single-step hydrothermal process. The presence of anatase
phase over the predominant rutile NRs’ surface is confirmed
by transmission electron microscopy and tip-enhanced Raman spectroscopy.
Solar water-splitting performances of anatase–rutile heterojunction
with low energy (101) and high energy (001) rutile facets are compared.
The low energy (101) facet rutile–anatase heterojunction shows
higher photoconversion efficiency of 1.39% at 0.49 V<sub>RHE</sub> than the high energy (001) facet rutile–anatase heterojunction
(0.37% at 0.73 V<sub>RHE</sub>). The mechanism for enhanced photocatalytic
activity of the low energy (101) facet rutile–anatase heterojunction
has been proposed. The role of NaCl in tuning the anatase portion,
morphology, and PEC water-splitting performance has also been studied