10.1021/acssuschemeng.8b00776.s001
Faqi Zhan
Faqi
Zhan
Yahui Yang
Yahui
Yang
Wenhua Liu
Wenhua
Liu
Keke Wang
Keke
Wang
Wenzhang Li
Wenzhang
Li
Jie Li
Jie
Li
Facile Synthesis of FeOOH Quantum Dots Modified ZnO
Nanorods Films via a Metal-Solating Process
American Chemical Society
2018
WO
water oxidation
surface charge injection efficiency
FeOOH quantum dots
XRD
oxygen evolution reaction
ZnO nanorods film
TEM
metal oxides QDs
SEM
FeOOH QDs
as-prepared FeOOH QDs
FeOOH Quantum Dots Modified ZnO Nanorods Films
1.23 V vs RHE
2018-05-02 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Facile_Synthesis_of_FeOOH_Quantum_Dots_Modified_ZnO_Nanorods_Films_via_a_Metal-Solating_Process/6267197
In
this study, we referenced the formation principle of rust in
nature and the FeOOH quantum dots (QDs) were prepared using a metal-solating
process. The FeOOH QDs exhibited an average diameter of 3.5 nm with
well crystallinity. Furthermore, the as-prepared FeOOH QDs were deposited
on ZnO nanorods film as a co-catalyst for water oxidation. The crystal
phase, microstructures, and optical properties of the synthesized
films were established through X-ray diffraction (XRD), scanning electron
microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy,
and ultraviolet–visible absorption spectroscopy (UV-vis). Applied
as a photoanode for solar water splitting, the FeOOH QDs/ZnO nanorods
film exhibited a photocurrent density of 0.44 mA/cm<sup>2</sup> at
1.23 V vs RHE, which is 2.1 times higher than that of pure ZnO film.
After the loading of FeOOH QDs, the ZnO photoanode showed higher surface
charge injection efficiency (by a factor of ∼2) and better
long-term stability. The analysis of electrochemical measurements
displayed that, as a co-catalyst of the oxygen evolution reaction,
FeOOH QDs resulted in a noticeable cathodic shift of photocurrent
onset potential for water oxidation and a remarkable improvement of
surface charge injection efficiency. In addition, the metal-solating
method can be applied to preparing the other metal oxides QDs, such
as WO<sub>3</sub> and ZnO QDs.