%0 Journal Article
%A Zhan, Faqi
%A Yang, Yahui
%A Liu, Wenhua
%A Wang, Keke
%A Li, Wenzhang
%A Li, Jie
%D 2018
%T Facile Synthesis of FeOOH Quantum Dots Modified ZnO
Nanorods Films via a Metal-Solating Process
%U https://acs.figshare.com/articles/journal_contribution/Facile_Synthesis_of_FeOOH_Quantum_Dots_Modified_ZnO_Nanorods_Films_via_a_Metal-Solating_Process/6267197
%R 10.1021/acssuschemeng.8b00776.s001
%2 https://acs.figshare.com/ndownloader/files/11452166
%K WO
%K water oxidation
%K surface charge injection efficiency
%K FeOOH quantum dots
%K XRD
%K oxygen evolution reaction
%K ZnO nanorods film
%K TEM
%K metal oxides QDs
%K SEM
%K FeOOH QDs
%K as-prepared FeOOH QDs
%K FeOOH Quantum Dots Modified ZnO Nanorods Films
%K 1.23 V vs RHE
%X 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/cm2 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 WO3 and ZnO QDs.
%I ACS Publications