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ZnFe 2 O 4 Leaves Grown on TiO 2 Trees Enhance Photoelectrochemical Water Splitting
Author(s) -
Zheng XueLi,
Dinh CaoThang,
Arquer F. Pelayo García,
Zhang Bo,
Liu Min,
Voznyy Oleksandr,
Li YiYing,
Knight Gordon,
Hoogland Sjoerd,
Lu ZhengHong,
Du XiWen,
Sargent Edward H.
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202004354
Subject(s) - water splitting , spectral line , sample (material) , analytical chemistry (journal) , materials science , mineralogy , optics , chemistry , physics , thermodynamics , biochemistry , photocatalysis , catalysis , chromatography , astronomy
Photoelectrochemical (PEC) processes offer a direct use of sunlight for a large variety of applications, including hydrogen production for energy storage, as well as hydroxyl radical formation for pollutant degradation. [ 1,2 ] Among the various photocatalysts developed to date, TiO 2 is particularly suited to commercial scale-up because it is abundant, nontoxic, and stable under photochemical conditions. [ 3–6 ] Unfortunately, its large bandgap limits its photoactivity to the ultraviolet (UV) region. As a result, in the best case it can absorb only up to 5% of incident solar photons. This limits its potential to increase further in photoelectrochemical effi ciency. Strategies to expand the TiO 2 optical absorption spectrum into the visible region include the sensitization of TiO 2 with dyes or small-bandgap semiconductors, [ 7–9 ] doping, [ 10–13 ]