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Coupling TiO 2 nanorods with g‐CN using modified physical vapor deposition for efficient photoelectrochemical water oxidation
Author(s) -
Wang Lingling,
Wang Ruyi,
Feng Leyu,
Liu Yi
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17335
Subject(s) - photocurrent , materials science , nanorod , heterojunction , absorption (acoustics) , tin oxide , photoelectrochemistry , water splitting , visible spectrum , chemical vapor deposition , optoelectronics , electrode , analytical chemistry (journal) , electrochemistry , doping , photocatalysis , nanotechnology , chemistry , catalysis , biochemistry , chromatography , composite material
The core‐shell TiO 2 @g‐CN nanorods arrays were constructed directly on fluorine‐doped tin oxide grass using vacuum magnetic filtered arc ion plating. The unique structure combines both advantages from TiO 2 as an effective electron‐transfer layer and graphic carbon nitride (g‐CN) with a proper band gap serving as visible light absorption layer. Under 100 mW/cm 2 (AM 1.5G) light illumination, the optimal TiO 2 @g‐CN produces a photocurrent density of 0.91 mA/cm 2 at 1.23 V vs reversible hydrogen electrode, which is 2.1 times of the bare TiO 2 (0.43 mA/cm 2 ) obtained at the same potential. The improved photoelectrochemical performance is mainly attributed from the improved charge separation and transport within the heterojunction as well as the enhanced light absorption.