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Integrating Zeolite-Type Chalcogenide with Titanium Dioxide Nanowires for Enhanced Photoelectrochemical Activity
journal contribution
posted on 2017-11-14, 21:49 authored by Chengyu Mao, Yanxiang Wang, Wei Jiao, Xitong Chen, Qipu Lin, Mingli Deng, Yun Ling, Yaming Zhou, Xianhui Bu, Pingyun FengDeveloping
photoanodes with efficient visible-light harvesting
and excellent charge separation still remains a key challenge in photoelectrochemical
water splitting. Here zeolite-type chalcogenide CPM-121 is integrated
with TiO2 nanowires to form a heterostructured photoanode,
in which crystalline CPM-121 particles serve as a visible light absorber
and TiO2 nanowires serve as an electron conductor. Owing
to the small band gap of chalcogenides, the hybrid electrode demonstrates
obvious absorption in visible-light range. Electrochemical impedance
spectroscopy (EIS) shows that electron transport in the hybrid electrode
has been significantly facilitated due to the heterojunction formation.
A >3-fold increase in photocurrent is observed on the hybrid electrode
under visible-light illumination when it is used as a photoanode in
a neutral electrolyte without sacrificial agents. This study opens
up a new avenue to explore the potential applications of crystalline
porous chalcogenide materials for solar-energy conversion in photoelectrochemistry.
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EISIntegrating Zeolite-Type ChalcogenideTitanium Dioxide Nanowiresheterojunction formationlight absorberelectron conductorelectrodevisible-light illuminationCPM -121 particlesTiO 2 nanowiresheterostructured photoanodeElectrochemical impedance spectroscopyvisible-light rangechalcogenide materialszeolite-type chalcogenide CPM -121solar-energy conversioncharge separationvisible-light harvestingphotoelectrochemical water splittingelectron transportEnhanced Photoelectrochemical Activityband gap
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