Integrating Zeolite-Type Chalcogenide with Titanium
Dioxide Nanowires for Enhanced Photoelectrochemical Activity
Posted on 2017-11-14 - 21:49
Developing
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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Mao, Chengyu; Wang, Yanxiang; Jiao, Wei; Chen, Xitong; Lin, Qipu; Deng, Mingli; et al. (2017). Integrating Zeolite-Type Chalcogenide with Titanium
Dioxide Nanowires for Enhanced Photoelectrochemical Activity. ACS Publications. Collection. https://doi.org/10.1021/acs.langmuir.7b02403
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AUTHORS (10)
CM
Chengyu Mao
YW
Yanxiang Wang
WJ
Wei Jiao
XC
Xitong Chen
QL
Qipu Lin
MD
Mingli Deng
YL
Yun Ling
YZ
Yaming Zhou
XB
Xianhui Bu
PF
Pingyun Feng
KEYWORDS
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