Integrating Zeolite-Type Chalcogenide with Titanium Dioxide Nanowires for Enhanced Photoelectrochemical Activity

Published on 2017-11-14T21:49:36Z (GMT) by
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 TiO<sub>2</sub> nanowires to form a heterostructured photoanode, in which crystalline CPM-121 particles serve as a visible light absorber and TiO<sub>2</sub> 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.

Cite this collection

Mao, Chengyu; Wang, Yanxiang; Jiao, Wei; Chen, Xitong; Lin, Qipu; Deng, Mingli; Ling, Yun; Zhou, Yaming; Bu, Xianhui; Feng, Pingyun (2017): Integrating Zeolite-Type Chalcogenide with Titanium

Dioxide Nanowires for Enhanced Photoelectrochemical Activity. ACS Publications.

https://doi.org/10.1021/acs.langmuir.7b02403

Retrieved: 20:24, Nov 23, 2017 (GMT)