Sonochemical synthesis of ZnO-ZnS core-shell nanorods for enhanced photoelectrochemical water oxidation

Se Young Cheon, Jae Sik Yoon, Kyung Hee Oh, Kyu Yeon Jang, Jong Hyeok Seo, Joon Yong Park, Sang Il Choi, Won Seok Seo, Gaehang Lee, Ki Min Nam

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The ultrasonic-assisted synthesis method provides a fast, simple, and large-scale route for synthesizing desired materials under ambient conditions. In this work, we report on the facile preparation of ZnO-ZnS core-shell nanorods on a fluorine-doped tin oxide (FTO) substrate. The core-shell nanorods were synthesized by sequential nanoscale reactions involving the preparation of ZnO nanorods and conversion of the ZnO surface into a ZnS shell on the FTO substrate, using an in situ sonochemical method. The ZnO-ZnS core-shell nanorods showed improved photocurrents compared with ZnO nanorods for the water oxidation reaction. During the water oxidation reaction, the ZnS shell passivates the surface-defects of the ZnO, which results in enhanced charge separation in the ZnO nanorods and higher performance.

Original languageEnglish
Pages (from-to)3825-3834
Number of pages10
JournalJournal of the American Ceramic Society
Volume100
Issue number9
DOIs
StatePublished - Sep 2017

Keywords

  • core-shell structures
  • photocatalysis
  • ultrasonics
  • zinc oxide

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