NaTaO3 photocatalysts of different crystalline structures for water splitting into H2 and O2

Wan Hsien Lin, Ching Cheng, Che Chia Hu, Hsisheng Teng

Research output: Contribution to journalArticle

112 Citations (Scopus)

Abstract

Perovskite-type NaTa O3 derived from a sol-gel synthesis exhibited a larger surface area and a remarkably higher photocatalytic activity in water splitting than the solid-state synthesized NaTa O3. The sol-gel and solid-state NaTa O3 had different crystalline structures of monoclinic P2m and orthorhombic Pcmn, respectively. Diffuse reflectance spectra showed that the sol-gel specimen had a slightly larger band gap. The band structure analysis revealed an indirect band gap for the sol-gel NaTa O3, contrary to the direct band gap of the solid-state one. The difference in the electronic structure and surface area explained the higher photocatalytic activity of the sol-gel NaTa O3.

Original languageEnglish
Article number211904
JournalApplied Physics Letters
Volume89
Issue number21
DOIs
Publication statusPublished - 2006 Dec 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'NaTaO<sub>3</sub> photocatalysts of different crystalline structures for water splitting into H<sub>2</sub> and O<sub>2</sub>'. Together they form a unique fingerprint.

  • Cite this