Femtosecond Laser Induced Phase Transformation of TiO2with Exposed Reactive Facets for Improved Photoelectrochemistry Performance

Ming Qiao, Jianfeng Yan, Liangti Qu, Bingquan Zhao, Jiangang Yin, Tianhong Cui, Lan Jiang

Research output: Contribution to journalArticlepeer-review

Abstract

Titanium dioxide (TiO2) is one of the most promising candidates for photoelectrochemistry applications. For a high photoelectrochemistry performance, the control of crystal structure and crystal facet is essential. The phase transformation of TiO2 is conventionally achieved by thermal annealing. Here, we report an approach for selective phase transformation of TiO2 containing exposed reactive facets with improved photoelectrochemistry performance. After femtosecond laser processing, TiO2 nanotubes with exposed reactive anatase {010} facets are prepared, and they have a maximum photocurrent density more than 5 times that of pure anatase. Additionally, this strategy can induce phase transformation in a selective area, which shows the advantages of patterning processing. Our method constructs a promising strategy for preparing functional nanomaterials with high performances and functionality.

Original languageEnglish (US)
Pages (from-to)41250-41258
Number of pages9
JournalACS Applied Materials and Interfaces
Volume12
Issue number37
DOIs
StatePublished - Sep 16 2020

Bibliographical note

Funding Information:
This study was supported by the National Key R&D Program of China (2018YFB1107200 and 2017YFB1104300) and the National Natural Science Foundation of China (51775303).

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • femtosecond laser
  • phase transformation
  • photoelectrochemistry
  • reactive facets
  • titanium dioxide

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