journal article·2020-09-16

Femtosecond Laser Induced Phase Transformation of TiO2 with Exposed Reactive Facets for Improved Photoelectrochemistry Performance

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

ACS Applied Materials & Interfaces· Volume 12· Issue 37
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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.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of China, State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China

Tianjin Navigation Instruments Research Institute, Tianjin 300131, P. R. China

Han’s Laser Technology Industry Group Co., Ltd., Shenzhen, Guangdong Province 518126, P. R. China

Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States

Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China

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