J. Mater. Sci. Technol. ›› 2024, Vol. 202: 201-239.DOI: 10.1016/j.jmst.2024.02.071

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Recent advances in one-dimensional alkali-metal hexatitanate photocatalysts for environmental remediation and solar fuel production

Qiang Wanga,b,*, Xiaofan Yangc, Zhao Jingc, Hong Liu, Pengyi Tanga,b,*, Hongmin Zhud, Bing Lic,**   

  1. aNational Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    b2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    cSchool of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;
    dDepartment of Metallurgy, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
  • Received:2023-11-28 Revised:2024-01-31 Accepted:2024-02-02 Published:2024-12-10 Online:2024-04-09
  • Contact: *National Key Laboratory of Materials for Integrated Circuits, 2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China. E-mail addresses: wangqiang@mail.sim.ac.cn (Q. Wang), py.tang@mail.sim.ac.cn (P. Tang), **E-mail addresses: bingli@ecust.edu.cn (B. Li).

Abstract: The global energy crisis and environmental problems have become two unprecedented challenges. Semiconductor photocatalysis offers a promising strategy to solve them, while its practical application requires advanced photocatalytic materials. In recent years, one-dimensional (1D) alkali-metal hexatitanate (AHT) photocatalysts have attracted considerable attention in energy and environmental fields due to their high chemical stability, excellent photoactivity, unique ion-exchange, environment-friendly, and cost-effective properties. In this review, we firstly introduce the basic properties of AHT including crystal and electronic band structure, photoactivity, and structure-property-performance relationship. Secondly, the recent advances in synthesis and modification strategies of 1D AHT photocatalysts are summarized thoughtfully, followed by a comprehensive discussion on their various environmental and energy applications, including pollutant degradation, H2 generation, and CO2 reduction. Finally, the key challenges and prospects are also highlighted for the development of high-performance 1D AHT-based photocatalysts for practical applications. We hope that this review will shed some light on the rational design of 1D Ti-O-based nanomaterials for efficient environmental remediation and solar fuel production.

Key words: Alkali-metal hexatitanates, One-dimensional nanomaterials, Photocatalysis, Pollutant degradation, Solar fuels