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Manipulating spin polarization of titanium dioxide for efficient photocatalysis

Author

Listed:
  • Lun Pan

    (Tianjin University
    Collaborative Innovative Center of Chemical Science and Engineering (Tianjin))

  • Minhua Ai

    (Tianjin University
    Collaborative Innovative Center of Chemical Science and Engineering (Tianjin))

  • Chenyu Huang

    (Tianjin University)

  • Li Yin

    (Tianjin University)

  • Xiang Liu

    (Tianjin University)

  • Rongrong Zhang

    (Tianjin University
    Collaborative Innovative Center of Chemical Science and Engineering (Tianjin))

  • Songbo Wang

    (Tianjin University
    Tianjin University of Science & Technology)

  • Zheng Jiang

    (Chinese Academy of Sciences
    Chinese Academy of Science)

  • Xiangwen Zhang

    (Tianjin University
    Collaborative Innovative Center of Chemical Science and Engineering (Tianjin))

  • Ji-Jun Zou

    (Tianjin University
    Collaborative Innovative Center of Chemical Science and Engineering (Tianjin))

  • Wenbo Mi

    (Tianjin University)

Abstract

Photocatalysis has been regarded as a promising strategy for hydrogen production and high-value-added chemicals synthesis, in which the activity of photocatalyst depends significantly on their electronic structures, however the effect of electron spin polarization has been rarely considered. Here we report a controllable method to manipulate its electron spin polarization by tuning the concentration of Ti vacancies. The characterizations confirm the emergence of spatial spin polarization among Ti-defected TiO2, which promotes the efficiency of charge separation and surface reaction via the parallel alignment of electron spin orientation. Specifically, Ti0.936O2, possessing intensive spin polarization, performs 20-fold increased photocatalytic hydrogen evolution and 8-fold increased phenol photodegradation rates, compared with stoichiometric TiO2. Notably, we further observed the positive effect of external magnetic fields on photocatalytic activity of spin-polarized TiO2, attributed to the enhanced electron-spin parallel alignment. This work may create the opportunity for tailoring the spin-dependent electronic structures in metal oxides.

Suggested Citation

  • Lun Pan & Minhua Ai & Chenyu Huang & Li Yin & Xiang Liu & Rongrong Zhang & Songbo Wang & Zheng Jiang & Xiangwen Zhang & Ji-Jun Zou & Wenbo Mi, 2020. "Manipulating spin polarization of titanium dioxide for efficient photocatalysis," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14333-w
    DOI: 10.1038/s41467-020-14333-w
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    Cited by:

    1. Jie Dai & Yawen Tong & Long Zhao & Zhiwei Hu & Chien-Te Chen & Chang-Yang Kuo & Guangming Zhan & Jiaxian Wang & Xingyue Zou & Qian Zheng & Wei Hou & Ruizhao Wang & Kaiyuan Wang & Rui Zhao & Xiang-Kui , 2024. "Spin polarized Fe1−Ti pairs for highly efficient electroreduction nitrate to ammonia," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Minhua Ai & Lun Pan & Chengxiang Shi & Zhen-Feng Huang & Xiangwen Zhang & Wenbo Mi & Ji-Jun Zou, 2023. "Spin selection in atomic-level chiral metal oxide for photocatalysis," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Jia-Rui Wang & Kepeng Song & Tian-Xiang Luan & Ke Cheng & Qiurong Wang & Yue Wang & William W. Yu & Pei-Zhou Li & Yanli Zhao, 2024. "Robust links in photoactive covalent organic frameworks enable effective photocatalytic reactions under harsh conditions," Nature Communications, Nature, vol. 15(1), pages 1-17, December.

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