Univariate Lattice Parameter Modulation of Single-Crystal-like Anatase TiO2 Hierarchical Nanowire Arrays to Improve Photoactivity

  • Wei Wen*
    Wei Wen
    College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, P. R. China
    *Email: [email protected]
    More by Wei Wen
  • Jianhang Hai
    Jianhang Hai
    College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, P. R. China
    More by Jianhang Hai
  • Jincheng Yao
    Jincheng Yao
    College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, P. R. China
    More by Jincheng Yao
  • Yi-Jie Gu
    Yi-Jie Gu
    State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    More by Yi-Jie Gu
  • Hisayoshi Kobayashi*
    Hisayoshi Kobayashi
    Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
    *Email: [email protected]
  • He Tian
    He Tian
    State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    More by He Tian
  • Tulai Sun
    Tulai Sun
    State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Tulai Sun
  • Qiongyang Chen*
    Qiongyang Chen
    State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    *Email: [email protected]
  • Peng Yang
    Peng Yang
    College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, P. R. China
    More by Peng Yang
  • Chao Geng
    Chao Geng
    College of Mechanical and Electrical Engineering, Hainan University, Haikou 570228, P. R. China
    More by Chao Geng
  • , and 
  • Jin-Ming Wu*
    Jin-Ming Wu
    State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
    *Email: [email protected]
    More by Jin-Ming Wu
Cite this: Chem. Mater. 2021, 33, 4, 1489–1497
Publication Date (Web):February 8, 2021
https://doi.org/10.1021/acs.chemmater.1c00089
Copyright © 2021 American Chemical Society
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Abstract

Strain engineering is a highly effective tool for tuning the lattice parameter and in turn optimizing the optical, electronic, and chemical properties of numerous functional materials. In conventional methods, the strain is imposed from an additional heterogeneous substrate, bringing extra composition/phase that disturbs the mechanism investigations of the effects of lattice parameters on material properties. Here, we report a convertible-precursor-induced growing method to fulfill the elongation of the uniaxial lattice parameter of anatase TiO2 with a complex structure of single-crystal-like hierarchical arrays, without changing the composition, morphology, phase, and surface states. This methodology relies on a precursor-induced oriented growth and lattice parameter modulation on the basis of the lattice mismatch from the precursor. Unlike conventional substrate-manipulating methods, the employed precursor can be converted to the final materials (i.e., anatase TiO2), which can eliminate the effects of the additional substrate. It is found that for anatase TiO2, the elongation of lattice parameter a leads to the shift-up of the conduction band bottom and can thus accelerate the reduction reactions of O2. The elongation of lattice parameter a and unique structural features make the TiO2 arrays highly active for photocatalytic degradation of toluene in air, with a turnover frequency (TOF) 3.8 times and 2.1 times, respectively, that of the normal TiO2 arrays and P25 powder under ultraviolet irradiation. The enhanced reduction capability is further confirmed by the much-improved efficiency to assist the photoreduction of Cr(VI) in water.

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  • Experimental methods, XRD patterns, SEM images, TEM images, HRTEM images, SAED patterns, 3D reconstruction, BET characterization results, XPS spectra, UV–vis DRS results, DMPO spin-trapping EPR results, DFT calculation results, and electrochemical performances for energy storage (PDF)

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Cited By


This article is cited by 3 publications.

  1. Mohammed Ismael. Latest progress on the key operating parameters affecting the photocatalytic activity of TiO2-based photocatalysts for hydrogen fuel production: A comprehensive review. Fuel 2021, 303 , 121207. https://doi.org/10.1016/j.fuel.2021.121207
  2. Jielin Wang, Jieyuan Li, Wenjia Yang, Yongyi Liu, Hong Wang, Qin Geng, Fan Dong. Promote reactants activation and key intermediates formation for facilitated toluene photodecomposition via Ba active sites construction. Applied Catalysis B: Environmental 2021, 297 , 120489. https://doi.org/10.1016/j.apcatb.2021.120489
  3. Qi Jin, Wei Wen, Shilie Zheng, Rui Jiang, Jin-Ming Wu. Branching TiO 2 nanowire arrays for enhanced ethanol sensing. Nanotechnology 2021, 32 (29) , 295501. https://doi.org/10.1088/1361-6528/abf5a0