Relationship between secondary phase and photocatalytic activity in titanium-doped bismuth ferrite nanocrystals

Micro & nano letters

article

Lili Wang¹  Shuai Meng¹  Guoli Chen¹  Xiaodong Yang¹  Yan Yan¹  Rui Chen¹ 

[1] College of Science, Key Laboratory of Materials Design and Quantum Simulation and College of Science, Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement, Changchun University

关键词: titanium;    nanostructured materials;    ferrites;    X-ray diffraction;    X-ray photoelectron spectra;    doping;    transmission electron microscopy;    nanofabrication;    bismuth compounds;    Raman spectra;    sol-gel processing;    photocatalysis;    nanomagnetics;    secondary phase;    photocatalytic activity;    titanium-doped bismuth ferrite nanocrystals;    sol-gel methods;    X-ray diffraction;    Raman spectra;    high-resolution transmission electron microscopy images;    X-ray photoelectron spectroscopy characterisations;    spontaneous formation;    heterostructure;    staggered energy bands;    BiFeO3Ti;   

DOI  :  10.1049/mnl.2020.0223

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Doping is an effective way to enhance photocatalytic activity. Herein, the authors have synthesised a series of BiFe 1− x Ti x O 3 ( x = 0, 0.05, 0.10, 0.15, 0.20) nanocrystals through sol–gel methods. X-ray diffraction, Raman spectra, high-resolution transmission electron microscopy images and X-ray photoelectron spectroscopy characterisations indicate doping could facilitate the formation of Bi 2 Fe 4 O 9 phase at low content, while inhibiting this formation at high content. Interestingly, the appearance of Bi 2 Fe 4 O 9 improved the photocatalytic activity, which may be attributed to the spontaneous formation of heterostructure between Bi 2 Fe 4 O 9 and BiFeO 3 phases. The staggered energy bands between these two phases could effectively separate electrons and holes, resulting in enhanced photocatalytic performance.

【 授权许可】

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