University of Oulu

Zhuomin Qiang, Shiwen Zhu, Taohai Li, Feng Li, Excellent photo- and sono- catalytic BiOF/Bi2O3 heterojunction nanoflakes synthesized via pH-dependent and ionic liquid assisted solvothermal method, Materials Today Communications, Volume 23, 2020, 100980, ISSN 2352-4928, https://doi.org/10.1016/j.mtcomm.2020.100980

Excellent photo- and sono- catalytic BiOF/Bi₂O₃ heterojunction nanoflakes synthesized via pH-dependent and ionic liquid assisted solvothermal method

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Author: Qiang, Zhuomin1; Zhu, Shiwen1; Li, Taohai1,2;
Organizations: 1College of Chemistry, Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, 411105, China
2Nano and Molecular Materials Research Unit, Faculty of Science, University of Oulu, P.O. Box 3000, FIN-90014, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202102255974
Language: English
Published: Elsevier, 2020
Publish Date: 2022-02-07
Description:

Abstract

Herein, a series of BiOF/Bi₂O₃ heterojunction nanoflakes were designed. The XRD and TEM confirm that the phase structure and morphology of BiOF/Bi₂O₃ were affected by the pH value of the precursors. The catalytic activities were investigated in different catalytic ways including photocatalytic activity under ultraviolet light, photocatalytic activity under visible light and sonocatalytic activity under ultrasonic irradiation. It concluded that the catalytic performances of BiOF/Bi₂O₃ are substantially affected by laboratorial pH values. The BiOF/Bi₂O₃ prepared at lower pH values exhibited enhanced catalytic activity attributed to the favorable morphology and band gap energy. Meanwhile, it shows excellent sonocatalytic performances due to the synergistic effect of BiOF/Bi₂O₃ and H₂O₂ in sonocatalytic process. The sonodegradation efficiencies of rhodamine B reaches 95.28 % in the presence of three drops of H₂O₂ within 10 min of ultrasonic irradiation. The catalytic mechanism reveals that ·OH as the dominant active specie plays a key role in degrading the dyes both under UV light illumination and ultrasonic irradiation.

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Series: Materials today communications
ISSN: 2352-4928
ISSN-E: 2352-4928
ISSN-L: 2352-4928
Volume: 23
Article number: 100980
DOI: 10.1016/j.mtcomm.2020.100980
OADOI: https://oadoi.org/10.1016/j.mtcomm.2020.100980
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Funding: The authors acknowledge with thanks the financial support of Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization and the National Natural Science Foundation of China (21343008; 21601149). Feng Li thanks the support of China Scholarship Council.
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/