Piezo-photocatalytic activity of Bi2VO5.5 for methylene blue dye degradationopen access
- Authors
- Kumar, Manish; Vaish, Rahul; Elqahtani, Zainab Mufarreh; Kebaili, Imen; Al-Buriahi, M. S.; Sung, Tae Hyun; Hwang, Wonseop; Kumar, Anuruddh
- Issue Date
- Nov-2022
- Publisher
- ELSEVIER
- Keywords
- Bi2VO5.5; Photocatalysis; Piezocatalysis; Piezo-photocatalysis; Germination index
- Citation
- JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v.21, pp.1998 - 2012
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
- Volume
- 21
- Start Page
- 1998
- End Page
- 2012
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185213
- DOI
- 10.1016/j.jmrt.2022.09.130
- ISSN
- 2238-7854
- Abstract
- This study comprises the combined effect of piezocatalytic and photocatalytic activity to obtain improved piezo-photocatalytic dye degradation efficiency in visible light. Single-phase Bi2VO5.5 powder was prepared through solid-state synthesis at 750 degrees C in 8 h. Time-dependent photo-current responses were conducted to understand the phenomenon of charge carrier transport in visible light. Bi2VO5.5 powder sample demonstrated high photocatalytic efficiency and good reusability possessing a bandgap value of 2.13 eV. Bi2VO5.5 powder sample attained 70% and % degradation efficiency during photocatalysis and piezocatalysis respectively. The piezo-photocatalytic methylene blue dye attained similar to 82% degradation efficiency in 240 min duration of visible light illumination. The scavenger test depicted holes (h(+)) as the principal active species in the piezo-photocatalytic dye degradation. There incurred no severe loss in photocatalytic efficiency even after 4 cycles which proclaims the reusability of the Bi2VO5.5 powder sample. A study on the kinetic rate constant with varying dye concentrations was conducted. With varied dye concentration of 5, 10, 15 mg/L, the kinetic rate constant obtained was 0.00528, 0.0030, and 0.00125 min(-1), respectively. Germination index was found through a phytotoxicity test using vigna radiata seeds. Here visible light along with mechanical energy has been used to achieve higher MB dye degradation efficiency through piezo-photocatalysis.
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