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Magnetically retrievable Fe 3 O 4 @SiO 2 @ZnO piezo-photocatalyst: Synthesis and multiple catalytic properties.
- Source :
-
Journal of colloid and interface science [J Colloid Interface Sci] 2023 Apr 15; Vol. 636, pp. 167-175. Date of Electronic Publication: 2023 Jan 05. - Publication Year :
- 2023
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Abstract
- The piezo-/photocatalytic effects of ZnO have been in the limelight because of their great potential in environmental remediation and energy conversion. However, the poor recyclability of the suspended catalysts can cause inevitable secondary pollution, which is one of the major issues that limit the practical application of these materials. To address this problem, a magnetically retrievable Fe <subscript>3</subscript> O <subscript>4</subscript> @SiO <subscript>2</subscript> @ZnO nanocomposite was designed and successfully synthesized by multi-step reactions. The ZnO nanorods were vertically grown on the surface of the magnetic Fe <subscript>3</subscript> O <subscript>4</subscript> @SiO <subscript>2</subscript> microspheres, while SiO <subscript>2</subscript> served as an insulator to protect the inner core and to inhibit charge transfer across the core/shell interface. The Fe <subscript>3</subscript> O <subscript>4</subscript> @SiO <subscript>2</subscript> @ZnO nanocomposite can be easily collected and separated by using a magnetic field. Along with the good recyclability, the material also exhibited high efficiencies in piezocatalytic, photocatalytic and piezo-photocatalytic dye degradation processes. The rate constant of piezo-photocatalysis reached 95.9 × 10 <superscript>-3</superscript> min <superscript>-1</superscript> , which was 2.2 and 6.1 times that of the individual piezocatalysis and photocatalysis, respectively. The present result confirmed the existence of a synergetic effect between piezo- and photocatalytic processes. Hereby, we demonstrated that incorporation of a magnetic carrier is a feasible strategy to achieve retrievable and highly efficient piezo-/photocatalyst.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2023 Elsevier Inc. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1095-7103
- Volume :
- 636
- Database :
- MEDLINE
- Journal :
- Journal of colloid and interface science
- Publication Type :
- Academic Journal
- Accession number :
- 36628899
- Full Text :
- https://doi.org/10.1016/j.jcis.2023.01.009