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Strong piezocatalysis in barium titanate/carbon hybrid nanocomposites for dye wastewater decomposition.

Authors :
Chen L
Jia Y
Zhao J
Ma J
Wu Z
Yuan G
Cui X
Source :
Journal of colloid and interface science [J Colloid Interface Sci] 2021 Mar 15; Vol. 586, pp. 758-765. Date of Electronic Publication: 2020 Nov 05.
Publication Year :
2021

Abstract

In this work, the strong piezocatalysis is found in the two-step hydrothermally-synthesized barium titanate/carbon hybrid nanocomposites and is used for rhodamine B dye decomposition. As the carbon content increases from 0 to 5 wt%, the catalytic performance of hybrid nanocomposites first increases and then slightly decreases. When the carbon content increases to 2 wt%, the barium titanate/carbon hybrid nanocomposites exhibit the optimal piezocatalytic performance, which have the ~75.5% dye decomposition ratio and the ~0.04901 min <superscript>-1</superscript> reaction rate constant after the 40 min vibration stimulation, while that of the pure barium titanate are 48.4% and 0.01942 min <superscript>-1</superscript> , respectively. The improvement of piezocatalytic performance in barium titanate/carbon hybrid nanocomposites can be ascribed to the action of carbon's charge transfer which promotes the effective separation of the piezoelectrically-induced electric charges. After three runs recycle utilization tests, the barium titanate/carbon hybrid nanocomposites still exhibit ~70% decomposition ratio of rhodamine B dye. The strong piezocatalytic performance and the good reusability make the barium titanate/carbon hybrid nanocomposites potential in the field of wastewater treatment through utilizing natural vibration energy in future.<br />Competing Interests: Declaration of Competing Interest There are no conflicts to declare.<br /> (Copyright © 2020 Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1095-7103
Volume :
586
Database :
MEDLINE
Journal :
Journal of colloid and interface science
Publication Type :
Academic Journal
Accession number :
33213868
Full Text :
https://doi.org/10.1016/j.jcis.2020.10.145