In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 47, No. 7 ( 2023), p. 3471-3480
Abstract:
In this work, the construction of heterostructures is considered to be an outstanding method to enhance the decomposition ratio in the piezocatalysis process. Piezoelectric BiFeO 3 /ZnO heterostructure nanomaterials synthesized via a mixing–calcining method exhibit an enhanced piezocatalysis performance through collecting vibration energy to decompose rhodamine B (RhB) dye. After undergoing 180 min vibration, with the different ZnO contents of 0 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt% and 5 wt%, the BiFeO 3 /ZnO heterostructures can respectively decompose 73.4%, 87.0%, 96.9%, 92.9%, 67.9% and 55.1% RhB dye. The kinetic rate constant of the RhB dye decomposition is 21.0 × 10 −3 min −1 for the BiFeO 3 /2%ZnO heterostructures, while it is only 7.37 × 10 −3 min −1 for the BiFeO 3 . The reason for the enhanced piezocatalytic dye decomposition ratio may be that the heterostructure effectively separates the positive and negative charges to reduce the recombination of the positive and negative charges. These main medium active species such as hydroxyl radicals (˙OH) in the process of piezocatalysis are confirmed on the basis of the results of both electron spin resonance and active species capture experiments. The BiFeO 3 /ZnO heterostructures, with a strongly enhanced piezocatalytic dye decomposition performance, offer a promising option to treat wastewater through collecting environmental vibration energy in the future.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
622959-1
detail.hit.zdb_id:
1472933-7
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