1. Synthesis of Bi4Ti3O12 decussated nanoplates with enhanced piezocatalytic activity
- Author
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Jiang Wu, Enzhu Lin, Baowei Yuan, Dinghua Bao, Ni Qin, and Zihan Kang
- Subjects
Nanostructure ,Materials science ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Piezoelectricity ,Titanate ,Hydrothermal circulation ,0104 chemical sciences ,Characterization (materials science) ,law.invention ,Catalysis ,Chemical engineering ,law ,General Materials Science ,0210 nano-technology ,Electron paramagnetic resonance ,Perovskite (structure) - Abstract
A variety of nanostructured Bi4Ti3O12 materials with diverse morphologies were synthesized by a novel hydrothermal method using layered titanate Na2Ti3O7 as a synthetic precursor. Among these materials, decussated nanoplates exhibit superior piezocatalytic activity compared with other piezocatalysts of the perovskite family. The enhanced piezocatalytic activity is attributed to the large piezoelectric potential difference and the short distance between polar surfaces, which may help enhance the driving force of charge transport. The finite element method (FEM) simulation of piezoelectric response in different Bi4Ti3O12 nanostructures was performed to illustrate the influence of morphological features on the piezocatalytic performance. The catalytic mechanism of Bi4Ti3O12 was investigated by the detection and characterization of free radicals and intermediate products with electron spin resonance (ESR) spin-trapping technique and liquid chromatography-mass spectrometry (LC-MS). This work may push forward the development of piezocatalytic materials, and provide insights into piezocatalysis for environmental applications.
- Published
- 2019
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