Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 29, Pages 34202-34212Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c07340
Keywords
borate; CsCdBO3; photocatalytic; polarization; piezoelectric effect
Funding
- National Key Research and Development Project of China [2019YFC1803404]
- National Natural Science Foundation of China [51772325]
- Guangdong Basic and Applied Basic Research Foundation [2021A1515010375]
- Fundamental Research Funds for the Central Universities [21620419]
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A new type of piezoelectric borate material, CsCdBO3, shows high efficiency for the degradation of organic pollutants under the synergistic effects of strain and light conditions. The strain-driven polarized electric field promotes the separation of electron-hole pairs, enhancing the photocatalytic activity in environmental remediation.
Piezoelectrically polarized electric field can provide a strong driving force for the separation of the photoinduced charge carriers that has attracted a wide attention in the field of photocatalysis. In this paper, a new type of piezoelectric borate material CsCdBO3 exhibits a high efficiency for the degradation of typical organic pollutants under the synergistic effects of strain and light conditions. The oxidation rate constant of the synergistic effect is 0.653 min(-1), which is 3.77 times that of just under visible light irradiation. Further, the material shows a higher efficiency when treated both under the clockwise stirring direction and a high stirring speed. A characteristic piezoresponse hysteresis loop was detected using the piezoresponse force microscopy (PFM) approach. The strain-driven polarized electric field facilitates to promote the photoinduced electron-hole pair separation, thus enhancing the photocatalytic activity. The present work provides a new direction of the borate with a noncentrosymmetric structure in the environmental remediation.
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