Boosting Piezo/Photo-Induced Charge Transfer of CNT/Bi4O5I2 Catalyst for Efficient Ultrasound-Assisted Degradation of Rhodamine B |
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| Authors: | Yang Wang Dongfang Yu Yue Liu Xin Liu Yue Shi |
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| Affiliation: | 1.Chang Wang School of Honors, Nanjing University of Information Science and Technology, Nanjing 210044, China; (Y.W.); (Y.S.);2.School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; (Y.L.); (X.L.) |
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| Abstract: | Strain-induced internal electric fields present a significant path to boosting the separation of photoinduced electrons and holes. In addition, piezo-induced positive/negative pairs could be released smoothly, taking advantage of the excellent electroconductibility of some conductors. Herein, the hybrid piezo-photocatalysis is constructed by combining debut piezoelectric nanosheets (Bi4O5I2) and typical conductor multiwalled carbon nanotubes (CNT). The photocatalytic degradation efficiency that the hybrid CNT/Bi4O5I2 exhibits was remarkably increased by more than 2.3 times under ultrasonic vibration, due to the piezo-generated internal electric field. In addition, the transient photocurrent spectroscopy and electrochemical impedance measurement reveal that the CNT coating on Bi4O5I2 enhances the piezo-induced positive/negative migration. Therefore, the piezocatalytic activity of CNT/Bi4O5I2 could be improved by three times, compared with pure Bi4O5I2 nanosheets. Our results may offer promising approaches to sketching efficient piezo-photocatalysis for the full utilization of solar energy or mechanical vibration. |
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| Keywords: | piezocatalysis CNT/Bi4O5I2 mechanical vibration charge transfer |
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