On September 24, 2019,Nano Energy published online the latest findings on catalytic mechanism induced by calendering polarization by the research team headed by Prof. ZHAI Jiwei, School of Material Science and Engineering of Tongji University. The research reveals the internal relationship between the enhanced voltage potential of homotype heterojunction and the catalytic reaction rate, and interprets the catalytic oxidation mechanism of the synergistic promotion of voltage potential and electrochemical potential to the rapid separation and transfer of charge carriers from a new perspective.
The paper entitled“Piezophototronic effect in enhancing charge carrier separation and transfer in ZnO/BaTiO3 heterostructures for high-efficiency catalytic oxidation”was contributed by corresponding author Prof. ZHAI Jiwei of Tongji University and first author ZHOU Xiaofeng, PhD candidate of Schoolof Material Science and Engineering.
Piezoelectric effect, which is produced by the coupling of piezoelectric, photoexcitation and semiconductor characteristics, has been widely used in the optimization, upgrading and improvement design of light emitting diodes (LEDs), photodetectors, photocells, solar cells and other optoelectronic devices. However, due to the application of charge carriers excited by piezoelectric effect in the fields of environmental purification, hydrogen production from photolysis of water or chemical synthesis, most of the related researches remain at the level of practical cognition or do not deeply explore the intrinsic correlation between excited electrons and physical and chemical phenomena. In this context, it is particularly relevant to constructing piezoelectric semiconductors with enhanced piezoelectric effect and excellent physical and chemical properties.
Figure: Specific ultrasound excitation of ZnO/BaTiO3heterostructures and the mechanism
About the paper:
Full-text paper “Piezophototronic effect in enhancing charge carrier separation and transfer in ZnO/BaTiO3 heterostructures for high-efficiency catalytic oxidation” is available at https://authors.elsevier.com/a/1Zpha7soS7u1Or.
Source (in Chinese): https://smse.tongji.edu.cn/info/1010/3667.htm