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Zhenfeng Bian1

1, Shanghai Normal University, Shanghai, , China

Piezoelectric effect induced by piezoelectric polarization has been widely applied in nano-generators, piezoelectric field effect transistors, flexible piezoelectric sensors and so on. Recently, the application of piezoelectric effect in environmental purification and hydrogen production has also attracted the attention of researchers. At present, the research of piezoelectric catalysis is mainly focused on one-dimensional piezoelectric / ferroelectric materials, such as BaTiO3 one-dimensional structure, PZT fiber, single layer or few layers self-assembly sheet structure of MoS2. For example, the dendritic structure of BaTiO3 achieves the degradation of azo dye and hydrogen production. One or two dimensional material bent easily by mechanical force, thus generating opposite polarity charge (piezoelectric potential) on the two opposite sides. Thus, the formed piezoelectric field can induce charge migration. In photocatalytic process, charge separation is an important factor affecting photocatalytic efficiency. The separation of photogenerated charge driven by piezoelectric potential is a very effective way to improve photocatalytic efficiency. Through the combination of piezoelectric and photocatalytic properties, the efficient separation of electrons and holes was demonstrated. This provides a new idea for the design and fabrication of new environmental purification materials.

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