Balancing the piezoelectric coefficient and carrier concentration of Bi2WO6-x for ultrahigh piezocatalysis. (IMAGE)

Tsinghua University Press

Balancing the piezoelectric coefficient and carrier concentration of Bi2WO6-x for ultrahigh piezocatalysis.

Caption

The piezoelectric coefficient and carrier concentration of Bi2WO6 were adjusted by introducing oxygen vacancies, and the corresponding effects on the performance of piezocatalytic hydrogen generation were studied. Although the increasing of concentration of oxygen vacancies will inhibit the piezoelectric coefficient, it increases the carrier concentration inverse, and the hydrogen production rate exhibits a volcanic pattern. The piezoelectric coefficient and carrier concentration as two factors jointly determine the piezocatalytic performance. The optimal hydrogen production rate per power of 2.21 μmol g–1 h–1 W–1 is equivalent and even better than that of most reported piezocatalysts.

Credit

Journal of Advanced Ceramics, Tsinghua University Press

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