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Published on: February 20, 2019
Constructing a 1D/2D piezoelectric Bi2O2CO3/PbTiO3 heterostructure for improving carrier separation and
Yukai Chen1, Yiyi Ji1, Ruizhe Wang1
1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
Abstract:
Photocatalytic efficiency is limited by the recombination of photoinduced electrons and holes. To improve carrier separation, it is essential to develop heterojunctions and internal piezoelectric fields. In this work, a novel Bi2O2CO3/PbTiO3 (BOC/PTO) heterojunction exhibiting a dual piezoelectric effect is introduced for the first time. The integration of PTO nanofibers with BOC nanosheets increases the contact areas, amplifying deformation and enhancing the piezoelectric effect. The interplay between the heterojunction and piezoelectric field significantly promotes the separation of photoinduced carriers, thereby improving catalytic performance. Profiting from this carrier separation, the 20% BOC/PTO composite shows 2.7 times the efficiency of PTO. Moreover, its photo-piezoelectric catalytic efficiency is two times that of pure photocatalysis and three times that of piezoelectric catalysis, demonstrating the effectiveness of the collaboration of the piezoelectric effect and photocatalysis. This strategy offers a promising approach for controlling carrier dynamics to achieve more efficient photocatalytic reaction.
