期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 52, 期 14, 页码 7842-7848出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.8b00946
关键词
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资金
- National Natural Science Foundation of China [21761142011, 21407106, 21522703]
- Ministry of Education of China [PCSIRT_IRT_16R49]
- International Joint Laboratory on Resource Chemistry (IJLRC)
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
The introduction of a piezoelectric field has been proven a promising method to enhance photocatalytic activity by preventing photo-electron-hole recombination. However, the formation of a piezoelectric field requires additional mechanical force or high-frequency ultrasonic baths, which limits its potential application on industrial scale. Therefore, it is of great practical significance to design the catalyst that can harvest the discrete energy such as the fluid mechanical energy to form the electric field. Herein, PZT/TiO2 catalyst with a core-shell configuration was prepared by a simple coating method. By collecting the mechanical energy of water, an internal piezoelectric field was induced. Under 800 rpm stirring, transient photocurrent measured on PZT/TiO2 electrode is about 1.7 times higher than that of 400 rpm. Correspondingly, the photocatalytic degradation rate and mineralization efficiency of RhB, BPA, phenol, p-chlorophenol much improved, showing the promoting effect of piezoelectric field generated directly from harvesting the discrete fluid mechanical energy.
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