期刊
NANO ENERGY
卷 85, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105949
关键词
Piezoelectric; Photocatalytic hydrogen production; SrTiO3; Ultrasonic cavitation
类别
资金
- National Natural Science Foundation of China [51971128]
- Program of Shanghai Academic/Technology Research Leader [20XD1401800]
- Science and Technology Commission of Shanghai Municipality [19020501000]
The study examined the influence of piezoelectric effect on the photocatalytic hydrogen production of STO nanoparticles, showing that ultrasound cavitation can inhibit the migration of photo-generated carriers. This finding suggests that combining ultrasound with photocatalysis can significantly impact the efficiency of hydrogen production.
Combining photocatalysis with the other physical-field is an efficient way to improve the performance of photocatalysis. The piezoelectric effect on the heterogeneous photocatalytic hydrogen production of SrTiO3 (STO) nanoparticles was studied in this paper. It was found that the piezoelectric effect generated by the ultrasonic cavitation (sonophotocatalysis) had a profound influence on heterogeneous photocatalytic hydrogen production with or without sacrificial agents. Notably, the sonophotocatalytic hydrogen production of STO was related to the viscosity of sacrificial agents and the position of the ultrasonic vibrators. The mechanism of the performance changes by sonophotocatalysis was investigated by in-situ deposition Pt nanoparticles, which were found to aggregate obviously on STO nanoparticles' surface. Thus, ultrasonic cavitation would build a piezoelectric potential on the local surface of STO that would inhibit photo-generated carriers migrating to the surface.
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