Piezoelectrically/pyroelectrically-driven vibration/cold-hot energy harvesting for mechano-/pyro- bi-catalytic dye decomposition of NaNbO3 nanofibers

• Published in: Nano energy Vol. 52; pp. 351 - 359
• Main Authors: You, Huilin, Ma, Xinxiu, Wu, Zheng, Fei, Linfeng, Chen, Xiaoqiu, Yang, Jie, Liu, Yongsheng, Jia, Yanmin, Li, Huamei, Wang, Feifei, Huang, Haitao
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2018
• Subjects: Bi-catalysis; NaNbO3; Piezoelectric effect; Pyroelectric effect; Bi-catalysis; Pyroelectric effect; Piezoelectric effect; NaNbO3
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2018.08.004

In this work, a high efficient mechano-/pyro- bi-catalysis for dye wastewater decomposition is found in the hydrothermally-synthesized NaNbO3 nanofibers through piezoelectrically and pyroelectrically harvesting vibration and cold-hot energy. In response to vibration together with 15–50 °C cold-hot cycles, the bi-catalytic decomposition ratio of NaNbO3 nanofibers can be up to 86.5%, which is higher than that of the pyro-catalysis of ~ 63.3% or the mechano-catalysis of ~ 75.8%. Such mechano-/pyro- bi-catalysis of NaNbO3 nanofibers possesses the advantages of high efficiency, environmental benignity and being easily scaled up. Therefore, NaNbO3 may become a potential candidate for mechano-/pyro- bi-catalysis through utilizing ubiquitous vibration and thermal energy. [Display omitted] •The NaNbO3 nanofibers were hydrothermally synthesized.•The mechano-/pyro- bi-catalysis of NaNbO3 nanofibers was realized.•Bi-catalysis is superior to mechano- or pyro-catalysis in dye decomposition.•NaNbO3 is potential in harvesting mechanical/thermal energy for wastewater treatment.