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.
- Piezoelectric effect
- Pyroelectric effect
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering