Recent developments in strategies to enhance pyrocatalysis of pyroelectric perovskite nanomaterials for water purification

Abstract

Industrial emissions have spurred the development of innovative technologies for water purification. Under cooling or heating excitation such as the natural temperature variations, pyroelectric perovskite materials can generate plenty of positive and negative electric charges to pyrocatalytically drive water purification, which is a novel green technology and has emerged as a promising water treatment solution. Currently, the tedious time for cooling-heating alternation excitation is inevitable in order to obtain the high pyrocatalytic degradation performance on organic pollutions in water solution. How to further enhance the pyrocatalytic performance is the key for the future practical application. On the basis of the deep analysis of the pyro-electro-chemical coupling mechanisms, this review comprehensively concludes some effective strategies to enhance pyrocatalysis of perovskite for water purification including increasing polarization strength, modulating microstructure, optimizing surface and interface regulation and building the multicatalysis synergy between pyrocatalysis and piezo-/photocatalysis. This review outlines a roadmap for future research on efficient pyrocatalytic water purification application through utilizing environmental temperature fluctuations such as the natural day and night alternation.