Abstract
Meeting the global challenge of water availability necessitates diversification from traditional water treatment methods to other complementary methods, such as photocatalysis and photoelectrocatalysis (PEC), for a more robust solution. Materials play very important roles in the development of these newer methods. Thus, the quest and applications of a myriad of materials are ongoing areas of water research. Perovskite and perovskite-related materials, which have been largely explored in the energy sectors, are potential materials in water treatment technologies. In this review, attention is paid to the recent progress in the application of perovskite materials in photocatalytic and photoelectrocatalytic degradation of organic pollutants in water. Water treatment applications of lanthanum, ferrite, titanate, and tantalum (and others)-based perovskites are discussed. The chemical nature and different synthetic routes of perovskites or perovskite composites are presented as fundamental to applications.
Highlights
A perovskite by definition is a material with the same crystal structure as CaTiO3, BaTiO3, CaSiO3, or SrTiO3
Research has geared toward photocatalytic materials that are capable of absorbing light in the visible region
Few photoelectrocatalysis degradation reports discussed here show that synergy of photocatalysis and electrolysis promotes better degradation performance
Summary
A perovskite by definition is a material with the same crystal structure as CaTiO3, BaTiO3, CaSiO3, or SrTiO3. Primitive cubic is the idealized structure, the differences in radii between both cations can distort the structure This normally involves tilting of the BO6 units (octahedral tilting; Kong et al, 2019). This review is in addition to the existing body of knowledge around AOPs for water treatment It is distinct as it focuses on the application of perovskites in advanced oxidation processes related to water treatment. Perovskite and perovskite-related materials are considered as third-generation photocatalysts which form a stable structure and solid solution with several ranges of metal ions to achieve the appropriate band engineering for photoelectrocatalytic applications (Yang et al, 2009; Kong et al, 2019). The choice of method of preparation is a top priority
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