Insights on the photocatalytic performances of LaFeO3 synthesized by solution combustion synthesis

A literature selection of the properties and performances of perovskite-type LaFeO3 prepared by solution combustion synthesis from different fuels is proposed in relation with their photocatalytic activity, particularly for the abatement of wastewater organic pollutants. In solution combustion synthesis, the fuel has the triple role of reducer, complexing agent and microstructural template, influencing both chemical-physical and photocatalytic properties of the perovskite powder. A specific dissertation is dedicated to LaFeO3 prepared by citric acid or by soluble bio-based substances extracted from urban waste, which are examined for the degradation of some phenolic derivatives and cationic dyes. Critical aspects related to the synthetic protocol are evidenced and LaFeO3 stability is also studied, considering the role of released substances, which can simultaneously initiate a photocatalytic process. It is highlighted that the fuel affects the reproducibility of LaFeO3 performance in the abatement of organic pollutants.