“…Surface area of the material can be increased, increasing thus its photocatalytic ability under visible radiation (Wang et al 2017b); likewise, particle-type nanocomposites offer the opportunity to integrate the ferroelectric, ferromagnetic and optical properties of BFO with the physical properties of other materials to enhance its potential for applications (Liu and Wu 2019). To this end, various synthesis methods have been developed to obtain BFO compounds as powders with different crystal sizes, different morphologies and nanocomposites (Rojas-Flores et al 2019;Tian et al 2019) such as sol-gel (Maleki 2018), conventional hydrothermal (Wang et al 2018a), coprecipitation (Wang et al 2018b), combustion reaction (Singh et al 2018), sonochemistry (Bismibanu et al 2018), solid state (Sharma et al 2019), Pechini (Casanova Monteiro et al 2018), molten salts (Wu and Zhu 2019), and microwave-assisted hydrothermal (Sun et al 2018). However, implementing synthesis methods such as solid state or sol-gel to obtain BFO often result in the formation of parasitic phases (i.e., Bi 25 FeO 39 and Bi 2 O 3 ) (Rojac et al 2014) while requiring high calcination temperatures.…”