*2.3. Synthesis of BiVO4*

This procedure was performed according to method proposed by [22]. For this step, 0.4850 g of Bi(NO3)3.5H2O was transferred into a falcon tube containing 5 mL of ethylene glycol and sonicated for 40 min. A mass of 0.1175 g of NH4VO3 was transferred into a falcon tube containing 5 mL of water and heated in a water bath until complete dissolution. The latter solution was then dropped slowly into the former solution under constant stirring, causing the formation of a yellow BiVO4 suspension.
