“…The use of deep eutectic solvents as both solvents and structure-directing agents to synthesize metal oxide nanoparticles was reported in the literature, such as in the synthesis of zeolite analogues, 11 ZnCo 2 O 4 as a supercapacitor material, 12 TiO 2 nanoparticles, 9,13 as an electrolyte for electrochromic devices, 14 for cathode recycling in lithium ion batteries, 15 and synthesis of reduced graphene oxide. 16 Moreover, DESs have been proved as efficient alternatives to commonly used acids such as HF and amines in the synthesis of faceted metal oxides and have exhibited high efficiency in photocatalysis as well as in photovoltaics.…”