Figure 1

(a) Schematic diagrams of the continuous hydrothermal flow synthesis reactor system. FeSO₄ = Iron sulphate, VOSO₄ = vanadium oxide sulphate hydrate and H₃PO₄ = phosphoric acid; P = pump; LiOH = Lithium hydroxide. (b) Outlines the mixing head, the central component of the apparatus where the reagents are combined.