Preparation of NaTaO₃ by Spray Pyrolysis and Evaluation of Apparent Photocatalytic Activity for Hydrogen Production from Water

Figure 6

SEM images of NaTaO₃ powders synthesized by spray pyrolysis with variation of spray pyrolysis temperature: (a) 973 K, (b) 1073 K, (c) 1173 K, (d) 1273 K (mean residence time = 1.80 seconds, precursor preparation temperature = 333 K, precursor concentration = 0.125 M, carrier gas (air) flow rate = 5 L/min, Na/Ta = 1.00).

(a)

(b)

(c)

(d)