Research Article

Preparation, Characterization, and Enhanced Photocatalytic Hydrogen Evolution Activity of -Based Compounds under Simulated Sunlight Irradiation

Figure 4

SEM images of the as-prepared photocatalysts calcined at 950°C: (a) TiO2-Y2Cu2O5 preared by the sol-gel approach; (b) TiO2-Y2Cu2O5 prepared by the solid state reaction; (c) Y2Cu2O5 prepared by the solid state reaction.
852139.fig.004a
(a)
852139.fig.004b
(b)
852139.fig.004c
(c)