Figure 6From: Effects of acid on the microstructures and properties of three-dimensional TiO2 hierarchical structures by solvothermal methodTypical FESEM and TEM images of the products. Products synthesized at various HCl concentrations: (a) 0, (b) 0.45 M, (c and d) 0.68 M, (e and f) 1.12 M and (g and h) 1.35 M. (c), (e), and (g) are overview FESEM images. (d), (f), (h) and the insets are enlarged TEM and FESEM images of the surfaces of the corresponding samples.Back to article page