Figure 2

(a) XRD patterns of TiO2@Fe2O3 nanotube arrays with different coating loops. (b,c) SEM images of representative TiO2@Fe2O3-600 sample and (d) the cross-section. Hollow interior construction can be detected in (c).

(a) XRD patterns of TiO2@Fe2O3 nanotube arrays with different coating loops. (b,c) SEM images of representative TiO2@Fe2O3-600 sample and (d) the cross-section. Hollow interior construction can be detected in (c).