Figure 1From: Nb, F-codoped TiO2 hollow spheres with high visible light photocatalytic activityThe morphology and structure characterization of NFTSs. (a) SEM image, (b) a magnification of the SEM image of typical broken hollow spheres, (c) SAED image, (d) TEM images, (e) HRTEM image, and (f) XRD patterns of the NFTS sample.Back to article page