Fig. 1
From: Tuning defects in oxides at room temperature by lithium reduction

Pristine and lithium-reduced oxide nanoparticles. a Photograph of TiO2. b XRD patterns of TiO2. c Photograph of ZnO, SnO2, and CeO2, respectively. d–f XRD patterns of ZnO, SnO2, and CeO2, respectively