Fig. 3
From: Oxygen vacancy associated single-electron transfer for photofixation of CO2 to long-chain chemicals

Structure characterizations for the defect-controlled Bi2O3 nanosheets. a Atomic-resolution HAADF-STEM images and corresponding structure model of OV-rich-Bi2O3 nanosheets. The scale bar is 2 nm. b O 2p XPS spectra, c Room-temperature ESR spectra, and d PL spectra of Bi2O3 nanosheets with rich and poor oxygen vacancies, respectively