Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies

Local Structure Investigation of Mn‐ and Co–Doped TiO2 Thin Films by X‐Ray Absorption Spectroscopy

“…Similar change in the phase structure from anatase to rutile phase after incorporation of Li in TiO 2 matrix is observed by Zhou et al. . The change in the oxidation state Ti +4 to Ti +3 will shift the peak at the lower energy side.…”

“…The spectral peaks between 537 eV and 550 eV for anatase and rutile phase TiO 2 have been presented in the works of Zhou et al. and Ruus et al ,. The rutile phase shows three low resolved peaks in this region and anatase phase will give two well resolved peaks.…”

“…The resonance peaks denoted by A 1 and A 2 (consist of A 2 ′ , A 2 “ ) are for L 3 edge and the resonance peaks B 1 and B 2 are for L 2 edge. Zhou et al . suggested that transition from 2 p 3/2 and 2 p 1/2 to the final state Ti 3 d 5/2,3/2 are modified by the combined spin‐orbit and crystal filed interactions and forms low energy t 2g and high energy e g orbital.…”

TiO2 nanotube arrays for photocatalysis: Effects of crystallinity, local order, and electronic structure

“…However, the annealed long nanotubes successfully degraded the MO dye, as depicted in Figure 5 The presence of structural defects in the H 2 -and Ar-annealed nanotubes, viz. Ti 3+ species associated with ̈, is further evidenced by the observation of a smaller separation between their O K-edge t 2g and e g peaks when compared with that measured from the O 2 -annealed nanotubes 37,39,40,[47][48][49][50][51][52] . These changes in the defect state of the nanotubes are anticipated to affect the electronic band gap of TiO 2 and thereby influence the visible light absorption capability 53 .…”

Improvement of Ultra Soft X-ray Absorption Spectroscopy and Photoelectron Spectroscopy Beamline for Studies on Related Materials and Cathodes of Lithium Ion Batteries

“…While the contribution of Li 2 CO 3 decreases in bulk sensitive TFY-XAFS spectra of LiNiO 2 rather than surface sensitive TEY-XAFS spectra, a sharp peak at about 62 eV, which was observed in previous ELNES study [12], was not observed in our measurement. Zhou et al also measured both TEY and FY Li K-XAFS of LiCoO 2 [13]. In their study, the main peak at about 62 eV in TEY XAFS spectra shifted to a lower energy in bulk sensitive FY-XAFS.…”