Chimie douce and phase transitions

Electronic structure of CuWO4: XPS, XES and NEXAFS studies

“…As shown very recently in Ref. [15], this was true in the case of formation of a new hexagonal WO 2.8 phase with the structure of UO 3 -type during reduction of h-WO 3 .…”

“…In the structure of h-WO 3 , every six [W−O 6 ] octahedra linked by corner sharing form hexagonal channels oriented along the c-axis [1][2][3] and the channels were found to be a very prospective intercalation host of lithium for obtaining Li x WO 3 bronzes, a remarkable cathode material of rechargeable lithium batteries [4,5]. Therefore, a number of alternative routes for synthesis of h-WO 3 were developed since the beginning of 1980s. A review of the alternative routes (using as precursors the WO 3 ·xH 2 O (x = 0.8−1.1), (NH 4 ) 0.30 ·WO 3 , (NH 4 ) 10 4 OH) x ·WO 3 substances) was made comparatively recently by Han et al [6].…”

Highly-crystalline ultrathin gadolinium doped and carbon-coated Li4Ti5O12 nanosheets for enhanced lithium storage

“…3f shows the representative SAED pattern taken from an individual sheet suggesting high crystallinity. However, in the irregular and deformed LTO nanosheets, it is rather difficult to observe a definite and reproducible orientation relationship for the H-LTO by SAED as previously observed from other topotactic transformation systems [55]. As shown in Fig.…”

Acetate intercalated Mg–Al layered double hydroxides (LDHs) through modified amide hydrolysis: a new route to synthesize novel mixed metal oxides (MMOs) for CO2capture

“…MMOs have retained the mixed morphology even after thermal decomposition, which indicates the topotactic conversion from precursor LDHs to resultant MMOs. 54 The mixed morphology involving fibrous crystallites could influence the properties of the resultant MMOs, which in turn could show different CO 2 capture performance.…”