Structural Modification of Sol-Gel Synthesized V₂O₅and TiO₂Thin Films with/without Erbium Doping

Abstract

Comparative work of with/without erbium- (Er-) doped vanadium pentoxide (V2O5) and titanium dioxide (TiO2) thin films were carried out via sol-gel technique by dissolving erbium (III) nitrate pentahydrate (Er(NO3)3·5H2O) in vanadium (V) oxoisopropoxide (OV[OCH(CH3)2]3) and titanium (IV) isopropoxide (Ti[OCH(CH3)2]4). Effect of Er doping was traced by Fourier transform IR (FTIR), thermogravimetric/differential thermal (TG/DTA), and photoluminescence measurements. UV-Vis transmission/absorption measurement indicated a blue shift upon Er doping in V2O5film due to the softening of V=O bond while appearance of typical absorption peaks in Er-doped TiO2film. Granule size of the films increased (reduced) upon Er substitution on host material compared to undoped V2O5and TiO2films, respectively.

Er‐doped titanium dioxide/silicon dioxide fibres with enhanced photodegradation performance

“…5, characteristic peaks at ∼3345 and 1654 cm −1 can be assigned to the –OH group and the H–O–H stretching and bending vibrations of the adsorbed water molecules. The characteristic peaks at 1654 and 3345 cm −1 can hardly be detected for the Er@TS nanofibres after calcination [17]. Moreover, the peak at 2870 cm −1 originates from the stretching vibration of the C–H bond of PVP and KH‐560, and peaks from 1500 to 1375 cm −1 can be assigned to the –C–H and –C = C– bands of PVP and KH‐560.…”

Electrochemical and Photoelectrochemical Properties of Nickel Oxide (NiO) With Nanostructured Morphology for Photoconversion Applications

“…This is equivalent to say that SC-TMOs can alter the oxidation state(s) of the constituting metal centers and oxygen atoms by means of redox processes that are electrochemically driven (Hagfeldt et al, 1994; Boschloo and Hagfeldt, 2001; Awais et al, 2013b; Marrani et al, 2014). Electroactivity thus represents an intrinsic property of SC-TMOs, which implies the imparting of charge storage properties in these systems (Estrada et al, 1988; Passerini et al, 1990; Decker et al, 1992; Passerini and Scrosati, 1992; Kitao et al, 1994; Talledo et al, 1994; Gökdemir et al, 2014; Lykissa et al, 2014; Wen et al, 2014). The TMOs electroactivity is granted in those oxides in which the metal atom can present more than one stable redox state (Passerini and Scrosati, 1994; Bellakhal and Draou, 1997; Grugeon et al, 2001; Dong et al, 2003; Sudant et al, 2004; Wang et al, 2005; Mjejri et al, 2014; Vernardou et al, 2014) but it does not arise from nanostructured morphology (Sun and Tolbert, 2004; Centi and Perathoner, 2009; Poppe et al, 2014).…”

Preparation of erbium ion-doped TiO2films and the study of their photocatalytic activity under simulated solar light

“…The presence of erbium in the catalyst inhibited the growth of the TiO 2 crystals. Borlaf et al [17] have reported that erbium can occupy the interstitial positions of the anatase lattice, forming Er-O-Ti bonds that block the growth of the crystal. Fig.…”

“…Wang and co-workers prepared TiO 2 nanofibrous films via electrospinning with variable amounts of erbium for degradation of methylene blue [16] . Lee et al studied the effect of Er doping on the optical band gap energy of TiO 2 thin films prepared by spin coating [17] . Orhanözdemir et al prepared erbium-doped titanium dioxide thin films via dip coating and studied the effects of Er substitution on the microstructure of TiO 2 [18] .…”