Sprayed vanadium pentoxide thin films: Influence of substrate temperature and role of HNO3 on the structural, optical, morphological and electrical properties

Binary vanadium pentoxide carbon-graphene foam composites derived from dark red hibiscus sabdariffa for advanced asymmetric supercapacitor

“…The FTIR analysis presents the characteristic vibrational modes situated at 999.3-1006.5 cm −1 and 732.3-747.1 cm −1 which are associated with the stretching modes of V-O-V and V=O, respectively. These vibrational modes of V-O-V and V=O agree with the FTIR of the orthorhombic V 2 O 5 [81,82]. Figure 2b presents the other three transmittance peaks located at 1257.6-1260.1 cm −1 , 1420.2 cm −1 -1425.2 cm −1 and 1602.0 cm −1 -1606.0 cm −1 .…”

Recent advances in vanadium pentoxide (V2O5) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

“…(iii) Solution method. Solution methods, including WCR, 35 hydrothermal, 47 CBD, 124 sol-gel, 30 ECAD, 125 ESS, 126 ED, 67 TP, 127 SP, 128 and ESP, 36,129,130 are used widely to synthesize nanostructures. Among these solution methods, WCR and hydrothermal methods are used widely because of the simple processing and low cost.…”

“…Similarly, optical recombination shows different PL peak positions, number of peaks, and broad emission, which are distributed over wide ranges. The differences between the PL peaks, including one peak, 116,172,173 two peaks, 98,118,174 three peaks, 175 many peaks, 128,171 and a broad peak, 39,105,116,176,177 have been observed.…”

“…Calculation using the Perdew-Burke-Ernzerhof function results in an E opt of 2.325 eV. 164 The lower or higher E opt values, such as from 1.6-2.2 eV, 118,128,[165][166][167][168] 2.6-3.0 eV, 98,169,170 and 3.0-3.49 eV 165,171 were reported. Similarly, optical recombination shows different PL peak positions, number of peaks, and broad emission, which are distributed over wide ranges.…”

Heterostructure of vanadium pentoxide and mesoporous SBA-15 derived from natural halloysite for highly efficient photocatalytic oxidative desulphurisation

“…59 The PL peak observed at 486 nm is due to band transition. 60 The emission peak observed at 460 nm is due to the recombination of the electron-hole pair from the V 3d split-off conduction band to the top of the O 2p valence band. 59,61 The enhanced PL intensity observed in the samples with more V 2 O 5 loaded is due to the contribution of excess electrons from defects and transfers between V 2 O 5 and carriers, which can ll a part of the conduction band or the split-off band.…”