Research Article
Crystallizing Vanadium Pentoxide Nanostructures in the Solid-State Using Modified Block Copolymer and Chitosan Complexes
Table 3
Optical transition energy for V2O5 from several morphologies and preparation methods.
| Form | Band gap (eV) | Method | Comments | Reference |
| Macroplates | 3.4 | V2O5 in a water/ethanol media | Macroplates of 10-11 μ length by 5-6 μ |
[19] | Nanosheets | 2.25 | Surfactant sol-gel | Crystal size 52 nm | [91] | Nanoribbon | 2.3 | Magnetron sputtering | Thin thickness 34–70 nm | [1] | Nanoparticles | 2.85 | VOCl3/PEG | Particle size 25–30 nm | [79] | Nanoparticles | 2.93 | NH4VO3/microemulsion | Particle size 5–8 nm | [92] | Flower-like | 2.3 | Hydrothermal | — | [70] | Nanorods | 2.30–2.60 | Magnetron sputtering | Annealed at 500°C | [68] | Film | 2.51–2.53 | Pulsed laser deposited | Thin thickness 28–22 nm | [71, 93] | Film | 2.21–2.22 | Magnetron sputtering | Thin thickness 35–70 nm | [94] | Film | 2.12–2.47 | Pulsed laser deposition | Thin thickness 300 nm | [67] | Film | 2.42–2.49 | Sol-gel | Thin thickness 0.22–0.34 nm | [69] | Film | 2.50–2.66 | Evaporation | Thin thickness 17 nm | [70] | Film | 1.50–3.00 | Plasma, CVD | Thin thickness 75–138 nm | [71] | Film | 2.30–2.50 | Spray pyrolysis | Thin thickness 30–55 nm | [72] | Film | 2.29–2.34 | Physical VD | Thin thickness 45, 74, and 164 nm | [73] | Film | 2.24 | Sputtering | V2O5 target on SnO2: Thin thickness 35–160 nm | [74] | Film | 2.2 | Thermally evaporated | Thin thickness 50–215 nm | [75] | Film | 2.03–2.62 | Thermal evaporation and Annealing at 350°C | Lithium intercalation | [76] | Film | 2.25–2.37 | RF sputtering | Target in O2 | [77] | Layered nanosheets(a) | 2.34 | Solid-state pyrolysis | | This work | Layered nanosheets(b) | 2.4 | Solid-state pyrolysis | | Larger crystals with layered structure(c) | 2.4 | Solid-state pyrolysis | | nanoparticles(d) | 2.34 | Solid-state pyrolysis | Average size 16 nm |
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Product from precursor PS-co-4-PVP·(VCl3) 1 : 1. (b)Product from precursor chitosan·(VCl3) 1 : 1. (c)Product from precursor PS-co-4-PVP·(VCl3) 1 : 5. (d)Product from precursor chitosan·(VCl3) 1 : 5.
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