A preparation method of tungsten trioxide nanofibers with core-shell structure
A technology of tungsten trioxide and nanofibers, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor controllability and inability to coat fibers uniformly , to achieve large aspect ratio, improve photocatalytic degradation performance, and low spinning cost
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Embodiment 1
[0039] Dissolve 2.5g of commercially available hydrated ammonium metatungstate in 5ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1,300,000, and add 1g, and stir until the solution is uniform and transparent to obtain a precursor solution; then pass a single Shaft electrospinning method, voltage 15KV, receiving distance 12cm, advancing speed 0.01ml / min, to obtain white cloth-like as-spun fibers; put the as-spun fibers in a muffle furnace for calcination at 550°C, heating rate 5°C / min, keep warm After 30 minutes, it was naturally cooled to room temperature to obtain tungsten oxide nanofibers with a core-shell structure.
[0040] The preparation process is as figure 1 As shown, the prepared core-shell structure tungsten oxide nanofiber structure is as follows figure 2 shown, from figure 2 It can be seen that the nanofiber has a core-shell structure, smooth surface, uniform diameter distribution, and large aspect ratio.
Embodiment 2
[0042] Dissolve 2.0g of hydrated ammonium metatungstate in 5ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1300000, and add 1g, stir until the solution is uniform and transparent to obtain a precursor solution; then through uniaxial electrospinning Silk method, voltage 15KV, receiving distance 12cm, advancing speed 0.01ml / min, to obtain as-spun fibers; put the as-spun fibers in a muffle furnace for calcination at 500°C, heat up at 4°C / min, keep warm for 30min, and cool naturally to room temperature , to obtain tungsten oxide nanofibers with smooth core-shell structure.
Embodiment 3
[0044] Dissolve 2.0g of hydrated ammonium metatungstate in 5ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1300000, and add 1g, stir until the solution is uniform and transparent to obtain a precursor solution; then through uniaxial electrospinning Silk method, voltage 15KV, receiving distance 12cm, propulsion speed 0.05ml / min, to obtain as-spun fibers; put the as-spun fibers in a muffle furnace for calcination at 550°C, heat up at 5°C / min, keep warm for 30min, and cool naturally to room temperature , to obtain tungsten oxide nanofibers with smooth core-shell structure.
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