Preparation method of titanium dioxide based composite nanofiber photocatalytic material
A technology of composite nanofibers and photocatalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as hindering industrial application process, low sunlight utilization rate, and poor photon quantum efficiency , to achieve the effect of controllable structure, broad market prospect and no secondary pollution
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[0024] TiO 2 Preparation of nanofibers
[0025] Dissolve 1.0g of PVP in 10mL of absolute ethanol, and magnetically stir for 4h to obtain solution A; 1.5mL of n-butyl titanate (Ti(OBu) 4 ) was slowly added dropwise to the mixed solution of 3mL absolute ethanol and 3mL glacial acetic acid under stirring, and continued to stir for 30min to obtain solution B; at room temperature, slowly added solution B dropwise to solution A, and vigorously stirred for 2h to obtain PVP / Ti(OBu) 4 Sol.
[0026] Preparation of TiO using a commercially available electrospinning device 2 For nanofibers, the electrospinning device mainly consists of three parts: electrostatic high-voltage power supply, liquid supply device, and fiber collection device. Put an appropriate amount of PVP / Ti(OBu) 4 The sol is injected into the liquid supply device (syringe), and the metal electrode is inserted into the front capillary. Adjust the syringe tilt angle to approximately 45° from the horizontal. The dist...
Embodiment 1
[0029] CaTiO 3 / TiO 2 Preparation of composite nanofibers: weigh 0.023g Ca(NO 3 )2.4H 2 O dissolved in 20mL ethylene glycol and water (V 乙二醇 :V 水 =1:4) in the mixed solution, after it was completely dissolved, KOH solution was added dropwise to adjust the pH of the reaction solution to pH 11. Transfer to a 25mL polytetrafluoroethylene reactor, and then add 0.01gTiO 2 The fibers are sealed and placed in an oven for 24 hours at 180°C. Naturally cooled to room temperature, washed several times with distilled water and absolute ethanol, and dried in an oven at 60 °C for 10 h to obtain CaTiO 3 / TiO 2 Composite nanofiber photocatalytic materials.
[0030] Such as figure 2 Shown is the CaTiO that this embodiment makes 3 / TiO 2 The scanning electron microscope image of the composite nanofiber photocatalytic material, it can be clearly seen from the image that the sample still maintains the original fiber shape, but the surface is no longer smooth, and there are many CaTiO3...
Embodiment 2
[0032] BaTiO 3 / TiO 2 Preparation of composite nanofibers: weigh 0.026g Ba(NO 3 ) 2 Dissolve in 20mL ethylene glycol and water (V 乙二醇 :V 水 =1:5) in the mixed solution, after it was completely dissolved, sodium hydroxide solution was added dropwise to adjust the pH of the reaction solution to pH 11. Transfer to a 25mL polytetrafluoroethylene reactor, and then add 0.01gTiO 2 The fibers are sealed and then heated in an oven at 180°C for 12 hours. Naturally cooled to room temperature, washed several times with absolute ethanol and distilled water, and dried in an oven at 60 °C for 10 h to obtain BaTiO 3 / TiO 2 Composite nanofiber photocatalytic materials.
[0033] Such as image 3 Shown is the BaTiO that this embodiment makes 3 / TiO 2 The scanning electron microscope image of the composite nanofiber photocatalytic material, it can be clearly seen from the image that the sample still maintains the original fiber shape, but the surface is no longer smooth, and there are m...
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