Preparation method of high-purity n-doped tio2 fully mesoporous nanofibers
A nanofiber, high-purity technology, applied in fiber processing, textiles and papermaking, artificial filaments of inorganic raw materials, etc., can solve the problems of low specific surface area, difficult to separate and recycle, poor photocatalytic stability, etc., and achieve simple and reliable operation process control, stable quality, and strong practicability
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Embodiment 1
[0057] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve them in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 1.2g of azodicarboxylate isopropyl ester (foaming agent, DIPA) and 0.5 g urea and continued stirring for 2 hours to obtain a precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature...
Embodiment 2
[0059] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 0.5g of urea and continue to stir for 2 hours to obtain the precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature oven to obtain a solid organic precursor fiber ( Figure 7 ). Final...
Embodiment 3
[0061] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve them in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 1.2g of azodicarboxylate isopropyl ester (foaming agent, DIPA) and continued to stir for 2 hours to obtain the precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature oven to obtai...
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