SnO2/TiO2 composite nanofiber photocatalyst and preparation method thereof

A composite nanofiber and photocatalyst technology, which is applied in the field of polymer materials and photocatalysis, can solve the problems of difficult control of process parameters, complex process, and many process parameters, so as to improve photocatalytic activity, optimize preparation process, and simplify process parameters. Effect

Inactive Publication Date: 2012-06-13
JIANGNAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has been reported in the literature to combine the two with the help of electrospinning technology, but the combination of sol-gel technology makes the process more complicated and the process parameters are difficult to control
It is also reported that titanium dioxide nanofibers are prepared by electrospinning technology, and then tin dioxide nanoparticles are deposited on the surface of the titanium dioxide nanofibers obtained by hydrothermal synthesis. This method is also complicated in the process, with many process parameters and difficult to control

Method used

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  • SnO2/TiO2 composite nanofiber photocatalyst and preparation method thereof
  • SnO2/TiO2 composite nanofiber photocatalyst and preparation method thereof
  • SnO2/TiO2 composite nanofiber photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh 1.5g PVP and dissolve in 8.5g DMF, then weigh 1.745g SnCl 4 .5H 2 O into it, then press SnCl 4 .5H 2 O and tetra-n-butyl titanate (TBT) molar ratios of 1:1, 1:3, 1:5, 1:7, 3:1 were added to the above solution with TBT, and stirred with a magnetic stirrer at room temperature for 6 ~8h to complete dissolution to obtain a transparent solution. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 10kV, the distance between the receiving device and the spinneret is 15cm, and the spinning Under the process condition of liquid flow rate of 0.5mL / h, the nanofiber membrane was obtained by spinning for 10h. The obtained nanofibrous membrane was put into a muffle furnace, the temperature was raised from room temperature to 600 °C at a rate of 1 °C / min, calcined for 5 h, and then naturally cooled to room temperature.

Embodiment 2

[0020] Weigh 1.5g PVP and dissolve in 8.5g DMF, then weigh 1.745g SnCl 4 .5H 2 O into it, then press SnCl 4 .5H 2 O and tetra-n-butyl titanate (TBT) molar ratios of 1:1, 1:3, 1:5, 1:7, 3:1 were added to the above solution with TBT, and stirred with a magnetic stirrer at room temperature for 6 ~8h to complete dissolution to obtain a transparent solution. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 15kV, the distance between the receiving device and the spinneret is 20cm, and the spinning Under the process condition of liquid flow rate of 1.0mL / h, the nanofibrous membrane was obtained by spinning for 10h. The obtained nanofibrous membrane was put into a muffle furnace, heated from room temperature to 600 °C at a rate of 2 °C / min, calcined for 3 h, and then naturally cooled to room temperature.

Embodiment 3

[0022] Weigh 1.5g PVP and dissolve in 8.5g DMF, then weigh 1.745g SnCl 4 .5H 2 O into it, then press SnCl 4 .5H 2O and tetra-n-butyl titanate (TBT) molar ratios of 1:1, 1:3, 1:5, 1:7, 3:1 were added to the above solution with TBT, and stirred with a magnetic stirrer at room temperature for 6 ~8h to complete dissolution to obtain a transparent solution. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 20kV, the distance between the receiving device and the spinneret is 25cm, and the spinning Under the process condition of liquid flow rate of 1.5mL / h, the nanofibrous membrane was obtained by spinning for 10h. The obtained nanofibrous membrane was put into a muffle furnace, the temperature was raised from room temperature to 700 °C at a heating rate of 5 °C / min, calcined for 2 h, and then naturally cooled to room temperature.

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Abstract

The invention relates to a SnO2/TiO2 composite nanofiber photocatalyst and a preparation method thereof, and belongs to the technical fields of macromolecular materials and photocatalysis. SnO2/TiO2 composite nanofibers prepared by the method are used as a photocatalytic material, the problem of low separation efficiency of a titanium dioxide photon-generated carrier is solved, and the stability of a photo-generated electron-hole pair is increased, so that the photocatalytic activity of titanium dioxide is improved. According to the method, the composite nanofibers are obtained by directly using an electrostatic spinning technology and through calcination in air, and a sol-gel technology with multiple influencing factors is not introduced. The process of preparing the composite nanofibers is optimized, and the adjustment of process parameters is simplified. The material prepared by the method is used as the photocatalytic material, the photocatalytic activity of the material is far higher than that of pure titanium dioxide, and the requirement and development direction of a new-generation titanium dioxide photocatalytic material are met.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and photocatalysis, in particular to a nanofiber photocatalyst and its preparation method, in particular to a SnO 2 / TiO 2 Composite nanofiber photocatalyst and preparation method thereof. Background technique [0002] Titanium dioxide (TiO 2 ) is an n-type semiconductor. Due to nano TiO 2 Photocatalytic materials have the advantages of non-toxicity, high chemical stability, strong oxidation ability, strong long-term corrosion resistance, and reusability, and are widely used in wastewater treatment, air purification, sterilization, and medicine, especially in the field of photodegradation. In terms of organic pollutants, so in the study of semiconductor nanophotocatalysts, nano-TiO 2 Photocatalytic materials have received increasing attention. But nano TiO 2 As a photocatalyst, there are still two core problems, one is TiO 2 The bandgap width is 3.2eV, which belongs to wide bandg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J35/06
Inventor 乔辉罗乔慧付家鹏魏取福黄锋林蔡以兵李静
Owner JIANGNAN UNIV
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