Strontium titanate/titanium dioxide composite nano fibers and preparation method thereof

A technology of composite nanofibers and titanium dioxide, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, spinning solution preparation, etc., can solve problems such as not being able to meet the requirements of photocatalytic activity, and achieve sunlight Improved utilization rate, long life, and improved photocatalytic activity

Inactive Publication Date: 2017-06-20
台州市中元新材料有限公司
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Problems solved by technology

But for how to improve the modified TiO 2 Especially rutile phase TiO 2 In terms of photocatalytic activity as a photocatalyst, it has been reported in the literature that TiO in the rutile phase 2 Combined with CuS to form a het

Method used

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  • Strontium titanate/titanium dioxide composite nano fibers and preparation method thereof
  • Strontium titanate/titanium dioxide composite nano fibers and preparation method thereof
  • Strontium titanate/titanium dioxide composite nano fibers and preparation method thereof

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Embodiment Construction

[0016] A method for preparing strontium titanate / titanium dioxide composite nanofibers, comprising the following steps:

[0017] (1) Disperse 2.2g of polyvinylpyrrolidone (PVP) into a mixed solution composed of 8ml of N,N-dimethylformamide (DMF) and 2ml of glacial acetic acid. After the dispersion is uniform, a uniform and stable transparent solution is obtained; add 2g After tetrabutyl titanate is uniformly dispersed, strontium acetate (5.3mg-ST1, 15.9mg-ST3, 26.5mg-ST5, 53mg-ST10) is added to form a uniform and stable spinning solution.

[0018] (2) Spinning with the spinning solution prepared in step 1, and receiving it through an aluminum foil drum receiver to obtain a fiber precursor; wherein, the diameter of the nozzle is 0.5mm, and the flow rate is 0.6ml / h. The spinning voltage is 15kV, the distance between the needle and the grounded aluminum foil roller receiver is 15cm, and the ambient humidity during the electrospinning process is below 40%;

[0019] (3) The fiber ...

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Abstract

The invention relates to 100-200nm strontium titanate/titanium dioxide (rutile phase) composite nano fibers by means of a one-step electrostatic spinning method. The method is simple and high in operability. The obtained fibers are controllable in dimension, uniform in distribution and good in continuity. Compared with single TiO2 (rutile phase) and single SrTiO3, the photocatalytic activity of the prepared SrTiO3/TiO2 (rutile phase) composite nano fibers is hugely improved and the SrTiO3/TiO2 (rutile phase) composite nano fibers have an important application prospect in photocatalytic degradation of degradation-resistant organic pollutants such as methyl orange, methylene blue and rhodamine B.

Description

technical field [0001] The invention belongs to the field of novel functional materials, in particular to a kind of SrTiO 3 / TiO 2 Composite nanofibers and methods for their preparation. Background technique [0002] With the rapid development of modern industry, a large amount of waste water containing toxic and carcinogenic pollutants is discharged, which seriously threatens human health. Advanced oxidation methods, including electrochemical oxidation, Fenton oxidation, ozone oxidation, photocatalytic oxidation, etc., are particularly effective in the removal of highly stable and highly toxic organic pollutants in water, and have gradually become researched by universities and scientific research institutions at home and abroad. one of the directions. The photocatalytic oxidation method is one of the advanced oxidation technologies. It refers to irradiating the semiconductor photocatalyst so that the electrons on the valence band are excited and then jump to the conduct...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D1/02B01J23/04
CPCB01J23/002B01J23/04B01J35/004B01J35/06D01D1/02D01F9/08
Inventor 赵伟杰张晶李超荣潘佳奇牛剑涛裘剑锋
Owner 台州市中元新材料有限公司
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