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Preparation method of CdS/carbon nano tube/polyacrylonitrile hybrid nano-fiber

A carbon nanotube and polyacrylonitrile technology, applied in the field of nanomaterials, can solve the problems of low bonding strength, easy to fall off, and CdS particles are easy to agglomerate, and achieve the effects of good mechanical properties, inhibition of agglomeration, and easy recycling.

Inactive Publication Date: 2013-01-16
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In order to make full use of these characteristics, CdS / polyacrylonitrile (PAN) hybrid nanofibers have been prepared by combining electrospinning and solution immersion. However, since CdS is introduced into the surface of nanofibers by immersion, on the one hand, The bonding strength between CdS and PAN nanofibers is low, and it is easy to fall off during use. On the other hand, the CdS particles obtained by the soaking method are prone to agglomeration, and the particle size is tens to hundreds of nanometers (Yang et al., Electrospinning of carbon / CdS coaxial nanofibers with photoluminescence and conductive properties, Mater Sci Eng B-Adv., 2007, 140, 48-52)

Method used

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  • Preparation method of CdS/carbon nano tube/polyacrylonitrile hybrid nano-fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of CdS-OH / DMF suspension

[0028] ①Under magnetic stirring, drop 30 mL of DMF solution containing 5 mmol 2-mercaptoethanol (ME) into 3 mL of 2.5 mmol CdCl 2 in the aqueous solution, and stirred for 10 min to obtain A solution.

[0029] ② Add 3 mL of 1.5 mmol Na 2 The aqueous solution of S was added dropwise to the solution of A, at this time, the colorless and transparent solution immediately turned yellow and gradually became turbid. After the mixed solution was reacted at 30° C. for 4 hours, the yellow solution became clear and transparent again, and solution B was obtained.

[0030] ③Transfer the B solution to a rotary evaporator and carry out vacuum distillation at 85°C to remove water and a small part of DMF. After vacuum distillation, the precipitated NaCl was removed by centrifugation to obtain a clear and transparent CdS-OH / DMF suspension with a mass concentration of 1.2%.

[0031] (2) Preparation of electrospinning solution

[0032]①Dissolv...

Embodiment 2

[0039] (1) The preparation of CdS-OH / DMF suspension is the same as in Example 1

[0040] (2) Preparation of electrospinning solution

[0041] ① Dissolve 1.5 g of PAN in 11.0 g of DMF to make a clear solution, then add 0.83 g of acetone and 0.0044 g of cetyltrimethylamine bromide (CTAB) into the solution to make a mass concentration composition of 11% PAN, 6.1% Acetone, 0.03% CTAB in C.

[0042] ② Add 0.008 g of MWCNT to 6.61 g of 1.2% CdS-OH / DMF suspension, magnetically stir for 30 min, and sonicate in an ultrasonic oscillator for 3 hours to make a uniform black suspension D.

[0043] ③ Slowly add the suspension D to the C solution under magnetic stirring, stir for 30 min and then sonicate in an ultrasonic oscillator for 3 hours. 20 g of uniform and stable CdS-OH / MWCNT / PAN spinning solution with a mass concentration composition of 7.5% PAN, 0.4% CdS-OH and 0.04% MWCNT was obtained.

[0044] (3) Preparation of CdS-OH / MWCNT / PAN hybrid nanofibers

[0045] Transfer the CdS-OH / ...

Embodiment 3

[0048] (1) The preparation of CdS-OH / DMF suspension is the same as in Example 1

[0049] (2) Preparation of electrospinning solution

[0050] ① Dissolve 1.5 g of PAN in 11.0 g of DMF to make a clear solution, then add 0.83 g of acetone and 0.0044 g of cetyltrimethylamine bromide (CTAB) into the solution to make a mass concentration composition of 11% PAN, 6.1% Acetone, 0.03% CTAB in C.

[0051] ②Add 0.008 g of single-walled carbon nanotubes (SWCNTs) to 6.65 g of 1.2% CdS-OH / DMF suspension, magnetically stir for 30 min, and ultrasonicate for 3 hours in an ultrasonic oscillator to make a uniform black suspension D.

[0052] ③ Slowly add the suspension D to the C solution under magnetic stirring, stir for 30 min and then sonicate in an ultrasonic oscillator for 3 hours. 20 g of uniform and stable CdS-OH / SWCNT / PAN spinning solution with a mass concentration of 7.5% PAN, 0.4% CdS-OH and 0.04% MWCNT was obtained.

[0053] (3) Preparation of CdS-OH / SWCNT / PAN hybrid nanofibers

...

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Abstract

The invention relates to a preparation method of CdS / carbon nano tube / polyacrylonitrile hybrid nano-fiber. The technical scheme is as follows: the preparation method comprises the following steps: by taking CdCl2, Na2S and 2-mercaptoethanol as raw materials, and N,N-dimethylformamide (DMF) and water as solvents, synthesizing CdS-OH / DMF suspension; uniformly dispersing the carbon nano tube (CNT) in the CdS-OH / DMF suspension through ultrasonic, slowly stirring CNT / Cds-OH / DMF suspension into the prepared polyacrylonitrile / DMF solution, stirring and ultrasonically treating to obtain mixed spinning liquid; and obtaining the hybrid nano-fiber by adopting an electrostatic spinning technology. According to the invention, a solution growth method and the electrostatic spinning method are combined, the process is simple, and the prepared hybrid nano-fiber has the characteristics of large specific surface area and good mechanical property. Meanwhile, the preparation method has efficient performance of photocatalytic degradation of organic dye, and the hybrid nano-fiber is easier to recycle than a powdery photocatalytic material.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a preparation method of CdS-OH / carbon nanotube / polyacrylonitrile hybrid nanofiber. The hybrid nanofiber material can be used for photocatalytic materials. Background technique [0002] Cadmium sulfide (CdS) nanoparticles are a very important II-VI semiconductor material with a band gap energy of 2.42eV at room temperature. CdS has nonlinear optical properties, fluorescence properties and quantum size effect, so it has been widely studied by researchers. CdS nanoparticles have a large specific surface area and are prone to agglomeration. In order to avoid the occurrence of agglomeration, how to use stabilizers to control the morphology of nanoparticles has become an important research topic and a realistic problem that needs to be solved urgently in practical applications. One of the very simple and mild synthetic methods is to use 2-mercaptoethanol (ME) as an organic ligand ...

Claims

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Application Information

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IPC IPC(8): D01F6/54D01F1/10D01D5/00B01J31/26
Inventor 刘海清王巧英
Owner FUJIAN NORMAL UNIV
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