Porous Cu7S4/Cu (OH)2 composite nanofiber material and preparation method thereof

A technology for composite nanofibers and composite materials, which is applied in the field of preparation of inorganic nanomaterials, can solve the problems of difficulty in preparation and production, time-consuming and energy-consuming, process difficulties, etc., and achieves the effects of low cost, simple production process and good repeatability.

Active Publication Date: 2020-02-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these synthetic techniques are difficult, the process is very complicated, and time-consuming and energy-consuming, and it is very difficult to prepare and produce a large number of

Method used

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  • Porous Cu7S4/Cu (OH)2 composite nanofiber material and preparation method thereof
  • Porous Cu7S4/Cu (OH)2 composite nanofiber material and preparation method thereof
  • Porous Cu7S4/Cu (OH)2 composite nanofiber material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Step 1. Mix 92ml deionized water and 8ml ethylene glycol and stir thoroughly. Weigh 2.131g of copper chloride dihydrate and 0.1625g of thiourea into 50ml of the above-mentioned mixed solution, and stir thoroughly to obtain a solution of 0.25mol / L copper chloride and 0.043mol / L thiourea.

[0021] Step 2, the thiourea solution is directly poured into the stirring cupric chloride solution. White flocs appeared in the solution immediately. After standing at room temperature for 24 hours, the white floc product was filtered, washed with deionized water, and dried at 50°C.

[0022] Step 3, soak the product obtained in step 2 in 2mol / L KOH strong alkali solution for 10 minutes to obtain black Cu 7 S 4 / Cu(OH) 2 . electron microscope ( figure 1 ) shows that it is a nanoporous fiber with a diameter of 79nm. figure 2 For the prepared Cu 7 S 4 / Cu(OH) 2 The composite nanofiber transmission electron microscope photo shows its porous structure; the measured specific surfa...

Embodiment 2

[0024] Step 1. Mix 150ml deionized water and 30ml ethylene glycol and stir well. Weigh 2.131g of copper chloride dihydrate and 0.32g of thiourea into 90ml of the above-mentioned mixed solution, and stir thoroughly to obtain a solution of 0.14mol / L copper chloride and 0.047mol / L thiourea.

[0025] Step 2, the thiourea solution is directly poured into the stirring cupric chloride solution. White flocs appeared in the solution immediately. Stand at room temperature for 10 hours, filter the white floc product, wash with deionized water, and dry at 40°C.

[0026] Step 3, soak the product obtained in step 2 in a 6mol / L KOH strong alkali solution for 10 minutes to obtain Cu 7 S 4 / Cu(OH) 2. Under the electron microscope, it can be seen as a nanoporous fiber with a diameter of 82nm, and the XRD measurement results show that it is Cu 7 S 4 and Cu(OH) 2 Nanocrystalline composition. Its specific surface area is 132.8m 2 / g, the pore volume is 0.257cm 3 / g.

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Abstract

The invention belongs to the technical field of inorganic nano material preparation, and particularly relates to a porous Cu7S4/Cu (OH)2 composite nanofiber material and a preparation method thereof.The preparation method includes: adopting a water solution of copper chloride dihydrate and thiourea in ethylene glycol to generate [Cu(tu)] Cl.1/2H2O at normal temperature and at pressure; converting[Cu(tu)] Cl.1/2H2O in a strong alkali solution into the porous Cu7S4/Cu(OH)2 composite nanofiber material. The composite nanofiber material is of a nanofiber structure composed of Cu7S4 and Cu(OH)2 nano crystals in uniform distribution, a ratio of Cu7S4 to Cu(OH)2 is 1:2-2:1, and fiber diameter is 75-85nm; the composite nanofiber material has mesopores, pore size distribution is 2-25nm, pore sizeof 70-85% of the mesopores is 5-7nm, pore volume exceeds 0.2cm3/g, and surface specific area exceeds 100m2/g. the composite nanofiber material is suitable for the field of solar cells, secondary cells, supercapacitors, LEDs, air-sensitive sensors, photoelectric conversion switches, thermocouples, optical coupling, light filters, fluorescent materials and superconductors.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanomaterials, in particular to a porous Cu 7 S 4 / Cu(OH) 2 Composite nanofibrous material and its preparation method. Background technique [0002] Copper-based oxides (Cu x O), hydroxide (Cu(OH) 2 ) and sulfide (Cu x S) Nanomaterials have a wide range of applications in solar cells, secondary batteries, supercapacitors, light-emitting diodes, gas sensors, photoelectric switches, thermocouples, optical records, filters, fluorescent materials, and superconductors. In particular, copper-based nanocomposites have been found to have specific catalytic capabilities, photoelectric properties, high electrical conductivity, and excellent battery and capacitance properties in recent years. For example, lotus-shaped CuO / Cu(OH) 2 [Y.-K.Hsu, Y.-C.Chen, Y.-G.Lin, Characteristics and electrochemical performances of lotus-like CuO / Cu(OH) 2 hybrid material electrodes, Journal of Electroa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18
CPCD01F8/18
Inventor 李志杰孙梦璇方齐圣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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