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One-dimensional ZnS (zinc sulfide)/CdS-C nanocomposite material and preparation method thereof

A nanocomposite material, cds-c technology, applied in the field of one-dimensional ZnS/CdS-C nanocomposite system nanomaterials and its preparation, can solve the problems of large-scale use of ZnS photocatalyst, low utilization rate of visible light, electron and space Holes are easy to recombine and other problems, to achieve the effect of improving photocatalytic efficiency, high stability and adsorption capacity, and avoiding secondary pollution

Active Publication Date: 2016-08-24
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZnS is a wide-bandgap semiconductor material, which can only absorb about 4% of the solar energy, and the utilization rate of visible light is very low. Problems such as recycling also greatly limit the large-scale use of ZnS photocatalysts

Method used

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  • One-dimensional ZnS (zinc sulfide)/CdS-C nanocomposite material and preparation method thereof
  • One-dimensional ZnS (zinc sulfide)/CdS-C nanocomposite material and preparation method thereof
  • One-dimensional ZnS (zinc sulfide)/CdS-C nanocomposite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Weigh 17.85g Zn(NO3 ) 2 ·6H 2 0 and 17.292g of sodium benzoate were dissolved in 150mL deionized water respectively at room temperature to prepare a salt solution, and the prepared two kinds of salt solutions were poured into a four-necked flask, and started to rotate at a constant speed with an electric stirrer to make the salt solution mix evenly ;

[0029] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to prepare lye, slowly add lye dropwise to the mixed salt solution, and white precipitates will appear in the solution, adjust the pH of the solution to 5.7, raise the temperature to 80°C, and React at this temperature for 24 hours. After the reaction, the precipitate is taken out, centrifuged, washed 4 times with deionized water, and the product is dried at 50°C for 6 hours to obtain a one-dimensional benzoate-intercalated layered zinc hydroxide nano Fibrous precursors.

[0030] 3) Place the benzoate intercalated layered zinc hydroxide nanofiber precu...

Embodiment 2

[0040] 1) Weigh 17.85g Zn(NO 3 ) 2 ·6H 2 0 and 17.292g of sodium benzoate were dissolved in 150mL deionized water respectively at room temperature to prepare a salt solution, and the prepared two kinds of salt solutions were poured into a four-necked flask, and started to rotate at a constant speed with an electric stirrer to make the salt solution mix evenly ;

[0041] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to prepare lye, slowly add lye dropwise to the mixed salt solution, and white precipitates will appear in the solution, adjust the pH of the solution to 5.7, raise the temperature to 80°C, and React at this temperature for 24 hours. After the reaction, the precipitate is taken out, centrifuged, washed 4 times with deionized water, and the product is dried at 50°C for 6 hours to obtain a one-dimensional benzoate-intercalated layered zinc hydroxide nano Fibrous precursors.

[0042] 3) Place the benzoate intercalated layered zinc hydroxide nanofiber pre...

Embodiment 3

[0047] 1) Weigh 17.85g Zn(NO 3 ) 2 ·6H 2 0 and 17.292g of sodium benzoate were dissolved in 150mL deionized water respectively at room temperature to prepare a salt solution, and the prepared two kinds of salt solutions were poured into a four-necked flask, and started to rotate at a constant speed with an electric stirrer to make the salt solution mix evenly ;

[0048] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to prepare lye, slowly add lye dropwise to the mixed salt solution, and white precipitates will appear in the solution, adjust the pH of the solution to 5.7, raise the temperature to 80°C, and React at this temperature for 24 hours. After the reaction, the precipitate is taken out, centrifuged, washed 4 times with deionized water, and the product is dried at 50°C for 6 hours to obtain a one-dimensional benzoate-intercalated layered zinc hydroxide nano Fibrous precursors.

[0049] 3) Place the benzoate intercalated layered zinc hydroxide nanofiber pre...

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Abstract

The invention belongs to the technical field of semiconductor nanocomposite materials, and particularly relates to a one-dimensional ZnS (zinc sulfide) / CdS-C nanocomposite material and a preparation method thereof. Zinc salt and benzoate are used as raw materials for preparing a one-dimensional lamellar metal hydroxide precursor of a benzoate anion intercalation layer; then, the one-dimensional lamellar metal hydroxide precursor and hydrogen sulfide gas take a gas solid reaction, so that zinc hydroxide is converted into ZnS; then, cation exchange with cadmium salt is performed to obtain the nanocomposite material with ZnS and CdS which are uniformly dispersed in a one-dimensional ordered arrangement benzoic acid substrate; then, the nanocomposite material is roasted at high temperature in protection gas environment; the one-dimensional ZnS / CdS-C nanocomposite material can be obtained. The method has the advantages that a template agent and a structure auxiliary are not needed; sulfuretted hydrogen is used as a sulfur source; in-situ pyrolysis is performed to obtain the one-dimensional ZnS / CdS-C nanocomposite material which has high activity, high dispersibility, high crystallinity degree, high purity and high stability and can respond to visible light. Compared with the prior art, the synthesis method provided by the invention has the advantages that the preparation process is simple; the cost is low; the energy consumption is little; controllable preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanocomposite materials, and in particular relates to a one-dimensional ZnS / CdS-C nanocomposite system nanomaterial and a preparation method thereof. Background technique [0002] Since the 1970s, the global shortage of resources and environmental pollution have attracted people's attention. The development and utilization of new energy and the treatment of environmental pollution have become two very important issues that today's society needs to face. In recent years, many new technologies have been used to develop new energy sources and control environmental pollution. Among them, semiconductor photocatalysis technology that utilizes clean, pollution-free and abundant solar energy has received great attention. [0003] ZnS is one of the earliest discovered semiconductor materials and has been widely used in light-emitting diodes, lasers, infrared windows, photocatalysis and sensors due to...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J37/30B01J37/08C02F1/30C02F101/30
CPCC02F1/30B01J27/04B01J37/084B01J37/30C02F2101/30C02F2305/10B01J35/39
Inventor 王连英魏博文王东阳刘改利
Owner BEIJING UNIV OF CHEM TECH
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