Method for preparing CdS or CdSe nano-tube with KCdCl3 nanowire as template

A technology of nanowires and nanotubes, which is applied in the field of nanomaterial preparation, can solve the problems of not having a layered crystal structure, difficulty in preparing dimensional nanotubes, etc., and achieve the effect of cheap raw materials, high yield and simple process

Inactive Publication Date: 2009-07-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

Normally, cadmium chalcogenides do not have a layered crystal structure, so it is difficult to prepare one-dimensional nanotubes by conventional chemical synthesis methods

Method used

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  • Method for preparing CdS or CdSe nano-tube with KCdCl3 nanowire as template
  • Method for preparing CdS or CdSe nano-tube with KCdCl3 nanowire as template
  • Method for preparing CdS or CdSe nano-tube with KCdCl3 nanowire as template

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Experimental program
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Effect test

Embodiment 1

[0024] Under magnetic stirring at room temperature, dissolve 0.456g of cadmium chloride and 0.042g of potassium iodide in 3mL of deionized water, add this solution into 30mL of absolute ethanol, and immediately generate a white product, continue to stir for 20 minutes to make the reaction complete, and centrifuge After the nanowire product was separated and collected by the method, it was washed with absolute ethanol and dried in vacuum at 60°C. X-ray diffraction pattern and transmission electron microscope photo show that the product is KCdCl 3 Nanowires( figure 2 , image 3 ). KCdCl 3 The nanowires were dispersed in 20 mL of absolute ethanol. Prepare a sulfur source solution containing 0.096 g of sodium sulfide and 5 mL of absolute ethanol. The precursor solution and the sulfur source solution were mixed and reacted at room temperature for 30 minutes to obtain a yellow product. The product was separated by centrifugation, and the separated product was washed three tim...

Embodiment 2

[0026] At room temperature, the precursor KCdCl was prepared according to Example 1 3 nanowires and dispersed them in 20 mL of absolute ethanol. Prepare a serving containing 0.031g Se powder, 0.060g NaBH 4 and 5 mL of selenium source solution in absolute ethanol. The precursor solution and the selenium source solution were mixed and reacted for 30 minutes to obtain a black product. The product was separated by centrifugation, and the separated product was washed three times with absolute ethanol and deionized water respectively, and dried under vacuum at 60°C. X-ray diffraction figure and transmission electron microscope photo illustrate that this black product is the cadmium selenide nanotube ( Figure 5 , Image 6 b).

Embodiment 3

[0028] At room temperature, the precursor KCdCl was prepared according to Example 1 3 nanowires, and the KCdCl 3 The nanowires were dispersed in 20 mL of absolute ethanol. Prepare a sulfur source solution containing 0.24 g of sodium sulfide and 5 mL of absolute ethanol. The precursor solution and the sulfur source solution were mixed and reacted at room temperature for 30 minutes to obtain a yellow product. The product was separated by centrifugation, and the separated product was washed three times with absolute ethanol and deionized water respectively, and vacuum-dried at 60° C. to obtain cadmium sulfide nanotubes.

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Abstract

The invention relates to a method for preparing a CdS or CdSe nanotube by using a KCdCl3 nano wire as a template, and belongs to the field of nano material preparation. The method comprises the following steps: using ethanol and little water as a reaction solvent, using water-soluble cadmium chloride and potassium iodide as raw materials, and preparing a precursor of the KCdCl3 nano wire with water-solubility and reactivity at room temperature; collecting the precursor nano wire, dispersing the precursor nano wire into the ethanol, and adding a sulfur source or a selenium source into the ethanol so that the sulfur source or the selenium source has anion replacement reaction on the surface of the nano wire to generate CdS or CdSe nano crystals to be assembled on the surface of the precursor nano wire to form a tube wall, while the precursor nano wire has formation reaction in the nanotube and simultaneously is continuously consumed so as to form the polycrystalline nanotube assembled by the CdS or CdSe nano crystals. The method has the characteristics of simple process, cheap raw materials, room temperature preparation, low cost, controllable shape and dimension, and the like.

Description

technical field [0001] The present invention relates to KCdCl 3 The preparation method of CdS and CdSe nanotubes prepared by nanowires as templates, more precisely, provides a water-soluble and reactive KCdCl 3 The nanowire and its method for preparing CdS and CdSe nanotubes as a precursor and a template belong to the field of nanomaterial preparation. Background technique [0002] Cadmium chalcogenides (CdS and CdSe) are important typical semiconductor materials in II-VI groups, with unique photoelectric properties, and have broad applications in the fields of catalysis, optoelectronic devices, solar energy conversion, nonlinear optics, communications, etc. prospect. Since the discovery of carbon nanotubes in 1991, one-dimensional nanomaterials (nanorods, nanowires, and nanotubes) have received extensive attention in the field of materials science because of their unique physical and chemical properties and attractive application prospects. In recent years, many methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04C01G11/02
Inventor 朱英杰仝华刘小林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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