Hollow copper telluride nanometer crystal and preparation method and application thereof

A nanocrystal and copper telluride technology, which is applied in the field of semiconductor nanocrystal synthesis, can solve problems such as unreported preparation of copper telluride nanocrystals, and achieve the effects of reducing post-processing processes, many regeneration times, and simple preparation.

Inactive Publication Date: 2012-09-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the preparation of copper telluride nanocrystals with hollow structure has not been reported

Method used

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  • Hollow copper telluride nanometer crystal and preparation method and application thereof
  • Hollow copper telluride nanometer crystal and preparation method and application thereof
  • Hollow copper telluride nanometer crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of embodiment 1 elemental copper nanocrystal

[0028] Put 0.5mmol of copper acetylacetonate, 8mL of liquid dodecylamine and 2mL of trioctylphosphine into a three-necked flask and with strong magnetic stirring, the temperature was gradually raised to 250°C under the protection of nitrogen. During this process, the color of the solution From dark green to orange-yellow, and finally a brown-red turbid solution, indicating the formation of copper nanocrystals. Such as figure 1 (a), figure 2 and image 3 Shown are X-ray electron diffraction pictures, transmission electron micrographs and high-resolution transmission electron micrographs of copper nanocrystals, respectively. It can be seen that the average diameter of the nearly spherical copper nanocrystals is about 21 nm, and the size distribution is relatively uniform.

Embodiment 2

[0029] Embodiment 2 configuration concentration is the trioctylphosphine solution of tellurium of 0.1mol / L

[0030] Mix 1 mmol of tellurium powder and 10 mL of trioctylphosphine into a 50 mL three-neck flask, raise the temperature to 200 °C under the protection of nitrogen, keep it for 4 hours, then cool down to room temperature naturally for storage for later use.

Embodiment 3

[0031] Embodiment 3 configuration concentration is the trioctylphosphine solution of tellurium of 0.3mol / L

[0032] Mix 3mmol tellurium powder and 10mL trioctylphosphine into a 50mL three-neck flask, raise the temperature to 220°C under the protection of nitrogen and keep it for 3 hours, then cool down to room temperature naturally for storage for later use.

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Abstract

The invention relates to a hollow copper telluride nanometer crystal and a preparation method and application thereof, belonging to the technical field of semiconductor nanometer crystals and synthesis methods. The preparation method comprises the steps of: firstly placing copper acetylacetonate, dodecylamine and trioctylphosphine in a container for magnetic stirring, and gradually increasing the temperature under the protection of nitrogen till the color of solution is turned to orange from blackish green and finally brownish red turbid solution is formed and indicates that copper nanometer crystals are formed; and injecting tellurium-trioctylphosphine solution prepared in advance into the brownish red turbid solution till the mixed solution becomes black and turbid to form the hollow copper telluride nanometer crystals. By changing the molar ratio or the reaction temperature of the copper acetylacetonate and tellurium, the control over the size of the hollow copper telluride nanometer crystals can be realized and the post-treatment process of a template method can be reduced; and since the prepared samples have small size and large specific surface area, high carbon monoxide gas sensitivity is presented and the hollow copper telluride nanometer crystal has an potential of application to gas-sensitive sensors.

Description

technical field [0001] The invention belongs to the technical field of synthesis methods of semiconductor nanocrystals, in particular to a method for preparing high-quality hollow-structure nanocrystals and research on related gas-sensing properties. Background technique [0002] For a long time, hollow nanostructures have been a hot topic in the field of scientific research. Due to their large specific surface area, relatively small density and good permeability, they are widely used in catalysis, sensors, drug delivery, and energy conversion and storage. Caused widespread concern. Many previous reports have made hollow structures using silicon or polymer particles as templates. Because it is difficult to obtain smaller templates, the hollow structures are generally larger than 200nm. In addition to the size limitation for the template method, the post-processing work to remove the template also increases the complexity of the synthesis process and the opportunity to intro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y40/00G01N27/12
Inventor 邹勃肖冠军邹广田
Owner JILIN UNIV
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