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Method for fast preparing single crystal tellurium in one dimension Nano structure from powder of fellurium

A nanostructure, single crystal technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of long reaction time, high temperature and high pressure, high cost, etc., and achieve the effect of simple and easy-to-obtain raw materials and mild conditions.

Inactive Publication Date: 2005-08-31
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these methods require high temperature and high pressure or expensive reagents or long reaction time

Method used

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  • Method for fast preparing single crystal tellurium in one dimension Nano structure from powder of fellurium
  • Method for fast preparing single crystal tellurium in one dimension Nano structure from powder of fellurium
  • Method for fast preparing single crystal tellurium in one dimension Nano structure from powder of fellurium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1. Preparation of one-dimensional nanostructure single crystal tellurium

[0016] Add 0.1g of tellurium powder, 1g of NaOH, and 20ml of ethylene glycol into a 100mL round-bottomed flask with a reflux device, heat to boiling with a flame, keep for 2 minutes, cool, and centrifuge the resulting black solid product, and use Distilled water and ethanol were washed several times, and the resulting precipitate was vacuum-dried at room temperature to obtain a black powder of tellurium, 0.094 g, with a yield of 94%. Powder XRD result (see attached figure 1 ) shows that the product is pure hexagonal tellurium. The positions of all peaks matched literature values ​​[Ref: Joint Committee on Powder Diffraction Standards (JCPDS), File No 36-1452.]. No heterogeneous peaks were found, indicating that the purity of the product is relatively high. Photographs by TEM (see attached figure 2 a) It is observed that the tellurium nanocrystals prepared in this way are single cryst...

Embodiment 2

[0017] Example 2. Preparation of one-dimensional nanostructure single crystal tellurium

[0018]Add 0.03g tellurium powder, 2g KOH, and 20 milliliters of ethylene glycol in a 100mL round bottom flask with a reflux device, place this system in a microwave oven (operating frequency 2.45GHz; power is adjusted to 280W) and heat to boiling and Hold for 3 minutes, cool, and the other conditions of preparation are the same as in Example 1, and black powder tellurium is also obtained, 0.028 g, with a yield of 93%. Its powder XRD result and selected area electron diffraction pattern all coincide with the result of embodiment 1, by TEM photo (see attached figure 2 b) It is observed that its crystal form is a single crystal tellurium nanowire or ribbon with a diameter of 40-60 nm and a length of 2-4 μm.

Embodiment 3

[0019] Example 3. Preparation of one-dimensional nanostructure single crystal tellurium

[0020] Change the amount of tellurium powder to 0.05g, the alkali to 2gNaOH, and the solvent to 20ml of glycerin. Put the system in a microwave oven (operating frequency 2.45GHz; power adjusted to 280W) and heat it to 280°C for 3 minutes. Cooling, other conditions of preparation are the same as embodiment 1. Similarly, a one-dimensional nanostructure single crystal tellurium similar to that of Example 1 and Example 2 was also obtained, with a yield of 0.045 g and a yield of 90%. Its powder XRD result and selected area electron diffraction pattern all coincide with the result of embodiment 1, by TEM photo (see attached figure 2 c) It is observed that its crystal form is a single crystal tellurium nanowire or ribbon with a diameter of 20-30 nm and a length of 600-800 nm.

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Abstract

A process for quickly preparing one-dimension monocrystal Te with nano structure from Te powder includes such steps as proportionally adding AgTe powder and Ag alkali to solvent, boiling in the reactor with reflux unit, cooling, centrifugally separating black solid from solution, washing with distilled water and then alcohol, and vacuum drying at ordinary temp to obtain black powder.

Description

1. Technical field [0001] The invention relates to a method for preparing single-crystal Te with one-dimensional nanostructure. 2. Background technology [0002] Nanostructures and nanomaterials (especially one-dimensional nanostructures—rods, wires, ribbons, tubes, etc.) have received extensive attention due to their theoretical and applied importance and attractive prospects [cf.: (a) Patzke, G.R. ; Krumeich, F.; Nesper, R.Angew.Chem., Int.Ed.2002, 41, 2446. (b) Hu, J.; 435. (c) Lieber, C.M. Solid State Commun. 1998, 107, 607. (d) Yang, P.; Wu, Y.; Fan, R. Int. J. Nanosci. 2002, 1, 1.]. One of the main problems in this field is whether one-dimensional nanostructures can be fabricated easily and cheaply. Although solid-state one-dimensional nanostructures can be produced by lithographic techniques [see: Rai-choudhury, P. Handbook of Microlithography, Micromachining, and Microfabrication; SPIE Press, IEEE: NewYork, 1999.] or gas-phase chemical methods [see: (a) Levitt, A....

Claims

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Application Information

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IPC IPC(8): C30B7/06C30B29/02C30B29/60
Inventor 朱俊杰周泊
Owner NANJING UNIV
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