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Method for synthesis of tellurium elementary substance with grading structure

A technology of hierarchical structure and synthesis method, applied in the direction of element selenium/tellurium, nanotechnology for materials and surface science, nanotechnology, etc. control synthesis and other problems, to achieve the effects of uniform morphology, short reaction time and low reaction temperature

Inactive Publication Date: 2015-04-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the existing technology is difficult to realize the controllable synthesis of tellurium simple substance with single crystal nanosphere / polycrystalline nanotube hierarchical structure, and provides a synthesis method of tellurium simple substance with hierarchical structure

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  • Method for synthesis of tellurium elementary substance with grading structure
  • Method for synthesis of tellurium elementary substance with grading structure
  • Method for synthesis of tellurium elementary substance with grading structure

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Experimental program
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specific Embodiment approach 1

[0017] Specific embodiment 1: This embodiment has a synthetic method of tellurium element with hierarchical structure, which is specifically carried out according to the following steps:

[0018] 1. Take 45mL of formamide in a 50mL glass three-necked bottle, then add 0.5-1mmol of sodium tellurite and 0.1-0.5g of trisodium citrate, stir evenly with a magnetic force, and then put it into an atmospheric pressure microwave synthesizer. The temperature is 195-205°C, and the power is 200-300W under the conditions of reaction for 20-40 minutes to obtain the product;

[0019] 2. Wash the product obtained in step 1 with deionized water for 2 to 3 times, and with absolute ethanol for 1 to 2 times, and dry at 60° C. to complete the synthesis of tellurium with a hierarchical structure.

[0020] The raw materials used in this embodiment are commercially available analytically pure raw materials.

[0021] The atmospheric pressure microwave synthesizer used in this embodiment is purchased f...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, take 45 mL of formamide in a 50 mL glass three-necked bottle, and then add 0.6-0.9 mmol of sodium tellurite and 0.2-0.4 g of lemon trisodium acid. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 in that in step 1, 45 mL of formamide is put into a 50 mL glass three-necked flask, and then 0.7 mmol of sodium tellurite and 0.3 g of trisodium citrate are added. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for synthesis of a tellurium elementary substance with a grading structure and relates to a tellurium elementary substance synthesis method. The method for synthesis of the tellurium elementary substance with the grading structure aims to solve the problem that according to the prior art, a method for controllable synthesis of the tellurium elementary substance with the monocrystal nanosphere / polycrystal nanotube grading structure is unavailable. The method comprises the steps of (1) stirring the mixture of formamide, sodium tellurite and trisodium citrate and then placing the mixture into an ordinary-pressure microwave synthesis instrument for reaction to obtain a product, and (2) washing and drying the product to obtain the tellurium elementary substance. The method achieves controllable synthesis of the tellurium elementary substance with the monocrystal nanosphere / polycrystal nanotube grading structure, the synthesized tellurium elementary substance with the grading structure is uniform in morphological structure, good in degree of crystallinity and good in repeatability and has the unique core-shell grading structure, the purity of the tellurium elementary substance is over 99%, the core of the tellurium elementary substance is a monocrystal nanotube with a length of 10-15micros, a diameter of 200-300nm and a wall thickness of 30-40nm, and the shell of the tellurium elementary substance is a polycrystal nanosphere with a diameter of 80-120nm. According to the method for synthesis of the tellurium elementary substance with the grading structure, the synthesis technology is simple, devices are simple, operation is conducted under ordinary pressure, reaction temperature is low, and reaction time is short.

Description

technical field [0001] The invention relates to a synthesis method of tellurium simple substance with hierarchical structure, in particular to a synthesis method of tellurium simple substance with nanosphere / nanotube hierarchical structure. Background technique [0002] Tellurium is an important semiconductor material that has attracted extensive research interest due to its unique physical properties such as photoconductivity, pyroelectricity, piezoelectricity, polarization, and nonlinear optical response. One-dimensional tellurium semiconductor materials (such as tellurium rods, tellurium wires, tellurium tubes, etc.) have more special properties in terms of electricity, heat conduction, optics, etc. compared with bulk materials due to their dimensionality limitations, and are used in the manufacture of optoelectronics Devices and other aspects have shown a strong application potential. Therefore, the development of novel, simple and convenient synthetic techniques to pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02B82Y40/00B82Y30/00
Inventor 裴健陈刚于洋李锰马文杰
Owner HARBIN INST OF TECH