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Preparation method of single crystal tellurium nanorod

A technology of tellurium nanorods and single crystals, which is applied in the field of preparation of single crystal tellurium nanorods, can solve the problems of complicated process, the diameter of tellurium nanorods cannot be adjusted independently, environmental pollution, etc., and achieve simple process, simple preparation method and low production cost low effect

Active Publication Date: 2017-05-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this growth method can obtain tellurium nanorods, there are also shortcomings. First, the process is complicated; second, the hydrogen telluride involved in the raw material is a poisonous gas, which is easy to cause environmental pollution; The penetration time of the Te nanorods only affects the growth length of the Te nanorods, so the diameter of the Te nanorods cannot be adjusted independently

Method used

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  • Preparation method of single crystal tellurium nanorod
  • Preparation method of single crystal tellurium nanorod
  • Preparation method of single crystal tellurium nanorod

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Effect test

Embodiment 1

[0028] The concrete steps of preparation are:

[0029] Step 1, first according to the weight ratio of tellurium dioxide, alkali and ethylene glycol, the three are stirred and mixed in the ratio of 1:3.0:500; wherein, the alkali is potassium hydroxide, the temperature during mixing is 120 ° C, and the stirring time is After 40 min, a mixed solution was obtained. Add polyvinylpyrrolidone and 15wt% ascorbic acid aqueous solution to the mixed solution to obtain a precursor solution; wherein, the weight ratio of the mixed solution, polyvinylpyrrolidone and ascorbic acid aqueous solution in the precursor solution is 20:0.3:3.

[0030] In step 2, first place the precursor solution at 160° C. for a closed reaction for 24 hours to obtain a reaction slurry. Carry out the treatment of solid-liquid separation and washing to the reaction slurry after cooling again; Wherein, solid-liquid separation treatment is centrifugation, and its rotating speed is 3000r / min, time is 15min, and washing...

Embodiment 2

[0032] The concrete steps of preparation are:

[0033] Step 1, the three are stirred and mixed according to the weight ratio of tellurium dioxide, alkali and ethylene glycol at a ratio of 1.13:2.9:513; wherein, the alkali is potassium hydroxide, the temperature during mixing is 120°C, and the stirring time is After 40 min, a mixed solution was obtained. Add polyvinylpyrrolidone and 18wt% ascorbic acid aqueous solution to the mixed solution to obtain a precursor solution; wherein, the weight ratio of the mixed solution, polyvinylpyrrolidone and ascorbic acid aqueous solution in the precursor solution is 20:0.28:2.8.

[0034] In step 2, first place the precursor solution at 170° C. for 20 hours in a closed reaction to obtain a reaction slurry. Carry out the treatment of solid-liquid separation and washing to the reaction slurry after cooling again; Wherein, solid-liquid separation treatment is centrifugation, and its rotating speed is 4000r / min, time is 14min, and washing treat...

Embodiment 3

[0036] The concrete steps of preparation are:

[0037] Step 1, first according to the weight ratio of tellurium dioxide, alkali and ethylene glycol, the three are stirred and mixed in the ratio of 1.15:2.8:525; wherein, the alkali is potassium hydroxide, the temperature during mixing is 120 ° C, and the stirring time is After 40 min, a mixed solution was obtained. Then add polyvinylpyrrolidone and 20wt% ascorbic acid aqueous solution to the mixed solution to obtain a precursor solution; wherein, the weight ratio of the mixed solution, polyvinylpyrrolidone and ascorbic acid aqueous solution in the precursor solution is 20:0.25:2.5.

[0038] In step 2, first place the precursor solution at 180° C. for 15 hours in a closed reaction to obtain a reaction slurry. Carry out the treatment of solid-liquid separation and washing to the reaction slurry after cooling again; Wherein, solid-liquid separation treatment is centrifugation, and its rotating speed is 5000r / min, time is 13min, a...

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Abstract

The invention discloses a preparation method of a single crystal tellurium nanorod. The preparation method comprises the steps of stirring and mixing tellurium dioxide, alkali and ethylene glycol to obtain mixed liquor; adding polyvinylpyrrolidone and an ascorbic acid aqueous solution into the mixed liquor to obtain a precursor solution; enabling the precursor solution to react at the temperature ranging from 160 to 200 DEG C for 6 to 24h in a sealing manner, and obtaining a reacted sizing agent; carrying out solid-liquid separation and washing on the cooled reacted sizing agent, and preparing to obtain the hexagonal phase single crystal tellurium nanorod with the rod length ranging from 0.4 to 0.8mu m and the rod diameter ranging from 70 to 120nm. The preparation method is simple and convenient in process, and is green and environment-friendly, the rod length and the rod diameter can be controlled artificially, industrial large-scale production can be easily implemented, and a prepared target product is easily commercialized so as to be widely applied in the fields such as photoconduction detection and non-linear optics.

Description

technical field [0001] The invention relates to a preparation method of nanorods, in particular to a preparation method of single crystal tellurium nanorods. Background technique [0002] Tellurium (Te) with a band gap of about 0.34eV at room temperature, as a p-type narrow band gap semiconductor material, has been widely used in photoconductive detection, nonlinear optics and other fields. In recent years, one-dimensional Te nanomaterials have become a research hotspot due to their large specific surface area and good carrier transport properties, which can produce a photoconductive gain much greater than that of bulk materials, such as the title "Room-Temperature Growth of Uniform Tellurium Nanorods and the Assembly of Tellurium or Fe 3 o 4 Nanoparticles on the Nanorods", Advanced Materials, 2008,20(5):947-952 ("Te nanorods with uniform size grown at room temperature and their combination with Fe 3 o 4 Nanoparticle Self-Assembly Composite", "Journal of Advanced Materia...

Claims

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Application Information

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IPC IPC(8): C30B7/14C30B29/02C30B29/60B82Y40/00
CPCB82Y40/00C30B7/14C30B29/02C30B29/60
Inventor 费广涛仲斌年
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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