Method for preparing germanium nano cubic crystals through ionic liquid electro-deposition

An ionic liquid and nanocube technology, which is applied in the field of preparing germanium nanocube structure by using ultraviolet irradiation-assisted ionic liquid electrodeposition method, can solve the problems of difficult repetition and difficult control, and achieve the effects of easy implementation, convenient operation and shortening reaction time.

Active Publication Date: 2013-10-09
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the technical problems that are difficult to control and difficult to repeat when the existing solvent synthesis method synthesizes germanium nano-cubic particles, and provides a method for preparing germanium nano-cubic crystals by electrodeposition of ionic liquids

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  • Method for preparing germanium nano cubic crystals through ionic liquid electro-deposition
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  • Method for preparing germanium nano cubic crystals through ionic liquid electro-deposition

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specific Embodiment approach 1

[0019] Embodiment 1: A method for preparing germanium nanocubic crystals by ionic liquid electrodeposition according to the present embodiment is carried out according to the following steps:

[0020] 1. Put the ITO conductive glass substrate with surface resistance ≤ 15Ω / □ into acetone, methanol and ultrapure water for ultrasonic cleaning;

[0021] Two, 1-ethyl-3-methylimidazole bis trifluoromethanesulfonimide salt (EmimTF 2 N) the ionic liquid is purified by distillation under reduced pressure, and then the concentration of high-purity germanium tetrachloride is 0.1mol / L~0.3mol / L. In the glove box, high-purity germanium tetrachloride is added to the purified 1- Ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt ionic liquid, aging for 12h to 24h to obtain an electrolyte;

[0022] 3. Put the electrolytic cell into the glove box. The electrolytic cell uses a platinum ring as a contrast electrode, a silver wire as a reference electrode, and the ITO conductive glass su...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that the ultrasonic frequency during ultrasonic cleaning in step 1 is 20-40 kHz, and the cleaning time is 10-20 minutes; other aspects are the same as Embodiment 1.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the vacuum degree of vacuum distillation in step 2 is 2 * 10 -4 Pa~5×10 -4 Pa, the temperature of the vacuum distillation is 100-120° C., and the time of the vacuum distillation is 12-24 hours; the others are the same as the specific embodiment 1 or 2.

[0029] In this embodiment, a vacuum distillation method is used for purification treatment, so as to prevent the water in the ionic liquid from affecting the electrodeposition.

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Abstract

The invention provides a method for preparing germanium nano cubic crystals through ionic liquid electro-deposition and relates to a preparation method of nano cubic crystal germanium. The method is used for solving the technical problem of difficulty in control and repetition in synthesis of nano cubic particles of germanium by the existing solvent synthetic method. The method comprises the following steps of: building an electrolytic tank for ultraviolet assisted electro-deposition in a glove box, wherein the electrolytic tank contains ionic liquid EmimTF2N electrolyte containing high-purity GeCl4; and then carrying out irradiation by using an ultraviolet lamp with the wavelength of 365nm; firstly, performing cyclic voltammetry curve scanning and then keeping ultraviolet irradiation, and then carrying out potentiostatic method based electro-deposition, and finally, cleaning the sample by using anhydrous isopropyl alcohol, thus obtaining the germanium nano cubic crystals. The method provided by the invention is simple in process and convenient to operate. Besides, the obtained germanium thin film deposited with germanium nano cubic crystals can be applied to a photoluminescent device and the like.

Description

technical field [0001] The invention relates to a method for preparing germanium with nanocubic crystals, in particular to a method for preparing germanium nanocubic structure by using an ionic liquid electrodeposition method assisted by ultraviolet irradiation. Background technique [0002] At present, the preparation and performance research of nanomaterials have attracted much attention, because their small size effect can directly affect the performance, and they can have special optical, electrical and other properties. Germanium material has high refractive index and high dielectric constant, and is a widely used semiconductor material. It has important applications in photoelectric sensors, gas sensors, and infrared and other fields. Nanostructured germanium has special effects such as photoluminescence, electroluminescence, and surface Raman enhancement. Generally speaking, spherical nanoparticles are easier to obtain due to the lowest surface energy. Nanoparticles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02
Inventor 李垚刘昕安小坤赵九蓬郝健
Owner HARBIN INST OF TECH
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