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Method for preparing copper selenide nanowires by microwave-assisted method

A microwave-assisted, copper selenide technology, applied in the direction of nanotechnology, binary selenium/tellurium compounds, etc., can solve the problems of slow heating speed of copper selenide nanowires, unfavorable expansion of production, low heat utilization rate, etc., to achieve the preparation process Environmentally friendly and efficient, easy to promote, and less equipment

Active Publication Date: 2014-06-25
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of slow heating speed, low thermal energy utilization rate, long synthesis cycle, low yield and unfavorable expansion of production in the preparation process of existing copper selenide nanowires, and to provide a microwave-assisted method for preparing selenide nanowires. copper nanowire method

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  • Method for preparing copper selenide nanowires by microwave-assisted method
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  • Method for preparing copper selenide nanowires by microwave-assisted method

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specific Embodiment approach 1

[0021] Specific embodiment one: In this embodiment, a method for preparing copper selenide nanowires by a microwave-assisted method is realized according to the following steps:

[0022] 1. Put 0.16~0.20g of Cu(CH 3 COO) 2 ·H 2 O, 0.08-0.12g of Na 2 SeO 3 , 0.3-0.5g of sodium tartrate was dissolved in 40mL of formamide, and then placed on a magnetic stirrer and stirred at a stirring speed of 4000-8000r / min for 8-20min to obtain a mixed solution A;

[0023] 2. Add 0.3-1.0g of KOH into 10mL of formamide, stir until dissolved, and obtain solution B;

[0024] 3. Add solution B to mixed solution A, then add 0.2-2.0mL hydrazine hydrate dropwise and mix well to obtain mixed solution C;

[0025] 4. Add the mixed solution C into a three-necked flask, put it into a microwave reactor, and then treat it with microwave radiation at a temperature of 160-190°C for 10-20 minutes, and cool it naturally to room temperature to obtain Cu 2-x Se nanowire precursor;

[0026] Five, the Cu 2-...

specific Embodiment approach 2

[0031] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, 0.18g of Cu(CH 3 COO) 2 ·H 2 O, 0.09g of Na 2 SeO 3 , 0.4g of sodium tartrate was dissolved in 40mL of formamide. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0032] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, it is placed on a magnetic stirrer and stirred at a stirring speed of 6000 r / min for 15 min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing copper selenide nanowires by a microwave-assisted method, relates to a method for preparing copper selenide nano-powder, and is used for solving the problems of low heating speed, low utilization rate of heat energy, long synthesis period, low yield and effect of not being conductive to expanded production in the existing preparation process of the copper selenide nanowires. The method comprises the following steps: 1) dissolving Cu(CH3COO)2.H2O, Na2SeO3 and sodium tartrate in formamide to obtain a mixed solution A; 2) adding KOH into formamide to obtain a solution B; 3) adding the solution B into the mixed solution A, and dropping hydrazine hydrate to obtain a mixed solution C; 4) performing microwave radiation treatment to obtain a Cu2-xSe nanowire precursor; 5) centrifugating, washing and drying to obtain the copper selenide nanowires. According to the method, high temperature is not required, the heating speed is high, and the synthesis period is short, the obtained copper selenide power has good crystallinity and narrow particle size distribution, the purity is up to above 99%, the yield is above 90%, and the method is thus conductive to large-scale preparation of the copper selenide nanowires.

Description

technical field [0001] The invention belongs to the field of selenide lithium ion battery electrode materials, and in particular relates to a method for preparing copper selenide nanopowder. Background technique [0002] Copper selenide nanocrystals have become one of the research hotspots in academia because of their diverse composition and wide application in optical filters, solar cells, and superionic conductors. At present, there are many methods for the preparation of copper selenium compounds. For example, Hsu et al. thought that the precursors first prepared CuSe film as the substrate for nanowire formation by chemical vapor deposition method, and then under the action of thermal decomposition, through CuSe The VLS mechanism of the particle as a catalyst, Cu is generated on the precursor substrate 2-x Se nanowires. The prepared nanowires have a diameter of 30-50 nm and a length of several micrometers. Yu et al. used CTAB (cetyltrimethylammonium bromide) as a growt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y40/00
Inventor 陈刚张永强陈大宏徐海明
Owner HARBIN INST OF TECH
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