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Nano crystal constructed porous copper oxide aggregate and its preparing method

A technology of copper oxide and nanocrystals, which is applied in the direction of nanostructure manufacturing, copper oxide/copper hydroxide, nanotechnology, etc., can solve the problems of high industrialization cost, product pollution, monodispersion, etc., to improve reaction and catalytic activity, facilitate Effect of recycling and reuse, good mechanical strength

Inactive Publication Date: 2009-08-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the reported or disclosed methods, relatively speaking, the cost of industrialization is high, the process is complicated, and the process is difficult to control. The specific surface area of ​​the obtained metal oxide is not high, and the use of soft and hard templates is easy to cause pollution to the product.
Micro-oblate spherical porous copper oxide with high specific surface area, monodisperse structure and nanocrystal structure has not been reported yet

Method used

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  • Nano crystal constructed porous copper oxide aggregate and its preparing method
  • Nano crystal constructed porous copper oxide aggregate and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 50g of copper sulfate in 10L of water, and another 29g of potassium oxalate solution in the same volume of water; add the potassium oxalate solution into the stirred copper sulfate solution, the reaction temperature is 5-10°C; react at this temperature for 60min, and age After 2 hours, the material liquid was taken out and dehydrated, and the obtained product was dried in the air at 80°C for 5 hours to obtain oblate spherical copper oxalate powder.

[0026] Place the dried copper oxalate precursor in a muffle furnace, raise the temperature to 400°C at a rate of 5°C / min, keep it warm for 4h, and then slowly cool to room temperature with the furnace temperature to obtain the nanocrystalline porous copper oxide of the present invention Powder.

[0027] Thermo NORAN VANTAGE EIS X-ray energy dispersive spectrometer (EDS) was used for energy spectrum analysis, and its composition was determined to be CuO; X-ray diffraction was used to characterize the structure of th...

Embodiment 2

[0030] Soluble oxalate uses ammonium oxalate, press n((NH 4 ) 2 C 2 o 4 ): n(CuSO 4 )) = 1:1 ratio feeding, the amount of ammonium oxalate and copper sulfate is 128g and 200g respectively, the reaction temperature is 20-30°C, and the reaction is 30min; when calcining, the temperature is raised to 300°C at a rate of 2°C / min to calcine the precursor body, and incubated for 8h, and others are implemented in the same manner as in Example 1.

[0031] The analysis result of the obtained porous copper oxide material is similar to that of Example 1.

Embodiment 3

[0033] Soluble oxalate is sodium oxalate, press n(Na 2 C 2 o 4 ): n(CuSO 4) = 1.25:1 ratio feeding, the amount of sodium oxalate and copper sulfate is 335g and 500g respectively, 10L copper sulfate solution is added to the sodium oxalate solution under stirring, the reaction temperature is 50 ~ 60 ℃, reaction 15min; with 10 The temperature was raised to 350°C at a rate of °C / min to calcine the precursor, and kept at this temperature for 6 hours, and the rest were implemented in the same manner as in Example 1.

[0034] The analysis result of the obtained porous copper oxide material is similar to that of Example 1.

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Abstract

The invention discloses a porous copper oxide aggregate composed of nano crystals and the preparing method thereof, using bivalent copper ion water solution to react wih oxalic acid radical-containing water solution, firstly preparing cake micron spheroidic copper oxalate aggregate, then burning the synthesized copper oxalate aggregate on control process condtions, and obtaining monodisperse, high-specific surface area, porous coppoer oxide aggregate composed of nano crystals. And it can retain reacting activity of nano grains and avoid their aggregation, and the channel surface is formed by those of nano grains. As a catalyst, it is convenient to recovery and recycle. And the method is simple and convenient, controllable, low-cost and easy to implement scale industrialized production.

Description

technical field [0001] The invention relates to the preparation technology of transition metal oxide nanomaterials and transition metal oxide porous materials, in particular to a porous copper oxide aggregate constructed of nanocrystals and a preparation method. Background technique [0002] Copper oxide is an important transition metal oxide with a variety of catalytic activities. It is widely used in printing and dyeing, medicine, defense industry and other fields. It has been used in oxidation, hydrogenation, CO, solid rocket propellant, hydrocarbon combustion and fine It has been widely used in various catalytic reactions such as chemical synthesis, and has been widely used in C 1 Chemical synthesis, NO x Reduction and gas-sensing materials, lithium-ion batteries, field emitters, oxygen electrode catalysis and other fields also show good application prospects. Due to its special structure, nano-copper oxide exhibits new characteristics and functions. For example, nano-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02B82B3/00
Inventor 岳林海贾志刚
Owner ZHEJIANG UNIV
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