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Micro-nano structure zinc oxide-carbon composite pellet and preparation method thereof

A technology of micro-nano structure and zinc oxide, applied in the preparation of microspheres, carbon preparation/purification, chemical instruments and methods, etc., can solve the problems of long time, difficult specific surface area, too smooth, etc., which is conducive to industrial scale production, The preparation method is scientific and the effect of improving stability

Inactive Publication Date: 2013-06-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both the final product and its preparation method have shortcomings. First, although the surface of ZnO-carbon microspheres has nanopore defects, it is too smooth, making it difficult to have a large specific surface area; secondly, There is an obvious interface between zinc oxide particles and carbon microspheres, which shows that the tightness of the combination of the two is not ideal; finally, the reaction temperature in the preparation method is too high, the time is too long, and the temperature during annealing is also high. It consumes energy and time, and cannot obtain a final product with a high specific surface area

Method used

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  • Micro-nano structure zinc oxide-carbon composite pellet and preparation method thereof
  • Micro-nano structure zinc oxide-carbon composite pellet and preparation method thereof
  • Micro-nano structure zinc oxide-carbon composite pellet and preparation method thereof

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Effect test

Embodiment 1

[0025] The concrete steps of preparation are:

[0026] Step 1, first according to the weight ratio between zinc acetate dihydrate, urea, sodium citrate dihydrate, glucose and water is the ratio of 0.64:0.56:0.05:1.2:48, zinc acetate dihydrate, urea, lemon dihydrate Sodium bicarbonate and glucose were dissolved in water to obtain a mixed solution. Then the mixed solution was placed in a closed state, and reacted at a temperature of 120° C. for 4 hours to obtain a reaction solution.

[0027] In step 2, the reaction solution is first subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation treatment is centrifugation, and the rotation speed during separation is 3000r / min, and the washing treatment is to use deionized water and ethanol for cleaning. The drying treatment is air drying at 10° C. to obtain an intermediate product. Then the intermediate product is placed in an inert gas atmosphere, annealed at 300 ° C for 2 h; wherei...

Embodiment 2

[0029] The concrete steps of preparation are:

[0030] Step 1, first according to the weight ratio between zinc acetate dihydrate, urea, sodium citrate dihydrate, glucose and water is the ratio of 0.65:0.55:0.055:1.1:49, zinc acetate dihydrate, urea, lemon dihydrate Sodium bicarbonate and glucose were dissolved in water to obtain a mixed solution. Then the mixed solution was placed in a closed state, and reacted at a temperature of 130° C. for 3.5 hours to obtain a reaction solution.

[0031]In step 2, the reaction solution is first subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, and the rotation speed during separation is 3500r / min, and the washing process is to use deionized water and ethanol for cleaning. The drying treatment is air drying at 20° C. to obtain an intermediate product. Then the intermediate product was placed in an inert gas atmosphere, annealed at 330°C for 1.8h; wherein,...

Embodiment 3

[0033] The concrete steps of preparation are:

[0034] Step 1, first according to the weight ratio between zinc acetate dihydrate, urea, sodium citrate dihydrate, glucose and water is the ratio of 0.66:0.54:0.06:1:50, zinc acetate dihydrate, urea, lemon dihydrate Sodium bicarbonate and glucose were dissolved in water to obtain a mixed solution. Then the mixed solution was placed in a closed state, and reacted at a temperature of 140° C. for 3 hours to obtain a reaction solution.

[0035] In step 2, the reaction solution is first subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, and the rotation speed during separation is 4000r / min, and the washing process is to use deionized water and ethanol for cleaning. The drying treatment is air drying at 30° C. to obtain an intermediate product. Then the intermediate product is placed in an inert gas atmosphere, annealed at 350 ° C for 1.5 h; wherein, t...

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Abstract

The invention discloses a micro-nano structure zinc oxide-carbon composite pellet and a preparation method thereof. The micro-nano structure zinc oxide-carbon composite pellet is obtained by hybridization compounding of zinc oxide and carbon to obtain a solid pellet having the diameter of 6-12 micrometers, wherein vertical nanosheets having the length of 700-900 nanometers, the height of 700-900 nanometers and the thickness of 15 to 25 nanometers are formed on surfaces of the solid pellet and are connected with each other into a nest; a mole ratio of zinc oxide to carbon is (60-70%): (30-40%); zinc oxide has a hexagonal structure; and carbon comprises amorphous carbon and graphitized carbon and a weight ratio of the amorphous carbon to the graphitized carbon is (85-95%): (5-15%). The preparation method comprises the following steps of dissolving zinc acetate dihydrate, urea, sodium citrate dihydrate and glucose in water to obtain a mixed solution, carrying out hydrothermal treatment on the mixed solution to obtain a reaction solution, orderly carrying out solid-liquid separation, washing and drying to obtain an intermediate product, putting the intermediate product in an inert gas atmosphere, and carrying out annealing to obtain the micro-nano structure zinc oxide-carbon composite pellet. The micro-nano structure zinc oxide-carbon composite pellet can be widely used for fields of catalysis, adsorption and photoelectricity.

Description

technical field [0001] The invention relates to a composite ball and a preparation method thereof, in particular to a micronano structure zinc oxide-carbon composite ball and a preparation method thereof. Background technique [0002] Zinc oxide is an excellent semiconductor material, which is widely used in environmental governance and optoelectronic devices; for example, its excellent photocatalytic performance can degrade toxic organic pollutants into carbon dioxide and water under the irradiation of ultraviolet light or even sunlight. Utilizing its excellent piezoelectric performance, it can be made into a nanogenerator device, and its excellent photoelectric conversion performance can make it widely used in solar cells. Carbon materials with excellent electrical conductivity and adsorption properties are widely used in the fields of optoelectronics and hydrogen storage. Based on the above two points, recently, people have made unremitting efforts to obtain zinc oxide-c...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01G9/02B01J13/02B82Y30/00B82Y40/00C01B32/05C01B32/205
Inventor 王献彪蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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