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Zinc oxide composite material modified by phthalocyanines copper and producing method and function thereof

A composite material, copper phthalocyanine technology, applied in the direction of analyzing materials, material analysis by optical means, measuring devices, etc., can solve the problems of difficult zinc oxide, reduced specific surface area of ​​zinc oxide, difficult gas-sensing properties, etc., to achieve easy industrialization Production and preparation methods are scientific, and the effect of simple preparation equipment

Inactive Publication Date: 2013-06-05
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

However, there are deficiencies in both the optical fiber sensing element and its preparation method. First, the film-like zinc oxide and the copper phthalocyanine covered thereon not only make it difficult to increase the specific surface area of ​​the copper phthalocyanine. The specific surface area of ​​zinc oxide is greatly reduced, which is extremely unfavorable for its adsorption and response to gas molecules; secondly, the zinc oxide in the optical fiber sensing element is covered by copper phthalocyanine, which limits the normal performance of the gas-sensing performance of zinc oxide , so that it is difficult for zinc oxide to exert its gas-sensing performance alone or together with copper phthalocyanine, which greatly reduces the composite performance of the sensing element, making it especially unusable for detecting organic compounds with electron-withdrawing properties; finally, the preparation method Unavailable end products for detection of organic compounds with electron-withdrawing properties

Method used

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  • Zinc oxide composite material modified by phthalocyanines copper and producing method and function thereof
  • Zinc oxide composite material modified by phthalocyanines copper and producing method and function thereof
  • Zinc oxide composite material modified by phthalocyanines copper and producing method and function thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The concrete steps of preparation are:

[0029] Step 1, first dropwise add a zinc chloride solution with a concentration of 0.01mol / L to a saturated oxalic acid solution at a temperature of 70°C under stirring; wherein, the rate of dropping is 2ml / min, and a white precipitate is obtained. After washing the white precipitate repeatedly with water and ethanol in sequence, it is dried; wherein, the number of times of repeated washing is more than 3 times, the temperature of the drying treatment is 70 ° C, and the time is 3 hours to obtain the dihydrate zinc oxalate precursor. Next, the precursor of zinc oxalate dihydrate was calcined at 480°C for 2 hours to obtain an approximate figure 1 The porous zinc oxide micron powder shown.

[0030] In step 2, copper phthalocyanine, acetylacetone and ethanol are first mixed according to a molar ratio of 0.002823:0.6738:0.2091 to obtain an impregnation solution. According to the molar ratio between zinc oxide and copper phthalocyanine...

Embodiment 2

[0032] The concrete steps of preparation are:

[0033] In step 1, a zinc chloride solution with a concentration of 0.015 mol / L is added dropwise to a saturated oxalic acid solution at a temperature of 75° C. under stirring; wherein, the rate of dropping is 2 ml / min, and a white precipitate is obtained. After washing the white precipitate repeatedly with water and ethanol in sequence, it is dried; wherein, the number of times of repeated washing is more than 3 times, the temperature during the drying treatment is 75°C, and the time is 2.5h, and the precursor of zinc oxalate dihydrate is obtained. . Next, the precursor of zinc oxalate dihydrate was calcined at 490°C for 1.8 hours to obtain an approximate figure 1 The porous zinc oxide micron powder shown.

[0034] In step 2, copper phthalocyanine, acetylacetone and ethanol are first mixed according to the molar ratio of 0.002824:0.6737:0.2092 to obtain an impregnation solution. Then according to the molar ratio between zinc o...

Embodiment 3

[0036] The concrete steps of preparation are:

[0037] In step 1, a zinc chloride solution with a concentration of 0.02 mol / L is added dropwise to a saturated oxalic acid solution at a temperature of 80° C. under stirring; wherein, the dropping rate is 2 ml / min to obtain a white precipitate. After washing the white precipitate repeatedly with water and ethanol in sequence, it is dried; wherein, the number of times of repeated washing is more than 3 times, the temperature of the drying treatment is 80° C., and the time is 2 hours to obtain the zinc oxalate dihydrate precursor. Next, the dihydrate zinc oxalate precursor was roasted at a temperature of 500°C for 1.5h to obtain the following figure 1 The porous zinc oxide micron powder shown.

[0038] In step 2, copper phthalocyanine, acetylacetone and ethanol are first mixed in a molar ratio of 0.002825:0.6736:0.2093 to obtain an impregnation solution. Then according to the molar ratio between zinc oxide and copper phthalocyani...

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Abstract

The invention discloses a zinc oxide composite material modified by phthalocyanines copper, a producing method and a function of the zinc oxide composite material modified by phthalocyanines copper. Materials are zinc oxide porous micron blocks with surfaces modified by the phthalocyanines copper, the specific surface area is 8-9<2> / g, the length of each porous micron block is 5-10 mu m, the height of each porous micron block is 10-20 mu m, and the diameter of a pore in each porous micron block is 20-70 nm. The method is that firstly a zinc chloride solution is dropwise added in a stirred oxalic acid saturated solution so as to obtain white precipitate, and the white precipitate is repeatedly washed by water and ethylalcohol in sequence and is dried so as to obtain a zinc oxalate dihydrate precursor; then the zinc oxalate dihydrate precursor is baked so as to obtain porous zinc oxide micron powder; thirdly the phthalocyanines copper, acetylacetone and the ethylalcohol are mutually mixed so as to obtain steeping liquor, and the porous zinc oxide micron powder is placed in the stirred steeping liquor for at least 5 hours and is filtered, washed and dried, so that a target product is produced. The zinc oxide composite material modified by phthalocyanines copper is used for detecting an organic matter which is stable in performance but has the electron-withdrawing performance.

Description

technical field [0001] The invention relates to a composite material and its preparation method and application, in particular to a zinc oxide composite material modified with copper phthalocyanine and its preparation method and application. Background technique [0002] Gas sensors have important applications in the fields of environmental detection, chemical industry and food industry. People have made unremitting efforts to obtain gas sensors with high sensitivity and good stability. For example, the Chinese invention patent published on June 2, 2010 Application document CN 101718693A discloses "an optical fiber nitrogen dioxide gas concentration measuring instrument with fiber core mismatch". The optical fiber sensing element mentioned in this application document is a nanocomposite film of zinc oxide and copper phthalocyanine deposited on a bare single-mode optical fiber, wherein the thickness of the zinc oxide film is 5-10 nm, and the thickness of the copper phthalocya...

Claims

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Application Information

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IPC IPC(8): G01N21/17
Inventor 李明涛孟国文尹志军黄青
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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