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Preparation method of zinc oxide nanoparticles for rapid detection of explosive atmosphere

A technology of zinc oxide nano and explosives, applied in the field of gas-sensitive sensing materials and functional materials science, can solve the problems of high power consumption, unfavorable detection, high operating temperature, etc., achieve low detection limit, fast response, and improve adsorption performance Effect

Active Publication Date: 2016-08-24
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the actual detection of the known zinc oxide gas sensitive materials, the operating temperature is high, the power consumption is high, and it is not conducive to the detection of explosives.

Method used

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  • Preparation method of zinc oxide nanoparticles for rapid detection of explosive atmosphere
  • Preparation method of zinc oxide nanoparticles for rapid detection of explosive atmosphere
  • Preparation method of zinc oxide nanoparticles for rapid detection of explosive atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a. Dissolve 1.4875 grams of zinc nitrate hexahydrate in blue bottle A containing 50 ml of absolute ethanol;

[0039] b. Dissolve 0.4208 g of potassium hydroxide in blue-necked bottle B containing 50 ml of absolute ethanol, stir magnetically until completely dissolved, then transfer the blue-necked bottle A of step a and the blue-necked bottle B of step b to the refrigerator , frozen for 12 hours;

[0040] c. Add the solution in the blue-necked bottle B to the blue-necked bottle A, stir magnetically until the mixture is uniform, put the solution in a water bath, control the temperature of the water bath to 60 °C, and stir for 24 hours to obtain an opaque colloid;

[0041]d, disperse the opaque colloid obtained in step c in n-heptane, centrifuge, disperse the centrifuged sediment in absolute ethanol, centrifuge again, and use two washings as a washing cycle, repeat the washing cycle 3 times, The washed precipitate was transferred to a watch glass, dried in an oven at 80 ...

Embodiment 2

[0044] a. Dissolve 1.4875 grams of zinc nitrate hexahydrate in blue bottle A containing 50 ml of absolute ethanol;

[0045] b. Dissolve 0.3000 g of sodium hydroxide in the blue-necked bottle B containing 50 ml of absolute ethanol, stir magnetically until completely dissolved, then transfer the blue-necked bottle A of step a and the blue-necked bottle B of step b to the refrigerator , frozen for 12 hours;

[0046] c. Add the solution in the blue-necked bottle B to the blue-necked bottle A, stir magnetically until evenly mixed, put the solution in a water bath, control the temperature of the water bath to 60°C, and stir for 24 hours to obtain an opaque colloid;

[0047] d, disperse the opaque colloid obtained in step c in n-heptane, centrifuge, disperse the centrifuged sediment in absolute ethanol, centrifuge again, and use two washings as a washing cycle, repeat the washing cycle 3 times, The washed precipitate was transferred to a watch glass, dried in an oven at 80 °C for 12...

Embodiment 3

[0050] a. Dissolve 1.4875 grams of zinc nitrate hexahydrate and 0.0727 grams of nickel nitrate in blue bottle A containing 50 ml of absolute ethanol;

[0051] b. Dissolve 0.3000 g of sodium hydroxide in the blue-necked bottle B containing 50 ml of absolute ethanol, stir magnetically until completely dissolved, then transfer the blue-necked bottle A of step a and the blue-necked bottle B of step b to the refrigerator , frozen for 12 hours;

[0052] c. Add the solution in the blue-necked bottle B to the blue-necked bottle A, stir magnetically until evenly mixed, put the solution in a water bath, control the temperature of the water bath to 25°C, and stir for 0.5 h to obtain an opaque colloid;

[0053] d. Disperse the opaque colloid obtained in step c in n-hexane, centrifuge, disperse the centrifuged sediment in absolute ethanol, centrifuge again, use two washes as a wash cycle, repeat the wash cycle 3 times, and The washed precipitate was transferred to a watch glass, dried in ...

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Abstract

The invention provides a preparation method of zinc oxide nano-particles for fast detecting explosive atmosphere. The method includes two steps that zinc oxide nano-sheets are prepared and the zinc oxide nano-particles are formed in the annealing treatment process. Zinc oxide prepared through a sol-gel method and transition metal doped zinc oxide are of a nano-sheet structure and a nano-particle structure, transition metal doping can change the energy band structure of the nano-sheet structure and the nano-particle structure of the zinc oxide and increase the surface defects of materials, and therefore the gas-sensitive property of the materials is improved. A zinc oxide nano-particle material obtained through the method can sensitively and fast detect the detonable atmosphere with the raw materials being ammonium nitrate, urea and various nitro-explosives such as trinitrotoluene, dinitrotoluene, nitrotoluene, picric acid and cyclonite at room temperature of 25 DEG C in 2-50 seconds, responding is fast, and the detection limit is low.

Description

technical field [0001] The invention relates to the field of functional material science and the field of gas-sensitive sensing materials, in particular to a preparation method of zinc oxide nano-particles for rapid detection of explosive atmosphere. Background technique [0002] Explosives fall into two categories: standard and non-standard. Nitro explosives, such as trinitrotoluene (TNT), dinitrotoluene (DNT), p-nitrotoluene (PNT), picric acid (PA), and RDX, are an important class of standard explosives It has the characteristics of low saturated vapor pressure at room temperature, and the corresponding saturated vapor pressure of the above-mentioned explosives is 9 ppb (10 -9 ), 180 ppb, 647 ppb, 0.97 ppb and 4.9 ppt (10 -12 ), it is difficult to detect its atmosphere at room temperature. [0003] Powdered ammonium nitrate explosives are made of a mixture of oxidizers, combustibles and sensitizers, and ammonium nitrate is the main oxidizer of powdered ammonium nitrate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 窦新存屈江
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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