Preparation method of zinc oxide nano-particles for fast detecting explosive atmosphere

A technology of zinc oxide nano and explosives, which is applied in the field of functional materials science and gas-sensing sensing materials, 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
CN104944463AActive Publication Date: 2015-09-30XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
Publication Date
2015-09-30

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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.
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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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