Nanometer sensitive material of organic chlorine agriculture chemicals

A sensitive material and organochlorine technology, applied in the field of sensing, can solve problems such as difficulty in popularization, and achieve the effects of uniform particle growth, slow precipitation process, and high sensitivity

Inactive Publication Date: 2008-08-27
BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of these technologies has greatly improved the qualitative ability, detection sensitivity, detection limit and detection coverage of pesticide residue detection. However, these analytical technologies are based on large-scale analytical instruments and are difficult to popularize due to the constraints of conditions, funds and sites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh butyl titanate and nickel nitrate hexahydrate according to the atomic ratio of Ti to Ni of 100:15. Butyl titanate is dissolved in twice the weight of 50% ethanol aqueous solution, and nickel nitrate hexahydrate is dissolved in equal weight. The above two solutions are heated to 45℃ separately, and then mixed, keep the temperature and keep stirring, slowly add 20% ammonia water dropwise, the drop amount is 1 / 5 of the total amount of the mixed solution, and the dropping rate is two 1 drop per second. After the addition is complete, cool to room temperature and continue stirring for 1 hour; let stand for 8 hours, filter the precipitate under reduced pressure and wash twice with deionized water, and dry at 115°C for 2 hours; In a high temperature box-type resistance furnace at a rate of 2°C per minute to 400°C, keep the temperature for 2 hours; cool to room temperature, after careful grinding, place it in the high-temperature box-type resistance furnace again at a rate of...

Embodiment 2

[0015] Weigh butyl titanate and nickel chloride hexahydrate according to the atomic ratio of Ti to Ni of 100:18. Butyl titanate is dissolved in twice the weight of 60% ethanol aqueous solution, and nickel chloride hexahydrate is dissolved In an equal weight 5% hydrochloric acid aqueous solution; heat the above two solutions separately to 45℃ and mix, keep the temperature and keep stirring, slowly add 30% ammonia water dropwise, the amount of drop is 1 / 5 of the total amount of the mixed solution, the rate of drop One drop for two seconds. After the addition is complete, cool to room temperature and continue stirring for 1 hour; let stand for 8 hours, filter the precipitate under reduced pressure and wash twice with deionized water, and dry at 115°C for 2 hours; after thorough grinding , Placed in a high-temperature box-type resistance furnace at a rate of 3°C per minute to 400°C, keep the temperature for 2 hours; cool to room temperature, after careful grinding, again placed in a h...

Embodiment 3

[0017] Weigh butyl titanate and nickel sulfate according to the atomic ratio of Ti to Ni of 100:20. Butyl titanate is dissolved in twice the weight of 50% ethanol aqueous solution, and nickel sulfate is dissolved in equal weight of 10% hydrochloric acid. In aqueous solution; heat the above two solutions separately to 45℃ and mix them, keep the temperature and keep stirring, slowly add 30% ammonia water dropwise, the drop amount is 1 / 4 of the total amount of the mixed solution, the dropping rate is 1 drop in two seconds After the addition is complete, cool to room temperature and continue stirring for 1 hour; let stand for 8 hours, filter the precipitate under reduced pressure and wash twice with deionized water, and dry at 115°C for 2 hours; after fully grinding, place in a high temperature box In the resistance furnace, the temperature is raised to 400°C at a rate of 5°C per minute, and the temperature is maintained for 2 hours; after cooling to room temperature, after careful gr...

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Abstract

The invention relates to nano sensitized materials for an organochlorine pesticide, which is characterized in that titanium salts and nickel salts which are used as raw materials undergo steps of dissolution, deposition, aging, filtering, washing, drying, grinding and calcining, etc., forming Tio2 nano powder dressed by Nio, wherein the ratio between Ti atoms and Ni atoms, the grain size of which is less than 50nm, is 100:15 to 25. A sensor of the organochlorine pesticide made of sensitized materials of the invention has the advantages of good selectivity and flexibility and being capable of detecting the content of the organochlorine pesticide in different agricultural products.

Description

Technical field [0001] The invention relates to a sensitive material for monitoring organochlorine pesticides, especially TiO modified by Ni 2 Type nano composite oxide sensitive material belongs to the field of sensing technology. Background technique [0002] With the development of agricultural industrialization, chemical pesticides are playing an increasingly important role in the production of agricultural products such as grains, vegetables, fruits, tea and medicinal materials in my country. However, because people do not have enough knowledge about the movement laws of pesticides in natural organisms, such as metabolic pathways, degradation methods, and residue accumulation, they often ignore the benefits of chemical pesticides while enjoying the joy of harvest. harm. One of the key links in controlling pesticide residues in agricultural products is to conduct timely and accurate analysis and testing of pesticide residues in agricultural products to monitor the rational us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00
Inventor 周考文马燕玲王飞旭
Owner BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV
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