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Copper-doped titanium dioxide collosol bactericide and preparation method and use thereof

A titanium dioxide and copper doping technology, which is applied in the direction of fungicides, botanical equipment and methods, biocides, etc., to achieve the effects of avoiding residues, improving quality, and low prices

Inactive Publication Date: 2009-05-06
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are very few reports at home and abroad on the application of titanium dioxide to the prevention of crop diseases.

Method used

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  • Copper-doped titanium dioxide collosol bactericide and preparation method and use thereof

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Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: 1. take titanium sulfate 80g and dissolve, add 0.65g copper nitrate by copper and titanium 1.5% mol ratio; 2. drip the ammoniacal liquor of 3mol / L in constantly stirring as precipitation agent, the mol ratio of titanium and alkali is 1: 12. After the precipitation is complete, adjust the pH value above 9 with 3mol / L ammonia water, and then stir for 2-3 hours; ③Filtrate and wash until there is no sulfate ion; ④Stir the filter residue with water, add 220ml of 1mol / L nitric acid dropwise, The molar ratio to the acid is 2.3:1, degumming at a constant temperature of 60°C-90°C, stirring continuously, and continuing to stir for 12 hours after adding the acid, to obtain 1.8L of copper-doped titanium dioxide sol fungicide.

Embodiment 2

[0018] Embodiment 2: 1. measure titanium tetrachloride 50ml and add dropwise in the ice-water bath of 250ml, add 0.8g copper nitrate by copper and titanium 1.1% mol ratio, stir 1 hour; 2. add the ammoniacal liquor of 3mol / L in constantly stirring as Precipitating agent, the molar ratio of titanium to alkali is 1:18. After the precipitation is complete, use 3mol / L ammonia water to adjust the pH value above 9, and then stir for 2-3 hours; ③filter and wash until there is no sulfate ion; ④Add water to the filter residue and stir Mix evenly, add 220ml of 1mol / L nitric acid, the molar ratio of titanium to acid is 2.1:1, degumming at a constant temperature of 60°C-90°C, stirring continuously, and stirring for 12 hours after adding the acid, to obtain 2L of copper-doped titanium dioxide Sol fungicide.

[0019] The invention is widely used for the inhibition and control of bacteria and fungi. Especially the control of bacterial and fungal diseases of fruits and vegetables. Use bacter...

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Abstract

The invention discloses a copper-doped titanium dioxide sol disinfectant as well as a preparation method and usages thereof. The copper-doped titanium dioxide sol disinfectant comprises the following components: 1.4 to 1.9 percent of copper-doped titanium dioxide and the rest component of water. The preparation method thereof is as follows: after a titanium compound is dissolved, cupric salt liquid is added; alkali is added during the stirring process; then the mixture is filtered and washed until the mixture does not contain sulfate ions; acid hydrolysis sol is added into the filter residue and continuously stirred to obtain the titanium dioxide sol disinfectant. The invention is used for preventing and controlling the growing and spreading of bacteria and fungi, in particular to preventing and controlling a citrus canker and the bacteria and epiphyte diseases of fruits and vegetables, being capable of reducing the use of pesticide and improving the quality of farm and sideline products; besides, the invention is innoxious, is environmental protective, can not cause secondary pollution, avoids the residue of the tradition pesticide in crops and considers disease preventing, sterilization and green production. Simultaneously the disinfectant is broad in material resources, low in cost and less in pollution; the dispersity and the degree of crystallization of the sol are better; moreover, the activity of the visible light thereof can be greatly improved through doping copper.

Description

Technical field [0001] The invention relates to an environment-friendly fungicide for preventing and controlling the growth and spread of bacteria and fungi, in particular to copper-doped titanium dioxide sol, and also relates to its preparation method and application. Background technique: [0002] At present, there are many known fungicides. According to the chemical composition, it is mainly divided into inorganic fungicides and organic fungicides. Inorganic fungicides mainly include inorganic copper and sulfur fungicides, mainly including: copper sulfate, Bordeaux mixture (basic copper sulfate), king copper (copper oxychloride), copper hydroxide and sulfur. Inorganic copper and sulfur fungicides are used for the prevention and control of blight, mildew, angular leaf spot, soft rot, etc. of vegetable crops such as cucumbers, peppers, and tomatoes. There are many types of organic fungicides, such as organic sulfur, triazoles, phenylamide organic phosphorus, etc., which a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/20A01N59/00A01P1/00A01P3/00
CPCY02A50/30
Inventor 梁春华李昌灵
Owner HUAIHUA UNIV
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