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Rare earth doped nanometer titanium dioxide suspension emulsion and preparation method thereof

A technology of rare earth doping and suspending emulsion, which is applied in botany equipment and methods, biocides, animal repellents, etc., can solve the problems of easy delamination, achieve good stability, convenient use, and improve photocatalytic activity Effect

Inactive Publication Date: 2012-11-21
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the rare earth doped nano-TiO 2 The shortcoming of directly adding water and easy delamination, the present invention provides a kind of rare earth doped nano-TiO 2 Suspoemulsion and its preparation method

Method used

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  • Rare earth doped nanometer titanium dioxide suspension emulsion and preparation method thereof
  • Rare earth doped nanometer titanium dioxide suspension emulsion and preparation method thereof
  • Rare earth doped nanometer titanium dioxide suspension emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, preparation 20% cerium doped nanometer TiO 2 suspoemulsion

[0032] Rare earth doped nano TiO 2 Suspoemulsion, consisting of the following mass percentages: 20% cerium-doped nano-TiO 2 (0.5% Ce 3+ -TiO 2 ), 4% sodium lignosulfonate, 3% agricultural milk 500#, 7% agricultural milk 600#, 5% ethylene glycol, 0.1% xanthan gum, 0.1% octanol, and the balance is deionized water.

[0033] The preparation method is as follows:

[0034] 1) Put Nongru 600# in a water bath at 70°C for 0.2h to melt;

[0035] 2) Fully wetting the xanthan collagen powder with methanol, then adding water while stirring to prepare an aqueous solution of xanthan gum with a mass concentration of 5%;

[0036] 3) Take 20 parts by mass of nano-TiO 2 , 4 parts by mass of sodium lignosulfonate, 3 parts by mass of agricultural milk 500#, 7 parts by mass of agricultural milk 600# melted and 58.9 parts by mass of deionized water are completely mixed in the reactor;

[0037] 4) After passing ...

Embodiment 2

[0043] Embodiment 2, cerium-doped nano-TiO 2 Photocatalytic Degradation Test of Carbofuran by Suspoemulsion

[0044] Under greenhouse conditions, with the sun as the light source, nano-TiO doped with different amounts of cerium 2 pair 1.5×10 -4 The photocatalytic degradation test results of mol / L carbofuran solution are shown in Table 1. After reacting 4h, the cerium-doped nano-TiO prepared by embodiment 1 2 The effect of suspoemulsion on the photocatalytic degradation of carbofuran is significantly better than that of cerium-doped nano-TiO 2 The degradation effect of raw powder is high. 0.5% cerium-doped nano-TiO due to processing into suspoemulsion 2 The photocatalytic degradation effect on the pesticide carbofuran is increased by 4.6%-18.4%. Among them, 0.5% cerium doped nano-TiO 2 When the dosage is 0.2g / L, the disappearance rate of carbofuran is the largest, which is 59.1%.

[0045] Table 1 Ce-TiO 2 Photocatalytic degradation effect on carbofuran (%)

[0046] ...

Embodiment 3

[0047] Embodiment 3, preparation 20% lanthanum doped nano TiO 2 suspoemulsion

[0048] Rare earth doped nano TiO 2 The suspoemulsion is composed of the following substances in mass percentage: 20% rare earth lanthanum doped nano-TiO 2 (1% La 3+ -TiO 2 ), 4% sodium lignosulfonate, 3% agricultural milk 500#, 7% agricultural milk 600#, 5% ethylene glycol, 0.1% xanthan gum, 0.1% octanol, and the balance is deionized water.

[0049] The preparation method is the same as in Example 1.

[0050] The obtained suspoemulsion has good dispersibility, light yellow color, good stability and no stratification.

[0051] The suspension rate of the suspoemulsion was measured to be 100.2%. Both cold storage and heat storage are qualified.

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Abstract

The invention discloses a rare earth doped nanometer titanium dioxide suspension emulsion and a preparation method thereof. The suspension emulsion comprises the following substances by mass: 20% of rare earth doped nanometer TiO2, 2-6% of wetting dispersants, 7-14% of emulsifiers, 3-8% of antifreezing agents, 0.1-0.5% of thickening agents, 0.1-0.5% of antifoaming agents, and 35-70% of water. The invention overcomes the disadvantage of easy layering of rare earth doped nanometer TiO2 in water; with the addition of the additive system, the rare earth doped nanometer TiO2 can not only disperse uniformly in water, but also adsorb on plant surfaces or soil surface layers more uniformly and for a longer time, and thus the degradation effect on pesticides is improved. Materials required by the invention are cheap and easily available, have good adhesiveness and low drift, contain no organic solvents, and are convenient for storage and transport.

Description

technical field [0001] The invention relates to a rare earth-doped nano-titanium dioxide suspoemulsion and a preparation method thereof. Background technique [0002] In recent years, my country's pesticide production has developed rapidly, and the variety and quantity of pesticide products have increased rapidly. At present, there are more than 2,000 pesticide companies in my country, and more than 1,300 manufacturers of preparations. In 2007, the domestic production of pesticides (active ingredients) reached 1.73 million tons, and the export of pesticides was nearly 480,000 tons. It has surpassed the United States to become the world's largest pesticide producer. Due to the characteristics of high efficiency, rapidity and ease of use, pesticides occupy a very important position in the integrated pest management system. For every 1 yuan of pesticide used, agriculture can benefit 8 to 16 yuan. According to statistics, the use of pesticides can restore 35% of crop losses on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/32A01N25/30
Inventor 慕康国王敬国燕红芳王琰汪东曾睿
Owner CHINA AGRI UNIV
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