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Preparation method of silver/titanium dioxide compound

A titanium dioxide and composite technology, which is applied in the field of preparation of silver/titanium dioxide composites, can solve the problems of difficult large-scale industrial production, cumbersome preparation process, unfavorable popularization and application, etc., and achieves improved photocatalytic activity, simple operation, and large specific surface area. Effect

Active Publication Date: 2010-04-14
安庆市观成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This preparation method is unfavorable for the popularization and application of this product because of the defects of cumbersome preparation process, relatively high cost and difficulty in large-scale industrial production.

Method used

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  • Preparation method of silver/titanium dioxide compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take by weighing 16 milligrams of nano-silver and put it into a 100 milliliter small beaker, add a molar concentration of 10 -4 20 ml of anhydrous ethanol solution of M polyvinylpyrrolidone k30, placed in an ultrasonic cell pulverizer, ultrasonically treated for 10 minutes under the condition of ultrasonic power of 500W, placed on a magnetic stirrer, and 6 ml of titanium was slowly added during the stirring process Acetate butyl ester, get 26 milliliters of mixed liquids, then slowly add dropwise with absolute ethanol, deionized water in the ratio of 1:1 and mix fully with nitric acid to become 8 milliliters of mixed solutions that pH value is 2 under the situation of stirring, Stir at 40°C for 2 hours, put it in a drying oven and dry at 80°C for 24 hours, then put it into a horse-shaped furnace and bake at 400°C for 10 hours to obtain about 1.4 grams of silver / titanium dioxide composite.

[0017] Determination results: The prepared silver / titanium dioxide composite was...

Embodiment 2

[0019] Take by weighing 16 milligrams of nano-silver and put it into a 100-milliliter beaker, and add it with a molar concentration of 10 in the beaker. -3 40 ml of ethanol solution of M polyvinylpyrrolidone k30, placed in an ultrasonic cell pulverizer and ultrasonically treated for 50 minutes under the condition of ultrasonic power of 100W, then placed on a magnetic stirrer, slowly added 4 ml of titanic acid during heating and stirring butyl ester, to obtain 44 milliliters of mixed liquid, then add absolute ethanol and deionized water to mix thoroughly in a ratio of 1:1 and adjust to 10 milliliters of mixed solution with pH value of 2 with nitric acid, stir at 80°C for 1 hour, put Dry it in a drying oven at 120°C for 10 hours, and then put it into a horse-radiation furnace and bake it at a high temperature of 700°C for 2 hours to obtain about 1.0 g of silver / titanium dioxide composite.

[0020] Determination results: The prepared silver / titanium dioxide composite was analyzed...

Embodiment 3

[0022] Take by weighing 30 mg of nano-silver and put it into a 100 ml small beaker, add a molar concentration of 10 to the small beaker -3 19 milliliters of ethanol solution of M polyvinylpyrrolidone k30 was placed on a magnetic stirrer and stirred vigorously for 30 minutes, then, 6 milliliters of butyl titanate was slowly added during the stirring process to obtain 25 milliliters of mixed liquid, and then absolute ethanol, Mix deionized water thoroughly at a ratio of 1:1 and adjust to 10 ml of a mixed solution with a pH value of 3 with nitric acid, stir at 60°C for 1.5 hours, put it in a drying oven and dry it at 90°C for 20 hours, and then put it in Roasting at 500°C for 4 hours in a Mafu furnace can yield about 1.4 grams of silver / titanium dioxide composite.

[0023] Determination results: The prepared silver / titanium dioxide composite was analyzed by Japan Shimadzu-6000X-ray diffractometer to analyze the silver / titanium dioxide composite crystal form, and the Japanese Hita...

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Abstract

The invention discloses a preparation method of a silver / titanium dioxide compound, comprising the following steps: firstly, fully mixing nanometer silver, polyvinylpyrrolidone k30 and absolute alcohol and conducting high dispersing treatment, thus obtaining relative stable nanometer silver / alcohol suspending liquid; secondly, slowly dropping tetrabutyl titanate into the nanometer silver / alcohol suspending liquid under the condition of stirring, then slowly dropping mixed solution with PH value of 1-3 and prepared from absolute alcohol, deionized water and nitric acid, and then continuing stirring for 1-2 hours after the dropping is finished, thus obtaining silver / titanium dioxide sol; and thirdly, removing organic matter and water from the silver / titanium dioxide sol, thus obtaining the silver / titanium dioxide compound. The preparation method solves the problems such as rigmarole processes, relative high cost, difficulty in large-scale production and the like, and has the advantages of low cost, simple operation and applicability to industrialized production.

Description

(1) Technical field: [0001] The invention relates to a preparation method of an inorganic compound, in particular to a preparation method of a silver / titanium dioxide compound. (two) background technology: [0002] Nano-titanium dioxide can excite electron-hole pairs under light irradiation, and electron-holes have redox properties, which makes nano-titanium dioxide have better catalytic performance, but electron-hole pairs are easy to recombine, which affects the catalytic activity of nano-titanium dioxide. Thus limiting its practical application. In recent years, people have attempted to red-shift the absorption wave range of the titanium dioxide composite photocatalyst by doping precious metals such as gold and silver, and at the same time strengthen the separation of electrons and holes, improve the performance of semiconductor materials such as titanium dioxide, and expand their optical properties. Response range and improving photocatalytic efficiency are one of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J21/06
Inventor 徐志兵钮志远
Owner 安庆市观成科技有限公司
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