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Method for preparing tin reduced nano titanic oxide catalyst

A nano-titanium dioxide and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult industrialization, complex process conditions, and long time consumption, and achieve significant photocatalytic activity. Improved separation efficiency and low production cost

Inactive Publication Date: 2009-08-05
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogen reduction method is complicated, has unsafe factors such as inflammability and explosion, and is time-consuming and expensive.
However, the hydrogen plasma reduction method has disadvantages such as high equipment investment cost, high energy consumption, and complicated process conditions, and it is difficult to realize industrialization, which limits the application of these two modification methods.

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  • Method for preparing tin reduced nano titanic oxide catalyst
  • Method for preparing tin reduced nano titanic oxide catalyst
  • Method for preparing tin reduced nano titanic oxide catalyst

Examples

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Embodiment 1

[0020] The preparation method of tin-reduced nano-titanium dioxide catalyst comprises: weighing 1-100 parts of nano-titanium dioxide powder according to the ratio of parts by weight, adding the nano-titanium dioxide powder into the solution of stannous dichloride at room temperature, dipping After 1-60 minutes, filter with suction, wash with water three times, and dry to obtain a tin-reduced nano-titanium dioxide catalyst. The reduction method used is the chemical reduction method of divalent tin.

[0021] In the preparation method of the tin-reduced nano-titanium dioxide catalyst, the nano-titanium dioxide powder is composed of one or more of anatase phase, rutile phase, and brookite phase, and the weight of the nano-titanium dioxide powder is 1-100 g / L.

[0022] In the preparation method of the tin-reduced nano-titanium dioxide catalyst, the concentration of the stannous dichloride solution is 0.1-5mol / L, the volume fraction of the stannous dichloride solution is 0.1-1 part,...

Embodiment 2

[0024] Nano titanium dioxide powder was prepared by sol-gel method. Add 10mL of ethanol to a beaker, then slowly drop 7.6mL of tetrabutyl titanate into the ethanol under vigorous stirring, the above mixed solution is electromagnetically stirred for 2 hours, then add 1-5mL of double distilled water and continue to stir until a gel is formed . The gel is dried at 100°C and calcined at 400°C to obtain anatase phase nano titanium dioxide powder with a particle size of 10-30nm.

[0025] Prepare a tin protochloride solution with a concentration of 0.1-5 mol / L, weigh 1.0 g of the above-prepared nano-titanium dioxide powder and add it to 50 mL of a stannous chloride solution with a concentration of 0.1-5 mol / L and immerse it for 1-60 minutes, then Suction filter and wash three times with distilled water. Then transfer to a Petri dish and dry at 100°C for 2 hours. Take out and grind to obtain a series of Sn-reduced nano titanium dioxide powders. Respectively named: Sn-TiO 2 -A-B, ...

Embodiment 3

[0030]Nano titanium dioxide powder was prepared by hydrothermal method. Take a dropping funnel and add 30mL of tetrabutyl titanate and 4mL of isopropanol respectively, and mix well. Take a 250mL three-necked bottle and add 120mL of secondary water, add 2mL of nitric acid to adjust the pH to about 1, and use an ice-water cooling bath to control the reaction temperature below 5°C. The solution of tetrabutyl titanate and isopropanol was slowly added dropwise into the three-neck flask under electric stirring (the dropping time takes about 1 hour, and the whole process is completed in an ice-water bath). After the dropwise addition was completed, the temperature was raised to reflux for 2 hours. After the reflux is completed, cool to room temperature and separate layers, use a separatory funnel to remove the milky white liquid in the lower layer, adjust the pH value to 3-12 with ammonia water, then add it to a hydrothermal kettle for 2-48 hours at 180°C for hydrothermal reaction, ...

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Abstract

The invention provides a method for preparing a tin reduced nanometer titanium dioxide catalyst. The prior hydrogen reduction method has the deficiencies of complex process, long time consumption and high cost, and is difficult to realize industrialization. The method for preparing the tin reduced nanometer titanium dioxide catalyst comprises the following steps: weighing 1 to 100 portions of nanometer titanium dioxide powder according to a ratio in portion by weight; adding the nanometer titanium dioxide powder into a stannous chloride solution at room temperature to be immersed for 1 to 60 minutes; pumping and filtering the mixed solution; washing the filtrate by water for three times; and drying the filtrate to obtain the tin reduced nanometer titanium dioxide catalyst. The method can be used for preparing the tin reduced nanometer titanium dioxide catalyst.

Description

Technical field: [0001] The invention relates to a preparation method of a tin-reduced nano titanium dioxide catalyst. Background technique: [0002] With the development of environmental protection technology and the continuous improvement of people's requirements for environmental quality, highly active photocatalytic materials have become the most eye-catching new technology for treating water and air pollution. At present, the catalysts used in photocatalytic technology are mostly N-type semiconductor materials, such as TiO 2 , ZnO, CdS, WO 3 , SnO 2 , Fe 2 o 3 Wait. Among many semiconductor photocatalysts, TiO 2 It has attracted much attention because of its high catalytic activity, good stability, low price and non-toxicity. In addition to its applications in water and air purification, TiO 2 In sterilization, photolysis of water, nitrogen fixation, CO 2 Reduction and other aspects of the research has also made some progress. However, at present, the influenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/135
Inventor 辛柏福付宏刚丁丹丹
Owner HEILONGJIANG UNIV
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