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Preparation method of visible-light response carbon-doped nano-titanium dioxide catalyst

A technology of nano-titanium dioxide and visible light, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of difficult control of hydrolysis speed, high cost of large-scale production, and harsh reaction conditions and other issues to achieve cost and time savings, simple equipment, and good dispersion

Active Publication Date: 2016-02-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] China's invention patent (CN101385968A) discloses a preparation method of photocatalytic active carbon doped titanium dioxide nanomaterials, which specifically includes dissolving titanium organic compounds in water to obtain white precipitates, and then calcining them under anoxic conditions to obtain products. This method directly dissolves the organic compound of titanium in water, and the reaction is not complete enough. It is difficult to control the hydrolysis rate of directly dissolving titanate in water, and the calcination needs to be under anoxic condition, and the reaction conditions are harsh.
Chinese invention patent (CN1857769A) discloses a preparation method of carbon-doped mesoporous titanium dioxide visible light photocatalyst, using titanium compound and alcohol solution as the titanium source, and sugar as the carbon source, so this method requires an external carbon source, and the reaction method is compared Complex, easy to bring in other impurities, large-scale production costs are relatively high

Method used

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  • Preparation method of visible-light response carbon-doped nano-titanium dioxide catalyst
  • Preparation method of visible-light response carbon-doped nano-titanium dioxide catalyst
  • Preparation method of visible-light response carbon-doped nano-titanium dioxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Measure 10ml of tetrabutyl titanate, dissolve it in 50ml of absolute ethanol, and stir to obtain A solution;

[0041] (2) Measure the ammoniacal liquor of 10ml and mix with 50ml ethanol to obtain B solution;

[0042] (3) Add solution B dropwise to solution A, stir for 30 minutes, and then react in a water bath at 60°C for 24 hours. After rapid hydrolysis of butyl titanate, a white gel is obtained at a rate of 8 drops per second.

[0043] (4) Put the white gel into a drying oven, dry it at 80°C for 12 hours, and then grind it into powder;

[0044] (5) The powder obtained is washed three times with ethanol and deionized water respectively;

[0045] (6) Dry the washed solution at 80°C for 12 hours;

[0046] (7) The above powder was calcined in a muffle furnace at 250° C. for 2 hours to obtain a carbon-doped mesoporous titanium dioxide visible light catalyst.

[0047] The product obtained by the reaction of step (7) is characterized by its structure and crystal form ...

Embodiment 2

[0050] (1) Measure 10ml of tetrabutyl titanate, dissolve it in 50ml of absolute ethanol, and stir to obtain A solution;

[0051] (2) Measure the ammoniacal liquor of 10ml and mix with 25ml ethanol to obtain B solution;

[0052] (3) Add solution B dropwise to solution A, stir for 30 minutes, and then react in a water bath at 60°C for 12 hours. The butyl titanate is rapidly hydrolyzed to obtain a white gel at a rate of 5 drops per second.

[0053] (4) Put the white gel into a drying oven, dry it at 80°C for 12 hours, and then grind it into powder;

[0054] (5) The powder obtained is washed three times with ethanol and deionized water respectively;

[0055] (6) Dry the washed solution at 80°C for 12 hours;

[0056] (7) The above powder was calcined in a muffle furnace at 350° C. for 2 hours to obtain a carbon-doped mesoporous titanium dioxide visible light catalyst.

[0057] The product obtained by the reaction of step (7) is characterized by its structure and crystal form by ...

Embodiment 3

[0061] (1) Measure 10ml of tetrabutyl titanate, dissolve it in 100ml of absolute ethanol, and stir evenly to obtain A solution;

[0062] (2) Measure the ammoniacal liquor of 10ml and mix with 25ml ethanol to obtain B solution;

[0063] (3) Add solution B dropwise to solution A and stir for 30 minutes, then react in a water bath at 60°C for 6 hours, and the butyl titanate will be rapidly hydrolyzed to obtain a white gel at a rate of 5 drops per second.

[0064] (4) Put the white gel into a drying oven, dry it at 80°C for 12 hours, and then grind it into powder;

[0065] (5) Wash the powder obtained six times with ethanol and deionized water respectively;

[0066] (6) Dry the washed solution at 80°C for 12 hours;

[0067] (7) The above powder was calcined in a muffle furnace at 450° C. for 2 hours to obtain a carbon-doped mesoporous titanium dioxide visible light catalyst.

[0068] The product obtained by the reaction of step (7) is characterized by its structure and crystal ...

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Abstract

The invention discloses a preparation method of a visible-light response carbon-doped nano-titanium dioxide catalyst. The preparation method includes the following steps: dissolving a titanium-containing compound in an alcohol solution to obtain a solution A; mixing an alkali solution with an alcohol solution to obtain a solution B; dropwise adding the solution B to the solution A, stirring for 30-60 min, and then carrying out a reaction for 6-24 h at the temperature of 50-70 DEG C, to obtain a white gel; and drying the obtained white gel for 10-24 h at the temperature of 80-120 DEG C, grinding into a powder, washing the powder with an alcohol solution or deionized water, then drying, calcining the obtained powder with the calcination temperature of 200-600 DEG C and the time of 1-10 h, and thus obtaining the carbon-doped titanium dioxide visible light catalyst. Raw materials used in the preparation method have no need of precious metals, has no need of aging, has no additional addition of a carbon source and no addition of water, the cost and time are saved, the preparation technology is simple, and the requirements on equipment are not high.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide visible light catalyst, in particular to a preparation method of a visible light responsive carbon-doped nano titanium dioxide catalyst, which can be applied to photocatalytically degrade organic pollutants under visible light. Background technique [0002] With the development of society and the continuous improvement of people's living standards, the excessive use of fossil energy for human survival has led to a series of serious environmental pollution problems such as greenhouse effect, air pollution, soil pollution, water pollution, etc. destroy the ecological environment of the earth. In addition to causing direct damage and impact on the ecological system, the accumulation, migration and transformation of pollutants will also cause various derivative environmental effects, causing indirect and more serious harm to the ecological system and human society. The use of photocatalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J21/06B01J35/10C02F1/30B82Y30/00B82Y40/00
Inventor 诸葛飞卜彦强李振超梁凌燕曹鸿涛吴爱国曾乐勇沈折玉徐裕
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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