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Preparation method of composite titanium dioxide photocatalyst activated carbon based on g-carbon nitride

A titanium dioxide and carbon nitride technology, applied in chemical instruments and methods, physical/chemical process catalysts, other chemical processes, etc., can solve the problems of difficult to control the manufacturing process, high production cost, low activated carbon activity, etc. The effect of uniform reactivity, efficient adsorption of pollutants, and improved capture capacity

Active Publication Date: 2015-05-06
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, further studies have shown that the activity of the activated carbon of the above-mentioned composite titanium dioxide is often low, and its manufacturing process has defects such as difficult control and high production cost; especially, its TiO 2 The photoactive range of the particles is limited to ultraviolet light and cannot be extended to visible light

Method used

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  • Preparation method of composite titanium dioxide photocatalyst activated carbon based on g-carbon nitride
  • Preparation method of composite titanium dioxide photocatalyst activated carbon based on g-carbon nitride
  • Preparation method of composite titanium dioxide photocatalyst activated carbon based on g-carbon nitride

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Effect test

Embodiment 1

[0023] Dissolve tetrabutyl titanate in ethanol as a solute, stir evenly at room temperature, transfer the reaction solution to a 100 ml Teflon reaction bottle, and then add 0.3 g of g-carbon nitride particles per 100 ml of solution Add by way of adding, and after stirring evenly, obtain mixed solution, this g-carbon nitride particles can be made, for example, by thermal condensation polymerization, melamine thermal condensation, and its average particle diameter is preferably about 5 nanometers;

[0024] Next, put the Teflon reaction bottle into the stainless steel jacket, tighten the stainless steel cover, place it in the heating box, set the heating temperature to 210°C, and the reaction time is 210 minutes. After the reaction is over, let the reaction kettle cool down naturally. At room temperature, the reaction product was collected by centrifugation, washed three times with ethanol, and the obtained powder was dried in an oven at 60 degrees for 30 minutes to obtain titaniu...

Embodiment 2

[0027] Dissolve tetrabutyl titanate in ethanol as a solute, stir evenly at room temperature, transfer the reaction solution to a 100 ml Teflon reaction bottle, and then add 0.35 g of g-carbon nitride particles per 100 ml of solution Add by way of adding, and after stirring evenly, obtain mixed solution, this g-carbon nitride particles can be made, for example, by thermal condensation polymerization, melamine thermal condensation, and its average particle diameter is preferably about 5 nanometers;

[0028] Next, put the Teflon reaction bottle into the stainless steel jacket, tighten the stainless steel cover, place it in the heating box, set the heating temperature to 180°C, and the reaction time is 240 minutes. After the reaction is over, let the reaction kettle cool down naturally. At room temperature, the reaction product was collected by centrifugation, washed three times with ethanol, and the obtained powder was dried in an oven at 55 degrees for 60 minutes to obtain titani...

Embodiment 3

[0031] Dissolve tetrabutyl titanate in ethanol as a solute, stir evenly at room temperature, transfer the reaction solution to a 100 ml Teflon reaction bottle, and then add 0.4 g of g-carbon nitride particles per 100 ml of solution Add by way of adding, and after stirring evenly, obtain mixed solution, this g-carbon nitride particles can be made, for example, by thermal condensation polymerization, melamine thermal condensation, and its average particle diameter is preferably about 6 nanometers;

[0032] Next, put the Teflon reaction bottle into the stainless steel jacket, tighten the stainless steel cover, place it in the heating box, set the heating temperature to 240°C, and the reaction time is 120 minutes. After the reaction is over, let the reaction kettle cool down naturally. At room temperature, the reaction product was collected by centrifugation, washed three times with ethanol, and the obtained powder was dried in an oven at 55 degrees for 60 minutes to obtain titaniu...

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Abstract

The invention discloses a preparation method of composite titanium dioxide photocatalyst activated carbon based on g-carbon nitride. The preparation method comprises the following steps: (a) adding g-carbon nitride particles to the solution of a titanate and an alcohol, and stirring evenly to obtain a mixed solution; (b) putting the mixed solution into a high-pressure kettle for reacting, and then naturally cooling until a room temperature and collecting a reaction production, thereby obtaining g-carbon nitride particle supported titanium dioxide particles; (c) dispersing the composite titanium dioxide particles in deionized water and preparing an emulsion, and then soaking coconut shell activated carbon in the emulsion, and shaking and drying to obtain the titanium dioxide photocatalyst activated carbon having a visible light response characteristic. According to the preparation method, the prepared titanium dioxide particles have the visible light response characteristic and the mean particle size of 5-7 nanometers; besides, the activity of the particles is improved remarkably, and the particles are capable of adsorbing pollutants more efficiently and thoroughly; meanwhile, the preparation method has the characteristics of convenient operation and control, low production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and more specifically relates to a preparation method of titanium dioxide photocatalyst activated carbon based on g-carbon nitride composite. Background technique [0002] Activated carbon is widely used in the field of air purification because of its porous structure on the surface, which can adsorb a large amount of organic matter. However, the adsorption capacity of traditional activated carbon is limited, and the adsorption efficiency will decrease as the adsorption time increases. Once the adsorption of activated carbon reaches saturation, it is necessary to replace the activated carbon or perform desorption treatment on the activated carbon, which not only affects the adsorption effect of activated carbon on harmful gases, but also Excessively high replacement frequency increases the cost of use and affects industrial production. What's more serious is that the pollutants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J20/20B01J20/30
Inventor 张延荣廖文娟王乃石
Owner HUAZHONG UNIV OF SCI & TECH
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