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Preparation method of boron-nitrogen doped titanium dioxide photocatalyst

A technology of titanium dioxide and photocatalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complicated preparation methods, low catalyst activity, high energy consumption, etc., and achieve improved photocatalytic activity and photon utilization efficiency, easy control of reaction conditions, and simple steps

Pending Publication Date: 2020-07-28
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a preparation method of boron nitrogen doped titanium dioxide photocatalyst, which is used to solve the problem of complex operation, high energy consumption, and the catalyst produced by the preparation method in the prior art. Low activity, poor control of boron and nitrogen doping content, etc.

Method used

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  • Preparation method of boron-nitrogen doped titanium dioxide photocatalyst
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  • Preparation method of boron-nitrogen doped titanium dioxide photocatalyst

Examples

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Embodiment 1

[0034] A preparation method of boron nitrogen doped titanium dioxide photocatalyst, the steps are as follows:

[0035] (1) Under the condition of dry air all the time, take 4.0ml tetra-n-butyl titanate Ti(OBu) under an inert atmosphere or in a glove box 4 Dissolve in 20ml absolute ethanol to form solution A.

[0036] (2) Dissolve 0.2 g of urea and 0.1 g of boric acid in 8 ml of absolute ethanol to form solution B.

[0037] (3) Under the condition of vigorously stirring the solution A, add the solution B dropwise to the solution A.

[0038] (4) Put the mixed solution in a fume hood, ignite it, and carry out the combustion reaction.

[0039] (5) The obtained powder was calcined in a muffle furnace at a temperature of 200° C. for 5 hours to obtain boron nitrogen doped titanium dioxide.

Embodiment 2

[0041] A preparation method of boron nitrogen doped titanium dioxide photocatalyst, the steps are as follows:

[0042] (1) Under the condition of dry air all the time, take 4.0ml tetra-n-butyl titanate Ti(OBu) under an inert atmosphere or in a glove box 4 Dissolve in 20ml absolute ethanol to form solution A.

[0043] (2) Dissolve 0.2 g of urea and 0.1 g of boric acid in 8 ml of absolute ethanol to form solution B.

[0044] (3) Under the condition of vigorously stirring the solution A, add the solution B dropwise to the solution A.

[0045] (4) Put the mixed solution in a fume hood, ignite it, and carry out the combustion reaction.

[0046] (5) The obtained powder was calcined in a muffle furnace at a temperature of 600° C. for 3 hours to obtain boron-nitrogen-doped titanium dioxide.

Embodiment 3

[0048] A preparation method of boron nitrogen doped titanium dioxide photocatalyst, the steps are as follows:

[0049] (1) Under the condition of dry air all the time, take 4.0ml of n-propyl titanate C in an inert atmosphere or in a glove box 12 h 28 o 4 Ti was dissolved in 20 ml absolute ethanol to form solution A.

[0050] (2) Dissolve 0.2 g of urea and 0.1 g of boric acid in 8 ml of absolute ethanol to form solution B.

[0051] (3) Under the condition of vigorously stirring the solution A, add the solution B dropwise to the solution A.

[0052] (4) Put the mixed solution in a fume hood, ignite it, and carry out the combustion reaction.

[0053] (5) directly cooling the powder obtained in step (4) to obtain boron nitrogen doped titanium dioxide.

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Abstract

The invention belongs to the technical field of preparation of photocatalytic materials, and particularly discloses a preparation method of boron-nitrogen doped titanium dioxide, which comprises the following steps dissolving titanium tetrachloride or titanate in a solvent to form a solution A, dissolving urea and / or ammonia water and boric acid in a solvent to form a solution B, stirring the solution A at a high speed, dropwise adding the solution B into the solution A, fully combusting the mixed solution in air to obtain powder, and directly cooling or roasting the powder to obtain the boron-nitrogen doped titanium dioxide photocatalyst. Under conditions of air and a room temperature, the mixed boron-nitrogen-doped titanium dioxide precursor is combusted to prepare the boron-nitrogen-doped titanium dioxide catalyst, no complex technological process or equipment is needed in the preparation process, meanwhile, heteroions are prevented from being introduced in the multi-step operationprocess, and then the photocatalytic activity and the light quantum utilization efficiency of the photocatalyst are improved. The method is simple in step, reaction conditions are easy to control, andthe method can be applied to industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of photocatalytic material preparation, in particular to a preparation method of boron nitrogen doped titanium dioxide photocatalyst. Background technique [0002] Titanium dioxide is a good photocatalyst, which can be used in the redox reaction of various organic substances, and plays an important catalytic role in the treatment of environmental pollutants; it has an important catalytic role in the preparation of fuel by photodecomposition, especially for alcohols such as methanol Photodecomposition to prepare pure fuels such as hydrogen has an important catalytic ability; titanium dioxide has a good bactericidal effect, and can absorb ultraviolet rays to oxidize and decompose bacterial cell membranes. [0003] In the process of photocatalysis, pure titanium dioxide is used as a catalyst. Due to the large gap between the valence band and the conduction band of titanium dioxide, ultraviolet light can only be...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/40C02F2305/10B01J35/39
Inventor 崔月华张向华兰晓松刘潇钟育其刘明
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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