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Visible light photocatalyst and preparation method therefor

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as energy storage function of long afterglow materials, etc. Achieve the effects of low cost, simple preparation method and high organic matter removal rate

Inactive Publication Date: 2014-03-12
上海纳晶科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Patent 3 does not mention the energy storage function of long afterglow materials
At present, in the field of visible light catalysis, there has been no report on using the down-conversion function of luminescent materials to improve the performance of visible light catalysis.

Method used

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  • Visible light photocatalyst and preparation method therefor
  • Visible light photocatalyst and preparation method therefor
  • Visible light photocatalyst and preparation method therefor

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preparation example Construction

[0035] A preparation method of visible light photocatalyst, is characterized in that, described preparation method comprises the following steps:

[0036] (1) According to the proportioning of claim 1, weighing the down conversion material and / or modified material; (2) Adding the weighed material into 10-20 ml of 0.05-0.2 mol / l salt solution, Put the solution into a 35 ml microwave tube and stir at 25-35°C for 0.5-1 hour to make the solution uniform; (3) Add Na(OH) dropwise 2Solution, so that the pH value of the solution is between 7-9, and stirred at room temperature 25-35 ° C for 0.5-1 hour; (4) Put the stirred solution into a microwave reaction synthesizer, at a temperature of 110-160 ° C and power Under the condition of 80-150 W, the composite photocatalyst is obtained after reacting for 10-30 minutes.

Embodiment 1

[0038] Use Y 3 Al 5 o 12 : Ce 3+ Composite visible light catalyst with ZnO.

[0039] 1) Preparation of photocatalyst

[0040] Weigh the down conversion material Y with a mass ratio of 0.5%, 1%, 3% and 5% to the semiconductor material, respectively 3 Al 5 o 12 : Ce 3+ , the weighed Y 3 Al 5 o 12 : Ce 3 were added to 20 ml of 0.1 mol / l ZnSO 4 solution, put the solution into a 35 ml microwave tube, and stir at room temperature for half an hour to make the solution uniform. Then add Na(OH) dropwise 2 solution, so that the pH of the solution = 9, stirred at room temperature for 1 hour, and then placed in a microwave reaction synthesizer, at a temperature of 150 o Under the conditions of C and power 100 W, four kinds of ZnO-Y were obtained after 10 minutes of reaction 3 Al 5 o 12 : Ce 3+ composite photocatalyst. Will Y 3 Al 5 o 12 : Ce 3+ The composite photocatalysts whose mass ratio with ZnO is 0.5%, 1%, 3% and 5% are named as ZY-0.5, ZY-1, ZY-3 and ZY-5, res...

Embodiment 2

[0045] Use Y 2 o 2 S:Eu 2+ Composite visible light catalyst with ZnO.

[0046] 1) Preparation of photocatalyst

[0047] Weigh the down-conversion material Y with a mass ratio of 0.25%, 0.5% and 1% to the semiconductor material, respectively 2 o 2 S:Eu 2+ , the weighed Y 2 o 2 S:Eu 2+ were added to 20 ml of 0.1 mol / l ZnSO 4 solution, put the solution into a 35 ml microwave tube, and stir at room temperature for half an hour to make the solution uniform. Then add Na(OH) dropwise 2 solution, so that the pH of the solution = 9, stirred at room temperature for 1 hour, and then placed in a microwave reaction synthesizer, at a temperature of 150 o Under the conditions of C and power 100 W, ZnO-Y was obtained after 10 minutes of reaction 2 o 2 S:Eu 2+ composite photocatalyst. Will Y 2 o 2 S:Eu 2+ The composite photocatalysts whose mass ratio with ZnO is 0.25%, 0.5% and 1% are named as ZY-0.25-0, ZY-0.5-0 and ZY-1-0, respectively.

[0048] 2) Photocatalysis experime...

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Abstract

Provided is a visible light photocatalyst and a preparation method therefor. The visible light photocatalyst comprises down conversion materials and semiconductor materials. The mass percent of the down conversion materials to the semiconductor materials is 0.5%-5%. The visible light photocatalyst with down conversion functions is advantaged by high visible light catalytic degradation rate, no pollution, simple preparation method and low cost. The invention also provides a preparation method for the visible light photocatalyst with down conversion functions.

Description

technical field [0001] The invention relates to a visible light photocatalyst, in particular to a visible light photocatalyst with a down conversion function and a preparation method thereof. Background technique [0002] With the development of industry and the increasingly prominent environmental problems, it is an urgent and urgent task to find ways to effectively remove organic pollutants, which has attracted great attention from governments and people in various countries. As a new type of environmental purification and energy conversion technology, semiconductor photocatalysis technology has shown broad application prospects in the fields of hydrogen production, water treatment, degradation of various organic substances, and air purification. This technology has the following advantages: it can react directly under light, and can effectively destroy many structurally stable biorefractory organic pollutants, degrading them into carbon dioxide and water, etc.; strong oxi...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J27/02B01J27/24B01J27/192B01J23/18C02F1/30
Inventor 孙卓潘丽坤刘心娟
Owner 上海纳晶科技有限公司
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