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Nano-scale high quantum conversion photocatalyst and preparation process thereof

A technology of photocatalyst and preparation process, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, heterogeneous catalyst chemical element, etc., can solve the problem of low quantum conversion efficiency and low utilization rate of visible light , Narrow photoresponse range, etc., to achieve the effect of improving quantum conversion rate, reducing energy consumption, and being applicable to a wide range of environments

Inactive Publication Date: 2019-09-13
浙江森井生物技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing photocatalysts have a narrow photoresponse range (<380nm), low quantum conversion efficiency (≤30%), low utilization rate of visible light, and waste of energy consumption, which are currently the main problems that plague the development of domestic photocatalytic oxidation technology.

Method used

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Examples

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Effect test

Embodiment 1

[0024] A nanoscale photocatalyst with high quantum conversion rate, the photocatalyst has a particle size of ≤10nm and a specific surface area of ​​400m 2 , the light excitation range includes the ultraviolet light region (<380nm) and the visible light region (400-600nm), processed from the following raw materials according to the mass percentage: 10% tetrabutyl titanate, 0.05% platinum nitrate, 0.05% iron nitrate , 0.05% silver nitrate, the balance is absolute ethanol, and the sum of the raw materials is 100%.

[0025] In this embodiment, the purity of platinum nitrate, iron nitrate and silver nitrate is 99.99%.

[0026] The preparation technology of the nanoscale high quantum conversion rate photocatalyst of embodiment 1 comprises the following steps:

[0027] Step S1, firstly mix tetrabutyl titanate with absolute ethanol to form A liquid;

[0028] Step S2, prepare 0.05M ammonia water, heat to 65°C to form B liquid;

[0029] Step S3, heating liquid A in step S1 to 65°C, s...

Embodiment 2

[0036] A nanoscale photocatalyst with high quantum conversion rate, the photocatalyst has a particle size of ≤10nm and a specific surface area of ​​400m 2 , the optical excitation range includes the ultraviolet light region (<380nm) and the visible light region (400-600nm), processed by the following raw materials according to the mass percentage: 15% tetrabutyl titanate, 0.1% potassium chloroplatinate, 0.1% Ferric hydroxide, 0.1% silver chloride, the balance is dehydrated alcohol, the sum of raw materials is 100%.

[0037] In this embodiment, the purity of potassium chloroplatinate, ferric hydroxide and silver chloride is 99.99%.

[0038] The preparation technology of the nanoscale high quantum conversion rate photocatalyst of embodiment 2 comprises the following steps:

[0039] Step S1, firstly mix n-butyl titanate and absolute ethanol in the formulated amount to form liquid A;

[0040] Step S2, prepare 0.05M ammonia water, heat to 70°C to form B liquid;

[0041] Step S3,...

Embodiment 3

[0048] A nanoscale photocatalyst with high quantum conversion rate, the photocatalyst has a particle size of ≤10nm and a specific surface area of ​​400m 2 , the light excitation range includes ultraviolet light region (<380nm) and visible light region (400-600nm), processed by the following raw materials according to the mass percentage: 12% tetrabutyl titanate, 0.075% platinum nitrate, 0.075% iron nitrate , 0.075% silver nitrate, the balance is absolute ethanol.

[0049] Specifically, the purity of platinum nitrate, iron nitrate and silver nitrate is 99.999%.

[0050] The preparation technology of the nanoscale high quantum conversion rate photocatalyst of embodiment 3 comprises the following steps:

[0051] Step S1, firstly mix n-butyl titanate and absolute ethanol in the formulated amount to form liquid A;

[0052] Step S2, prepare 0.05M ammonia water and heat to 60°C to form liquid B;

[0053] Step S3, heating liquid A in step S1 to 60°C, slowly adding it into liquid B,...

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Abstract

The invention relates to the processing technology of photocatalysts, in particular to a nano-scale high quantum conversion photocatalyst and a preparation process thereof. The nano-scale high quantumconversion photocatalyst is processed from the following raw materials by mass percentage: 10-15% of tetrabutyl titanate, 0.05-0.1% of platinum nitrate or potassium chloroplatinate, 0.05-0.1% of ironnitrate or ferric hydroxide, 0.05-0.1% of silver nitrate or silver chloride, and the balance anhydrous ethanol. The invention has the beneficial effects that: the photocatalyst has a nano-scale particle size (less than or equal to 10nm) and large specific surface area, an appropriate amount of noble metals are added to reduce the electron-hole recombination probability, thus generating a lot of hydroxyl free radicals (OH), and improving the quantum conversion rate; and by adding an appropriate amount of ions, the optical excitation range is expanded from ultraviolet region to visible region,so that the application environment becomes wider and the energy consumption is reduced.

Description

technical field [0001] The invention relates to a photocatalyst processing technology, in particular to a nanoscale photocatalyst with high quantum conversion rate and a preparation process thereof. Background technique [0002] Photocatalyst is a non-toxic, harmless and static environmental protection treatment material recognized by the international community that does not produce secondary pollution. It is widely used in indoor air purification, industrial waste gas, domestic sewage, industrial sewage and other environmental protection treatment fields. universal approval. However, at present, there is still a lack of in-depth research on photocatalysis theory in China, as well as the core high-efficiency photocatalyst used to implement this technology. The narrow photoresponse range of existing photocatalysts (<380nm), low quantum conversion efficiency (≤30%), low utilization rate of visible light, and waste of energy are the main problems that plague the developmen...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/02B01J35/10
CPCB01J23/002B01J23/8906B01J2523/00B01J35/618B01J35/617B01J35/40B01J35/39B01J35/615B01J2523/18B01J2523/47B01J2523/828B01J2523/842
Inventor 包禾欣
Owner 浙江森井生物技术股份有限公司
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