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A kind of preparation method of nanometer photocatalyst

A nano-photocatalyst, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of low efficiency of organic pollutants and ineffective sunlight Utilization, weak ultraviolet light intensity and other problems, to achieve the effect of good dispersion, good separation and low cost

Active Publication Date: 2018-06-29
朱明甫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large forbidden band width, the absorption band is in the ultraviolet region, and there are only about 5% of ultraviolet light in solar energy, so more than 95% of sunlight cannot be effectively utilized.
In addition, due to the weak intensity of ultraviolet light that can excite titanium dioxide in sunlight, the efficiency of photocatalytic degradation of organic pollutants that directly uses sunlight as a light source is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of nano photocatalyst, comprising the following steps:

[0028] 1) Preparation of hollow nano titanium dioxide

[0029] Add 12.6g of titanium tetrachloride, 23.5g of sodium citrate and 7g of urea into 800g of deionized water in sequence, and stir magnetically for 30 minutes to fully dissolve the added substances to form a mixed solution of A; then slowly add 6g of polyacrylamide into the mixed solution of A , continue to magnetically stir for 60min to form a mixed solution of B; transfer the mixed solution of B to a hydrothermal reactor, and after reacting for 15 hours at 240°C, take out the hydrothermal reactor and cool it to room temperature naturally, and put the crude oil in the hydrothermal reactor After the product was washed with deionized water and absolute ethanol, it was dried in a vacuum oven at 70°C for 36 hours to obtain a hollow titanium dioxide;

[0030] 2) Preparation of polypyrrole tubes

[0031] Dissolve 30g of methyl orange into...

Embodiment 2

[0037] A preparation method of nano photocatalyst, comprising the following steps:

[0038] 1) Preparation of hollow nano titanium dioxide

[0039] Add 12g of titanium tetrachloride, 25g of sodium citrate and 7.5g of urea into 900g of deionized water in sequence, and stir magnetically for 40 minutes to fully dissolve the added substances to form a mixed solution of A; then slowly add 7g of polyacrylamide into the mixed solution of A, Continue magnetic stirring for 70 minutes to form a mixed solution of B; transfer the mixed solution of B to a hydrothermal reaction kettle, and after reacting at 250°C for 12 hours, take out the hydrothermal reaction kettle and cool it to room temperature naturally, and remove the crude product in the hydrothermal reaction kettle After washing with deionized water and absolute ethanol, dry in a vacuum oven at 75°C for 26 hours to obtain hollow titanium dioxide;

[0040] 2) Preparation of polypyrrole tubes

[0041] Dissolve 32g of methyl orange ...

Embodiment 3

[0047] A preparation method of nano photocatalyst, comprising the following steps:

[0048] 1) Preparation of hollow nano titanium dioxide

[0049] Add 15g of titanium tetrachloride, 25g of sodium citrate and 8g of urea into 1000g of deionized water in turn, stir magnetically for 50 minutes to fully dissolve the added substances to form a mixed solution of A; then slowly add 7g of polyacrylamide into the mixed solution of A, continue Magnetic stirring for 80 minutes to form a mixed solution of B; transfer the mixed solution of B to a hydrothermal reaction kettle, and after reacting at 260°C for 10 hours, take out the hydrothermal reaction kettle and cool it to room temperature naturally, and use the crude product in the hydrothermal reaction kettle After washing with deionized water and absolute ethanol, dry it in a vacuum oven at 76°C for 33 hours to obtain hollow titanium dioxide;

[0050] 2) Preparation of polypyrrole tubes

[0051] Dissolve 28g of methyl orange in 560g o...

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Abstract

The invention discloses a method for preparing a nanophotocatalyst. The photocatalyst is prepared through the preparation of hollow nanometer titanium dioxide, the preparation of polypyrrole tubes, the surface modification of the polypyrrole tubes and the synthesis of nanophotocatalysts. The catalyst can make full use of solar energy, especially the visible light energy in sunlight. The photocatalyst prepared by the invention has the advantages of low preparation cost, wide visible light response range, and high photocatalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and relates to a method for preparing a photocatalyst, in particular to a method for preparing a nanometer photocatalyst. Background technique [0002] Environment and energy are major issues facing and urgently needed to be resolved in the sustainable development of contemporary human beings. Solar energy has the advantages of being cheap, clean, and renewable. Therefore, it is the goal of people to develop efficient and fast solar energy conversion and storage technologies and use solar energy to decompose organic pollutants to achieve sustainable human development. Photocatalytic technology can achieve this goal. Photocatalytic technology has the advantages of direct use of solar energy, less secondary pollution, mild reaction conditions, and easy operation. It is known as an ideal environmental treatment technology and clean energy production technology. [0003] Among them, photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30C02F101/30
CPCC02F1/30B01J31/0208B01J31/06B01J31/38C02F2101/308C02F2305/10B01J35/39
Inventor 朱明甫
Owner 朱明甫
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