Photocatalyst for efficiently degrading organic pollutants and preparation method of the photocatalyst

A technology of organic pollutants and photocatalysts, applied in the direction of physical/chemical process catalysts, water pollutants, chemical instruments and methods, etc., can solve the problems of catalysts being difficult to hydrate and disperse, so as to overcome easy hydration and disperse, and save treatment costs , evenly distributed effect

Pending Publication Date: 2019-10-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional Fenton and photocatalytic oxidation efficiency, the efficiency of the synergistic system is greatly improved. At the same time, the catalyst is not easy to hydrate and disperse, which solves the problem of TiO 2 Disadvantages of easy hydration dispersion and continuous dosing of iron in Fenton system

Method used

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  • Photocatalyst for efficiently degrading organic pollutants and preparation method of the photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 1.322 g of sodium silicate solid with a modulus of 3.2 and pour it into a beaker, add 10 ml of deionized water, and stir well until the solid is completely dissolved.

[0049] Weigh 3.9 g of concentrated sulfuric acid with a mass fraction of 98% and add it into 15.21 g of deionized water to dilute to a dilute sulfuric acid solution with a mass fraction of 20%.

[0050] Weigh FeSO 4 ·7H 2 Pour 0.418 g of O solid into a beaker, add 15 ml of deionized water, stir well until the solid is completely dissolved, and add dropwise dilute sulfuric acid solution to adjust the pH to 5.

[0051] Slowly add dilute sulfuric acid into the sodium silicate solution dropwise, and stop adding dilute sulfuric acid when the pH of the sol is adjusted to 5, add a mixture of 2.146g of metatitanic acid and 1.486g of aluminum oxide that has been well ground into the silica sol, and disperse it by ultrasonic 30min to disperse the mixture evenly.

[0052] Put the mixed material into a cons...

Embodiment 2

[0057] Weigh 1.322 g of sodium silicate solid with a modulus of 3.2 and pour it into a beaker, add 10 ml of deionized water, and stir well until the solid is completely dissolved.

[0058] Weigh 3.9 g of concentrated sulfuric acid with a mass fraction of 98% and add it into 15.21 g of deionized water to dilute to a dilute sulfuric acid solution with a mass fraction of 20%.

[0059] Weigh FeSO 4 ·7H 2 Pour 0.696 g of O solid into a beaker, add 15 ml of deionized water, stir well until the solid is completely dissolved, and add dropwise dilute sulfuric acid solution to adjust the pH to 5.

[0060] Slowly add dilute sulfuric acid into the sodium silicate solution dropwise, and stop the dropwise addition of dilute sulfuric acid when the pH of the sol is adjusted to 5, add a mixture of 2.233g of metatitanic acid and 1.486g of aluminum oxide that has been well ground into the silica sol, and disperse it by ultrasonic 30min to disperse the mixture evenly.

[0061] Put the mixed ma...

Embodiment 3

[0066] Weigh 1.322 g of sodium silicate solid with a modulus of 3.2 and pour it into a beaker, add 10 ml of deionized water, and stir well until the solid is completely dissolved.

[0067] Weigh 3.9 g of concentrated sulfuric acid with a mass fraction of 98% and add it into 15.21 g of deionized water to dilute to a dilute sulfuric acid solution with a mass fraction of 20%.

[0068] Weigh FeSO 4 ·7H 2 Pour 1.01 g of O solid into a beaker, add 15 ml of deionized water, stir well until the solid is completely dissolved, add dropwise dilute sulfuric acid solution to adjust the pH to 5.

[0069] Slowly add dilute sulfuric acid into the sodium silicate solution dropwise, and stop adding dilute sulfuric acid when the pH of the sol is adjusted to 5, add a mixture of 2.320g metatitanic acid and 1.486g aluminum oxide that has been well ground into the silica sol, and disperse it by ultrasonic 30min to disperse the mixture evenly.

[0070] Put the mixed material into a constant temper...

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Abstract

The invention relates to a photocatalyst for efficiently degrading organic pollutants and a preparation method thereof. According to the photocatalyst, a silicon-aluminum composite oxide is used as acarrier, and ferric oxide and titanium dioxide are used as effective components; wherein the effective components are immobilized on the carrier. The TiO2 and Fe2O3 in the catalyst are uniformly distributed, and the immobilized TiO2 is not easy to hydrate and disperse; Fe<3+> in the system can be reduced into Fe<2+> in time, so that the generation of iron sludge is reduced, and the utilization rate of iron ions is increased. The catalyst particles are not easy to crack in water, so that a Fenton-photocatalysis synergistic system has practical application value. Compared with a traditional Fenton and photocatalysis advanced oxidation system, the catalyst has the advantage that the catalytic oxidation efficiency is greatly improved.

Description

technical field [0001] The invention relates to a photocatalyst for efficiently degrading organic pollutants and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] With the rapid development of industry and agriculture in our country, environmental pollution has become increasingly serious. Among them, people's water safety is under great threat. Most of the river systems in various regions are polluted, and the water quality pollution makes the water quality of many urban water bodies worse than Class IV. How to improve water quality and water treatment efficiency is an urgent problem in my country's water treatment industry. Pollutants in modern water systems are quite complex, especially some substances with stable molecular structures that are difficult to biodegrade directly, making it difficult for the normal operation of water supply and drainage plants. These structurally stable substances often include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/30C02F101/38
CPCB01J23/002B01J23/745B01J35/004B01J2523/00C02F1/722C02F1/725C02F2101/30C02F2101/40C02F2305/026B01J2523/31B01J2523/41B01J2523/47B01J2523/842
Inventor 张文郁纪军李继聪陈键
Owner QILU UNIV OF TECH
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