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Preparation method of TiO2/rare earth/HY molecular sieve photocatalytic material

A technology of photocatalytic materials and molecular sieves, applied in the direction of molecular sieve catalysts, catalyst activation/preparation, separation methods, etc., can solve the problems of easy loss of nano-titanium dioxide particle suspension system, wide band gap, low photocatalytic activity, etc., and achieve easy recycling Recycling, not easy to lose, and the effect of increasing photocatalytic activity

Inactive Publication Date: 2018-09-11
SUZHOU JUKANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The photocatalytic activity of nano titanium dioxide is well known, but the current titanium dioxide photocatalyst still has its shortcomings: (1) its band gap is wide, the light absorption is limited to the ultraviolet region, and the photocatalytic activity is low; (2) The suspension system of nano-titanium dioxide particles is easy to lose, and there are problems such as difficulty in recycling, so it has not been widely used in photocatalytic oxidation and wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] S1: Mix 10 parts of ethyl titanate and 20 parts of absolute ethanol, stir continuously, add 4 parts of cerium oxalate, 8 parts of neodymium nitrate and 3 parts of hydrated yttrium carbonate into it dropwise while stirring, and the temperature rises after the addition is completed. When the temperature reaches 70°C, keep stirring for 30 minutes; then add 2 drops of glacial acetic acid dropwise to obtain an impregnating solution;

[0023] S2: The HY molecular sieve was roasted and reacted at a temperature of 180°C for 30 minutes, and set aside;

[0024] S3: Take the HY molecular sieve pretreated in step S2 and add it to the impregnation solution described in step S1, the solid-to-liquid ratio of the two is 1:20; heat up to 150°C at a rate of 2°C / min, and stir and react at a rate of 500r / min for 1h ;

[0025] S4: Then, the temperature was raised to 220°C at a rate of 1°C / min, and the impregnation reaction was performed for 1 hour. After the reaction was cooled, the photoc...

Embodiment 2

[0028] S1: Mix 20 parts of ethyl titanate and 30 parts of absolute ethanol, stir constantly, add 8 parts of cerium oxalate, 12 parts of neodymium nitrate and 10 parts of hydrated yttrium carbonate into it dropwise while stirring, and increase the temperature after the addition is completed When the temperature reaches 90°C, keep stirring for 50 minutes; then add 5 drops of glacial acetic acid dropwise to obtain an impregnating solution;

[0029] S2: The HY molecular sieve was roasted and reacted at a temperature of 220°C for 40 minutes, and set aside;

[0030] S3: Take the HY molecular sieve pretreated in step S2 and add it to the impregnating solution described in step S1, the solid-to-liquid ratio of the two is 1:40; heat up to 180°C at a rate of 5°C / min, and stir and react at a rate of 700r / min for 2h ;

[0031] S4: Then the temperature was raised to 260°C at a rate of 3°C / min, and the impregnation reaction was performed for 2 hours. After the reaction was cooled, the phot...

Embodiment 3

[0034] S1: Mix 15 parts of ethyl titanate and 23 parts of absolute ethanol, stir continuously, add 5 parts of cerium oxalate, 9 parts of neodymium nitrate and 5 parts of hydrated yttrium carbonate into it dropwise while stirring, and the temperature rises after the addition is completed When the temperature reaches 75°C, keep stirring for 35 minutes; then add 3 drops of glacial acetic acid dropwise to obtain an impregnating solution;

[0035] S2: The HY molecular sieve was roasted and reacted at a temperature of 200°C for 34 minutes, and set aside;

[0036] S3: Take the HY molecular sieve pretreated in step S2 and add it to the impregnating liquid described in step S1, the solid-to-liquid ratio of the two is 1:25; heat up to 165°C at a rate of 3°C / min, and stir at a rate of 550r / min for 1.5 h;

[0037] S4: Then the temperature was raised to 235°C at a rate of 1°C / min, and the impregnation reaction was performed for 1.5 hours. After the reaction was cooled, the photocatalytic ...

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Abstract

The invention provides a preparation method of a TiO2 / rare earth / HY molecular sieve photocatalytic material. The preparation method comprises following steps: mixing ethyl titanate and anhydrous ethanol, stirring continuously, dropwise adding cerium oxalate, neodymium nitrate, and yttrium carbonate hydrate under stirring; after addition, heating the mixture to a temperature of 70-90 DEG C, continuously stirring for 30 to 50 minutes; then dropwise adding 2-5 drops of glacial acetic acid to obtain an impregnation liquid; burning HY molecular sieves at a temperature of 180 to 220 DEG C to carry out reactions for 30 to 40 minutes, saving HY molecular sieves for later use; adding preprocessed HY molecular sieves into the impregnation liquid, wherein the solid / liquid ratio is 1:20-40; heating the solution to a temperature of 150-180 DEG C at a speed of 2-5 DEG C / min, carrying out reactions for 1 to 2 hours at a stirring speed of 500-700 r / min; then heating the solution to a temperature of 220-260 DEG C at a speed of 1-3 DEG C / min, carrying out impregnation reactions for 1-2 hours, cooling, washing the reaction product by distilled water, and burning the reaction product to obtain the photocatalytic material.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalytic materials, in particular to a TiO 2 / Rare earth / HY molecular sieve photocatalytic material preparation method. Background technique [0002] As an abundant and green energy source, solar energy has always attracted people's attention. In recent years, technological inventions related to the efficient use of solar energy have emerged in an endless stream. Among them, photocatalytic technology, as an emerging environment-friendly energy technology, can effectively realize the conversion of solar energy into chemical energy. In recent years, a large number of studies have shown that photocatalytic technology can be effectively used for the oxidative degradation of pollutants in water without consuming its own and other energy sources. [0003] Nano-titanium dioxide is a new type of non-toxic and harmless inorganic functional material. It has the advantages of large specific s...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J37/02B01J37/08C02F1/32B01D53/86B01D53/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01D53/8668C02F1/32B01J29/088B01J37/0203B01J37/0207B01J37/0213B01J37/08B01D2257/70B01D2259/804C02F2101/38C02F2101/34C02F2101/36C02F2101/308C02F2305/10B01J35/39
Inventor 张金龙田宝柱邢明阳王灵芝雷菊英
Owner SUZHOU JUKANG NEW MATERIAL TECH
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