Molecular sieve with photocatalysis function, and preparation method thereof

A technology of molecular sieve and photocatalysis, which is applied in the field of molecular sieve with photocatalytic function and its preparation, to achieve the effects of enhancing photocatalytic efficiency, prolonging carrier life, and inhibiting recombination

Inactive Publication Date: 2013-05-15
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there is no report on the study of molecular sieve-supported strontium titanate photocatalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A molecular sieve with photocatalytic function, including HZSM-5 molecular sieve, is characterized in that: a sol-gel method is used to composite strontium titanate photocatalyst on the modified HZSM-5 molecular sieve;

[0027] A molecular sieve with photocatalytic function and a preparation method thereof, comprising the following process steps:

[0028] (1) Acid modification of ZSM-5 molecular sieve

[0029] Put 50 g of NaZSM-5 (Nankai University Catalyst Factory, Si / Al=50) and 800 mL of 0.3 mol / L hydrochloric acid solution in a 1L three-necked flask, and stir for four hours at 92°C-95°C; filter the solution while Wash with distilled water, then dry the molecular sieves in an oven at 110 °C for 12 h, grind them and place them in a muffle furnace for calcination at 550 °C for 4 h to obtain HZSM-5, which is ready for use;

[0030] (2) Synthesis of supported strontium titanate photocatalyst by sol-gel method

[0031] First, dissolve 10 mL of glacial acetic acid in 10 m...

Embodiment 2

[0033] A molecular sieve with photocatalytic function, including HZSM-5 molecular sieve, is characterized in that: a sol-gel method is used to composite strontium titanate photocatalyst on the modified HZSM-5 molecular sieve;

[0034] A molecular sieve with photocatalytic function and a preparation method thereof, comprising the following process steps:

[0035] (1) Acid modification of ZSM-5 molecular sieve

[0036] Put 50 g of NaZSM-5 (Nankai University Catalyst Factory, Si / Al=50) and 0.5 mol / L phosphoric acid solution 800 mL in a 1L three-necked flask, and stir for four hours at 92°C-95°C; filter the solution while Wash with distilled water, then dry the molecular sieves in an oven at 110 °C for 12 h, grind them and place them in a muffle furnace for calcination at 550 °C for 4 h to obtain HZSM-5, which is ready for use;

[0037] (2) Synthesis of supported strontium titanate photocatalyst by sol-gel method

[0038] First, dissolve 10 mL of glacial acetic acid in 10 mL of ...

Embodiment 3

[0040] A molecular sieve with photocatalytic function, including HZSM-5 molecular sieve, is characterized in that: a sol-gel method is used to composite strontium titanate photocatalyst on the modified HZSM-5 molecular sieve;

[0041] A molecular sieve with photocatalytic function and a preparation method thereof, comprising the following process steps:

[0042] (1) Acid modification of ZSM-5 molecular sieve

[0043] Put 50 g of NaZSM-5 (Nankai University Catalyst Factory, Si / Al=50) and 800 mL of 3 mol / L oxalic acid solution in a 1L three-necked flask, and stir for four hours at 92°C-95°C; filter the solution while Wash with distilled water, then dry the molecular sieves in an oven at 110 °C for 12 h, grind them and place them in a muffle furnace for calcination at 550 °C for 4 h to obtain HZSM-5, which is ready for use;

[0044] (2) Synthesis of supported strontium titanate photocatalyst by sol-gel method

[0045] First, dissolve 10 mL of glacial acetic acid in 10 mL of dei...

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Abstract

The invention relates to a molecular sieve with a photocatalysis function, and a preparation method of the molecular sieve. The molecular sieve comprises an HZSM-5 molecular sieve, and is characterized in that strontium titanate photocatalyst is compounded on the modified HZSM-5 molecular sieve by a sol-gel method; electron-hole pairs are generated by the photocatalyst particles which are loaded in pore channels and surface of the molecular sieve and are irradiated by ultraviolet light; the interiors of the pore channels of the molecular sieve have very strong electric field intensity, and electrons are gathered on the surface of the molecular sieve, so that the electron-hole pairs are prevented from being compounded, and free active groups are very easily obtained by the organic matter absorbed by the molecular sieve; and therefore, the photocatalytic activity of the photocatalyst can be improved.

Description

technical field [0001] The invention belongs to the field of water purification functional materials, and in particular relates to a molecular sieve with photocatalytic function and a preparation method thereof. Background technique [0002] Catalyst immobilization technology and carrier selection have become a very critical issue in photocatalytic technology. Traditional photocatalytic reaction research is generally carried out in a suspension photocatalytic reaction system. The photocatalyst particles are small and have low specific gravity. Traditional separation methods such as filtration, flocculation, sedimentation and centrifugation are difficult to separate, recycle and regenerate photocatalysts. utilization, so continuous operation cannot be achieved. Moreover, the absorption and blocking of light by suspended photocatalyst particles will affect the irradiation depth of the light source. Therefore, the current suspension photocatalyst photocatalytic system is diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C02F1/32
Inventor 张文杰
Owner SHENYANG LIGONG UNIV
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