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Preparation method of Fe-N-TiO2/13X molecular sieve photocatalyst

A technology of photocatalyst and molecular sieve, which is applied in the direction of molecular sieve catalyst, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problem of fast electron-hole recombination rate, low light utilization rate of photocatalyst, loss of active components of catalyst, etc. problem, to achieve the effect of improving photon utilization rate, improving adsorption performance and photocatalytic rate, and promoting electron-hole separation.

Inactive Publication Date: 2019-05-17
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The utilization rate of visible light of photocatalyst is low, and the electron-hole recombination rate is fast, the catalyst is easily deactivated, and the catalytic efficiency is low;
[0006] 2) Some supporting materials have a serious problem of loss of catalyst active components, and poor acid and alkali resistance

Method used

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  • Preparation method of Fe-N-TiO2/13X molecular sieve photocatalyst

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Effect test

Embodiment 1

[0029] The Fe-N-TiO that this embodiment 1 provides 2 The preparation method of / 13X molecular sieve photocatalyst comprises the steps:

[0030] Step S1: Activate the 13X molecular sieve, grind the spherical 13X molecular sieve into powder particles, sieve to 40-60 mesh, and use the sieved molecular sieve powder with a mass concentration of 10% hydrochloric acid solution and 5% Soak in sodium hydroxide solution at room temperature, wash with ultrasonic vibration for 15 minutes, then rinse with distilled water several times, then put it in an oven for 10 hours at 100°C, and calcinate at 500°C for 1 hour in a muffle furnace to remove surface and channel impurities, take it out and cool it for later use;

[0031] Step S2: Fully mix 40ml of absolute ethanol, 10ml of acetic acid and 20ml of tetrabutyl titanate to form a clear solution after stirring. Weigh 20g of the activated molecular sieve powder into the above clear solution and stir to obtain A;

[0032] Step S3: take by weig...

Embodiment 2

[0036]The Fe-N-TiO that this embodiment 2 provides 2 The preparation method of / 13X molecular sieve photocatalyst comprises the steps:

[0037] Step S1: Activate the 13X molecular sieve, grind the spherical 13X molecular sieve into powder particles, sieve to 40-60 mesh, and use the sieved molecular sieve powder with a mass concentration of 10% hydrochloric acid solution and 5% Soak in sodium hydroxide solution at room temperature, wash with ultrasonic vibration for 15 minutes, then rinse with distilled water several times, then put it in an oven for 11 hours at 110°C, and calcinate at 520°C for 1.5 hours in a muffle furnace to remove surface and channel impurities, take it out and cool it for later use ;

[0038] Step S2: fully mix 60ml of absolute ethanol, 13ml of acetic acid and 30ml of tetrabutyl titanate, and then form a clear solution after stirring. Weigh 20g of activated molecular sieve powder into the above clear solution and stir to obtain A;

[0039] Step S3: take ...

Embodiment 3

[0043] The Fe-N-TiO that this embodiment 3 provides 2 The preparation method of / 13X molecular sieve photocatalyst comprises the steps:

[0044] Step S1: Activate the 13X molecular sieve, grind the spherical 13X molecular sieve into powder particles, sieve to 40-60 mesh, and use the sieved molecular sieve powder with a mass concentration of 10% hydrochloric acid solution and 5% Soak in sodium hydroxide solution at room temperature, clean with ultrasonic vibration for 15 minutes, then rinse with distilled water for several times, then put it in an oven for 12 hours at 120°C, calcinate at 550°C for 2 hours in a muffle furnace to remove surface and channel impurities, take it out and cool it for later use;

[0045] Step S2: fully mix 30ml of absolute ethanol, 7ml of acetic acid and 15ml of tetrabutyl titanate, and then form a clear solution after stirring. Weigh 20g of the activated molecular sieve powder into the above clear solution and stir to obtain A;

[0046] Step S3: take...

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Abstract

The invention discloses a preparation method of Fe-N-TiO2 / 13X molecular sieve photocatalyst, and belongs to the technical field of photocatalytic material preparation. The lattice structure of TiO2 ischanged by performing doping modification of a non-metal ion N on TiO2, the forbidden bandwidth is reduced, and the absorption strength for light is enhanced. The TiO2 doped and modified with Fe andN is supported on 13X molecular sieve powder particles to improve the degradation ability. The catalyst is prepared from the components: a photocatalyst TiO2, Fe and N. The doping of the metal ion Feand the non-metal ion N changes the lattice structure and the energy level structure of the TiO2, reduces the forbidden bandwidth, improves the absorption of visible light, reduces the recombination of electron-hole, and increases photocatalytic efficiency. When the Fe-N-TiO2 / 13X molecular sieve photocatalyst operates in the process of wastewater treatment, the adsorption of the molecular sieve forms a concentration difference adsorption effect on the surface of the photocatalyst, and the degradation rate can be effectively improved.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a Fe-N-TiO 2 The invention discloses a preparation method of / 13X molecular sieve photocatalyst, which belongs to the technical field of photocatalytic material preparation. Background technique [0002] TiO 2 As a photocatalyst, it has the advantages of non-toxicity, good chemical stability, cheap and easy to obtain, and has broad application prospects. TiO 2 The disadvantage is that it has a wide forbidden band, can only be excited by ultraviolet light to produce photocatalytic activity, the utilization rate of visible light is low, and electron-hole recombination is easy, resulting in low photocatalytic efficiency; a large number of studies have shown that it can be modified, coupled and loaded to increase the TiO 2 The catalytic efficiency of titanium dioxide after metal modification has better antibacterial activity, especially the antibacterial activity of titani...

Claims

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Application Information

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IPC IPC(8): B01J29/08C02F1/30C02F101/36C02F101/38
Inventor 高永周俊我李婷婷傅小飞张曼莹郭梅鑫盛庆
Owner JIANGSU UNIV OF TECH
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