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Photocatalyst and preparation method and application thereof

A technology of photocatalyst and ion exchange method, applied in the field of photocatalyst and its preparation, can solve the problems such as inability to utilize sunlight well, low utilization rate of sunlight, limitation, etc., and achieve remarkable effect and application value, high-efficiency decolorization , the effect of reducing processing costs

Inactive Publication Date: 2012-06-27
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above catalytic systems all require ultraviolet light irradiation, and the utilization rate of sunlight is very low, so they cannot make good use of sunlight, which is greatly restricted in practical applications.

Method used

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  • Photocatalyst and preparation method and application thereof
  • Photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Preparation of mesoporous zeolite material: MZ (Si / Al=50)

[0038] 0.031moL of tetrapropylammonium hydroxide (TPAOH) and 0.001moL of triisopropoxyaluminum (Al( i PrO) 3 ) and 0.05moL of tetraethyl orthosilicate (TEOS) were added to 90mL of water, stirred for 2 hours below 15°C, aged at 10°C for 24h, and then the mixed aqueous solution was added to the surface of 60mL with a concentration of 0.047moL / L Active agent cetyltrimethylammonium bromide (CTAB) aqueous solution, stirred vigorously at 10°C for 3 hours, then aged at room temperature for 4 hours, then put the formed gel into polytetrafluoroethylene hydrothermal In the still, conduct hydrothermal crystallization reaction at 150°C for 24 hours, centrifuge, wash the sample, dry at 100°C overnight, and finally roast at 550°C for 8 hours to obtain the mesoporous zeolite material MZ (Si / Al=50).

[0039] 2. Preparation of mesoporous zeolite material loaded with iron ions by ion exchange method: Fe-MZ (Si / Al=50)

[00...

Embodiment 2

[0067] Preparation of mesoporous zeolite material loaded with iron ions by in-situ doping method: Fe-MZ(Si / Al=50)

[0068] 0.1moL of ferric nitrate (Fe(NO 3 ) 3 9H 2 O) and 0.001moL of aluminum triisopropoxide (Al( i PrO) 3) and 0.05moL of tetraethyl ammonium hydroxide (TEOS) were added to 60mL of water to prepare a mixed aqueous solution; then 30mL of tetrapropylammonium hydroxide (TPAOH) aqueous solution with a concentration of 1.03moL / L was added and stirred at 5°C for 2 hours , and aged at 5°C for 24h; then added to 60mL of an aqueous solution of surfactant cetyltrimethylammonium bromide (CTAB) with a concentration of 0.047moL / L, vigorously stirred at 5°C for 3 hours, and then Aging at room temperature for 4 hours, then put the formed gel into a polytetrafluoroethylene hydrothermal kettle, carry out hydrothermal crystallization reaction at 160°C for 20h, centrifuge, wash the sample, dry at 100°C overnight, and finally dry it at 600°C Calcined for 8 hours, the mesoporo...

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Abstract

The invention discloses a photocatalyst and a preparation method and an application thereof. The photocatalyst is a mesoporous zeolite material loaded with iron ions, and the iron ions lie in the skeleton position and / or mesoporous channels of the mesoporous zeolite. The photocatalyst is prepared by using ion exchange method or insitu doping method to load the iron ions in the skeleton and / or the mesoporous channels of the mesoporous zeolite. The photocatalyst provided by the invention can efficiently decolor, degrade and mineralize organic dyes in ultraviolet lights, and can efficiently decolor, degrade and mineralize organic dyes in visible lights, thus the photocatalyst has strong applicability and has important meaning in practical application. In addition, the photocatalyst has good stability, can be recycled, and can be prepared and processed simply and practicably, thus the waste water treatment cost can be greatly reduced, the industrial requirements of scale and economy of the waste water treatment are satisfied, and the photocatalyst has significant effect and application values.

Description

technical field [0001] The present invention relates to a kind of photocatalyst and its preparation method and application, specifically, it relates to a kind of photocatalyst which not only has catalytic effect under ultraviolet light irradiation, but also has efficient catalytic effect under sunlight irradiation and its preparation method and applications, belonging to the technical field of catalytic materials. Background technique [0002] With the rapid development of printing and dyeing and textile industries, organic dyes have become a major class of environmental pollutants. Because organic dyes basically contain benzene rings, which have the characteristics of high content, complex composition, deep color, and refractory degradation, there is currently no effective method to treat this type of wastewater. Traditional dye wastewater treatment methods include coagulation decolorization, adsorption decolorization, and membrane technology, which only transfer organic m...

Claims

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Application Information

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IPC IPC(8): B01J29/072C02F1/30C02F1/32
CPCY02W10/37
Inventor 周晓霞陈航榕施剑林崔香枝赵晋津朱颜龚云宋禹奠
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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