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Method for preparing Ag-AgBr/Al-MCM-41 composite functional material from natural attapulgite

A technology of attapulgite and composite functions, which is applied in the field of photocatalysis and material chemistry, which can solve the problems of cumbersome preparation process, high price, and narrow range of catalyst sources, and achieve cheap and easy raw materials, low production costs, and avoid the use of solvents and the effect of multiple roasting

Active Publication Date: 2017-02-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the carrier sources of the catalysts involved in the above patents are narrow, expensive, and the preparation process is relatively cumbersome.

Method used

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  • Method for preparing Ag-AgBr/Al-MCM-41 composite functional material from natural attapulgite
  • Method for preparing Ag-AgBr/Al-MCM-41 composite functional material from natural attapulgite
  • Method for preparing Ag-AgBr/Al-MCM-41 composite functional material from natural attapulgite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 20g of attapulgite clay, soak it in 80ml 6mol / L HCl at 60°C for 12h, filter with suction, repeatedly wash with deionized water until it is neutral, and dry at 80°C to obtain 18.2g of acidified attapulgite. Weigh 10g of acidified attapulgite, grind with 15g of NaOH solid, mix well, and calcinate at 550°C for 4h. Transfer the roasted mixture to a stirred container, add 65 ml of deionized water, and stir for 24 hours to fully dissolve the soluble aluminosilicate in it, and take the upper layer of leaching solution as a source of silicon and aluminum for later use.

[0039] 0.3g of CTAB was dissolved in 20ml of deionized water at 40℃ for 1h after stirring, and then added to the silicon-alumina source obtained above. Under continuous stirring, use 2mol / L of HNO 3 Adjust the pH of the above solution=7.

[0040] Weigh 0.1g AgNO 3 , Dissolve with 10ml of deionized water and add dropwise to the above mixed solution, and stir for 6h in the dark. The synthesized product was tran...

Embodiment 2

[0042] Weigh 20g of attapulgite clay, soak it in 80ml 6mol / L HCl at 60°C for 12h, filter with suction, repeatedly wash with deionized water until it is neutral, and dry at 80°C to obtain 18.2g of acidified attapulgite. Weigh 10g of acidified attapulgite, grind with 15g of NaOH solid, mix well, and calcinate at 550°C for 4h. Transfer the roasted mixture to a stirred container, add 65 ml of deionized water, and stir for 24 hours to fully dissolve the soluble aluminosilicate in it, and take the upper layer of leaching solution as a source of silicon and aluminum for later use.

[0043] Dissolve 0.7g of CTAB with 20ml of deionized water at 40°C for 1h, then add it to the silicon-alumina source obtained above. Under continuous stirring, use 2mol / L of HNO 3 Adjust the pH of the above solution=7.

[0044] Weigh 0.3g AgNO 3 , Dissolve with 10ml of deionized water and add dropwise to the above mixed solution, and stir for 6h in the dark. The synthesized product was transferred to an autocl...

Embodiment 3

[0046] Weigh 20g of attapulgite clay, soak it in 80ml 6mol / L HCl at 60°C for 12h, filter with suction, repeatedly wash with deionized water until it is neutral, and dry at 80°C to obtain 18.2g of acidified attapulgite. Weigh 10g of acidified attapulgite, grind with 15g of NaOH solid, mix well, and calcinate at 550°C for 4h. Transfer the roasted mixture to a stirred container, add 65 ml of deionized water, and stir for 24 hours to fully dissolve the soluble aluminosilicate in it, and take the upper layer of leaching solution as a source of silicon and aluminum for later use.

[0047] Dissolve 1.1 g of CTAB with 20 ml of deionized water at 40°C for 1 hour and add it to the silicon-aluminum source obtained above. Under continuous stirring, use 2mol / L of HNO 3 Adjust the pH of the above solution=7.

[0048] Weigh 0.5g AgNO 3 , Dissolve with 10ml of deionized water and add dropwise to the above mixed solution, and stir for 6h in the dark. The synthesized product was transferred to an a...

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Abstract

The invention relates to a method for preparing an Ag-AgBr / Al-MCM-41 composite functional material from natural attapulgite. The method includes steps: taking the natural clay mineral attapulgite as a raw material, and soaking in organic acid to obtain acidized attapulgite; taking the acidized attapulgite as a raw material, well mixing with NaOH solid, and performing high-temperature roasting for activation; adding deionized water into the activated attapulgite, and taking upper leachate for standby application; adding the leachate into surfactant solution, introducing AgNO3 into synthesized mother solution by means of in-situ assembly to generate AgBr precipitate, carrying out a hydrothermal process, and calcining a synthesized product to obtain the composite functional material. The method has advantages that raw materials are cheap and easy to acquire, and a preparation process is simple and feasible; by in-situ assembly, one-step completion of synthesis and functionalization of a mesoporous material can be realized, solvent utilization in a conventional aftertreatment method and procedures of repeated calcination are avoided, time saving and energy saving are realized, and environment pollution is avoided.

Description

Technical field [0001] The invention belongs to the technical field of photocatalysis and material chemistry, and relates to a method for preparing Ag-AgBr / Al-MCM-41 composite functional materials by using natural attapulgite. Background technique [0002] With the acceleration of the process of social industrialization, the treatment of environmental pollutants has become a major issue that humans are most concerned about. The development of new and practical environmental protection technologies has always been one of the hot topics studied by the majority of scientific researchers. Research in recent decades has found that the semiconductor photocatalytic oxidation technology has the outstanding characteristics of low energy consumption, strong oxidation ability, mild reaction conditions, simple operation, and reduction of secondary pollution in the removal of pollutants. It has become one of the practical industrialization technologies. One. However, most traditional visible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74
CPCB01J29/74B01J37/10B01J2229/186B01J35/615B01J35/633B01J35/39
Inventor 关媛王少莽黄岩刘成赵鸿运赵玲龚文静杨鹏
Owner CHANGZHOU UNIV
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