A method for preparing ag-agbr/al-mcm-41 composite functional material using natural attapulgite

An al-mcm-41, attapulgite technology, applied in the fields of photocatalysis and material chemistry, can solve the problems of cumbersome preparation process, high price, narrow catalyst source range, etc. The use of solvents and the effect of multiple firings

Active Publication Date: 2018-12-04
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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  • A method for preparing ag-agbr/al-mcm-41 composite functional material using natural attapulgite
  • A method for preparing ag-agbr/al-mcm-41 composite functional material using natural attapulgite
  • A method for preparing ag-agbr/al-mcm-41 composite functional material using natural attapulgite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0039] Dissolve 0.3g of CTAB with 20ml of deionized water at 40°C for 1 hour, then add it to the silicon-aluminum source obtained above, and use 2mol / L of HNO 3 The pH=7 of the above solution was adjusted.

[0040] Weigh 0.1g of AgNO 3 , dissolved in 10ml of deionized water, and added dropwise to the above mixed solution, and stirred for 6h in the dark. The synthesized product was transferred to a high-pr...

Embodiment 2

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

[0043] Dissolve 0.7g of CTAB with 20ml of deionized water at 40°C for 1 hour, then add it to the silicon-aluminum source obtained above, and use 2mol / L of HNO 3 The pH=7 of the above solution was adjusted.

[0044] Weigh 0.3g of AgNO 3 , dissolved in 10ml of deionized water, and added dropwise to the above mixed solution, and stirred for 6h in the dark. The synthesized product was transferred to a high-pr...

Embodiment 3

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

[0047] Dissolve 1.1 g of CTAB with 20 ml of deionized water at 40°C for 1 h, then add it to the silicon-aluminum source obtained above, and add 2 mol / L of HNO 3 The pH=7 of the above solution was adjusted.

[0048] Weigh 0.5g of AgNO 3 , dissolved in 10ml of deionized water, and added dropwise to the above mixed solution, and stirred for 6h in the dark. The synthesized product was transferred to a high-pr...

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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 material by using natural attapulgite. Background technique [0002] With the acceleration of social industrialization, the treatment of environmental pollutants has become a major concern of human beings. The development of new and practical environmental protection technologies has always been one of the hot topics for researchers. Studies in recent decades have found that semiconductor photocatalytic oxidation technology has outstanding characteristics such as low energy consumption, strong oxidation ability, mild reaction conditions, easy operation, and can reduce secondary pollution in removing pollutants, and has become one of the practical industrial technologies. one. However, most traditional visible light catalysts can only absorb ultraviolet light, such as TiO 2 , ZnO, etc. As ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74
CPCB01J29/74B01J35/004B01J35/1019B01J35/1038B01J37/10B01J2229/186
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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