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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 Ag‑AgBr / Al‑MCM‑41 composite functional materials by utilizing natural attapulgite, which includes the following steps: using natural clay mineral attapulgite as raw material, soaking it with inorganic acid to obtain acidified attapulgite. ; Use acidified attapulgite as raw material, mix it evenly with NaOH solid, and activate it by roasting at high temperature; add deionized water to the activated attapulgite, and take the upper leachate for later use; add the leachate to the surfactant solution, and use in-situ In the assembly method, AgNO3 is introduced into the above-mentioned synthesis mother liquor, and AgBr precipitate is generated at the same time. After a hydrothermal process, the synthesis product is roasted to obtain a composite functional material. The beneficial effects of the present invention are: the raw materials are cheap and easy to obtain, the preparation process is simple and feasible, and the "synthesis" and "functionalization" of mesoporous materials can be completed in one step by using the in-situ assembly method, avoiding the use of solvents in conventional post-treatment methods. And multiple roasting and other processes, saving time and energy, and no pollution to the environment.

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
CPCB01J29/74B01J37/10B01J2229/186B01J35/615B01J35/633B01J35/39
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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