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Method for preparing a mesoporous Ag2O/TiO2 composite material

A composite material and mesoporous technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as photocatalysis or low energy conversion efficiency, and achieve good photocatalytic performance

Inactive Publication Date: 2018-04-20
合肥华福土工合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current research results, the visible light catalysis or energy conversion efficiency is generally low, and the understanding of the visible photochemical mechanism of various modification methods is still controversial. Therefore, visible light TiO 2 The development of photocatalysts will still be a research hotspot in the future

Method used

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  • Method for preparing a mesoporous Ag2O/TiO2 composite material
  • Method for preparing a mesoporous Ag2O/TiO2 composite material
  • Method for preparing a mesoporous Ag2O/TiO2 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add CTAB and P123 to water at a molar ratio of 1:1, add it to the mixture of ethanol and hydrochloric acid, and stir in a water bath at 40°C to dissolve it. After 1 hour, a good amount of TBOT (variable 1) was added, and after 1 hour, a prefabricated silver nitrate aqueous solution (variable 2) was added dropwise. After 1 hour of heat preservation in a water bath, the stirring was stopped, and the mixture was transferred into a reaction kettle, and subjected to hydrothermal reaction in an oven at 100°C. After 24 hours, it was suction filtered and dried in an oven. The samples were heated from room temperature to 400°C at 1.5°C / min and kept at 400°C for 5 hours to obtain TAg series samples.

[0030] Calcination process: in air atmosphere, after raising to 100°C at a speed of 1.5-2°C / min, continue to raise to 450°C at a speed of 1.5-2°C / min and keep for 5 hours. Finally, after cooling down to 50°C at a rate of 2-3°C / min, the calcined sample was taken out.

Embodiment 2

[0032] Add CTAB and P123 to water at a molar ratio of 5:1, add to the mixture of ethanol and hydrochloric acid, and stir in a water bath at 40°C to dissolve. After 1 hour, a good amount of TBOT (variable 1) was added, and after 1 hour, a prefabricated silver nitrate aqueous solution (variable 2) was added dropwise. After 1 hour of heat preservation in a water bath, the stirring was stopped, and the mixture was transferred into a reaction kettle, and subjected to hydrothermal reaction in an oven at 100°C. After 24 hours, it was suction filtered and dried in an oven. The samples were heated from room temperature to 400°C at 1.5°C / min and kept at 400°C for 5 hours to obtain TAg series samples.

[0033] Calcination process: in air atmosphere, after raising to 100°C at a speed of 1.5-2°C / min, continue to raise to 450°C at a speed of 1.5-2°C / min and keep for 5 hours. Finally, after cooling down to 50°C at a rate of 2-3°C / min, the calcined sample was taken out.

Embodiment 3

[0035] Add CTAB and P123 to water at a molar ratio of 10:1, add it to the mixture of ethanol and hydrochloric acid, and stir in a water bath at 40°C to dissolve it. After 1 hour, a good amount of TBOT (variable 1) was added, and after 1 hour, a prefabricated silver nitrate aqueous solution (variable 2) was added dropwise. After 1 hour of heat preservation in a water bath, the stirring was stopped, and the mixture was transferred into a reaction kettle, and subjected to hydrothermal reaction in an oven at 100°C. After 24 hours, it was suction filtered and dried in an oven. The samples were heated from room temperature to 400°C at 1.5°C / min and kept at 400°C for 5 hours to obtain TAg series samples.

[0036] Calcination process: in air atmosphere, after raising to 100°C at a speed of 1.5-2°C / min, continue to raise to 450°C at a speed of 1.5-2°C / min and keep for 5 hours. Finally, after cooling down to 50°C at a rate of 2-3°C / min, the calcined sample was taken out. Example 4

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Abstract

The invention discloses a method for preparing a mesoporous Ag2O / TiO2 composite material. The method is characterized in that by using the unique characteristics of greater pore diameter, specific area and pore volume of a mesoporous material, inorganic metal particles with catalytic degradation efficiency, such as Ti and Ag, are doped into the hole wall of the mesoporous material by a proper method and are subjected to certain post treatment to obtain the mesoporous composite material. A synthesized product is characterized by using a wide-angle X-ray diffraction pattern, an N2 low temperature adsorption-desorption curve and a transmission electron microscopy (TEM), and further a structure and properties of the mesoporous material under different reaction conditions are researched. The synthesized mesoporous composite material is used for adsorption, catalysis and photodegradation experiments of pollutants, in particular to macromolecular pollutants in sewage and harmless treatment ofthe pollutants is realized. The result shows that Ag atom-doped mesoporous titania well retains the stability of a mesoporous structure; the pore diameter of the mesoporous composite material reaches4.5nm; in addition, the mesoporous composite material has a good photodegradation effect on methyl hesperidin.

Description

Technical field: [0001] The invention relates to the field of material synthesis, in particular to a method for preparing mesoporous Ag 2 O / TiO 2 Composite approach. Background technique: [0002] Since the scientists of the Mobile research group reported the M41S series of mesoporous materials in 1992, the research on mesoporous materials has set off an upsurge in the world and has achieved gratifying results. With the in-depth research on the structure, performance and formation mechanism of mesoporous materials, mesoporous materials with a single matrix can no longer meet people's requirements for their functions. Therefore, mesoporous composite materials doped with different elements are attracting more and more attention. Attention of multiple researchers. doped photocatalyst TiO 2 The ions generally include transition metal ions, rare earth metal ions, noble metal ions, inorganic ions and other ions. [0003] In the study of metal ion doping, Wei Zhao et al. prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J37/10B01J37/08C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J23/002B01J23/50B01J37/0018B01J37/082B01J37/10C02F2305/10C02F2101/34C02F2101/40C02F2101/38C02F2101/308B01J35/393B01J35/23B01J35/39
Inventor 武全福
Owner 合肥华福土工合成材料有限公司
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