Mesoporous Ag/Ag2O/TiO2 solid microsphere material preparation method

A solid and mesoporous technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problem of reduced photocatalytic effect of composite catalysts and achieve catalytic reaction promotion , good repeatability, the effect of large specific surface area

Active Publication Date: 2017-12-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with Au, Pt and Pd, Ag is cheap and easy to obtain, has less toxicity and has bactericidal effect, but when the loading amount of Ag is too large, the photocatalytic effect of the composite catalyst is greatly reduced

Method used

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  • Mesoporous Ag/Ag2O/TiO2 solid microsphere material preparation method
  • Mesoporous Ag/Ag2O/TiO2 solid microsphere material preparation method
  • Mesoporous Ag/Ag2O/TiO2 solid microsphere material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt%), adjust the magnetic stirrer rotation speed to 500rpm, add 2mL silver nitrate solution, add 1.6mL deionized water at the same time, finally turn down the magnetic stirrer Rotate to 200rpm, quickly add 4.455mL of titanium isopropoxide, so that the molar ratio of Ag and Ti in the solution is 1 / 100, after stirring for 30s, the solution is left to settle for 18h. The product and solution were washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high-temperature and high-pressure reactor with polytetrafluoroethylene lining, add 40mL ethanol and 20mL water, place it in a muffle furnace for hydrothermal reaction at 160°C for 18h, and then cool to room temperature to obtain the product Wash with water and absolute ethanol three times respectively to remove possible residual impurities, centrifugally filter, and vacuum-dry at 60°...

Embodiment 2

[0033] At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt%), adjust the magnetic stirrer rotation speed to 500rpm, add 20mL silver nitrate solution, add 1.6mL deionized water at the same time, and finally turn down the magnetic stirrer Rotate to 200rpm, quickly add 4.05mL titanium isopropoxide solution, so that the molar ratio of Ag and Ti in the solution is 10 / 100, after stirring for 30s, the solution is left to settle for 12h. The product and solution were washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high-temperature and high-pressure reactor with a polytetrafluoroethylene liner, add 30mL ethanol and 30mL water, place it in a muffle furnace for hydrothermal reaction at 160°C for 18h, and then cool to room temperature to obtain the product Wash with water and absolute ethanol three times respectively to remove possible residual impurities, centrifugally filter, and vacuu...

Embodiment 3

[0035]At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt%), adjust the rotation speed of the magnetic stirrer to 500rpm, add 0.2mL silver nitrate solution, add 1.6mL deionized water at the same time, and finally turn down the magnetic stirring The rotation speed of the device was increased to 200 rpm, and 4.4955 mL of titanium isopropoxide solution was quickly added to make the molar ratio of Ag and Ti in the solution 0.1 / 100. After stirring for 30 s, the solution was left to settle for 14 h. The product and solution were washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high-temperature and high-pressure reactor with a polytetrafluoroethylene liner, add 40mL of ethanol and 20mL of water, place it in a muffle furnace for hydrothermal reaction at 180°C for 14h, and then cool to room temperature to obtain the product Wash with water and absolute ethanol three times respectively ...

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Abstract

The invention relates to a mesoporous Ag / Ag2O / TiO2 solid microsphere material preparation method, which specifically comprises: dissolving a silver-containing compound, a titanium-containing compound and a surfactant in a solvent, completely stirring, dissolving, carrying out standing settling, carrying out a hydrothermal reaction, washing the obtained product, drying, and calcining in an air atmosphere to obtain the mesoporous Ag / Ag2O / TiO2 solid microsphere material. According to the present invention, the prepared mesoporous Ag / Ag2O / TiO2 microsphere solid material has good repeatability; the morphology of the product is gradually away from the spherical shape along with the increase of the Ag-to-Ti ratio while the mesoporous structure is remained basically; and the final sample has a large specific surface area and more active sites so as to provide a certain promotion effect for the catalytic reaction.

Description

technical field [0001] The invention relates to the technical field of material synthesis, in particular to a mesoporous Ag / Ag 2 O / TiO 2 Preparation method of solid microsphere material. Background technique [0002] In recent years, the use of nano-TiO 2 The purification of organic pollutants has attracted extensive attention of scholars at home and abroad. But the low photon quantum efficiency and slow reaction rate limit TiO 2 Practical progress of photocatalytic technology. How to further improve TiO 2 The photocatalytic activity has become a current active research topic. Existing studies have shown that noble metal-TiO 2 Interfacial Schotty barrier effect in Ag / TiO 2 The effective separation of electrons and holes in the photocatalytic system, and the plasmon resonance effect of Ag particles under the excitation of visible light make it strongly absorb visible light, thereby greatly improving the activity of the composite catalyst. Compared with Au, Pt and Pd,...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J35/08B01J35/10
CPCB01J23/002B01J23/50B01J35/40B01J35/60B01J35/51B01J35/61
Inventor 杨明辉邹明明姜慧芳冯璐
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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