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Ordered zirconia-alumina mesoporous material and its preparation method

A technology of mesoporous materials, alumina, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low specific surface area and pore volume, and achieve high reproducibility and no environment. Contamination, the effect of simple and easy preparation process

Inactive Publication Date: 2012-03-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZrO prepared by these methods 2 -Al 2 o 3 The materials are all disordered structures with low specific surface area and pore volume

Method used

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  • Ordered zirconia-alumina mesoporous material and its preparation method
  • Ordered zirconia-alumina mesoporous material and its preparation method
  • Ordered zirconia-alumina mesoporous material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] 3.2g EO 106 PO 70 EO 106 and 0.4g of citric acid were added to 20mL of ethanol solution containing 2.0g of 12M hydrochloric acid, stirred at room temperature to completely dissolve the surfactant, and 0.016mol of aluminum isopropoxide and 0.004mol of zirconium oxychloride were added to the system at the same time, at 30 After stirring at °C for 24 hours, the reaction mixture was poured into a Petri dish and treated at 45°C for 48 hours. Finally, the samples were heat-treated at 100°C for 24 hours and fired at 550°C for 5 hours. get ZrO 2 -Al 2 o 3 Mesoporous materials. Nitrogen adsorption results show that the mesopore diameter is 5.5nm and the specific surface area is 265m 2 / g, the pore volume is 0.39cm 3 / g. Calcined at 650°C for 5 hours, the structure and properties did not change.

Embodiment approach 2

[0025] 3.2g EO 106 PO 70 EO 106 and 0.4g of citric acid were added to 20mL of ethanol solution containing 2.0g of 12M hydrochloric acid, stirred at room temperature to completely dissolve the surfactant, and 0.012mol of aluminum isopropoxide and 0.009mol of zirconium oxychloride were added to the system at the same time, at 30 After stirring at °C for 24 hours, the reaction mixture was poured into a Petri dish and treated at 45°C for 48 hours. Finally, the samples were heat-treated at 100°C for 24 hours and fired at 550°C for 5 hours. get ZrO 2 -Al 2 o 3 Mesoporous materials. Nitrogen adsorption results show that the mesopore diameter is 6.2nm and the specific surface area is 238m 2 / g, the pore volume is 0.32cm 3 / g. Calcined at 650°C for 5 hours, the structure and properties did not change.

Embodiment approach 3

[0027] 3.2g EO 106 PO 70 EO 106and 0.4g of citric acid were added to 20mL of ethanol solution containing 2.0g of 12M hydrochloric acid, stirred at room temperature to completely dissolve the surfactant, and 0.008mol of aluminum isopropoxide and 0.012mol of zirconium oxychloride were added to the system at the same time, at 30 After stirring at °C for 24 hours, the reaction mixture was poured into a Petri dish and treated at 45°C for 48 hours. Finally, the samples were heat-treated at 100°C for 24 hours and fired at 550°C for 5 hours. get ZrO 2 -Al 2 o 3 Mesoporous materials. Nitrogen adsorption results show that the mesopore diameter is 6.5nm and the specific surface area is 214m 2 / g, the pore volume is 0.31cm 3 / g. Calcined at 650°C for 5 hours, the structure and properties did not change.

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Abstract

The invention relates to an ordered zirconia-alumina mesoporous material and its preparation method, which belongs to the inorganic porous material and catalyst preparation field. The invention is characterized in that the material has a high and ordered mesoporous structure, its mesoporous diameter is 5.0-8.0nm, the specific surface area is 200-300m<2> / g, and the atomic ratio of Zr to Al of the material is 0.1-1.6. The synthetic method comprises the following steps: dissolving a surfactant, organic carboxylic acid and inorganic acid in an ethanol solution containing a little of deionized water according to the ratio of the synthetic material, adding zirconium source and aluminum source while stirring, continuously stirring for certain time, performing solvent volatilization on the reactant, heat treating and high temperature roasting to obtain the ordered zirconia-alumina mesoporous material. The invention has the advantages of simple process, high repetition rate and environmental protection.

Description

technical field [0001] The invention discloses an ordered zirconia-alumina mesoporous material and a preparation method thereof, belonging to the field of preparation of inorganic porous materials and catalysts. Specifically, it relates to a ZrO with high specific surface area and pore volume, adjustable Zr / Al atomic ratio, and highly ordered mesoporous structure. 2 -Al 2 o 3 Mesoporous materials and methods for their preparation. Background technique [0002] The use of solid acid catalysts can avoid traditional liquid acids such as HF, H 2 SO 4 and H 3 PO 4 It is highly toxic and corrosive, and has the characteristics of easy separation and recycling. However, the current acidic catalysts represented by sulfurized zirconia are far from reaching the catalytic efficiency of liquid acids. Zirconia is a multifunctional catalyst carrier with moderate acidity and alkalinity, which can become a strong solid acid through sulfation, phosphorylation or tungstatement. Sulfur...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J27/053B01J35/10
Inventor 李瑞丰潘大海马静红崔丽萍王小燕郭敏
Owner TAIYUAN UNIV OF TECH
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