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Mesoporous aluminum phosphate glass with large specific surface area and preparation method thereof

A technology of mesoporous aluminum phosphate glass and high specific surface area, which is applied in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc. It can solve the problem of poor optical performance of aluminum phosphate, which is difficult to meet the application of high-temperature catalysts and catalyst carriers, and difficult to meet the optoelectronic field. Use and other issues

Inactive Publication Date: 2010-08-04
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching by the inventors, it has been found that Campelo et al. used aluminum isopropoxide and phosphate as precursors to synthesize amorphous mesoporous aluminum phosphate by sol-gel method, but the optical properties of the aluminum phosphate were poor, and the specific surface area was up to 250m 2 / g, and the final composition is heterogeneous, including AlPO 4 , Al 2 o 3 and Al(PO 3 ) 3 Equal phase, poor uniformity, difficult to meet the application of high-temperature catalysts and catalyst carriers, difficult to meet the application in the field of optoelectronics, especially not as a carrier for laser dyes

Method used

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  • Mesoporous aluminum phosphate glass with large specific surface area and preparation method thereof
  • Mesoporous aluminum phosphate glass with large specific surface area and preparation method thereof
  • Mesoporous aluminum phosphate glass with large specific surface area and preparation method thereof

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Effect test

Embodiment 1

[0023] According to the technical scheme of the present invention, 0.004 mol of aluminum lactate is added into 16 ml of deionized water respectively, and 0.004 mol of orthophosphoric acid solution is added under stirring with a magnetic stirrer. Adjust the pH to 2.40 with 0.50 mol / L dilute ammonia water, and then stir for 2 hours with a magnetic stirrer. The stirred solution was transferred to a watch glass, allowed to stand at room temperature for 1 day, and then transferred to a 50°C oven to dry for 2 weeks. Put the dried sample into a muffle furnace for heat treatment in a corundum crucible, raise the temperature from room temperature to 600°C at a heating rate of 0.5°C / min, and keep it at 600°C for 6 hours to obtain a colorless and transparent mesoporous aluminophosphate glass . Analyze its specific surface area with Brunauer-Emmett-Teller (hereinafter all referred to as BET) specific surface area measuring instrument is 464m 2 / g, the average pore diameter of mesopores ...

Embodiment 2

[0027] According to the technical scheme of the present invention, 0.004 mol of aluminum lactate is added into 24 ml of deionized water respectively, and 0.004 mol of orthophosphoric acid solution is added under stirring with a magnetic stirrer. Then use 1.0 mol / L dilute ammonia water to adjust the pH=2.8, and then use a magnetic stirrer to stir for 4 hours. The stirred solution was transferred to a watch glass, allowed to stand at room temperature for 2 days, and then transferred to a 70 °C oven for 4 days to dry. Put the dried sample into a muffle furnace for heat treatment in a corundum crucible, raise the temperature from room temperature to 650°C at a heating rate of 1°C / min, and keep it at 650°C for 8 hours to obtain a colorless and transparent mesoporous aluminophosphate glass . Analyze its specific surface area with BET specific surface area measuring instrument to be 426m 2 / g, the average pore diameter of mesopores is 3.62nm.

Embodiment 3

[0029] According to the technical scheme of the present invention, 0.004 mol of aluminum lactate is added into 32 ml of deionized water respectively, and 0.004 mol of orthophosphoric acid solution is added under stirring with a magnetic stirrer. Then use 1.5 mol / L dilute ammonia water to adjust the pH=3.0, and then use a magnetic stirrer to stir for 8 hours. The stirred solution was transferred to a watch glass, allowed to stand at room temperature for 4 days, and then transferred to an 85°C oven to dry for 1 week. Put the dried sample into a muffle furnace for heat treatment in a corundum crucible, raise the temperature from room temperature to 700°C at a heating rate of 1.5°C / min, and keep it at 700°C for 10 hours to obtain a colorless and transparent mesoporous aluminophosphate glass . Analyze its specific surface area with BET specific surface area measuring instrument to be 406m 2 / g, the average pore diameter of mesopores is 5.24nm.

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Abstract

The invention relates to mesoporous aluminum phosphate glass with large specific surface area and a preparation method thereof. The glass is prepared from AlPO4. The preparation method of the mesoporous aluminum phosphate glass with large specific surface area comprises the following steps of: dissolving aluminum lactate and orthophosphoric acid as precursors in deionized water; then, adjusting a pH range to 2.00 to 4.00 with ammonia; standing at a room temperature for gelation; drying the gel in an oven; and thermally processing the gel in a muffle furnace into mesoporous aluminum phosphate glass. Proved by tests, the glass has the glass transition temperature Tg higher than or equal to 1000 DEG C, the specific surface area SBET larger than 400 m<2> / g and the average mesoporous diameter dp equal to 2.0-8.0 nm, thereby being the mesoporous glass with large specific surface area.

Description

technical field [0001] The invention relates to glass, in particular to a high specific surface area mesoporous aluminum phosphate glass and a preparation method thereof. Background technique [0002] Aluminum phosphate materials are widely used in the petroleum industry. They are commonly used catalysts for petroleum decomposition, alkylation and alkylation, and are also excellent carriers for catalysts such as nickel or vanadium. Common aluminum phosphate materials are mesoporous aluminum phosphate molecular sieves, which are widely used in ion exchange and adsorbents, but aluminum phosphate molecular sieves are often dispersed powders, which cannot meet optical applications. Considering the excellent chemical stability, low refractive index and high temperature stability of mesoporous aluminum phosphate materials, it is likely to be used in optoelectronics-related fields, such as dye gain carriers for solid-state dye lasers, sensors and optical communications. Especially...

Claims

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Application Information

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IPC IPC(8): C03C3/17C03B1/00C03B5/16
Inventor 张龙李日红
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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