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A large specific surface porous zirconia mesoscopic crystal and its preparation method and application

A zirconia mesoscopic and large specific surface technology, applied in zirconia, chemical instruments and methods, catalyst activation/preparation, etc., to achieve the effects of high yield, abundant pores, and excellent catalytic performance

Active Publication Date: 2018-07-20
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the controllable preparation and performance research of functional oxide mesogen materials is still a challenging research topic.

Method used

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  • A large specific surface porous zirconia mesoscopic crystal and its preparation method and application
  • A large specific surface porous zirconia mesoscopic crystal and its preparation method and application
  • A large specific surface porous zirconia mesoscopic crystal and its preparation method and application

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Embodiment 1

[0023] Dissolve 3.50 g of polyethylene glycol 2000, 11.28 g of zirconium oxychloride octahydrate and 4.20 g of urea in 50 mL of deionized water to prepare a mixed solution. The above mixed solution was calibrated to 70 mL with deionized water and transferred to a volume of In a 100 mL high-temperature reactor (that is, the molar concentration of zirconium oxychloride octahydrate is 0.5 mol / L, the amount of polyethylene glycol 2000 added is 0.05 g per milliliter of mixed solution, and the molar ratio of zirconium oxychloride octahydrate to urea is 1:2). The reaction kettle was put into a blast drying oven, the reaction temperature was controlled at 150 °C, and the reaction time was 6 h. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60°C for 8 h to obtain mesoscopic crystals of zirconia.

[0024] figure 1 It is the XRD figure of the zirconia mesoscopic crystal prepared in the present embodiment. Depend on figure 1 It can be seen...

Embodiment 2

[0029] Dissolve 7.00 g of polyethylene glycol 2000, 11.28 g of zirconium oxychloride octahydrate and 4.20 g of urea in 50 mL of deionized water to prepare a mixed solution. The above mixed solution is calibrated to 70 mL with deionized water and transferred to a volume of In a 100 mL high-temperature reactor (that is, the molar concentration of zirconium oxychloride octahydrate is 0.5 mol / L, the amount of polyethylene glycol 2000 added is 0.1 g per milliliter of mixed solution, and the molar ratio of zirconium oxychloride octahydrate to urea is 1:2). The reaction kettle was put into a blast drying oven, the reaction temperature was controlled at 150 °C, and the reaction time was 6 h. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60°C for 8 h to obtain mesoscopic crystals of zirconia.

[0030] Figure 5 It is the SEM figure of the zirconia mesoscopic crystal prepared in the present embodiment. Figure 5 It shows that the prepare...

Embodiment 3

[0033] 14.00 g of polyethylene glycol 2000, 11.28 g of zirconium oxychloride octahydrate and 4.20 g of urea were dissolved in 50 mL of deionized water to prepare a mixed solution, and the above mixed solution was calibrated to 70 mL with deionized water and transferred to a volume of In a 100 mL high-temperature reactor (that is, the molar concentration of zirconium oxychloride octahydrate is 0.5 mol / L, the amount of polyethylene glycol 2000 added is 0.2 g per milliliter of mixed solution, and the molar ratio of zirconium oxychloride octahydrate to urea is 1:2). The reaction kettle was put into a blast drying oven, the reaction temperature was controlled at 150 °C, and the reaction time was 6 h. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60°C for 8 h to obtain mesoscopic crystals of zirconia.

[0034] Figure 6 It is the SEM figure of the zirconia mesoscopic crystal prepared in the present embodiment. Figure 6 It shows that...

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Abstract

The invention discloses a large-specific-surface porous zirconium dioxide mesoscopic crystal, a preparation method thereof and an application, and belongs to the preparation field of a metal oxide functional material. The preparation method includes steps of dissolving polyethylene glycol 2000, zirconylchloride octahydrate and urea at a ratio, and forming a mixed solution; performing hydrothermal reaction for 6 h at 150 DEG C; preparing the zirconium dioxide mesoscopic crystal. The preparation method is simple and easy to practice, and low in cost and high in mesoscopic crystal yield; the prepared zirconium dioxide mesoscopic crystal; the prepared zirconium dioxide mesoscopic crystal has good mono-dispersity, and is in the shape of olive; the inner part is porous; the BET specific surface area is up to 120-153 m2 / g; therefore, the zirconium dioxide mesoscopic crystal is an excellent water gas conversion catalyst carrier.

Description

technical field [0001] The invention belongs to the field of preparation of metal oxide functional materials, and in particular relates to a large specific surface porous zirconia mesoscopic crystal and a preparation method and application thereof. Background technique [0002] Mesoscopic crystals (referred to as mesogens) refer to nanocrystalline superstructures or ordered aggregates formed by orderly stacking nanocrystalline elements according to specific crystal orientations. extensive attention. This kind of crystalline material between single crystal and polycrystalline structure has the characteristics of high crystallinity, high porosity and orderly arrangement of subunits. It is used in catalysis, sensing, optoelectronic devices, biomedical materials It has broad application prospects in many fields such as energy storage and conversion, and has become a strong competitor for single crystal and polycrystalline materials. At present, the controllable preparation and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/10B01J37/10C01B3/16B01J32/00C01G25/02
CPCY02P20/52
Inventor 张燕杰林棋娄本勇郑国才
Owner MINJIANG UNIV
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