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A kind of yttrium-doped zirconia mesoscopic crystal and its preparation method and application

A technology of zirconia mesoscopic and zirconium oxychloride, which is applied in zirconia, chemical instruments and methods, bulk chemical production, etc., to achieve the effects of rich pores, excellent hydrogen production catalytic performance of water gas shift reaction, and high yield

Active Publication Date: 2018-06-05
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the controllable preparation and performance research of functional oxide mesogen materials is still a challenging research topic.
However, there is no yttrium-doped ZrO 2 Public reports on mesoscopic crystals and their preparation techniques and applications

Method used

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  • A kind of yttrium-doped zirconia mesoscopic crystal and its preparation method and application
  • A kind of yttrium-doped zirconia mesoscopic crystal and its preparation method and application
  • A kind of yttrium-doped zirconia mesoscopic crystal and its preparation method and application

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Experimental program
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Embodiment 1

[0024] 0.40 g yttrium nitrate, 16.58 g zirconium oxychloride and 6.31 g urea were dissolved in 50mL deionized water, and stirred at room temperature to prepare a mixed solution (the amount of yttrium nitrate accounted for the total amount of yttrium nitrate and zirconium oxychloride 2%), the above mixed solution was calibrated to 70mL with deionized water and then transferred to a high-temperature reaction kettle with a volume of 100mL. Put the reaction kettle into a blast drying oven, control the reaction temperature to 150° C., and the reaction time to 24 hours. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60° C. for 8 hours to obtain yttrium-doped zirconia mesoscopic crystals.

[0025] figure 1 It is the XRD figure of the yttrium-doped zirconia mesoscopic crystal prepared in this embodiment. Depend on figure 1 It can be seen that the prepared yttrium-doped zirconia is in the monoclinic phase.

[0026] figure 2 , image ...

Embodiment 2

[0030] 1.00 g of yttrium nitrate, 16.07 g of zirconium oxychloride and 6.31 g of urea were dissolved in 50 mL of deionized water, and stirred at room temperature to prepare a mixed solution (the amount of yttrium nitrate accounted for the total amount of yttrium nitrate and zirconium oxychloride 5%), the above mixed solution was calibrated to 70mL with deionized water and then transferred to a high-temperature reaction kettle with a volume of 100mL. Put the reaction kettle into a blast drying oven, control the reaction temperature to 150° C., and the reaction time to 24 hours. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60° C. for 8 hours to obtain yttrium-doped zirconia mesoscopic crystals.

[0031] Figure 5 It is the SEM image of the yttrium-doped zirconia mesoscopic crystal prepared in this embodiment. Figure 5 It shows that the prepared yttrium-doped zirconia particles are also olive-like mesoscopic crystals.

[0032] N...

Embodiment 3

[0034] 2.01 g yttrium nitrate, 15.23 g zirconium oxychloride and 6.31 g urea were dissolved in 50mL deionized water, and after stirring at room temperature, a mixed solution was obtained (the amount of yttrium nitrate accounted for the total amount of yttrium nitrate and zirconium oxychloride 10% of the above), the above mixed solution was calibrated to 70mL with deionized water, and then transferred to a high-temperature reaction kettle with a volume of 100mL. Put the reaction kettle into a blast drying oven, control the reaction temperature to 150° C., and the reaction time to 24 hours. The obtained product was washed by centrifugation to remove impurity ions, and then dried at 60° C. for 8 hours to obtain yttrium-doped zirconia mesoscopic crystals.

[0035] Figure 6 It is the SEM image of the yttrium-doped zirconia mesoscopic crystal prepared in this embodiment. Figure 6 It shows that the prepared yttrium-doped zirconia particles are also olive-like mesoscopic crystals....

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Abstract

The invention discloses an yttrium-doped zirconium dioxide mesoscopic crystal and a preparation method thereof, and belongs to the field of preparation of metal oxide functional materials. Yttrium nitrate, zirconium oxychloride and urea are dissolved in water in proportion to form a mixed solution, and the mixed solution is subjected to a hydrothermal reaction for 24 h at the temperature of 150 DEG C to obtain the yttrium-doped zirconium dioxide mesoscopic crystal. The preparation method is simple and feasible, low in cost, and high in yield of the mesoscopic crystal; the prepared yttrium-doped zirconium dioxide mesoscopic crystal has good monodispersity, is olive-shaped, has porous interior, has the specific surface area up to 150-161 m<2> / g, and is an excellent water gas shift 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 mesoscopic crystal of yttrium-doped zirconia and its preparation method and application. Background technique [0002] Mesoscopic crystals (referred to as mesogens) refer to nanocrystalline superstructures or ordered aggregates formed by the orderly accumulation of nanocrystalline elements in accordance with specific crystal orientations. . Macroscopically, micro-nano crystals are single-crystal due to the orderly epitaxial arrangement of nano-grains; micro-scopically, there are clearly visible interfaces or gaps between nano-grains inside micro-nano crystals. Due to its special structure, mesogenic materials have important application value in industry and become a strong competitor of single crystal and polycrystalline materials. At present, the controllable preparation and performance research of functional oxide mesogen materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G25/02
CPCY02P20/52
Inventor 张燕杰陈崇启詹瑛瑛林棋娄本勇郑国才杨冰
Owner MINJIANG UNIV
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