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A kind of zirconium dioxide mesoscopic crystal and its preparation method and application

A technology of zirconia mesoscopic and zirconium oxychloride, which is applied in the fields of zirconia, chemical instruments and methods, bulk chemical production, etc., can solve the problems such as public reports of zirconia mesoscopic crystal preparation technology, and achieve excellent production Hydrogen catalytic performance, high yield, and good crystallinity

Active Publication Date: 2018-03-16
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no public reports on zirconia mesoscopic crystals and their preparation techniques

Method used

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  • A kind of zirconium dioxide mesoscopic crystal and its preparation method and application
  • A kind of zirconium dioxide mesoscopic crystal and its preparation method and application
  • A kind of zirconium dioxide mesoscopic crystal and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 9.02 g of zirconium oxychloride in 50 mL of deionized water, calibrate the above solution to 70 mL with deionized water, and then transfer it to a high-temperature reactor with a volume of 100 mL (that is, the molar concentration of zirconium oxychloride is 0.4 mol / L , the molar ratio of cetyltrimethylammonium bromide to zirconium oxychloride is 0:1). 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 ZrO 2 mesoscopic crystals.

[0025] 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 that the prepared ZrO 2 Was monoclinic phase.

[0026] figure 2 , image 3 These are the SEM images and TEM images of the zirconia mesoscopic crystals prepared in this example, respectively...

Embodiment 2

[0030] Dissolve 4.59 g of cetyltrimethylammonium bromide and 10.15 g of zirconium oxychloride in 50 mL of deionized water to prepare a mixed solution. The above mixed solution is calibrated to 70 mL with deionized water and then transferred to a volume of 100 mL of high-temperature reactor (that is, the molar concentration of zirconium oxychloride is 0.45 mol / L, and the molar ratio of cetyltrimethylammonium bromide to zirconium oxychloride is 0.4:1). The reaction kettle was put into a blast drying oven, the reaction temperature was controlled at 145 °C, and the reaction time was 8 h. The obtained product was washed by centrifugation to remove impurity ions and then dried at 60 °C for 8 h to obtain ZrO 2 mesoscopic crystals.

[0031] Figure 5 SEM image of zirconia mesoscopic crystals prepared for this example. Figure 5 shows that the prepared ZrO 2 The particles are also nano-disc-like mesoscopic crystals.

[0032] N 2 -Physical adsorption and desorption experiments sho...

Embodiment 3

[0034] Dissolve 2.55 g of cetyltrimethylammonium bromide and 11.28 g of zirconium oxychloride in 50 mL of deionized water to prepare a mixed solution. The above mixed solution is calibrated to 70 mL with deionized water and then transferred to a volume of 100 mL of high-temperature reactor (that is, the molar concentration of zirconium oxychloride is 0.5 mol / L, and the molar ratio of cetyltrimethylammonium bromide to zirconium oxychloride is 0.2:1). The reaction kettle was put into a blast drying oven, the reaction temperature was controlled at 155 °C, and the reaction time was 5 h. The obtained product was washed by centrifugation to remove impurity ions and then dried at 60 °C for 8 h to obtain ZrO 2 mesoscopic crystals.

[0035] Figure 6 SEM image of zirconia mesoscopic crystals prepared for this example. Figure 6 shows that the prepared ZrO 2 The particles are also nano-disc-like mesoscopic crystals.

[0036] N 2 -Physical adsorption and desorption experiments show...

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Abstract

The invention discloses a zirconium dioxide mesoscopic crystal and a preparation method and application thereof, and belongs to the field of metal oxide functional material preparation. Hexadecyl trimethyl ammonium bromide and zirconium oxychloride are proportionally dissolved into water to form a mixed solution; a hydro-thermal reaction is performed at 145 to 150 DEG C for 5 to 8 hours to prepare the zirconium dioxide mesoscopic crystal. The preparation method is simple and convenient; the implementation is easy; the cost is low; the yield of the mesoscopic crystal is high; the prepared mesoscopic crystal has good monodispersity, and is in a nanometer round sheet shape; many holes are formed at the interior; the BET specific surface area is as high as 152 to 158 m<2> / g, and the irconium dioxide mesoscopic crystal belongs to a good 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 zirconia mesoscopic crystal and a preparation method and application thereof. Background technique [0002] Zirconia (ZrO 2 ) has unique physical and chemical properties. It is the only metal oxide with four properties of surface acidity, surface basicity, oxidation and reduction. Phase transformation between the three crystal phases. These special properties make it widely used as a catalyst carrier, and even show better catalytic performance than traditional silica, alumina and other carriers in many fields. Therefore, catalysts prepared on the basis of zirconia have received more and more attention. [0003] Mesoscopic crystals (referred to as mesogens) are nanocrystalline superstructures formed by the orderly stacking of nanocrystalline units according to specific crystal orientations. There are usually a large number of stacked ...

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 张燕杰林棋娄本勇郑国才
Owner MINJIANG UNIV
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