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Quantitatively treating method by diamond anvil cell

A diamond anvil and processing technology, which is applied in the application of ultra-high pressure process, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of low efficiency, high power consumption, low power consumption, etc., and achieve increased Scale, low power consumption, high efficiency effect

Active Publication Date: 2019-11-08
南京宁智高新材料研究院有限公司
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  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems of low efficiency and high power consumption in the "bottom-up" method of limiting crystal growth and the "top-down" particle etching technology in the prior art, this paper The invention proposes a quantitative treatment process through the diamond anvil. Compared with the "bottom-up" method of limiting crystal growth and the "top-down" particle etching technology, the invention has a simple operation method and consumes less power during the process. lower, more efficient

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Embodiment 1

[0022] Such as figure 1 As shown, the cerium oxide nanoparticles with an initial average particle size of 80nm are selected; under normal temperature conditions, a diamond anvil with a diameter of 300 microns is used to hold the cerium oxide nanoparticles with an average particle size of 80nm; the holding pressure is 15GPa± 0.75GPa; apply a small increase in pressure cycle or decompression cycle, the range of increase and decrease is ± 5%; after 100 cycles, use transmission electron microscopy to characterize the exposed crystal planes, and the characterization results show that before high pressure treatment, After that, the exposed surface of {100} in the sample increased significantly, which proved that the high-pressure treatment process effectively increased the exposed surface of {100}; the catalytic efficiency experiment was carried out using the treated cerium oxide nanoparticles, and the catalytic efficiency in the treated sample was improved. 15%; the nano-cerium oxi...

Embodiment 2

[0024] Such as figure 2 As shown, the cerium oxide nanoparticles with an initial average particle size of 200nm are selected; under normal temperature conditions, a diamond anvil with a diameter of 300 microns is used to hold the cerium oxide nanoparticles with an average particle size of 80nm; the holding pressure is 5GPa± 0.25GPa; apply a small increase in pressure cycle or decompression cycle, the range of increase and decrease is ± 5%; after 100 cycles, use transmission electron microscopy to characterize the exposed crystal planes, and the characterization results show that before high pressure treatment, After that, the exposed surface of {110} in the sample increased significantly, which proved that the high-pressure treatment process effectively increased the exposed surface of {110}; the catalytic efficiency experiment was carried out using the treated cerium oxide nanoparticles, and the catalytic efficiency in the treated sample was improved. 7%; the nano-cerium oxi...

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Abstract

A quantitatively treating method by a diamond anvil cell comprises that follow specific steps: selecting nanometer cerium oxide having a specific particle size; at room temperature and high pressure,using the diamond anvil cell to apply a small amplitude pressurization cycle or a reduced pressure cycle to the nanometer cerium oxide having the specific particle size; obtaining a {100} or {110} highly active exposure surface on the surface of the nanometer cerium oxide; characterizing the exposed surfaces by transmission electron microscope, and obtaining the characterizing results; using a small amount of treated cerium oxide nanoparticles to carry out the catalytic efficiency experiment, and obtaining the experimental results. The nanometer cerium oxide with a specific particle size in S1has a size of magnitude of 1 to 100 nm. The amplitude of pressure cycle or pressure reduction cycle applied in S2 is +-1%-+-10%. The pressure of high pressure treatment in S2 is in magnitude of 1-100GPa. The number of pressurization or decompression cycles in S2 is in the magnitude of 10-1000.

Description

technical field [0001] The invention relates to the technical field of catalyst production technology, in particular to a quantitative treatment process through a diamond anvil. Background technique [0002] Cerium oxide catalysts are widely used in the field of catalysis, and the catalytic activity of different exposed surfaces varies greatly. Therefore, it is of great application value to control the catalyst preparation and treatment process of the exposed surfaces of cerium oxide catalyst crystals. Nano-oxide catalysts have a huge specific surface area. In recent years, with the gradual maturity of the preparation process of nano-oxides, a large number of nano-oxides have been used in various catalytic fields. At present, most of the cerium oxide catalysts widely used in the industry are nanometer (1-100nm scale) cerium oxide. } or {100} faces. Therefore, in the past ten years, using various physical and chemical means to increase the ratio of {110} or {100} exposed sur...

Claims

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Application Information

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IPC IPC(8): B01J3/08B01J23/10B01J37/00
CPCB01J3/08B01J23/10B01J37/00
Inventor 邓昱赵赟雷朱吉慧陈传露李朵
Owner 南京宁智高新材料研究院有限公司
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