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Manufacturing process of nano catalyst base material with efficient catalytic function

A process technology and functional nanotechnology, which is applied in the field of process technology with high-efficiency catalytic nano-catalyst substrates, can solve the problems of difficult control of process parameters, coating of nano-active particles, and low reproducibility, achieving high reproducibility, Easy to control and good market prospects

Inactive Publication Date: 2020-07-14
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is likely to cause the nano-active particles to be covered by the substrate material and lose the catalytic effect.
Or precisely control the concentration of the precipitate solution and the precipitant solution, and carefully control the temperature, so that the precipitation reaction shows rapid nucleation, and at the same time the crystal grows slowly to maintain the nanoscale, but the process parameters of this method are difficult to control and the reproducibility is not high.

Method used

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  • Manufacturing process of nano catalyst base material with efficient catalytic function
  • Manufacturing process of nano catalyst base material with efficient catalytic function
  • Manufacturing process of nano catalyst base material with efficient catalytic function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A manufacturing process of a nano-catalyst substrate with high-efficiency catalytic function includes the following steps:

[0046] (1) Put ZrO(NO 3 ) 2 ·2H 2 O(0-0.2g), Ni(NO 3 ) 2 ·6H 2 O(0-0.3g), Cu(NO 3 ) 2 ·3H 2 O(0.05-0.3g), AgNO 3 (0.05-0.3g), Zn(NO 3 ) 2 ·6H 2 O(0-0.15g), Ti(OC 4 H 9 ) 4 (0.05-0.3g) dissolved in 100mL of deionized water, add 10-20% of the total moles of metal compound metal ions into the deionized water, 16mol / L concentrated nitric acid to help dissolve and prepare an aqueous solution of 0.5mol / L catalyst particle reagent, The porous metal fiber mesh substrate is immersed in the aqueous solution of the catalyst particle reagent for 0.5h.

[0047] (2) Prepare precipitant 0.5mol / L NH 4 The OH aqueous solution is placed in the ultrasonic tank.

[0048] (3) Put the porous metal fiber mesh substrate into the precipitation agent aqueous solution and start the ultrasound at the same time to make the metal hydroxide precipitate in the substrate. At the same ti...

Embodiment 2-6

[0052] Except that the heat treatment temperature is different, the manufacturing process is the same as in Example 1. The specific heat treatment temperature is shown in the following table:

[0053] Heat treatment temperature (℃) Example 2500 Example 3800 Example 41000 Example 51200 Example 6 1400

[0054] Such as figure 1 Shown are the effects of each heat treatment temperature in Examples 1-6 on the size of the nanocatalyst particles. figure 1 It can be seen that the heat treatment temperature below 800°C can maintain the appropriate nanometer scale. The heat treatment temperature above 300°C is used to remove residual organic matter.

Embodiment 7-10

[0056] Except that the concentration of the aqueous solution of the catalyst particle reagent is different, the manufacturing process is the same as in Example 1. The specific method for preparing the aqueous solution of the catalyst particle reagent is shown in the following table:

[0057]

[0058] Such as figure 2 Shown is the relationship between the concentration of the catalyst particle reagent in the aqueous solution and the specific surface area of ​​the finished porous catalyst substrate. The concentration of the catalyst reagent in the aqueous solution is 0.05 to 0.5 mol / L and the total surface area is increasing, but the concentration is observed by the specific surface area analyzer In the range of 0.3 to 0.5mol / L, the total surface area rises slowly, so the upper limit of the concentration of the catalyst reagent aqueous solution is set at 0.5mol / L.

[0059] The embodiment of the present invention also provides a manufacturing process of a nanocatalyst substrate that c...

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Abstract

The invention discloses a manufacturing process of a nano catalyst base material with an efficient catalytic function. According to the manufacturing process, a novel precipitation method is matched with ultrasonic crushing to synthesize nano catalyst particles. According to the process, an aqueous solution of a catalyst particle reagent and an aqueous solution of a precipitant are split into twosystems, a porous base material is soaked in the aqueous solution of the catalyst particle reagent, and the aqueous solution of the precipitant is placed in an ultrasonic tank. The soaked porous basematerial is taken out and the porous base material is quickly put into a precipitant aqueous solution while starting ultrasonic waves; the porous base material adhered with the catalyst particle reagent aqueous solution enables precipitates to be concentrated in the base material; in addition, the ultrasonic wave assists in crushing and oscillating precipitated particles to avoid further agglomeration of the particles; and finally, the nano particles are uniformly dispersed on any surface inside and outside the base material through proper heat treatment temperature in a reduction environment,so that the effect of increasing the surface chemical reaction area is achieved, and the nano catalyst base material with a high catalytic reaction surface area is obtained.

Description

Technical field [0001] The invention relates to the technical field of catalyst substrate preparation, in particular to a process technology for a nano-catalyst substrate with high-efficiency catalytic function. Background technique [0002] As the global population continues to rise and the population density is increasing year by year, modern society is facing various energy and environmental problems. In terms of energy, finding alternative energy sources to effectively use sunlight for energy conversion is currently an important research field, and the reaction mechanism of catalyzing hydrogen production is one of its key technologies; in terms of environment, especially in the field of public health, with the global population Due to the rise and the concentration of urbanization population density, the use of photocatalyst and surface chemical technology to improve the prevention and control of infectious diseases has attracted much attention. The surface catalytic reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10B01J37/03B01J37/34H01M4/88H01M4/90A01N25/08A01N59/20A01N59/16A01P1/00A01P7/02
CPCB01J37/035B01J37/343B01J23/8953H01M4/8825H01M4/9075A01N25/08A01N59/20A01N59/16B01J35/60Y02E60/50
Inventor 温良成曹更玉
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH