Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of spherical structure cexzr1-xo2 powder

A spherical structure, powder technology, applied in the field of micro-nano material preparation, can solve the problems of decreased catalytic ability, serious agglomeration, poor powder dispersion, etc., and achieves easy control of operation, controllable particle size, and low cost of raw materials. Effect

Active Publication Date: 2018-04-13
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in many Ce reported so far x Zr 1-x o 2 In the preparation method, the prepared Ce x Zr 1-x o 2 The dispersion of the powder is not good, and the agglomeration is serious, and the agglomeration leads to a low specific surface area, so the Ce cannot be exerted. x Zr 1-x o 2 The good oxygen storage and release capacity of the material itself, coupled with the aggregates, sharply reduces the catalytic active sites of the material itself, resulting in a decrease in the catalytic ability of the material itself

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of spherical structure cexzr1-xo2 powder
  • A kind of preparation method of spherical structure cexzr1-xo2 powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Measure 20 mL of deionized water into a three-necked flask, then move the three-necked flask to a magnetic heating stirrer, add 0.2 g of polyvinylpyrrolidone, 0.3 g of citric acid and 0.1 g of sodium persulfate into the three-necked flask, and stir After 20 minutes, 2 mmol of zirconium nitrate and 8 mmol of cerium nitrate were added, stirred for another 20 minutes, and finally ammonia water was added to obtain a mixed solution with a pH value of 4.

[0018] (2) Insert an ultrasonic probe into the mixed solution prepared in step (1), set the ultrasonic power to 20 W, the stirring rate of the magnetic heating stirrer to be 150 rpm, and the heating rate of the mixed solution to be 3 °C / min, The mixed solution was heated to 60° C. for 30 minutes, and after the reaction was completed, it was cooled to room temperature to obtain a suspension.

[0019] (3) Pour the suspension prepared in step (2) into a 100 mL hydrothermal kettle, then transfer the hydrothermal kettle to a...

Embodiment 2

[0022] (1) Measure 80 mL of deionized water into a three-necked flask, then move the three-necked flask to a magnetic heating stirrer, add 1 g of polyvinylpyrrolidone, 1 g of citric acid and 0.7 g of sodium persulfate into the three-necked flask, and stir for 120 Minutes, then add 8 mmol zirconium acetate and 2 mmol cerium acetate, stir for another 120 minutes, and finally add ammonia water to prepare a mixed solution with a pH value of 9.

[0023] (2) Insert an ultrasonic probe into the mixed solution prepared in step (1), set the ultrasonic power to 80 W, the stirring rate of the magnetic heating stirrer to be 350 rpm, and the heating rate of the mixed solution to be 10 °C / min, The mixed solution was heated to 80° C. for 30 minutes, and after the reaction was completed, it was cooled to room temperature to obtain a suspension.

[0024] (3) Pour the suspension prepared in step (2) into a 100 mL hydrothermal kettle, then transfer the hydrothermal kettle to a drying oven, set i...

Embodiment 3

[0027] (1) Measure 50 mL of deionized water into a three-necked flask, then move the three-necked flask to a magnetic heating stirrer, add 0.5 g of polyvinylpyrrolidone, 0.5 g of citric acid and 0.5 g of sodium persulfate into the three-necked flask, and stir 60 minutes, then add 5 mmol zirconium oxychloride and 5 mmol cerium sulfate, stir for another 60 minutes, and finally add ammonia water to prepare a mixed solution with a pH value of 5.

[0028](2) Insert an ultrasonic probe into the mixed solution prepared in step (1), set the ultrasonic power to 60 W, the stirring rate of the magnetic heating stirrer to be 300 rpm, and the heating rate of the mixed solution to be 5 °C / min, The mixed solution was heated to 75°C for 20 minutes and reacted for 20 minutes. After the reaction was completed, it was cooled to room temperature to obtain a suspension.

[0029] (3) Pour the suspension prepared in step (2) into a 100 mL hydrothermal kettle, then transfer the hydrothermal kettle to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of spherical structure CexZr1‑xO2 powder. Add zirconium salt and cerium salt into the aqueous solution in which polyvinylpyrrolidone, citric acid and ammonium persulfate are dissolved according to the rated molar amount, stir to dissolve, adjust the pH value of the solution with ammonia water, insert an ultrasonic probe into the solution, and set the rated Ultrasonic power, stirring rate, heating rate, reaction temperature and reaction time, after the end of the reaction, cool to room temperature to obtain a suspension, then transfer the suspension to a hydrothermal kettle and react at a rated reaction temperature for a rated time to obtain a precursor product. The precursor product after centrifugal washing is sintered to obtain spherical structure CexZr1‑xO2 powder. The operation of the method of the invention is easy to control, the cost of required raw materials is low, the prepared powder has a spherical structure and is uniformly dispersed, and the particle size is controllable.

Description

technical field [0001] The invention belongs to the technical field of preparation of micro-nano materials. Especially related to a spherical structure Ce x Zr 1-x o 2 The preparation method of powder, the prepared Ce x Zr 1-x o 2 The powder can be used as a catalyst carrier for hydrogen production by steam reforming of alcohols, and can also be used as a catalyst material for automobile exhaust. Background technique [0002] Human beings have been committed to the research and development of clean new energy since entering the 21st century, and hydrogen energy, as an ideal clean energy, has attracted the attention of researchers. Among the many hydrogen production methods at present, there are several mainstream hydrogen production methods, mainly solar photocatalytic hydrogen production, biological hydrogen production, plasma hydrogen production, electrolysis of water hydrogen production, chemical hydrogen production and so on. However, the efficiency of solar photo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/00B01D53/94B01J23/10
CPCB01D53/94B01D2258/01B01J23/10B01J35/08C01G25/00C01P2002/72C01P2004/03C01P2004/32C01P2004/61
Inventor 郑国源龙飞武晓鹂何金云
Owner GUILIN UNIVERSITY OF TECHNOLOGY