A kind of preparation method and application of defect-rich metal oxide

An oxide and metal technology, applied in the field of functional catalytic material preparation, can solve problems such as safety, economy and environmental protection to be improved, and achieve the effect of enriching catalytic active sites and large electronic structure

Active Publication Date: 2021-11-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of hydrogen, metals, reducing agents, and oxidizing agents, the safety, economy, and environmental protection of the preparation process need to be improved.

Method used

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  • A kind of preparation method and application of defect-rich metal oxide
  • A kind of preparation method and application of defect-rich metal oxide
  • A kind of preparation method and application of defect-rich metal oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh urea and P25 (molar ratio 5:1) and mix them in a stainless steel ball mill tank, add zirconia balls (diameter 3mm, 20g), assemble in a planetary ball mill, set the speed at 450rpm, and the ball mill runs intermittently every 5 minutes , the intermittent time is 2.5 minutes, and the total running time is 4h.

[0029] (2) The ball-milled material is placed in a tubular electric furnace, and under the protection of nitrogen gas with a gas flow rate of 5mL / min, it is raised from room temperature to 900 °C at a rate of 5 °C / min, kept for 60 min, and cooled to room temperature. The gray matter obtained is the defect titanium dioxide material.

Embodiment 2

[0031] (1) Weigh urea and P25 (molar ratio 15:1) and mix them in a stainless steel ball mill tank, add zirconia balls (diameter 3mm, 20g), assemble them in a planetary ball mill, set the speed at 450rpm, and the ball mill runs intermittently every 5 minutes , the intermittent time is 2.5 minutes, and the total running time is 4h.

[0032] (2) The ball-milled material is placed in a tubular electric furnace, and under the protection of nitrogen gas with a gas flow rate of 5mL / min, it is raised from room temperature to 900 °C at a rate of 5 °C / min, kept for 60 min, and cooled to room temperature. The gray matter obtained is the defect titanium dioxide material.

Embodiment 3

[0034] (1) Weigh urea and P25 (molar ratio 30:1) and mix them in a stainless steel ball mill tank, add zirconia balls (diameter 3mm, 20g), assemble in a planetary ball mill, set the speed at 450rpm, and the ball mill runs intermittently every 5 minutes , the intermittent time is 2.5 minutes, and the total running time is 4h.

[0035] (2) The ball-milled material is placed in a tubular electric furnace, and under the protection of nitrogen gas with a gas flow rate of 5mL / min, it is raised from room temperature to 900 °C at a rate of 5 °C / min, kept for 60 min, and cooled to room temperature. The gray matter obtained is the defect titanium dioxide material.

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Abstract

The invention belongs to the field of preparation of catalytic materials, and discloses a process for preparing defect-rich metal oxides by using a small molecule assisted ball milling pyrolysis method such as urea and its application in the deep oxidation desulfurization process of diesel oil. The defect-rich metal oxide is based on metal oxide as raw material, urea, melamine, etc. The characteristics of easy decomposition and gasification at high temperature and lattice reconstruction of metal oxides realize the in-situ etching process of metal oxides, thereby constructing a large number of lattice defects on the surface of metal oxides. The defect-rich metal oxide prepared by the invention has an excellent catalytic effect for activating air to oxidize and remove aromatic sulfides in diesel oil. The preparation process of the method is simple, does not involve the use of strong acid and alkali, hydrogen, and no waste of metal resources, and is a green and pollution-free preparation process.

Description

technical field [0001] The invention relates to the field of preparation of functional catalytic materials, in particular to a method for preparing defect-rich metal oxides and its use for activating aromatic sulfides in air catalytic oxidation diesel oil. Background technique [0002] In recent years, transition metal oxides have attracted the attention of many researchers due to the existence of their non-stoichiometric forms. Today, 2014, 225, 2), and supercapacitors (J. Mater. Chem. A, 2014, 2, 229) and other hot research are widely used. In this type of material, the existence of lattice disorder and defects has a certain modulation effect on the electronic structure of metal oxides, which is of great significance for the improvement of its performance. Common methods for producing defect-type oxides include: hydrogen heat treatment, hydrogen plasma treatment, chemical oxidation and chemical reduction. [0003] Among them, the hydrogen heat treatment method and the hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/10B01J23/06B01J23/14B01J23/28B01J23/30B01J37/08B01J37/16C10G27/04
CPCB01J21/063B01J23/06B01J23/10B01J23/14B01J23/28B01J23/30B01J37/0036B01J37/082B01J37/16C10G27/04C10G2300/202
Inventor 张铭何静朱文帅吴沛文贾清东刘明洋李华明
Owner JIANGSU UNIV
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