A kind of aluminothermic reduction ceria octahedral material and its preparation method and application

A technology of ceria and octahedron, which is applied in the field of aluminothermic reduction of ceria octahedron material and its preparation, can solve the problems of poor inherent activity and limitation of large-scale application, and achieve reduced adsorption energy, excellent electrochemical performance, The effect of high sensitivity

Active Publication Date: 2022-04-26
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors have found that although certain oxygen vacancies make CeO 2 Possess active sites, but CeO 2 The disadvantage of poor inherent activity also limits its large-scale application

Method used

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  • A kind of aluminothermic reduction ceria octahedral material and its preparation method and application
  • A kind of aluminothermic reduction ceria octahedral material and its preparation method and application
  • A kind of aluminothermic reduction ceria octahedral material and its preparation method and application

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Embodiment 1

[0058] 1. Thermite reduction of octahedral CeO 2 Preparation of nanocrystalline electrode materials

[0059] a H 2 o 2 Enzyme-free electrochemical sensor electrodes using octahedral CeO after aluminothermic reduction 2 electrode material.

[0060] Preparation steps:

[0061] (1) Octahedral CeO 2 Preparation of Nanocrystalline Materials

[0062] First, 0.08mmol Na 3 PO 4 12H 2 O was dissolved in 64mL deionized water, and after complete dissolution, 8mmol Ce(NO 3 ) 3 ·6H 2 O, magnetically stirred for 1 h, and then the mixture was transferred to a 80 mL Teflon-lined stainless steel autoclave and kept in an oven at 160 °C for 24 h. After the hydrothermal reaction, the mixture at the bottom of the reactor was centrifuged and washed with deionized water and ethanol until neutral. Finally, it was dried in an oven at 80°C for 24h, and then calcined at 600°C at a rate of 2°C / min for 5h to obtain CeO with octahedral morphology. 2 sample.

[0063] (2) Thermite reduction of...

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Abstract

The invention discloses an aluminothermic reduction ceria octahedral material and its preparation method and application. The material has an octahedral single crystal structure, exposes (111) crystal faces, contains oxygen vacancies on the surface, and covers the surface of the octahedral single crystal structure. 1~2nm amorphous layer, the amorphous layer contains oxygen vacancies and Ce 3+ . The preparation method is as follows: adopting a hydrothermal method to prepare octahedral ceria nanocrystals, and performing aluminothermic reduction treatment on octahedral ceria nanocrystals. The material provided by the invention is used to prepare electrodes, has high catalytic activity, high sensitivity, wide linear range, good stability and high selectivity, and the material is proved to be suitable for H in real samples 2 o 2 The detection error is extremely low, which can meet the needs of practical applications.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensor manufacturing, detection and analysis, and relates to an aluminothermic reduced cerium dioxide octahedral material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Crystal surface engineering can enhance catalyst activity by tuning surface electronic structure and properties, which has been widely used. Common surface engineering modification methods include: doping, morphology control, preferential exposure of active crystal planes, defect engineering, and formation of surface heterojunctions. Generally speaking, the optimization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C01F17/235C01F17/10G01N27/48
CPCC01F17/235C01F17/10G01N27/30G01N27/48C01P2004/41C01P2006/40C01P2004/03C01P2004/04
Inventor 王琦汪宙李瞳
Owner SHANDONG UNIV
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