Preparation method of palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres

A ceria, in-situ modification technology, applied in the field of nanomaterials, can solve the problem that high-selectivity electrochemical biosensors cannot be fully satisfied, and achieve the effect of simple operation and mild reaction conditions

Inactive Publication Date: 2021-03-26
UNIV OF JINAN
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Problems solved by technology

However, due to the limitations of its own structure, ceria cannot fully meet the needs of building high-sensitivity and high-selectivity electrochemical biosensors using it as a signal probe.

Method used

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  • Preparation method of palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres
  • Preparation method of palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres
  • Preparation method of palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres

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Embodiment Construction

[0017] A preparation method for palladium in-situ modification of copper-cobalt-doped ceria nanospheres is characterized in that it comprises the following steps:

[0018] (1) Preparation of copper-cobalt double-doped ceria nanospheres: Weigh 500 mg cerium nitrate and 200 mg polyvinylpyrrolidone and dissolve them in 14 mL ethylene glycol solution, stir at a constant speed for 30 min at room temperature, and weigh 160 mg respectively Dissolve copper chloride and 229.44 mg cobalt chloride in 8 mL of ultrapure water and stir to fully dissolve, pipette 0.5 mL of copper chloride and cobalt chloride solution into the ethylene glycol solution of cerium nitrate And continue to stir. After the mixed solution is stirred evenly, transfer the reaction solution to a 20 mL polytetrafluoroethylene-lined autoclave that has been washed and dried, and put it in a drying oven at 160 °C for 8 h at high temperature to ensure After the reaction was complete, it was naturally cooled to room temperat...

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Abstract

The invention provides a preparation method of palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres, and belongs to the technical field of nano material preparation. In the process of the preparation method, a solvothermal method is utilized, ethylene glycol is used as a solvent, and the copper-cobalt double-doped spherical cerium dioxide nanospheres are obtained through a high-temperature and high-pressure reaction; and in-situ modifying of palladium element in Sodium tetrachloropalladate to the surfaces of the copper-cobalt double-doped cerium dioxide nanospheres by using a chemical reduction method is carried out to obtain the palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres. The palladium in-situ modified copper-cobalt doped cerium dioxidenanospheres are regular in morphology and uniform in size and have good dispersity in an organic solvent, and the good microstructure of the palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres is of great significance in improving the catalytic activity of cerium dioxide and enabling the palladium in-situ modified copper-cobalt doped cerium dioxide nanospheres to be of greatsignificance in the structure of an electrochemical biosensor. The great potential of improving the sensitivity of the electrochemical biosensor is realized.

Description

technical field [0001] The present invention relates to a kind of spherical cerium oxide nanoparticles as a template, doped with two elements of copper and cobalt on the surface of spherical cerium oxide nanomaterials, and palladium element in-situ modified nanomaterials, belonging to the field of nanomaterial preparation technology, in particular to A preparation method for palladium in-situ modification of copper-cobalt-doped ceria nanospheres. Background technique [0002] Among metal oxides, ceria has attracted great attention due to its excellent physicochemical properties, including its high optical properties, mechanical strength, oxygen ion conductivity, and high thermal stability. Cerium dioxide has a cubic structure similar to fluorite, and each tetravalent cerium ion is surrounded by eight divalent oxyanions arranged in a face-centered cubic (fcc), and each divalent oxyanion is surrounded by four tetravalent cerium ion tetrahedrons. surrounded. Internal oxygen v...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/08B01J37/08B01J37/16B82Y40/00B82Y30/00
CPCB01J23/894B01J35/0033B01J35/08B01J35/023B01J37/08B01J37/16B82Y40/00B82Y30/00
Inventor 崔康李旭周晨曦于京华
Owner UNIV OF JINAN
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