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Porous NiO/CeO2 hybrid nanosheet array, and preparation method and application thereof

A nano-sheet array and nano-sheet technology are applied in the field of porous NiO/CeO2 hybrid nano-sheet arrays and their preparation to achieve the effect of being beneficial to large-scale preparation

Active Publication Date: 2015-05-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the metal oxide matrix materials used in biosensors are mainly single-phase materials, and there are few reports on metal oxide hybrid materials used as biosensor matrix materials.

Method used

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  • Porous NiO/CeO2 hybrid nanosheet array, and preparation method and application thereof
  • Porous NiO/CeO2 hybrid nanosheet array, and preparation method and application thereof
  • Porous NiO/CeO2 hybrid nanosheet array, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. NiO / CeO 2 Preparation of Nanosheet Array Precursor

[0022] (1) Put nickel foam (2cm*3cm) purchased from the market into 3 mol / L hydrochloric acid and ultrasonically clean it for 30 minutes to remove the oxide layer on the surface, and then use deionized water and absolute ethanol to clean it alternately;

[0023] (2) Dissolve 0.152g of cerium nitrate, 0.026g of ammonium fluoride and 0.1051g of urea in 35 mL of distilled water to form a mixed solution and transfer it to an autoclave;

[0024] (3) Put the nickel foam obtained in step 1 into an autoclave containing the mixed solution obtained in step 2, seal it and perform hydrothermal treatment in an oven at 120°C for 12 hours;

[0025] 2. Porous NiO / CeO 2 Fabrication of nanosheet arrays

[0026] The sample obtained after hydrothermal treatment is calcined in air atmosphere, the calcination temperature is 500°C, and the holding time is 2 hours, and the porous NiO / CeO can be obtained. 2 Nanosheet arrays.

[0027] ...

Embodiment 2

[0029] 1. NiO / CeO 2 Preparation of Nanosheet Array Precursor

[0030] (1) Put nickel foam (2cm*3cm) purchased from the market into 3 mol / L hydrochloric acid and ultrasonically clean it for 30 minutes to remove the oxide layer on the surface, and then use deionized water and absolute ethanol to clean it alternately;

[0031] (2) Dissolve 0.152g of cerium nitrate, 0.026g of ammonium fluoride and 0.1051g of urea in 35 mL of distilled water to form a mixed solution and transfer it to an autoclave;

[0032] (3) Place the nickel foam obtained in step (1) in an autoclave containing the mixed solution obtained in step (2), seal it and perform hydrothermal treatment in an oven at 140°C for 12 hours;

[0033] 2. Porous NiO / CeO 2 Fabrication of nanosheet arrays

[0034] The sample obtained after hydrothermal treatment is calcined in air atmosphere, the calcination temperature is 500°C, and the holding time is 2 hours, and the porous NiO / CeO can be obtained. 2 Nanosheet arrays.

[00...

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Abstract

The invention discloses a porous NiO / CeO2 hybrid nanosheet array, and a preparation method and application thereof. The method comprises the following steps: putting foam nickel cleaned by hydrochloric acid into a mixed solution containing cerium nitrate, ammonium fluoride and urea, and carrying out hydrothermal reaction at different temperatures to obtain a NiO / CeO2 hybrid nanosheet array precursor; and calcining the precursor in air to prepare the porous NiO / CeO2 hybrid nanosheet array, wherein the thickness of the porous NiO / CeO2 hybrid nanosheets is 10-25nm or so, and the diameter of pores in the nanosheets is 5-40nm. The hybrid nanosheet array has favorable electrochemical properties, and can be used as a base material of a biosensor.

Description

technical field [0001] The invention relates to a porous NiO / CeO 2 Hybrid nanosheet array and its preparation method and application, specifically relates to a method of synthesizing porous NiO / CeO by hydrothermal method 2 Hybrid nanosheet arrays and uses thereof. Background technique [0002] Electrochemical biosensors are a type of sensors that use biological components such as enzymes, antigens, antibodies or whole cells as the recognition elements of the detected substances, and electrodes as signal converters to detect signals characterized by changes in potential, current or conductance. It has the advantages of high efficiency, accuracy and easy operation in concentration detection. In the construction of electrochemical biosensors, the matrix material has an important influence on its performance, such as sensitivity, linear range, detection limit and so on. In previous reports, the matrix materials of electrochemical biosensors mainly focused on single-phase nob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04C01F17/00G01N27/26B82Y30/00B82Y40/00
Inventor 崔接武吴玉程张信义王岩张勇
Owner HEFEI UNIV OF TECH
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