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Porous CeO2 nanomaterial preparation and application in paper-based sensors

A nano-material and sensor technology, which is applied in the direction of analyzing, analyzing materials, and electrochemical variables of materials by making materials undergo chemical reactions, can solve problems such as inability to obtain accurate values, geographical and artificial restrictions, and inability to promote use. Effects of conductivity and specific surface area, improvement of sensitivity, and reduction of detection limit

Inactive Publication Date: 2018-01-30
UNIV OF JINAN
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AI Technical Summary

Problems solved by technology

Colorimetric methods can only perform qualitative and semi-quantitative detection, and cannot obtain accurate values
Fluorescence detection method has high sensitivity, but the detection equipment is relatively expensive and requires special technicians to operate
Therefore, this detection method is subject to geographical and artificial restrictions, and cannot be widely used.

Method used

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  • Porous CeO2 nanomaterial preparation and application in paper-based sensors

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Embodiment 1

[0032] A porous CeO 2 Preparation of nanomaterials and their application in paper-based sensors:

[0033] (1) Use Adobe illustrator CS4 software on the computer to design the hydrophobic wax printing pattern of the paper chip. The wax printing pattern paper chip consists of three layers. The upper layer is three circular hydrophilic regions with a diameter of 6 mm, and the distance between each pair is 1.5 mm, the hollow channel in the middle layer is composed of two semicircles with a diameter of 10 mm and a rectangle with a length of 13 mm and a width of 10 mm. The shape of the hollow channel is exactly the same as the light gray area of ​​the lower paper chip;

[0034] (2) Print the hydrophobic pattern designed in step (1) onto the paper chip with a Fuji Xerox wax printer, and the paper chip used is ordinary filter paper or chromatographic paper;

[0035] (3) Put the A4 paper printed with wax patterns into an oven and heat it at 130-150 ºC for 1-3 minutes. Except for the m...

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Abstract

The invention discloses a porous CeO2 nanomaterial preparation method and application in paper-based sensors with snowflake shaped Ag nanoparticles. Wax printing and laser cutter techniques are adopted for preparing a hydrophobic area, a semi-hydrophilic area, a hydrophilic area and a hollow passage on paper, and a paper chip is modified by printing corresponding electrodes on the paper and functionalizing operating areas. The obtained paper chip is folded to form a three-electrode system, and primary detection is performed. Pb<2+> activates DNA chain enzymes and catalyzes substrate chain breaking to promote fixation of a porous CeO2 nanomaterial on the paper-based sensors, and inhibition of electrochemical luminescence is substituted with the catalysis effect. The prepared paper chip is folded and subjected to secondary detection, and ultra-sensitive detection of a to-be-detected article is realized through luminous intensity difference of twice detection.

Description

technical field [0001] The invention relates to the technical field of portable paper-based sensor analysis and detection, more specifically a porous CeO 2 Construction of paper-based electrochemiluminescence detection platform based on nanomaterials. Background technique [0002] With the rapid development of science and technology, multi-functional testing equipment is developing towards simplicity and miniaturization. Paper has attracted the attention of researchers due to its low price, abundant reserves, easy storage, and good chemical compatibility. The use of paper in optimized testing equipment greatly reduces the cost of the equipment, making the equipment easier to store, fold and carry. The working principle of this paper chip is: draw hydrophilic and hydrophobic patterns on the paper chip according to the experimental needs, and print the hydrophobic wax onto the paper chip by wax printing, and the part without the printed hydrophobic pattern is driven by the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N27/26G01N27/30G01N27/327
Inventor 于京华黄煜真李丽张彦葛慎光颜梅
Owner UNIV OF JINAN
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