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Quartz crystal microbalance sensor and preparation method thereof

A quartz crystal and microbalance technology, applied in the field of sensor detection, can solve the problems of QCM crystal oscillator's impact on electrode detection performance and shortened life, and achieve the effects of excellent hydrophobicity, extended accurate measurement, and high responsiveness

Pending Publication Date: 2022-05-10
杭州诺蒙微晶生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electrode is cleaned by soaking it in the cleaning solution, and many cleaning solutions are often corrosive, which will have a great impact on the electrode detection performance of the QCM crystal oscillator, and greatly shorten the service life.

Method used

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Examples

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Effect test

preparation example Construction

[0023] The invention provides a kind of preparation method of quartz crystal microbalance sensor, comprises the following steps:

[0024] S1. Immerse the electrode of the crystal oscillator into the MnO solution and take it out, repeat 3-4 times, dry and anneal to obtain an electrode coated with MnO seeds;

[0025] S2. Configure Mn(NO 3 ) 2 , a mixed solution of hexamethylenetetraammonium and cycloheptasaccharide, the electrode coated with MnO seeds is immersed in the mixed solution, and the electrode coated with MnO nanocomposite film is prepared;

[0026] S3, dissolving titanium dioxide P25 powder in deionized water, ultrasonically dispersing, and centrifuging to remove insoluble particles to prepare a suspension containing titanium dioxide P25;

[0027] S4, immerse the prepared electrode coated with MnO nanocomposite film in the suspension containing titanium dioxide P25, and dry at room temperature to obtain a modified MnO / TiO 2 Electrodes for nanocomposite membranes. ...

Embodiment 1

[0038] A kind of quartz crystal microbalance sensor provided in this embodiment includes a crystal oscillator, the electrode surface of the crystal oscillator is modified with a self-cleaning coating, and the self-cleaning coating is MnO / TiO 2 nanocomposite film.

[0039] The preparation method of described quartz crystal microbalance sensor comprises the steps:

[0040] Weigh 0.06mol of Mn(CH 3 COO) 2 2H 2 O and 0.06mol of HO(CH 2 ) 2 NH 2 and dissolved in 60ulC 4 h 10 o 2 in, stir evenly to obtain HO(CH 2 ) 2 NH 2 solution with Mn(CH 3 COO) 2 2H 2 O solution, wherein the stirring temperature is 70°C and the stirring time is 25min;

[0041] The prepared Mn(CH 3 COO) 2 2H 2 O solution was slowly added to HO(CH 2 ) 2 NH 2 In the solution, stir evenly to prepare MnO gel, wherein, the stirring temperature is 70°C, and the stirring time is 1.5h; then add 0.3g polyethylene glycol to prepare the MnO solution, which is statically aged for later use, wherein, the ...

Embodiment 2

[0047] A kind of quartz crystal microbalance sensor provided in this embodiment includes a crystal oscillator, the electrode surface of the crystal oscillator is modified with a self-cleaning coating, and the self-cleaning coating is MnO / TiO 2 nanocomposite film.

[0048] The preparation method of described quartz crystal microbalance sensor comprises the steps:

[0049] Weigh 0.09mol of Mn(CH 3 COO) 2 2H 2 O and 0.09mol of HO(CH 2 ) 2 NH 2 and dissolved in 60ulC 4 h 10 o 2 in, stir evenly to obtain HO(CH 2 ) 2 NH 2 solution with Mn(CH 3 COO) 2 2H 2 O solution, wherein the stirring temperature is 70°C and the stirring time is 25min;

[0050] The prepared Mn(CH 3 COO) 2 2H 2 O solution was slowly added to HO(CH 2 ) 2 NH 2 In the solution, stir evenly to prepare MnO gel, wherein, the stirring temperature is 70°C, and the stirring time is 1.5h; then add 0.6g of polyethylene glycol to prepare the MnO solution, which is statically aged for later use, wherein, t...

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PUM

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Abstract

The invention relates to a quartz crystal microbalance sensor and a preparation method thereof, and the preparation method comprises the following steps: S1, immersing an electrode of a crystal oscillator into a MnO solution, taking out the electrode, repeating for 3-4 times, drying and annealing to prepare an electrode coated with MnO seeds; s2, preparing a mixed solution of Mn (NO3) 2, hexamethylenetetramine and cycloheptaose, and immersing the electrode coated with the MnO seeds into the mixed solution to prepare an electrode coated with a MnO nano composite membrane; s3, titanium dioxide powder is dissolved in deionized water, ultrasonic dispersion treatment is carried out, insoluble particles are removed through centrifugation, and suspension liquid containing titanium dioxide is prepared; and S4, immersing the prepared electrode coated with the MnO nano-composite film into a suspension containing titanium dioxide, and drying at room temperature to prepare the electrode modified with the MnO / TiO2 nano-composite film. According to the technical scheme, the sensor with high responsiveness, high sensitivity and high stability is obtained; a self-cleaning coating can be modified on the surface of the crystal oscillator electrode, and self-cleaning can be achieved.

Description

technical field [0001] The invention relates to the technical field of sensor detection, in particular to a quartz crystal microbalance sensor and a preparation method thereof. Background technique [0002] As a sensor based on mass change, quartz crystal microbalance (QCM) has the advantages of low cost, simple operation, good specificity and high sensitivity, and is widely used in chemistry, physics, surface science, biomedicine and other fields. In liquid phase detection, whether the electrode surface of the QCM crystal oscillator is clean or not has a great influence on the detection results. At present, the electrode is cleaned by immersing it in a cleaning solution, and many cleaning solutions are often corrosive, which will have a great impact on the electrode detection performance of the QCM crystal oscillator, and at the same time greatly shorten the service life. Contents of the invention [0003] The object of the present invention is to provide a kind of prepa...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01G3/16B82Y30/00B82Y15/00
CPCG01N5/00G01G3/16B82Y30/00B82Y15/00
Inventor 司士辉余坦雷
Owner 杭州诺蒙微晶生物科技有限公司
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