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Preparation method of HCl gas sensor based on two-dimensional Au@MOFs nanoparticle ordered array

A nanoparticle array and gas sensor technology, which is applied in the direction of instruments, scientific instruments, phase influence characteristic measurement, etc., can solve the problems of low response sensitivity, poor selectivity, PS nanospheres and substrate falling off, etc., and achieve high selectivity detection, Good sensitivity, not easy to fall off

Inactive Publication Date: 2019-07-26
JIANGXI SCI & TECH NORMAL UNIV
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  • Application Information

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Problems solved by technology

However, this type of sensor still has certain limitations in practical application: for example, the response sensitivity is low, the selectivity is poor, and in the preparation process of the sensor, it is necessary to pay attention to the problem of PS nanospheres falling off from the substrate; in addition, the sensor It only detects water and some organic gas molecules, but does not realize the detection of acid gas molecules

Method used

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  • Preparation method of HCl gas sensor based on two-dimensional Au@MOFs nanoparticle ordered array
  • Preparation method of HCl gas sensor based on two-dimensional Au@MOFs nanoparticle ordered array
  • Preparation method of HCl gas sensor based on two-dimensional Au@MOFs nanoparticle ordered array

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preparation example Construction

[0028] The prepared quartz-based two-dimensional Au nanoparticle array comprises:

[0029] Using the two-dimensional polymer microsphere array on the quartz substrate as a template, it is prepared by depositing an Au layer and annealing at a high temperature of 900-1000°C for 2 hours.

[0030] The physical deposition methods include magnetron sputtering deposition, thermal evaporation deposition or electron beam evaporation deposition.

[0031] The thermal decomposition and annealing treatment of the above-mentioned template deposited with gold film includes:

[0032] Put the above-mentioned template deposited with gold film into a tube furnace, and heat and anneal at 900-1000°C in an air atmosphere for 2 hours. The single-layer polymer colloidal crystal array on the quartz base is thermally decomposed, while the Au film on the quartz base It will melt, fuse, and solidify in situ to form a periodic quartz-based two-dimensional Au nanoparticle array.

[0033] The preparation ...

Embodiment 1

[0046] Such as Figure 6 As shown, a sensor for detecting the concentration of HCl gas is prepared by the following steps:

[0047] In step a, a single-layer polystyrene colloidal sphere crystal array is prepared on a quartz sheet through a gas-liquid interface self-assembly method.

[0048] Step b, using the quartz-based single-layer polystyrene colloidal sphere crystal array obtained in step a as a template, adopting the magnetron sputtering deposition method (the processing current of magnetron sputtering deposition is 20mA, the processing time of magnetron sputtering deposition The gold target material used in the 3min magnetron sputtering deposition meets the following conditions: a gold film with a thickness of 20-40 nm is deposited on the surface of the template.

[0049] Step c, put the above-mentioned template deposited with the gold film into a tube furnace, and heat and anneal at 900-1000° C. It will melt, fuse, and solidify in situ, thereby producing a periodic q...

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Abstract

The invention discloses a preparation method of an HCl gas sensor based on a two-dimensional Au@MOFs nanoparticle ordered array. The preparation method comprises the steps: firstly, a quartz-based single-layer polymer colloid crystal array is prepared as a template; then a layer of gold film with the thickness being 20-40 nm is deposited on the surface of the template; then the template is subjected to thermolysis and annealing treatment, and a quartz-based two-dimensional gold nanoarray is prepared; then the quartz-based two-dimensional gold nanoarray is obliquely placed in Fe<III>-MOF-5 reaction liquid to react for 6 hours at 110 DEG C; and after natural cooling to the room temperature, a sample is taken out, rinsed with ethanol, and naturally air-dried, and the two-dimensional Au@Fe<III>-MOF-5 nanoparticle array can be obtained and can directly serve as the gas sensor for detecting the HCl concentration. Through the specific response of Fe<III>-MOF-5 to HCl and the optical characteristics of LSPR and optical diffraction of two-dimensional Au, the concentration of the HCl can be quickly detected in real time, and the visual sensor is simple in preparation process, low in cost, easy to operate and suitable for actual industrial application.

Description

technical field [0001] The invention relates to a nanomaterial sensor, in particular to a method for preparing an HCl gas sensor based on a two-dimensional Au@MOFs nanoparticle ordered array. Background technique [0002] With the continuous improvement of the technical level, a large amount of hydrogen chloride (HCl) gas is produced in the industrial production process. It is a colorless, acidic gas with a pungent smell. It is easily volatile and diffused, and can be mixed with air in any proportion, but it is not easily absorbed by particles. If it enters the air, it will cause the following hazards: first, it can dissolve in water to form hydrochloric acid, causing acid rain; second, it can enter the human body through the respiratory tract, causing irritation of the throat mucosa, nasal membrane ulcers, tooth erosion and other diseases , It can lead to human death in severe cases; in addition, it can cause serious corrosion to metal equipment and buildings, and cause hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/47G01N21/25G01N21/41
CPCG01N21/25G01N21/41G01N21/4788G01N2021/258
Inventor 门丹丹向军淮黄隆张洪华
Owner JIANGXI SCI & TECH NORMAL UNIV
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