Ammonia gas sensor for room temperature and preparation method thereof

An ammonia sensor and room temperature technology, applied in the field of sensors, can solve problems such as poor selectivity, poor stability, and low sensitivity

Active Publication Date: 2017-09-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of nanotechnology in gas-sensing materials can largely solve the problems of

Method used

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  • Ammonia gas sensor for room temperature and preparation method thereof
  • Ammonia gas sensor for room temperature and preparation method thereof
  • Ammonia gas sensor for room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0042] Step 2. Preparation of nanotubes: connect the needle of the disposable syringe to the positive pole of the high-voltage DC power supply, and fix it at a height of 15-20cm from the collection plate, set the spinning voltage to 15-20KV, and fix the clean aluminum foil to the desktop. On the negative pole of the high-voltage power supply. Turn on the high-voltage power supply, the needle of the disposable needle tube appears Taylor cone and starts spinning, deposit a sinking nanofiber on the aluminum foil of the receiver, after spinning, put it in the muffle furnace for annealing treatment, the heating rate is 4-6 ℃ / min, heat up to 680-720℃, hold time for 3.5-5 hours, then cool freely to room temperature, and finally get one-dimensional SrGe 4 O 9 nanotube;

[0043] Step 3. Production of the sensor:

[0044] Step 3.1: Use acetone, ethanol and distilled water to clean the substrate in sequence, and set aside;

[0045] Step 3.2: Weigh an appropriate amount of one-dimensional SrGe...

Example Embodiment

[0048] Example 1:

[0049] One-dimensional SrGe 4 O 9 Take nanotubes as an example to introduce the preparation process in detail:

[0050] (1) Precursor solution configuration: at room temperature, 0.1046g strontium nitrate Sr(NO 3 ) 2 Powder and 0.5g ethoxy germanium ([Ge(OEt) 4 ]) mixed, put into 3.5g absolute ethanol, 17.5g N,N-dimethylformamide (DMF) and 0.5g deionized water mixed solution to dissolve, then add 2.99g polyvinylpyrrolidone (PVP, 130 10,000 molecular weight) powder. Finally, the mixed solution is magnetically stirred for 4 hours until the mixed solution is clear, transparent and uniform. Then, use a dropper to suck about 1ml of the solution into the disposable syringe, ready to start electrospinning.

[0051] (2) Preparation of nanotubes: Connect the needle of the disposable syringe to the positive pole of the high-voltage DC power supply and fix it at a height of 15 cm from the collection plate. The spinning voltage is set to about 15KV. Connect the clean alum...

Example Embodiment

[0054] Example 2:

[0055] One-dimensional SrGe 4 O 9 Take nanotubes as an example to introduce the preparation process in detail:

[0056] (1) Precursor solution configuration: at room temperature, 0.1046g strontium acetate Sr(NO 3 ) 2 Powder and 0.5g ethoxy germanium ([Ge(OEt) 4 ]) mixed, put into 3.5g absolute ethanol, 17.5g N,N-dimethylformamide (DMF) and 0.5g deionized water mixed solution to dissolve, then add 2.99g polyvinylpyrrolidone (PVP, 130 10,000 molecular weight) powder. Finally, the mixed solution is magnetically stirred for 4 hours until the mixed solution is clear, transparent and uniform. Then, use a dropper to suck about 1ml of the solution into the disposable syringe, ready to start electrospinning.

[0057] (2) Preparation of nanotubes: Connect the needle of the disposable syringe to the positive pole of the high-voltage DC power supply and fix it at a height of 20 cm from the collection plate. The spinning voltage is set to about 15KV. Connect the clean alum...

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Abstract

The invention belongs to the technical field of sensors and in particular relates to an ammonia gas sensor for room temperature and a preparation method thereof. The ammonia gas sensor comprises a gas-sensitive material and a substrate, wherein the gas-sensitive material is a one-dimensional SrGe4O9 nanotube. The gas-sensitive material is composed of the one-dimensional SrGe4O9 nanotube and noble metal and the loading amount of the noble metal is 0.01 weight percent to 2 weight percent. The ammonia gas sensor for the room temperature has the beneficial effects that the technical scheme is adopted so that the room-temperature gas-sensitive performance of the ammonia gas sensor is excavated. The SrGe4O9 nanotube is prepared by utilizing an electrostatic spinning technology; the advantage of the nanotube is utilized and the performance is effectively improved; the noble metal Pt is deposited on the basis of the SrGe4O9 nanotube and the gas-sensitive performance is improved; Pt-SrGe4O9 has the room-temperature gas-sensitive performance so that convenience is provided for applying the Pt-SrGe4O9 to flexible electronic devices and a room-temperature gas-sensitive sensor is manufactured on the substrate.

Description

Technical field: [0001] The invention belongs to the technical field of sensors, and in particular relates to an ammonia sensor used at room temperature and a preparation method thereof. Background technique: [0002] With the rapid development of modern industrial technology, the natural environment inevitably bears a serious burden, among which air pollution is a severe test. The leakage of industrial waste gas in production and toxic and harmful gas in life pollutes the environment and destroys ecology, not only causing huge property losses, but also endangering health and life safety. The research on the detection, monitoring and alarming of harmful and poisonous gases has attracted more and more people's attention. The emergence of gas sensors provides convenience for the detection of toxic and harmful gases, and high-performance gas sensors have become the focus and hotspot of research at home and abroad in recent years. Gas sensor is an electronic device that can co...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 陈娣黄婷婷陈帅
Owner UNIV OF SCI & TECH BEIJING
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