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Nano gamma-aluminum oxide, preparation method thereof and application of nano gamma-aluminum oxide in detection of 2-methylacrolein

A nano and aluminum salt technology, applied in the detection field, can solve the problems of difficult long-term online detection, long analysis time, complicated operation, etc., and achieve the effects of low detection limit, good reproducibility and high response sensitivity

Pending Publication Date: 2022-03-29
GUANGDONG PHARMA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods are complicated to operate, take a long time to analyze, and the equipment is expensive, and it is difficult to realize long-term online detection.

Method used

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  • Nano gamma-aluminum oxide, preparation method thereof and application of nano gamma-aluminum oxide in detection of 2-methylacrolein
  • Nano gamma-aluminum oxide, preparation method thereof and application of nano gamma-aluminum oxide in detection of 2-methylacrolein
  • Nano gamma-aluminum oxide, preparation method thereof and application of nano gamma-aluminum oxide in detection of 2-methylacrolein

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preparation example Construction

[0047] Nano γ-Al 2 o 3 A preparation method comprising the steps of:

[0048] After the precursor is hydrothermally reacted at 160-200°C, the solid product is collected, washed, dried and calcined;

[0049]Wherein, the preparation of the precursor includes: mixing a premix with ethyl acetate; the premix is ​​mainly prepared by mixing a soluble aluminum salt, a surfactant, an alkali and a solvent.

[0050] In a specific embodiment of the present invention, the soluble aluminum salt includes any one or more of aluminum nitrate, aluminum acetate and aluminum chloride.

[0051] In a specific embodiment of the invention, the alkali is sodium hydroxide.

[0052] In a particular embodiment of the invention, the solvent includes water and n-butanol. Further, the volume ratio of the water to the n-butanol is (10-18):1, preferably (13-15):1, more preferably 14:1.

[0053] As in different embodiments, the volume ratio of the water and the n-butanol can be 10:1, 11:1, 12:1, 13:1, 14:...

Embodiment 1

[0087] This embodiment provides nano-γ-Al 2 o 3 A preparation method comprising the steps of:

[0088] (1) Take 0.0113g of Al(NO 3 ) 3 9H 2 O, 0.2 g of polyethylene glycol 2000 and 1.2 g of NaOH were dissolved in a mixed solvent (mixed with 28 mL of deionized water and 2 mL of n-butanol), and after magnetic stirring for 10 min, 3 mL of ethyl acetate was added, and the stirring was continued for 20 min.

[0089] (2) Then add the mixed solution obtained in step (1) into a 100mL hydrothermal kettle lined with polytetrafluoroethylene, and put it in a 180°C drying oven to react for 24h; after the reaction, cool the hydrothermal kettle to room temperature , collect the white product in the hydrothermal kettle and wash it several times with deionized water and absolute ethanol respectively, then place the solid product in a vacuum oven and dry at 80°C to obtain a white powder, then place it in a muffle furnace at 500°C Calcined for 3 hours to obtain nanometer γ-Al 2 o 3 .

Embodiment 2

[0091] This embodiment provides a nanometer-based γ-Al2 o 3 A method for detecting 2-methacrolein, comprising the steps of:

[0092] The gas to be measured containing 2-methacrolein was placed in the nanometer γ-Al 2 o 3 Under the action of , after reacting at 187°C in an oxygen-containing atmosphere such as air, the corresponding luminescent signal is detected. Among them, the nano-γ-Al 2 o 3 For the nanometer gamma-Al that embodiment 1 prepares 2 o 3 .

[0093] Specifically, you can use figure 1 The shown device detects 2-methacrolein, and the steps are as follows:

[0094] (1) The preparation concentration is 180mg / m 3 The 2-methacrolein gas, as the gas to be measured;

[0095] (2) Control the sampling valve to be in the energized state through the relay, start the sampling pump, and the gas to be tested is sent into the quantitative loop through the first valve port I and the second valve port II of the sampling valve from channel a, so that the gas to be tested ...

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Abstract

The invention relates to the technical field of detection, in particular to nano gamma-aluminum oxide, a preparation method thereof and application of the nano gamma-aluminum oxide in detection of 2-methylacrolein. The preparation method of the nano gamma-Al2O3 comprises the following steps: carrying out hydrothermal reaction on a precursor at 160-200 DEG C, collecting a solid product, washing, drying and calcining; wherein the preparation of the precursor comprises the following steps: mixing a premix with ethyl acetate; the premix is mainly prepared by mixing soluble aluminum salt, a surfactant, alkali and a solvent. The nano gamma-Al2O3 with corresponding properties is prepared by a certain method, can be used as a sensitive material, is used for detecting 2-methylacrolein based on a catalytic luminescence principle, has specific response to 2-methylacrolein, is high in response sensitivity, high in response speed, low in detection limit, good in reproducibility, good in stability and the like, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a nanometer gamma-alumina, a preparation method thereof and an application in detecting 2-methacrolein. Background technique [0002] 2-Methacrolein is mainly used in the manufacture of copolymers and resins, and is an important chemical raw material. However, under certain conditions, 2-methacrolein vapors can explode when mixed with air. Therefore, it is of great significance to detect the concentration of 2-methacrolein. [0003] The existing commonly used methods for detecting 2-methacrolein include gas chromatography and gas chromatography mass spectrometry. However, these two methods are complicated to operate, long in analysis time, expensive in equipment, and difficult to realize long-term on-line detection. [0004] In view of this, the present invention is proposed. Contents of the invention [0005] The first object of the present invention is to provide nano g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/34C01F7/36C01F7/441B82Y40/00G01N21/76
CPCC01F7/34C01F7/36C01F7/441B82Y40/00G01N21/766C01P2006/12C01P2004/16C01P2004/24C01P2004/64
Inventor 张润坤刘嘉健黎锴慧陈青松王景鑫
Owner GUANGDONG PHARMA UNIV
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