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Toluene sensor based on anodic alumina nanowire and preparation method thereof

An anodized aluminum and nanowire technology, applied in the field of sensors, can solve the problems of long detection period, high cost, and the inability to realize accurate and fast detection of trace amounts of toluene, and achieve high accuracy, low cost, repeatability and controllability high effect

Inactive Publication Date: 2014-10-08
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of the existing method for detecting toluene that the detection period is long, the cost is expensive, and professionally trained skilled technicians are required to operate instruments and equipment, and the on-site accurate and rapid detection of trace amounts of toluene in the environment cannot be realized. Provide a response Fast, accurate and reproducible toluene sensor based on anodized aluminum nanowires

Method used

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  • Toluene sensor based on anodic alumina nanowire and preparation method thereof
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  • Toluene sensor based on anodic alumina nanowire and preparation method thereof

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Embodiment 1

[0038] A kind of preparation method of the toluene sensor based on anodized aluminum nanowire, described preparation method comprises the following steps:

[0039]a) Pre-treatment: Anneal the high-purity aluminum plate with a purity ≥99.999% at 220°C for 8 hours, wash and degrease after cooling, and then immerse in the soaking solution. The temperature of the soaking solution is 35°C and the soaking time is 30 minutes; take it out and wash it, Perform electrochemical polishing for 5 minutes in a mixed solution of ethanol and perchloric acid with a volume ratio of 2:1 (Ra ≤ 0.01 μm); the solution used for cleaning and degreasing is a mixture of acetone and cyclohexanol, and the mixture of acetone and cyclohexanol The volume ratio is 1:2, and the washing liquid is vibrated with ultrasonic waves while cleaning; the soaking liquid is a mixed solution of sodium carbonate with a mass fraction of 5% and potassium hydroxide with a mass fraction of 2%, and the volume ratio of sodium car...

Embodiment 2

[0045] A kind of preparation method of the toluene sensor based on anodized aluminum nanowire, described preparation method comprises the following steps:

[0046] a) Pre-treatment: anneal the high-purity aluminum plate with a purity of ≥99.999% at 280°C for 7 hours, wash and degrease after cooling, and then immerse in the soaking solution. The temperature of the soaking solution is 45°C and the soaking time is 20 minutes; take it out and wash it, Perform electrochemical polishing for 5 minutes in a mixed solution of ethanol and perchloric acid with a volume ratio of 2:1 (Ra ≤ 0.01 μm); the solution used for cleaning and degreasing is a mixture of acetone and cyclohexanol, and the mixture of acetone and cyclohexanol The volume ratio is 1:3, and the washing liquid is vibrated with ultrasonic waves while cleaning; the soaking liquid is a mixed solution of sodium carbonate with a mass fraction of 7% and potassium hydroxide with a mass fraction of 3%, and the volume ratio of sodium...

Embodiment 3

[0052] A kind of preparation method of the toluene sensor based on anodized aluminum nanowire, described preparation method comprises the following steps:

[0053] a) Pretreatment: Anneal the high-purity aluminum plate with a purity of ≥99.999% at 320°C for 6 hours, wash and degrease after cooling, and then immerse in the soaking solution. The temperature of the soaking solution is 50°C and the soaking time is 10 minutes; take it out and wash it, Perform electrochemical polishing for 5 minutes in a mixed solution of ethanol and perchloric acid with a volume ratio of 2:1 (Ra ≤ 0.01 μm); the solution used for cleaning and degreasing is a mixture of acetone and cyclohexanol, and the mixture of acetone and cyclohexanol The volume ratio is 1:4, and the cleaning solution is ultrasonically vibrated while cleaning; the soaking solution is a mixed solution of sodium carbonate with a mass fraction of 8% and potassium hydroxide with a mass fraction of 4%, and the volume ratio of sodium ca...

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Abstract

The invention relates to a toluene sensor based on an anodic alumina nanowire and a preparation method thereof. The toluene sensor electrode is coated with the anodic alumina nanowire. The preparation method includes pretreatment, oxidation, surface modification, and sensor preparation. The sensor provided by the invention has the characteristics of low cost, rapid response, short desorption time, good repeatability and high accuracy. Preparation of the sensor has the advantages of simple process, low material consumption, high process repeatability and controllability, and is convenient for batch production.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a toluene sensor based on anodized aluminum nanowires with fast response, high accuracy and good repeatability and a preparation method. [0002] Background technique [0003] Toluene Molecular Formula C 7 h 8 , is a colorless, volatile liquid with a special aroma. Toluene is an aromatic hydrocarbon compound. Many of its properties are very similar to benzene. In today's practical applications, it is often used as an organic solvent instead of benzene, which is quite toxic. It is also a commonly used chemical raw material and can be used to make explosives and pesticides. , benzoic acid, dyes, synthetic resins and polyester, etc., and it is also a component of gasoline. However, toluene vapor is poisonous and can cause harm to the human body through the respiratory tract. The hazard level is Class B. It must be prevented from entering the respiratory organs during use and pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 惠国华赵梦田杜佳苏郑海霞
Owner ZHEJIANG GONGSHANG UNIVERSITY
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