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Preparation method of mass type formaldehyde sensor based on functionalized SBA-15

A technology of SBA-15 and formaldehyde sensor, which is applied in the field of preparation of quartz crystal microbalance formaldehyde sensor, can solve the problems of unsatisfactory low concentration detection and pollution, and achieve the effect of easy integration, good repeatability and high sensitivity

Inactive Publication Date: 2011-04-27
萨驰机械工程(上海)有限公司
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  • Application Information

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Problems solved by technology

Traditional SnO 2 Metal-oxide-semiconductor gas sensors such as metal-oxide-semiconductor gas sensors are unsatisfactory for low-concentration detection of these gases. While improving the sensitivity and selectivity of traditional sensors through various doping techniques, people are also trying their best to explore new gas sensors and their sensitive materials. Solve the monitoring problem of indoor air pollution

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  • Preparation method of mass type formaldehyde sensor based on functionalized SBA-15
  • Preparation method of mass type formaldehyde sensor based on functionalized SBA-15
  • Preparation method of mass type formaldehyde sensor based on functionalized SBA-15

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Embodiment 1

[0022] The preparation method of the amine-based functionalized mesoporous material SBA-15 quartz crystal microbalance formaldehyde sensor (QCM), the process and steps are as follows:

[0023] (1) Preparation method of amino-functionalized SBA-15: Weigh 0.3g of ordered mesoporous material SBA-15 and calcinate and activate it at 80℃ for 3h, and then add 2.2mL of silylation reagent β-carboxyethyltrimethoxy Silane was added to 4 mL of toluene solvent, mixed thoroughly, stirred at a constant speed under reflux for 20 hours, and then repeatedly washed with toluene organic solvent, filtered and dried, and the product obtained was cooled to room temperature to obtain the amino-functionalized SBA- 15.

[0024] The obtained amine functionalized SBA-15 was ultrasonically dispersed in ethanol for 30 minutes to obtain a coating solution; it was uniformly coated on the sensor electrode of a quartz crystal microbalance (QCM), and dried at 80-120°C for 3 hours. Finally, a formaldehyde sensor is ...

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Abstract

The invention relates to a preparation method of a quartz crystal microbalance (QCM) formaldehyde sensor based on amino-functionalized SBA-15, belonging to the technical fields of sensitive materials and gas sensors. By first using functionalized SBA-15 as the sensitive material of the QCM mass type sensor to construct the formaldehyde sensor having favorable performance, the preparation method comprises the following steps: carrying out ultrasonic dispersion on self-prepared beta-carboxyl ethyl trimethoxysilane functionalized SBA-15 of which the pore diameter is 2-50 nm in a certain medium for 20-50 minutes to obtain a coating liquid, wherein the used medium is any one of water, acetone or ethanol; and uniformly spreading the coating liquid on the electrode surface of a cleaned quartz crystal microbalance, and drying at 80-120 DEG C for 3-8 hours to obtain the formaldehyde sensor. The mass type sensor has sensitive response to indoor air pollutant gaseous formaldehyde (the lower detection limit can reach the ppm level), and has the advantages of good selectivity, high stability, economy and environmental friendliness. Thus, the invention provides a favorable formaldehyde sensitive material for QCM and opens up a new application area for functionalized SBA-15.

Description

Technical field [0001] The invention relates to a method for preparing a quartz crystal microbalance (QCM) formaldehyde sensor based on an amine-based functionalized mesoporous material SBA-15, and belongs to the technical field of sensitive materials and gas sensors. technical background [0002] At the same time as scientific and technological progress and social development, the application of various new materials and technologies has also brought harm to people’s health. Studies have shown that many sudden diseases are caused by people’s living environment being polluted by harmful gases. . Therefore, indoor air quality issues have become a hot spot of global concern. Indoor air pollutants mainly include the detection of formaldehyde (HCHO), benzene series, and total volatile organic compounds. The primary prerequisite for improving indoor air quality is the detection of indoor air pollutants, and real-time and accurate on-site detection and identification of indoor air po...

Claims

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Application Information

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IPC IPC(8): G01N5/00
Inventor 朱永恒徐甲强袁昊王婧洁范永
Owner 萨驰机械工程(上海)有限公司
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