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

A technology of SBA-15, formaldehyde sensor, applied in the field of preparation of quartz crystal microbalance formaldehyde sensor, can solve the problems of pollution, unsatisfactory low concentration detection, etc., and achieve the effects of good repeatability, easy integration and stable performance

Inactive Publication Date: 2012-08-29
萨驰机械工程(上海)有限公司
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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 amine functionalized mesoporous material SBA-15 quartz crystal microbalance formaldehyde sensor (QCM), its process and steps are as follows:

[0023] (1) The preparation method of amine-functionalized SBA-15: Weigh 0.3 g of ordered mesoporous material SBA-15 and activate it by calcining at 80°C for 3 h, and dissolve 2.2 mL of silylating reagent β-carboxyethyltrimethoxy Add silane into 4mL of toluene solvent, mix well, and stir at a constant speed under reflux for 20h, then repeatedly wash with toluene organic solvent, filter and dry, and cool the obtained product to room temperature to obtain 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 produced.

[0025] The thickness...

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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 preparation method of a quartz crystal microbalance (QCM) formaldehyde sensor based on an amine functionalized mesoporous material SBA-15, belonging to the technical field of sensitive materials and gas sensors. technical background [0002] With the advancement of science and technology 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 the pollution of harmful gases in people's living environment . Therefore, the problem of indoor air quality has become a global focus. Indoor air pollutants mainly include the detection of formaldehyde (HCHO), benzene series, and total volatile organic compounds. The first prerequisite for improving indoor air quality is the detection of indoor air pollutants, and realizing real-time and accurate on-site detection and identification of indoor air pollutants su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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