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Quality chemical sensor using functionalized mesoporous material as sensitive material and method

A technology of chemical sensors and mesoporous materials, applied in the field of micro-nano sensors, to achieve stable performance, low cost, and increase the effect of adsorption

Inactive Publication Date: 2011-09-07
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the construction of mass chemical sensors using functionalized mesoporous materials

Method used

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  • Quality chemical sensor using functionalized mesoporous material as sensitive material and method
  • Quality chemical sensor using functionalized mesoporous material as sensitive material and method
  • Quality chemical sensor using functionalized mesoporous material as sensitive material and method

Examples

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Embodiment 1

[0025] Example 1: Carboxyl-functionalized mesoporous silica powder is used as the sensitive material, and the resonant micro-cantilever beam is used as the transducer, which can be used for tens of ppb (ppb is the volume ratio is parts per billion) 1) A mass-based chemical sensor for magnitude-level ammonia gas detection.

[0026] ①The manufacturing method of carboxyl-functionalized mesoporous silica powder: Measure 1 milliliter of CES (carbomethoxysilanetriol, sodium salt, 25wt% in water, purchased from Germany ABCR Company) reagent, dissolve it in 30 milliliters of deionized water, and take the concentration of The concentrated hydrochloric acid of 36wt% adjusts the pH value of this solution to between 4-5, and this solution is placed in a volume and is 100 milliliters 2 mouth round bottom flasks, standby. Weigh about 0.2 g of SBA-15 type mesoporous silica material (pore diameter is about 7 nanometers, specific surface area is about 700 square meters per gram), add it into t...

Embodiment 2

[0029] Example 2: Using the amine-based functionalized mesoporous film as the sensitive material and the resonant micro-cantilever beam as the transducer, the self-assembly method is used to manufacture tens of ppm (ppm is one millionth of the volume ratio) A mass chemical sensor for level carbon dioxide detection.

[0030]① A method of manufacturing mass-type carbon dioxide chemical sensors using amine-functionalized mesoporous films as sensitive materials and resonant micro-cantilever beams as transducers. The resonant micro-cantilever used in this embodiment is the same as that in Embodiment 1. The manufacturing method of the amine-functionalized mesoporous film is a one-step co-condensation method: Measure 41.2 ml of TEOS (tetraethylorthosilicate, analytically pure, purchased from Sinopharm Chemical Reagent Co., Ltd.), 40 ml of absolute ethanol, 1 microliter Concentrated hydrochloric acid with a concentration of 36 wt% and 4.2 ml of deionized water were added successively...

Embodiment 3

[0032] Example 3: Using mercapto-functionalized mesoporous silica powder as the sensitive material, and using quartz crystal microbalance (QCM) as the transducer, it is manufactured by coating method that can be used for hundreds of micrograms per liter (μg·L) -1 ) mass-type chemical sensor for heavy metal mercury ion detection.

[0033] A method for manufacturing a mass-type heavy metal ion chemical sensor with mercapto-functionalized mesoporous silica powder as a sensitive material and a QCM as a transducer. The QCM used in this embodiment has a resonant frequency of 10M (purchased from Beijing Chenjing Electronics Co., Ltd.). Weigh 10 mg of mercapto-functionalized mesoporous silica powder, and disperse it in 1 ml of deionized water by ultrasonic waves to prepare a suspension of mercapto-functionalized mesoporous silica. Use a precision micropipette (purchased from Gilson, France, with a specification of 0-20 microliters) to draw 20 microliters of the suspension and evenly ...

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Abstract

The invention relates to a quality chemical sensor using a functionalized mesoporous material as a sensitive material, and a manufacturing method and application thereof, and belongs to the field of micro-nano sensors. The sensor is characterized in that: an organic functionalized mesoporous material is used as the sensitive material, and a quality transducer is used as a sensitive detection platform. In the quality chemical sensor, preferential adsorption of specific target chemical molecules is realized by utilizing specific organic functional groups of the functionalized mesoporous material, the adsorption capacity of the sensitive material to the specific target chemical molecules is improved by utilizing the high specific surface area and porosity of the functionalized mesoporous material, and the adsorption of the functionalized mesoporous material to the specific target chemical molecules is converted into electrical signals to be outputted by utilizing the quality transducer so as to detect the specific target chemical molecules.

Description

technical field [0001] The invention relates to a mass-type chemical sensor using functionalized mesopores as a sensitive material, a manufacturing method and an application thereof, belonging to the field of micro-nano sensors. Background technique [0002] As an important biochemical detection method, high-sensitivity chemical sensors have been widely used in environmental monitoring, food industry, medical diagnosis, national security and so on. In the national standard GB / T7665-1987, the definition of a chemical sensor is "a sensor that can sense a specified chemical quantity and convert it into a usable output signal". According to this definition, chemical sensors are generally composed of identification elements, transducing elements and corresponding circuits. Among the many chemical sensor categories, mass-based chemical sensors are one of the research hotspots. The mass chemical sensor refers to the use of quartz crystal microbalance (QCM), surface acoustic wave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/036G01N29/22B81B3/00B81C1/00
Inventor 许鹏程于海涛李昕欣
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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