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Monolayer colloidal crystal (MCC) steam sensor with surface wrapped by ultrathin metal organic framework material, preparation method and application

A single-layer colloidal crystal, metal-organic framework technology, applied in the measurement of phase influence characteristics, etc., can solve the problems of cumbersome and time-consuming preparation process, unfavorable analyte diffusion, etc., and achieve excellent reversibility, excellent stability, and large specific surface area. Effect

Inactive Publication Date: 2016-08-10
SHANDONG UNIV
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Problems solved by technology

Other three-dimensional opal-structured MOF films have also been reported for sensing (see: Cui, J.C.; Gao, N.; Wang, C.; Zhu, W.; Li, J.; Wang, H.; Seidel, P. .; Ravoo, B.J.; Li, G.T. Photonic Metal-Organic Framework Composite Spheres: a New Kind of Optical Material with Self-Reporting Molecular Recognition. Nanoscale 2014, 6(20), 11995-12001), but the whole material structure is thicker, not Facilitates analyte diffusion and is cumbersome and time-consuming to prepare

Method used

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  • Monolayer colloidal crystal (MCC) steam sensor with surface wrapped by ultrathin metal organic framework material, preparation method and application
  • Monolayer colloidal crystal (MCC) steam sensor with surface wrapped by ultrathin metal organic framework material, preparation method and application
  • Monolayer colloidal crystal (MCC) steam sensor with surface wrapped by ultrathin metal organic framework material, preparation method and application

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Embodiment

[0050] A method for preparing a single-layer colloidal crystal vapor sensor coated with an ultra-thin metal-organic framework material, comprising the following steps:

[0051] (1) Synthesis of polystyrene microspheres:

[0052] Styrene (21mL) was first dissolved with 100mL NaOH solution (0.1mol L -1 ) was washed four times, and then washed four times with 100 mL ultrapure water. Add the washed styrene and 142mL water into a 250mL four-neck flask, blow nitrogen to exhaust the air, heat the oil bath to 70°C, and then add 9mL aqueous solution containing 0.0563g potassium persulfate. Under nitrogen protection, keep stirring at a constant speed for about 10 hours at 70°C. By changing the amount of styrene or potassium persulfate, polystyrene microspheres with particle diameters of 380nm, 470nm, and 590nm can be obtained respectively (the particle size dispersion is less than 7% ).

[0053] (2) Preparation of MCC:

[0054] First, wash a glass piece and a single crystal silicon ...

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Abstract

The invention relates to a single-layer colloidal crystal (MCC) steam sensor with a surface wrapped by an ultrathin metal organic framework material, a preparation method and application. The sensor is an MCC with the surface wrapped by a metal organic framework compound (MOF) particle layer. The preparation steps include (1), polystyrene microsphere synthesis, (2), MCC preparation and (3), ZIF-8 particle layer building on the surface of the MCC. According to the MCC steam sensor, the advantages of an ultrathin MOF film are highlighted, and the sensing performance is improved through the effective mass transfer process and optical signal conversion. An improved in-situ growth method is adopted for building the ultrathin MOF film, a crystal boundary and pores are introduced, due to ultrathin thickness, analyte can quickly diffuse and be adsorbed into the pores, and the sensing precision and reliability are improved.

Description

technical field [0001] The invention relates to a single-layer colloidal crystal vapor sensor whose surface is coated with an ultra-thin metal organic framework material, a preparation method and an application, and belongs to the technical field of optical sensing materials. Background technique [0002] Metal-organic frameworks (MOFs), also known as porous coordination polymers (PCPs), are porous solid materials constructed of organic ligands and metal ions (or ion clusters). MOF has the advantages of high specific surface area, regular pore structure, and designable chemical functions of the framework structure. Using the host-guest interaction between MOF channels and small molecules can regulate its adsorption performance, so MOF has broad application prospects in the fields of gas storage or separation, catalysis, and sensing. [0003] The detection of gas or gas-phase analytes is widely required in the fields of industry, medicine, food, and environmental monitoring....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 李澄焦秀玲陈代荣
Owner SHANDONG UNIV
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