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Array chip mass spectrometry analysis method of photoelectrochemical reaction intermediate

An array chip, chemical reaction technology, applied in the field of mass spectrometry analysis, can solve problems such as difficult detection, restricting the development of photoelectric catalysis theory, catalyst development, short life of intermediates, etc., to achieve the effect of in-situ analysis, avoiding delay and avoiding influence

Inactive Publication Date: 2020-04-10
FUDAN UNIV
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Problems solved by technology

The development of photoelectrochemistry relies on the development of new catalytic materials. However, because the intermediates of photoelectrochemical reactions usually have short lifespans and are difficult to detect, there are still many deficiencies in the current research on the catalytic mechanism, which restricts the theoretical development of photocatalysis and the catalyst itself. development of

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  • Array chip mass spectrometry analysis method of photoelectrochemical reaction intermediate
  • Array chip mass spectrometry analysis method of photoelectrochemical reaction intermediate
  • Array chip mass spectrometry analysis method of photoelectrochemical reaction intermediate

Examples

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Effect test

Embodiment １

[0028] Detection of intermediates in mitoxantrone photooxidation reaction using titanium dioxide-modified array chip coupled with electrostatic spray ionization mass spectrometry. Include the following steps:

[0029] Take 0.1g of Degussa P25 titanium dioxide, grind it in a mortar for 1 hour, add 1 ml of 1% acetic acid dropwise during the grinding process, disperse the ground titanium dioxide powder in 1 ml of ethanol, and dilute it 25 times in water to obtain 4 milligrams per milliliter of titanium dioxide suspension. The suspension was modified on the glass surface by inkjet printing technology to form an array chip. The chips were burned at 400°C for one hour and cooled naturally.

[0030] Add 0.4 millimoles per liter, 1 microliter of mitoxantrone aqueous solution dropwise on the surface of a glass sheet modified with titanium dioxide, and use electrostatic spray ionization mass spectrometry to directly detect it. The square wave pulse high voltage used in the detection i...

Embodiment 2

[0033] Detection of intermediates in photooxidation of mitoxantrone using graphene-modified polyimide array chip coupled with electrostatic spray ionization mass spectrometry.

[0034] Graphene oxide ink formulation: 3 mg of graphene oxide flakes (Nanjing Pioneer Nanomaterial Technology Co., Ltd.) and 50 mg of polyvinylpyrrolidone (PVP) powder were added to 1 mL of water:isopropanol (3:1) mixture, and Sonicate by on / off cycle at 35% amplitude for 180 min in a 2 mL centrifuge tube. The final dispersion concentration was 3 mg / ml of graphene oxide. Then, the dispersion was centrifuged at 13000 g Centrifuge for 20 minutes and remove the supernatant. Thereafter, the precipitate was redispersed in 1 ml of a 1,2-propanediol-based mixture containing 10% terpineol.

[0035] Use an inkjet printer to print the above ink onto the surface of a polyimide substrate (0.2 mm thickness) to form an array of dots with a diameter of 0.2 mm, and use light curing to stabilize the printed layer. ...

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Abstract

The invention discloses an array chip mass spectrometry analysis method of a photoelectrochemical reaction intermediate. According to the array chip mass spectrometry analysis method, inorganic materials such as titanium dioxide and graphene with semiconductor properties or photocatalytic performance are used for modifying insulating plastics such as glass and polyimide to form a photocatalyst-modified microarray chip; then a substrate for photoelectrochemical reaction is dropwise added on the chip, and a photoelectrochemical reaction is induced by utilizing illumination. After the reaction iscarried out for a period of time, a sample point is detected by utilizing an electrostatic spray ionization mass spectrometry technology, so as to realize photoelectrochemical reaction intermediate analysis.

Description

technical field [0001] The invention belongs to the field of mass spectrometry analysis, in particular to an array chip mass spectrometry analysis method for photoelectrochemical reaction intermediates. Background technique [0002] Photoelectrochemical reaction is an important field of chemical research and application today, involving energy materials, oxidative damage, aging, medicinal chemistry and other fields. The development of photoelectrochemistry relies on the development of new catalytic materials. However, because the intermediates of photoelectrochemical reactions usually have short lifespans and are difficult to detect, there are still many deficiencies in the current research on the catalytic mechanism, which restricts the theoretical development of photocatalysis and the catalyst itself. development of. [0003] Electrostatic spray ionization technology is a fast in-situ ionization technology, which has many characteristics such as no need for sample prepara...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 乔亮周世伟
Owner FUDAN UNIV
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