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Hydrogen enhanced Raman spectrum detection method for sulfydryl gas in plasmon MOF (Metal Organic Framework)

A technology of Raman spectrum detection and plasmon, which is applied in the field of SERS signal, can solve the problems of weak Raman signal, only reaching the ppm level, and obstacles to the analysis of material components, achieving obvious enhancement effect, good reproducibility, and realization of Conditions and effects for simple manipulation

Active Publication Date: 2021-11-09
CHONGQING UNIV
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Problems solved by technology

[0003] For the detection of thiol-containing compounds, the existing detection methods include RP-HPLC method for the determination of sulfhydryl content, pre-column derivatization high-performance liquid chromatography-ultraviolet detection method, and electrochemical desorption combined with fluorescence technology, etc., but the detection limit Generally, the value can only reach the ppm level, and most of them are quantitatively detected in a liquid environment; for the detection of gaseous compounds, it is limited to gaseous compounds with high concentrations, and for low-concentration gaseous compounds, due to the general Raman signal obtained in the detection Weaker, there is a certain obstacle to the analysis of the substance composition from the signal, so the detection result is difficult to meet the requirements

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  • Hydrogen enhanced Raman spectrum detection method for sulfydryl gas in plasmon MOF (Metal Organic Framework)
  • Hydrogen enhanced Raman spectrum detection method for sulfydryl gas in plasmon MOF (Metal Organic Framework)
  • Hydrogen enhanced Raman spectrum detection method for sulfydryl gas in plasmon MOF (Metal Organic Framework)

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[0030] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0031] A method for detecting hydrogen-enhanced Raman spectroscopy of mercapto-based gases in plasmonic MOFs, comprising the following steps:

[0032] The first step is to prepare materials and equipment.

[0033] Materials include: Silver Nitrate (AgNO 3 , concentration ≥99.9%), polyvinylpyrrolidone (PVP, average molecular weight Mw=58000, K29-32), sodium borohydride (NaHB 4 ), ethylene glycol (EG), cetyltrimethylammonium bromide (CTAB), 2-methylimidazole (concentration = 98%), methanol (concentration ≥ 99.9%), zinc nitrate hexahydrate (Zn (NO 3 ) 2 ·6H 2 O), absolute ethanol (concentration ≥ 99.5%), ultrapure water (18.2MΩcm -1 ), polydimethylsiloxane (PDMS), hydrogen, mercapto solutions (such as 2-acetylthiophene C 6 h 6 OS, p-dimethylaminobenzaldehyde DMAB, C 6 h 12 S 2 );

[0034] Equipment includes: oxygen plasma cleaning machine (model ...

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Abstract

The invention discloses a hydrogen enhanced Raman spectrum detection method for sulfydryl gas in plasmon MOF. The method comprises the following steps: 1, preparation of materials and equipment; 2, synthesis of AgNP@ZIF-8 nano particles: firstly, synthesizing silver nanoparticles, and then coating the surfaces of the silver nanoparticles with ZIF-8; 3, gas adsorption; 4, hydrogen reinforcement: directly carrying out SERS detection on a part of the AgNP@ZIF-8 substrate which fully adsorbs the sulfydryl gas to obtain an SERS signal diagram which is not saturated by hydrogen, and placing the other part of the AgNP@ZIF-8 substrate which fully adsorbs the sulfydryl gas in a closed environment filled with hydrogen with the concentration of 1%, waiting for 24 hours, and carrying out SERS detection on a sample subjected to hydrogen treatment to obtain a hydrogen saturation enhanced SERS signal diagram. The SERS detection enhancement effect of the gas-state compound containing the sulfydryl functional group is universal, the SERS signal enhancement by introducing hydrogen is crucial, and the SERS detection of the low-concentration sulfydryl gas-state compound is realized.

Description

technical field [0001] The invention is applicable to the technical field of absorbing and detecting gas components, and in particular relates to a method for enhancing the SERS signal of detecting gas components through hydrogen. Background technique [0002] Mercapto, also known as mercapto or mercaptan, is a negative monovalent functional group composed of a sulfur atom and a hydrogen atom, and its chemical formula is -SH. Different groups are connected to the thiol end, and the organic compounds belong to different categories, such as thiol (R-SH) and thiophenol (Ar-SH). Substances with mercapto groups often have odor, weak acidity, and are easily oxidized. Some substances with mercapto groups are toxic and common in daily life, such as hydrogen sulfide and methyl mercaptan. [0003] For the detection of thiol-containing compounds, the existing detection methods include RP-HPLC method for the determination of sulfhydryl content, pre-column derivatization high-performanc...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 杨水文黄映洲王里奥谢鑫黄川余文柔
Owner CHONGQING UNIV
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