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Benzoic acid functionally-modified non-stoichiometric molybdenum oxide nanocrystal as well as preparation method and application thereof

A non-stoichiometric, nano-crystal technology, applied in molybdenum oxide/molybdenum hydroxide, nanotechnology, medical preparations containing active ingredients, etc., can solve the problems of quantitative detection and elimination of food-borne pathogens, etc. Achieve excellent light-to-heat conversion performance, good dispersion and stability

Active Publication Date: 2021-02-26
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has not been well utilized for the quantitative detection and elimination of food-borne pathogenic bacteria Escherichia coli O157:H7, nor has it been used for the quantitative detection and elimination of food-borne pathogenic bacteria. disinfect

Method used

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  • Benzoic acid functionally-modified non-stoichiometric molybdenum oxide nanocrystal as well as preparation method and application thereof
  • Benzoic acid functionally-modified non-stoichiometric molybdenum oxide nanocrystal as well as preparation method and application thereof
  • Benzoic acid functionally-modified non-stoichiometric molybdenum oxide nanocrystal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of functionalized modified non-stoichiometric molybdenum oxide nanocrystals with near-infrared photothermal conversion performance, adding 30mg black molybdenum disulfide powder to 30ml ethanol, adding 0.74mmol H 2 o 2 , stirred rapidly for 15 min, transferred the mixture to a reaction kettle, heated to 150° C., heated for 12 h, and cooled to room temperature after the reaction to obtain a light yellow solution. 20 mg of p-mercaptobenzoic acid was added to the rapidly stirred 80 mL ethanol solution of molybdenum trioxide nanoparticles prepared above, stirred at room temperature for 15 min, and ultrasonicated for 2 h to obtain non-stoichiometric molybdenum oxide nanoparticles in a blue solution. Ethanol was removed by rotary evaporation at 40°C, redissolved in deionized water, sterile filtered with a 0.22 μm cellulose ester membrane, and stored at 4°C for later use.

Embodiment 2

[0042] The preparation method of functionalized modified non-stoichiometric molybdenum oxide nanocrystals with near-infrared photothermal conversion performance, adding 33mg black molybdenum disulfide powder to 30ml ethanol, adding 0.74mmol H 2 o 2 , stirred rapidly for 15 min, transferred the mixture to a reaction kettle, heated to 150° C., heated for 12 h, and cooled to room temperature after the reaction to obtain a light yellow solution. 10 mg of p-mercaptobenzoic acid was added to the rapidly stirred 30 mL ethanol solution of molybdenum trioxide nanoparticles prepared above, stirred at room temperature for 5 minutes, and ultrasonicated for 4 hours to obtain non-stoichiometric molybdenum oxide nanoparticles in a green solution. Ethanol was removed by rotary evaporation at 40°C, redissolved in deionized water, sterile filtered with a 0.22 μm cellulose ester membrane, and stored at 4°C for later use.

Embodiment 3

[0044] The preparation method of functionalized modified non-stoichiometric molybdenum oxide nanocrystals with near-infrared photothermal conversion performance, adding 30mg black molybdenum disulfide powder to 30ml ethanol, adding 0.6mmol H 2 o 2 , stirred rapidly for 10 min, transferred the mixture to a reaction kettle, heated to 120° C., heated for 10 h, and cooled to room temperature after reaction to obtain a light yellow solution. 5 mg of p-mercaptobenzoic acid was added to the rapidly stirred 35 mL ethanol solution of molybdenum trioxide nanoparticles prepared above, stirred at room temperature for 10 min, and ultrasonicated for 1 h to obtain non-stoichiometric molybdenum oxide nanoparticles in a green solution. Ethanol was removed by rotary evaporation at 40°C, redissolved in deionized water, sterile filtered with a 0.22 μm cellulose ester membrane, and stored at 4°C for later use.

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Abstract

The invention relates to a preparation method of a benzoic acid functionally-modified non-stoichiometric molybdenum oxide nanocrystal. The non-stoichiometric molybdenum oxide nanocrystal with a near-infrared photothermal conversion effect is prepared by introducing p-mercaptobenzoic acid to the surface of a molybdenum trioxide nanoparticle. The invention has the advantages that (1) the prepared functionally-modified non-stoichiometric molybdenum oxide nanocrystal has excellent photothermal conversion performance, and surface active group is provided for the nanoparticle through functionalizedmodification; and (2) the prepared non-stoichiometric molybdenum oxide nanoparticle has excellent photothermal conversion performance and good dispersibility and stability, and can also be used for photothermal sensing detection and photothermal therapy (PTT) of different models of different target objects.

Description

technical field [0001] The invention relates to a preparation method of a functionally modified non-stoichiometric molybdenum oxide nanocrystal with near-infrared photothermal conversion performance and its application as a photothermal agent in the detection and elimination of food-borne pathogenic bacteria. Background technique [0002] Molybdenum oxide is a transition metal oxide and a semiconductor nanomaterial, which is often used in the fields of photocatalysis and energy storage. With the change of oxygen vacancy defect level, the valence state of molybdenum changes from Mo 4+ Convert to Mo 6+ , and the color of the molybdenum oxide aqueous solution also changed from black to blue, and finally to yellow. Non-stoichiometric molybdenum oxide nanoparticles have excellent photothermal performance, low price, low toxicity, mild synthesis method, good biocompatibility and biodegradability. Non-stoichiometric molybdenum oxide nanoparticles can control the carrier concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02B82Y40/00A61K41/00G01N33/569
CPCC01G39/02B82Y40/00A61K41/0052G01N33/56916G01N2333/245Y02A50/30
Inventor 王俊平赵璐李诗洁
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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