Preparation of antibacterial agent based on MXene quantum dots and antibacterial activity testing method

An antibacterial agent and quantum dot technology, which is applied in the field of semiconductor materials and antibacterial applications, can solve the problems of easy discoloration, difficult manufacturing, complex process, etc., and achieve the effect of simple preparation method, low cost and environmental friendliness

Active Publication Date: 2020-06-09
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of inorganic antibacterial agents are good heat resistance (>600°C), wide antibacterial range, strong antibacterial power, and high safety. However, it is difficult to manufacture, complex in process, easy to change color, and different metals are also limited in application.

Method used

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  • Preparation of antibacterial agent based on MXene quantum dots and antibacterial activity testing method
  • Preparation of antibacterial agent based on MXene quantum dots and antibacterial activity testing method
  • Preparation of antibacterial agent based on MXene quantum dots and antibacterial activity testing method

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Experimental program
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Embodiment 1

[0031] Electrochemical preparation of Ti 3 C 2 QDs as an example, specifically: using bulk commercial Ti 3 AlC 2 As the working electrode, platinum wire as the counter electrode, tetramethylammonium hydroxide (TMA OH) and NH 4 Cl solution was mixed as electrolyte, and MQDs were prepared by two-electrode system constant potential method using CHI 660D electrochemical workstation; the scanning voltage and scanning time were 0.1V and 1h, respectively; the prepared electrolyte was centrifuged at 8000r / min for 15 minutes, Get the supernatant and centrifuge again, repeat several times until there is no precipitation in the solution; the solution is filtered with a 220nm aqueous polyethersulfone syringe filter and continuously dialyzed with a 21mm (MD25) dialysis bag for 3 days to obtain an aqueous solution of MQDs (0.12mg / mL).

[0032] Then UV / H was applied to the prepared MQDs 2 o 2 Control and prepare carboxylated MQDs, specifically: pour 4 mL of MQDs solution into a 10 mL ...

Embodiment 2

[0039] Preparation of Ti by Electrochemical Method 3 C 2 QDs, specifically: MQDs prepared by a two-electrode system potentiostatic method; bulk commercial Ti 3 AlC 2 As the working electrode, platinum wire as the counter electrode, tetramethylammonium hydroxide (TMA OH) and NH 4 The Cl solution was mixed into an electrolyte, using a CHI 660D electrochemical workstation; the scanning voltage and scanning time were 0.2V and 30 minutes, respectively; the prepared electrolyte was centrifuged at 9000r / min for 5 minutes, the supernatant was taken and centrifuged again, and repeated After several times until there was no precipitation in the solution; the solution was filtered with a 220nm aqueous polyethersulfone syringe filter and continuously dialyzed with a 21mm (MD25) dialysis bag for 3 days to obtain an aqueous solution of MQDs (0.12mg / mL).

[0040] UV / H on the prepared MQDs 2 o 2 Control and prepare carboxylated MQDs, specifically: pour 4 mL of MQDs solution into a 10 mL ...

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Abstract

The invention discloses preparation of an antibacterial agent based on MXene quantum dots and an antibacterial activity testing method, and relates to the field of antibacterial application. Carboxylated MQDs are prepared by combining an electrochemical method and a photochemical method. Firstly, the MQDs are prepared by using the electrochemical method, and Ti3AlC2 is polymerized into Ti3C2 quantum dots in an electrolyte solution. Then, carboxylated MQDs are prepared by using the photochemical method, and hydroxyl radicals generated by H2O2 under ultraviolet irradiation react with the MQDs tofinally obtain the MQDs of which the surfaces contain a large number of carboxyl functional groups. The Ti3C2T<x> MXene quantum dots (MQDs) derived from the two-dimensional MXene material have the advantages that the excellent conductivity, temperature and chemical stability of the original MXene layered material are reserved, good water solubility, biocompatibility and low toxicity are also shown, so that the Ti3C2T<x> MXene quantum dot have a great application potential in the antibacterial field.

Description

technical field [0001] The present invention relates to antibacterial application field, be specifically related to a kind of MXenes based on carboxylation (such as: Ti 3 C 2 ) The preparation of novel antibacterial agent of quantum dots and the antibacterial activity testing method belong to the field of semiconductor materials. Background technique [0002] Antibacterial agents are a class of substances or products with antibacterial and bactericidal properties, and are the core of antibacterial materials. Among antibacterial agents, inorganic antibacterial agents are mainly antibacterial agents made by utilizing the bactericidal or bacteriostatic ability of silver, copper, zinc, titanium, mercury, lead and other metals and their ions. The advantages of inorganic antibacterial agents are good heat resistance (>600°C), wide antibacterial range, strong antibacterial power, and high safety. However, it is difficult to manufacture, complex in process, easy to change color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00C12Q1/18
CPCA01N59/16C12Q1/18
Inventor 李妍姜尚佐王钊张莎
Owner UNIV OF SCI & TECH BEIJING
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