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Ag-MoS2@TiO2 nano photocatalytic sterilization material and preparation method thereof

A technology of nano-light and nano-titanium dioxide, which is applied in the field of preparation of MoS2 quantum dot composite TiO2 nano-photocatalytic bactericidal material, can solve the problems of limiting the killing effect of silver ions, not easy to absorb by cells, and easy to decompose when exposed to light, so as to improve quantum production. High efficiency, simple operation, and short time-consuming effect

Inactive Publication Date: 2020-07-17
杜燃(佛山)环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently commonly used silver ion-containing bactericidal disinfectants have some inherent defects, such as silver ions are easily consumed by chloride ions, easily decomposed by exposure to light, and difficult to be absorbed by cells, which greatly limits the killing effect of silver ions; If the killing effect is achieved simply by increasing the dose, it will cause immeasurable harm to the human body and the environment.
Silver ions, as a dissolution-type disinfectant, are easy to cause damage to the skin with the flow of water when used, and are lost to the water body to cause environmental pollution.

Method used

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  • Ag-MoS2@TiO2 nano photocatalytic sterilization material and preparation method thereof
  • Ag-MoS2@TiO2 nano photocatalytic sterilization material and preparation method thereof
  • Ag-MoS2@TiO2 nano photocatalytic sterilization material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The Ag-MoS of this example 2 @TiO 2 The preparation method of nanometer photocatalytic bactericidal material comprises the following steps:

[0036] (1) Mix and grind nano-titanium dioxide, molybdenum disulfide and chitosan according to the ratio of 75:1:2 for 20 minutes to obtain mixed powder;

[0037] (2) Add N-methylpyrrolidone to the mixed powder, stir and mix to obtain a mixed solution, wherein the mass ratio of nano-titanium dioxide to N-methylpyrrolidone is 1:100;

[0038] (3) Put the mixture in an ultrasonic cleaning machine for 1 hour, and the power of ultrasonic treatment is 250W;

[0039] (4) Heat the ultrasonically treated mixture to 120°C and react for 2.5 hours;

[0040] (5) Add AgNO to the reaction solution in step (4) 3 The solution was stirred at room temperature for 1 hour at a stirring speed of 500 rpm, wherein AgNO 3 Ag in solution + The concentration is 1000ppm;

[0041] (6) Evaporate the heat-treated mixed solution at 100°C until it becomes ...

Embodiment 2

[0047] The main technical solution of this embodiment is basically the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. The difference between this embodiment and embodiment 1 is:

[0048] (1) Grinding nano titanium dioxide, molybdenum disulfide and chitosan for 30 minutes to obtain mixed powder;

[0049] (2) The mass ratio of nano-titanium dioxide to N-methylpyrrolidone is 1:1000;

[0050] (3) Ultrasonic treatment for 0.5 hours, the power of ultrasonic treatment is 200W;

[0051] (4) Heat treatment to 110°C and react for 2 hours;

[0052] (5) Add AgNO 3 The solution was stirred at room temperature for 50 minutes

[0053] (6) Evaporate to dryness at 80°C until it becomes powder.

Embodiment 3

[0055] The main technical solutions of this embodiment are basically the same as those of Embodiment 1 or Embodiment 2, and the features not explained in this embodiment are explained in Embodiment 1 or Embodiment 2, and will not be repeated here. The difference between this embodiment and embodiment 1 is:

[0056] (1) Grinding nano titanium dioxide, molybdenum disulfide and chitosan for 10 minutes to obtain mixed powder;

[0057] (2) The mass ratio of nano titanium dioxide to N-methylpyrrolidone is 1:10;

[0058] (3) Ultrasonic treatment for 2 hours, the power of ultrasonic treatment is 300W;

[0059] (4) Heat treatment to 140°C and react for 4 hours;

[0060] (5) Add AgNO 3 The solution was stirred at room temperature for 70 minutes

[0061] (6) Evaporate to dryness at 90°C until it becomes powder.

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Abstract

The invention discloses an Ag-MoS2@TiO2 nano photocatalytic sterilization material and a preparation method thereof. Chitosan is applied to the reaction of nano titanium dioxide, molybdenum disulfideand silver ions, so that the prepared Ag-MoS2@TiO2 nano material keeps a good in-situ dispersion characteristic, the catalytic efficiency of titanium dioxide in natural light is improved, and an excellent sterilization effect is achieved. According to the method disclosed by the invention, a MoS2 lamella is opened by using high-frequency and high-energy ultrasonic treatment, and MoS2 can be crushed at 110-140 DEG C, so that MoS2 small molecules subjected to fault crushing can be doped into nano titanium dioxide crystals. The Ag-MoS2@TiO2 nano material prepared by the method disclosed by the invention is uniform in size, good in dispersity, good in photocatalysis effect and good in sterilization effect.

Description

technical field [0001] The invention relates to the technical field of photocatalytic bactericidal materials, in particular to a method for preparing Ag ion-loaded MoS2 quantum dot composite TiO2 nanometer photocatalytic bactericidal materials. Background technique [0002] Photocatalytic technology is a very effective technology to solve environmental pollution and energy crisis. Titanium dioxide (TiO 2 ) is an important inorganic photocatalytic material. Titanium dioxide has the advantages of high photocatalysis, high stability, and low toxicity. TiO 2 Under the irradiation of ultraviolet rays, photocatalytic reaction can occur, and organic matter can be decomposed into carbon dioxide and water, which can be used to remove organic matter, sterilize, disinfect, and treat sewage. At the same time, by TiO 2 The formed film has photocatalytically induced superhydrophilic properties, making it self-cleaning, easy to clean, waterproof and fog-proof, and has attracted widespre...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00B01J27/051B01J23/50C02F1/30
CPCA01N59/16A01N25/08B01J27/051B01J23/50C02F1/30C02F2305/10C02F2101/308B01J35/23B01J35/39
Inventor 张天启张洛忠田学英韦勤合韦卿
Owner 杜燃(佛山)环保科技发展有限公司
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