CN-116092814-B - Recovery type Fe2O3@TiO2@MoS2Preparation method of nano antibacterial magnetic material

Abstract

The invention belongs to the technical field of nano material preparation and sterilization application, and relates to a preparation method and application of a recycled Fe 2 O 3 @TiO 2 @MoS 2 nano antibacterial magnetic material, wherein Fe 2 O 3 is synthesized by a one-step solvothermal method, a layer of TiO 2 is wrapped by using the Fe 2 O 3 as a core through a mechanical stirring method to obtain Fe 2 O 3 @TiO 2 powder, then MoS 2 is hydrothermally synthesized by using L-cysteine and sodium molybdate as precursors, then MoS 2 and the Fe 2 O 3 @TiO 2 powder are transferred into a reaction kettle together for high-temperature reaction, and after cooling at room temperature, the Fe 2 O 3 @TiO 2 @MoS 2 nano antibacterial magnetic material is obtained through washing and drying. The nano material has excellent peroxidase-like performance, photocatalytic performance, recoverable magnetism and antibacterial performance, and the preparation method is simple, good in antibacterial effect, harmless to human bodies, green and pollution-free in the whole process, environment-friendly in application and wide in market prospect.

Inventors

• NIU YUSHENG
• SUN YIPING
• YUE WENHUI
• XU YUANHONG

Assignees

• 青岛大学

Dates

Publication Date

20260505

Application Date

20230220

Claims (7)

1. 1. The preparation method of the recycled Fe 2 O 3 @TiO 2 @MoS 2 nanometer antibacterial magnetic material is characterized by comprising the following specific steps of: (1) Fe 2 O 3 , namely preparing Fe 2 O 3 particles by taking FeCl 3 •2H 2 O and NaOAC as iron precursors and adopting a one-step solvothermal method; (2) The preparation of Fe 2 O 3 @TiO 2 , wherein Fe 2 O 3 particles are taken as cores, a layer of TiO 2 is wrapped by a mechanical stirring method to prepare Fe 2 O 3 @TiO 2 powder, the specific process of the step (2) is that after Fe 2 O 3 particles are fully mixed with deionized water and absolute ethyl alcohol, mixed solution of tetrabutyl orthotitanate and absolute ethyl alcohol is introduced at 70-105 ℃, after mechanical stirring is carried out for 60-120 minutes, distilled water and ethanol are used for washing and drying, and then air calcination is carried out for 1-4 hours in a tubular furnace at 300-600 ℃ to obtain Fe 2 O 3 @TiO 2 powder; (3) Preparing Fe 2 O 3 @TiO 2 @MoS 2 , namely hydrothermally synthesizing MoS 2 by taking L-cysteine and sodium molybdate as precursors, transferring MoS 2 and Fe 2 O 3 @TiO 2 powder into a reaction kettle together, keeping the temperature at 200 ℃ for 10-30 hours, cooling at room temperature, and washing and drying to obtain the Fe 2 O 3 @TiO 2 @MoS 2 nano antibacterial magnetic material.
2. 2. The preparation method of the recovered Fe 2 O 3 @TiO 2 @MoS 2 nanometer antibacterial magnetic material according to claim 1, wherein the specific process of the step (1) is that FeCl 3 •2H 2 O and NaOAC are added into glycol and then placed into a reaction kettle, after high temperature treatment at 200 ℃ is carried out for 5-15 h, cooling is carried out at room temperature, centrifugation is carried out, sediment is collected, and then the obtained sediment is washed and dried by ethanol and distilled water for multiple times, thus obtaining Fe 2 O 3 particles.
3. 3. The method for preparing the recycled Fe 2 O 3 @TiO 2 @MoS 2 nanometer antibacterial magnetic material according to claim 1, wherein the Fe 2 O 3 @TiO 2 @MoS 2 nanometer material is composed of nano flower-shaped MoS 2 and Fe 2 O 3 @TiO 2 nanospheres, and has magnetic recycling property.
4. 4. The method for preparing the recycled Fe 2 O 3 @TiO 2 @MoS 2 nanometer antibacterial magnetic material according to claim 1, wherein the Fe 2 O 3 @TiO 2 @MoS 2 nanometer material has peroxidase activity, can catalyze hydrogen peroxide to generate hydroxyl free radicals, and can inhibit bacteria.
5. 5. The method for preparing the recycled Fe 2 O 3 @TiO 2 @MoS 2 nanometer antibacterial magnetic material according to claim 1, wherein the Fe 2 O 3 @TiO 2 @MoS 2 nanometer material has absorption in a visible light region and has photocatalytic properties.
6. 6. A Fe 2 O 3 @TiO 2 @MoS 2 nanomaterial made by the method of claim 1.
7. 7. Use of the Fe 2 O 3 @TiO 2 @MoS 2 nanomaterial according to claim 6 as a bacteriostatic material.

Description

Preparation method of recycled Fe 2O3@TiO2@MoS2 nanometer antibacterial magnetic material Technical field: The invention belongs to the technical field of nano material preparation and performance detection, and relates to a preparation method of a recycled Fe 2O3@TiO2@MoS2 nano antibacterial magnetic material and application thereof in sterilization occasions, wherein a hydrothermal method and a mechanical stirring method are used for preparing a Fe 2O3@TiO2@MoS2 nano magnetic material, and the purpose of sterilization is achieved by utilizing the enzyme-like property and photocatalytic property of the Fe 2O3@TiO2@MoS2 nano magnetic material, so that the antibacterial effect is good and the antibacterial magnetic material is harmless to human bodies. The background technology is as follows: at present, the importance of water resources to human beings is self-evident, and is one of the most important resources for human beings to survive and develop. However, with the development of the social industry and the discharge of domestic sewage, water resources are polluted. In particular, the spread of antibiotic resistance poses a serious threat to global public health, not only bringing great risk to public health, but also bringing great burden to world economy. Thus, great contributions are made to the antibiotic industry. However, as antibiotics are generalized and abused, multidrug resistant bacteria are rampant and new alternatives are urgently needed to eradicate the multidrug resistant bacteria. In recent years, bacterial treatments based on ROS have been of interest, including OH, H 2O2、1O2、O2·-, etc., whose strong oxidizing properties can lead to bacterial apoptosis. The nano particles are used as inorganic nano materials with natural enzyme activity, have the advantages of low cost, high stability, strong durability and the like, particularly have peroxidase-like activity, can catalyze H 2O2 to generate OH, and have strong antibacterial activity. In order to enhance the antibacterial effect, a nano material composite material is developed and designed, different catalytic reactions can be carried out simultaneously, various catalytic activities are exerted to enhance the antibacterial activity, and a potential synergistic antibacterial mechanism is provided. Molybdenum disulfide (MoS 2) nano material is taken as an inherent peroxidase-like catalyst, and is paid attention to due to excellent physical properties and application prospects in photocatalytic reactions. In the prior art, photocatalysis has the advantages of low cost, low energy consumption, environmental friendliness, sustainable development and the like, and is a very promising method. The visible light source is abundant, easy to obtain and pollution-free. The effective utilization of solar energy for photocatalysis has important significance. Titanium dioxide (TiO 2) is an interesting semiconductor material that has been widely studied for environmental applications due to its chemical inertness, strong oxidizing power, cost effectiveness and long-term stability to light and chemical corrosion. The wide bandgap energy (Eg) of 3.0-3.2eV can absorb ultraviolet light to generate electrons (e -) and holes (h +), thereby providing favorable conditions for oxidation-reduction reaction. In order to further increase the photocatalytic efficiency of TiO 2 -based catalysts, many efforts have been made, including the use of vacancy engineering, ion doping and heterojunction approaches corresponding to rapid electron-hole separation. One of the strategies to increase the charge mobility of TiO 2 is to use various co-catalysts with exposed two-dimensional MoS 2 edges, which have excellent photocatalytic properties and more catalytically active sites. The MoS 2/TiO2 nanocomposite is one of the best candidates to promote excellent energy and environmental performance due to its great crystal modification potential in terms of conductivity, aspect ratio and ultra-thin edges. For example, china patent application CN201910396051.3 discloses a MoS2/TiO2 composite photocatalyst, which is prepared by adopting a hydrothermal method, meanwhile, the MoS2/TiO2 nano aerogel composite material is paved on a base plate in an indoor decoration project, an aerogel layer is formed after solidification, toluene generated indoors can be degraded under the photocatalysis condition, china patent application CN201811359989.X discloses a preparation method of flower-shaped MoS2/TiO2 photocatalyst assembled by nano sheets under the condition of no surfactant and template by adopting a solvothermal method, the flower-shaped Ni-doped MoS2 structure assembled by nano sheets is obtained, then an ultrathin TiO2 layer is coated on the surface by adopting an atomic layer deposition technology, the flower-shaped Ni-doped MoS2/TiO2 photocatalyst with excellent catalytic performance is obtained, the Ni-doped MoS2/TiO2 photocatalyst with strong stability and high catalytic acti