CN113952952B - Ag (silver) alloy 2 Mo 2 O 7 /TiO 2 Antibacterial material and preparation method and application thereof - Google Patents

Ag (silver) alloy 2 Mo 2 O 7 /TiO 2 Antibacterial material and preparation method and application thereof Download PDF

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CN113952952B
CN113952952B CN202111043350.2A CN202111043350A CN113952952B CN 113952952 B CN113952952 B CN 113952952B CN 202111043350 A CN202111043350 A CN 202111043350A CN 113952952 B CN113952952 B CN 113952952B
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antibacterial material
acid solution
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CN113952952A (en
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杜锦阁
周建国
李娟�
白义春
倪天军
周兆先
赵凤英
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Xinxiang Medical University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/66—Silver or gold
    • B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/683—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum or tungsten
    • B01J23/686—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum or tungsten with molybdenum
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/088—Radiation using a photocatalyst or photosensitiser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063—Titanium; Oxides or hydroxides thereof
    • B01J35/23—
    • B01J35/39—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Abstract

The invention discloses an Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material and preparation method and application thereof, belonging to the technical field of nano composite antibacterial material. The technical scheme of the invention is as follows: surface roughened TiO 2 Nanoribbon as matrix, passing through narrow band gap Ag 2 Mo 2 O 7 The novel heterojunction Ag is prepared by compounding semiconductors 2 Mo 2 O 7 /TiO 2 The antibacterial material can be used for inactivating escherichia coli by photocatalysis. The heterojunction not only quickens the separation of photo-generated electrons and holes, but also effectively inhibits Ag 2 Mo 2 O 7 Improves the photocatalytic activity and stability of the heterojunction and simultaneously prepares Ag 2 Mo 2 O 7 /TiO 2 As an effective antibacterial material, the antibacterial material is expected to be popularized and applied in pathogen inactivation.

Description

Ag (silver) alloy 2 Mo 2 O 7 /TiO 2 Antibacterial material and preparation method and application thereof
Technical Field
The invention belongs to the technical field of nano antibacterial composite materials, and in particular relates to Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material, and its preparation method and application are provided.
Background
Among the numerous semiconductor photocatalytic materials, titanium dioxide (TiO 2 ) Because of the advantages of no toxicity, low cost, high stability, strong redox performance and the like, the photocatalyst is widely applied to the field of photocatalysis sterilization. But TiO 2 The forbidden bandwidth is large (3.2 eV), only ultraviolet light can be absorbed, and the quantum yield is low, so that the practical application of the quantum efficiency is greatly limited. The composite material can be compounded with a narrow-band semiconductor to improve the absorption capacity of the material to visible light, promote the effective separation of widely-generated charges, and improve TiO 2 One of the effective pathways for photocatalytic activity.
Silver-based semiconductors have received much attention because of their strong light absorption capability, high quantum yield, good photocatalytic activity, and the like. Ag (silver) + With 4 ofd 10 An electron orbit, which can participate in the band formation of a semiconductor, narrows the band gap of a silver-based semiconductor and exhibits a visible light response capability. Meanwhile, the effective mass of photo-generated holes and electrons of the silver semiconductor is small, so that the rapid migration of photo-generated charges is facilitated. Therefore, the silver semiconductor has good visible light response performance and faster photo-generated charge migration rate, and is widely applied to the field of photocatalysis disinfection and sterilization. TiO is mixed with 2 Combines the advantages of silver semiconductor, not only expands TiO 2 The light absorption range of visible light is improved, the utilization rate of the visible light is improved, the separation of photo-generated electrons and holes is promoted, and the photocatalytic antibacterial activity of the material is improved.
Silver molybdate (Ag) 2 Mo 2 O 7 ) Is an emerging silver semiconductor photocatalysis material, the valence band top of the material is formed by hybridization of Ag 4d and O2 p orbitals, and the existence of the hybridization orbitals reduces Ag 2 Mo 2 O 7 Is a band gap energy of (c). Ag (silver) 2 Mo 2 O 7 The band gap energy of monoclinic system and triclinic system are 2.98eV and 2.65eV respectively, which can absorb visible light, and have high chemical activity, and are recently used in the field of wastewater purification. Furthermore, ag 2 Mo 2 O 7 As a novel inorganic antibacterial agent, it has a broad-spectrum antibacterial property and is attracting attention. But Ag is 2 Mo 2 O 7 There are also disadvantages such as narrow absorption range, easy generation of Ag simple substance due to photo-corrosion, and possible occupation of Ag by Ag simple substance 2 Mo 2 O 7 Thereby reducing Ag 2 Mo 2 O 7 Is a component of the photocatalytic activity of the catalyst.
Disclosure of Invention
In order to solve the technical problems, the invention provides an Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material and preparation method thereof, wherein the method adopts TiO with roughened surface 2 Nanoribbon as matrix, passing through narrow band gap Ag 2 Mo 2 O 7 The novel heterojunction Ag is prepared by compounding semiconductors 2 Mo 2 O 7 /TiO 2 The antibacterial material can be used for inactivating escherichia coli by photocatalysis.
The invention adopts the following technical proposal to solve the technical problems, namely Ag 2 Mo 2 O 7 /TiO 2 The preparation method of the antibacterial material is characterized by comprising the following specific steps:
step S1: dispersing P25 into NaOH solution, performing hydrothermal reaction at 180 ℃ for 48 hours, cooling to room temperature, washing with deionized water to neutrality, dispersing in hydrochloric acid solution, stirring for 24 hours, adding the material treated by the hydrochloric acid solution into strong acid solution, stirring and stirring at 100 DEG C o C, reacting for 12h, washing with water to be neutral, and washing with water at 70 o C, drying, heating to 500 ℃ in a muffle furnace at a heating rate of 5 ℃/min, calcining for 2 hours, and naturally cooling to room temperature to obtain whiteThe color product is TiO with rough surface 2 A nanobelt;
step S2: tiO obtained in the step S1 2 Dispersing the nano belt into an ammonium molybdate solution, stirring, adding a silver nitrate solution, regulating the pH value of a mixed system to be 6, continuously stirring for 2 hours, transferring the obtained suspension into a reaction kettle, reacting for 12 hours at 150 ℃, cooling to room temperature, centrifuging, washing and drying to obtain Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material.
As a further improvement of the present invention, the concentration of the hydrochloric acid solution in step S1 is 0.1M.
As a further improvement of the present invention, the strong acid solution in step S1 is a 0.02M sulfuric acid solution.
The invention also provides Ag prepared by the preparation method 2 Mo 2 O 7 /TiO 2 Antibacterial material which makes full use of TiO 2 And Ag 2 Mo 2 O 7 Has excellent synergistic antibacterial effect, and at the same time, due to TiO 2 And Ag 2 Mo 2 O 7 A heterojunction is formed between the two, the separation of the widely generated electron-hole pairs is promoted, and the Ag is greatly inhibited 2 Mo 2 O 7 The stability of the heterojunction material is improved. Thus Ag 2 Mo 2 O 7 /TiO 2 As an effective antibacterial material, the antibacterial material is expected to be popularized and applied in pathogen inactivation.
As a further improvement of the invention, the Ag 2 Mo 2 O 7 /TiO 2 The application of the antibacterial material in the photocatalysis inactivation of escherichia coli.
The invention has the following advantages and beneficial effects: ag prepared by the method 2 Mo 2 O 7 /TiO 2 TiO in antibacterial material 2 The nanobelt surface is composed of particles with a size of about 20nm, and the rough surface improves TiO 2 Provides more active sites for the reaction. Meanwhile, in the preparation of Ag 2 Mo 2 O 7 /TiO 2 In the process of the antibacterial material, the surface is roughFunctionalized TiO 2 The nanobelts provide more nucleation centers for the reaction, allowing Ag to react + Uniformly distributed in TiO 2 Surface, leading to Ag 2 Mo 2 O 7 Uniformly and tightly growing on TiO in the form of nano particles 2 The surface of the nano belt forms Ag 2 Mo 2 O 7 /TiO 2 And a heterojunction. The heterojunction not only quickens the separation of photo-generated electrons and holes, but also effectively inhibits Ag 2 Mo 2 O 7 The photo-etching of the heterojunction improves the photo-catalytic activity and stability of the heterojunction.
Drawings
FIG. 1 is a schematic diagram of TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 FESEM of (C);
FIG. 2 is a schematic diagram of TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 XPS graph of (2);
FIG. 3 is a TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 An XRD pattern of (a);
FIG. 4 shows TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 An ultraviolet-visible diffuse reflectance spectrum of (c);
FIG. 5 is a TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Photocurrent and EIS profiles of (a);
FIG. 6 is a diagram of TiO according to an embodiment of the present invention 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 (40. Mu.g/mL) against E.coli (1.6X10) 7 cfu/mL): (a) dark conditions, (b) light conditions;
FIG. 7 shows the Ag obtained in accordance with this example 2 Mo 2 O 7 /TiO 2 FESEM of treated E.coli (40. Mu.g/mL): (a) 0min, (b) 5min, (c) 15min, (d) 30min, (e) 45min, and (f) 60min.
Detailed Description
The above-described matters of the present invention will be described in further detail by way of examples, but it should not be construed that the scope of the above-described subject matter of the present invention is limited to the following examples, and all techniques realized based on the above-described matters of the present invention are within the scope of the present invention.
Examples
Ag 2 Mo 2 O 7 /TiO 2 Preparation of antibacterial material:
0.8g of P25 was dispersed in 80mL of NaOH solution (10M), stirred for 1h, then transferred to a 100mL reaction vessel, kept at 180℃for 48h, cooled to room temperature, washed with deionized water to neutrality, dispersed in hydrochloric acid solution (0.1M), and stirred continuously for 24h. The material was then transferred to 80mL of H 2 SO 4 Stirring the solution (0.02M) continuously, transferring the material into a reaction kettle, and adding the material into the reaction kettle at 100 o C for 12h, washing with deionized water to neutrality, washing with deionized water at 70 o C, drying, calcining in a muffle furnace at 600 ℃ for 2h (the heating rate is 5 ℃ per min), and naturally cooling to room temperature to obtain white product which is TiO with rough surface 2 A nanobelt.
An ammonium molybdate solution (250. Mu.L) having a concentration of 27.22mg/mL was added to distilled water (60 mL), and after stirring for 30min, 0.1g of the above-prepared TiO was added 2 The nano belt is stirred for 1 hour continuously, so that ammonium molybdate is uniformly dispersed in TiO 2 Adding 250 mu L of silver nitrate solution with the concentration of 26.19mg/mL on the surface of the nano belt, regulating the pH value (pH=6) of the mixed system, continuously stirring for 2 hours, transferring the liquid into a reaction kettle, maintaining at 150 ℃ for 12 hours, cooling to room temperature, washing with deionized water, and drying to obtain Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material. Pure Ag 2 Mo 2 O 7 In the absence of TiO 2 Is prepared under the condition of (2).
Ag 2 Mo 2 O 7 /TiO 2 Surface of antibacterial materialThe sign is as follows:
FIG. 1 is a TiO film prepared in this example 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Is a FESEM image of (C). From the figure, it can be seen that TiO 2 The surface of the material is rough, and more active sites can be provided for reaction. Pure Ag 2 Mo 2 O 7 The rod-shaped structure has a width of 1-3 μm. Ag (silver) 2 Mo 2 O 7 /TiO 2 No Ag was observed in the bacteriostatic material 2 Mo 2 O 7 Due to the rod-like structure of TiO 2 The particles on the surface of the nano belt provide more reaction sites for reaction, so that Ag + Uniformly distributed in TiO 2 Surface, leading to Ag 2 Mo 2 O 7 Uniformly and tightly growing on TiO in the form of nano particles 2 A nanobelt surface.
FIG. 2 is a TiO film prepared in this example 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Is a XPS spectrum of (C). As can be seen from FIG. 2a, ag 2 Mo 2 O 7 /TiO 2 Ti 2p in antibacterial material 3/2 And Ti 2p 1/2 The binding energy positions are 458.6eV and 464.3eV respectively, compared with pure TiO 2 Medium Ti 4+ Is Ti 2p of (2) 3/2 And Ti 2p 1/2 Low, indicating Ag 2 Mo 2 O 7 And TiO 2 Forming a heterojunction therebetween. Pure TiO 2 The binding energy of the mesolattice oxygen and the surface adsorbed-OH is 530.0eV and 531.3eV respectively, ag 2 Mo 2 O 7 The binding energy of O1 s in the catalyst is 530.3eV and 531.5eV respectively, and Ag 2 Mo 2 O 7 /TiO 2 The binding energy of O1 s in the antibacterial material is lower than that of pure TiO 2 And Ag 2 Mo 2 O 7 Further description of Ag 2 Mo 2 O 7 And TiO 2 Forming a heterojunction therebetween (fig. 2 b). As can be seen from FIGS. 2c-d, with pure Ag 2 Mo 2 O 7 In comparison with Ag 2 Mo 2 O 7 /TiO 2 The binding energy of Mo 3d in the antibacterial material is lower than that of pure Ag 2 Mo 2 O 7 While Ag + Ag3d of (2) 5/2 And Ag3d 3/2 Is higher than pure Ag 2 Mo 2 O 7 . The combination energy of Ti, O, ag and Mo is shifted simultaneously, which indicates TiO 2 And Ag 2 Mo 2 O 7 There is an interaction between them, forming a heterojunction.
FIG. 3 is a TiO film prepared in this example 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Is a XRD pattern of (C). In the figure, pure TiO 2 Diffraction peak positions of (3) are 25.28 DEG, 37.80 DEG and 48.05 DEG, respectively, corresponding to (101), (004) and (200) crystal planes, respectively, and anatase TiO 2 (JCPDS No. 78-2486) is completely anastomosed. Pure Ag 2 Mo 2 O 7 Diffraction peak positions were 14.00 °, 23.52 °, 28.31 °, 32.51 °, and 32.90 °, respectively (JCPDS nos. 75-1505). In Ag 2 Mo 2 O 7 /TiO 2 TiO is clearly observed in the sample 2 But no Ag was observed 2 Mo 2 O 7 Possibly due to Ag 2 Mo 2 O 7 The content is low.
FIG. 4 shows the TiO composition of this example 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Is a UV-vis spectrum of (C). From the figure, pure TiO 2 The absorption band edge of (2) is about 400nm, and can only absorb ultraviolet light. Ag (silver) 2 Mo 2 O 7 The absorption band edge of (2) is about 490nm. And pure TiO 2 In comparison with Ag 2 Mo 2 O 7 /TiO 2 The absorption band edge of the antibacterial material is obviously red shifted, which shows that the photoresponse range of the antibacterial material is wider than that of TiO 2 Wide.
FIG. 5 shows the TiO of this example 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 Photocurrent response curves and alternating current impedance diagrams (EISs). As can be seen from FIG. 6a, ag 2 Mo 2 O 7 /TiO 2 The photocurrent signal of the antibacterial material is obviously stronger than that of pure TiO 2 And Ag 2 Mo 2 O 7 The strongest photocurrent signal of AMT-10 indicates Ag 2 Mo 2 O 7 /TiO 2 The antibacterial material has the best charge separation performance. As can be seen from FIG. 6b, ag 2 Mo 2 O 7 /TiO 2 The arc radius of the alternating current impedance curve of the antibacterial material is minimum, which shows that the impedance of charge transfer is minimum and the charge separation degree is highest.
Bacteriostasis test:
the specific sterilization process is as follows: 50 mu L of Ag 2 Mo 2 O 7 /TiO 2 Adding antibacterial material dispersion (4 mg/mL) into 1.6X10 6 In cfu/mL bacterial suspension (10 mL), a 300W xenon lamp is used as a light source for irradiation, and an AM1.5G filter is added to a light source lamp holder. 500. Mu.L of the sample was sampled every 30 minutes, and diluted with 0.85wt% physiological saline. Then 1mL of diluted liquid is added into a culture plate, 10-13mL of solid culture medium is poured into the culture plate, the culture plate is transferred into a constant temperature incubator, and the culture is carried out for 24 hours at 37 ℃. The number of colonies formed in the different cases was counted. Three parallel experiments are carried out in the sterilization experiment, and the average value of the three experimental data is taken as the final experimental data.
FIG. 6 is TiO 2 、Ag 2 Mo 2 O 7 And Ag 2 Mo 2 O 7 /TiO 2 And (3) an inactivation effect on escherichia coli. As can be seen from FIG. 6a, the prepared material has no obvious effect on bacterial inactivation under dark conditions, indicating Ag 2 Mo 2 O 7 /TiO 2 The antibacterial material has small cytotoxicity to the escherichia coli. Under simulated sunlight conditions (FIG. 6 b), tiO was exposed to light for 60 minutes 2 And Ag 2 Mo 2 O 7 The number of living cells in the system was 6.5log and 6.7log, respectively, while Ag 2 Mo 2 O 7 /TiO 2 The antibacterial material can completely inactivate the escherichia coli, which shows that Ag 2 Mo 2 O 7 /TiO 2 The antibacterial material has higher photocatalytic sterilization activity. This is probably due to Ag 2 Mo 2 O 7 And TiO 2 And a heterojunction is formed between the two layers, so that the effective separation of photo-generated charges is promoted.
FIG. 7 is a graph of Ag-based composition 2 Mo 2 O 7 /TiO 2 FESEM of treated E.coli. Coli without light treatment had a smooth surface, a length of about 1-2 μm and a complete structure (FIG. 7 a). After 5 minutes of illumination, pits appear on the bacterial surface (FIG. 7 a), indicating that the cell wall and membrane of E.coli begin to oxidize by the active species in the system. As the illumination time was prolonged, the cell deformation was severe (FIGS. 7 c-e), and the E.coli cells were completely deformed when illuminated for 60 minutes (FIG. 7 f).
Various modifications may be made to the above disclosure by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore not limited to the above description, but is instead determined by the scope of the claims.

Claims (4)

1. Ag (silver) alloy 2 Mo 2 O 7 /TiO 2 The antibacterial material is characterized in that: the Ag is 2 Mo 2 O 7 /TiO 2 Ag in antibacterial material 2 Mo 2 O 7 Uniformly and tightly growing on TiO in the form of nano particles 2 The surface of the nano-belt forms a heterojunction;
the Ag is 2 Mo 2 O 7 /TiO 2 The specific preparation steps of the antibacterial material are as follows:
step S1: dispersing P25 into NaOH solution, performing hydrothermal reaction at 180 ℃ for 48 hours, cooling to room temperature, washing with deionized water to neutrality, dispersing in hydrochloric acid solution, stirring for 24 hours, adding the material treated by the hydrochloric acid solution into strong acid solution, stirring and stirring at 100 DEG C o C, reacting for 12h, washing with water to be neutral, and washing with water at 70 o C, drying, then heating to 500 ℃ in a muffle furnace at a heating rate of 5 ℃/min, calcining for 2 hours, and naturally cooling to room temperature to obtain white product, namely the TiO with rough surface 2 A nanobelt;
step S2: tiO obtained in the step S1 2 Dispersing the nano belt into ammonium molybdate solution, stirring, adding silver nitrate solution, regulating pH value of the mixed system to 6, continuously stirring for 2h, transferring the obtained suspension into a reaction kettle, reacting at 150 ℃ for 12h, cooling to room temperature, and performing reactionCentrifuging, washing and drying to obtain Ag 2 Mo 2 O 7 /TiO 2 Antibacterial material.
2. Ag according to claim 1 2 Mo 2 O 7 /TiO 2 The antibacterial material is characterized in that: the concentration of the hydrochloric acid solution in step S1 was 0.1M.
3. Ag according to claim 1 2 Mo 2 O 7 /TiO 2 The antibacterial material is characterized in that: the strong acid solution in step S1 is a 0.02M sulfuric acid solution.
4. The Ag of claim 1 2 Mo 2 O 7 /TiO 2 The application of the antibacterial material in the photocatalysis inactivation of escherichia coli.
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Ag_3VO_4/Ag_2Mo_2O_7复合光催化剂;丁雨阳;刘振东;马臻;;复旦学报(自然科学版)(第05期);第112-120页 *
The effective photocatalysis and antibacterial properties of AgBr/Ag2MoO4@ZnO composites under visible light irradiation;Huihui Xu等;《Biofouling》;第35卷(第7期);第719-731页 *

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