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Preparation method of ag-tio2-mmt composite photocatalyst

A technology of catalyst and composite light, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, botany equipment and methods, etc. It can solve the problems affecting the service life and efficiency of catalysts, the difficulty of recycling nanocomposites, and the effect of degrading bacteria. problem, to achieve the effect of fewer types, lower equipment requirements, and good dispersion

Inactive Publication Date: 2011-03-30
SHANGHAI JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

[0004] However, the very small TiO on the Ag nanoparticles surface modification 2 There is a problem with nanoparticle composites: catalytic materials should be easy to recycle, and such small nanocomposites are difficult to recycle, which will affect the service life and efficiency of the catalyst
However with Ag-TiO 2 Compared with -MMT composite photocatalyst, there are still some shortcomings. First, the particle size of Ag-AgBr-P25 composite material is small and difficult to recycle, while Ag-TiO 2 -Ag and TiO in MMT composite photocatalyst 2 The nanoparticles are all adsorbed on the surface of the larger MMT and are easy to recover; secondly, the adsorption of Ag-AgBr-P25 composites is not as good as that of Ag-TiO 2 -MMT composite photocatalyst is strong, so it affects the effect of degrading bacteria

Method used

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  • Preparation method of ag-tio2-mmt composite photocatalyst
  • Preparation method of ag-tio2-mmt composite photocatalyst
  • Preparation method of ag-tio2-mmt composite photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1 prepares gained Ag-TiO 2 - The repeated performance test of the MMT composite photocatalyst is as follows:

[0047] The catalyst after the above reaction is recovered and irradiated with ultraviolet light for 1 to 2 hours, so that the organic matter adsorbed on the surface can be rapidly and completely degraded. Then put it into 50mL colony number 1×10 6 Each / mL suspension, repeat the photocatalysis and plating experiments. After the end, directly put the 0.5mL colony number 1×10 8 Each / mL suspension was added to the suspension after the above reaction, and the reaction of the next cycle was directly started. This was repeated 4 times, and the recorded results are shown in Figure 7. It can be seen from the figure that after 5 repeated experiments, the performance of the catalyst is still the same as when it was used for the first time.

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Abstract

A method for preparing Ag-TiO 2 -MMT composite photocatalyst in the technical field of inorganic composite nanomaterials, comprising: preparing a silver-montmorillonite mixed solution, preparing a catalyst stock solution, heating and calcining treatment, and the like. The present invention synthesizes the Ag-TiO 2 -MMT composite photocatalyst through the conventional solvothermal method, the synthesis method is simple and direct, the types of reactants used are few and easy to obtain, the yield is greater than > 80%, the requirements for equipment are low, and the time consumption is less. The reaction temperature is relatively low. The product has good dispersibility in water and can be used directly in water, or it can be made into a film by using the adhesion of montmorillonite, and coated on the surface of a vessel or other utensils for use.

Description

technical field [0001] The present invention relates to a preparation method in the technical field of inorganic composite nanomaterials, specifically a Ag-TiO 2 -The preparation method of MMT composite photocatalyst. Background technique [0002] Surface contamination involves many aspects such as food spoilage, transmission of foodborne diseases, and biofouling of some special materials. The prevention of microbial surface contamination has become very necessary in today's healthcare systems, food industry, and pharmaceutical industries, and thus there is great interest in the development of antimicrobial materials and antimicrobial coatings. Practical antibacterial materials should have the characteristics of strong antibacterial efficacy, long-lasting efficacy, environmental friendliness, low toxicity, and ease of manufacture. Since the 1970s, photocatalysis has been developed and applied to various fields of production and life, especially the use of photocatalysis to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J21/06B01J37/00B01J37/08B01J37/16A01N59/16A01P1/00C02F1/30C02F1/42A61L9/18A61L101/02C02F101/20C02F101/30
Inventor 陈接胜吴同舜王开学李国栋
Owner SHANGHAI JIAOTONG UNIV
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