Preparation method of antibacterial silver molybdate/MIL-101 (Fe, Zn) heterojunction photocatalytic membrane and product and application thereof

A photocatalytic film, silver molybdate technology, applied in catalyst activation/preparation, chemical instruments and methods, botanical equipment and methods, etc., can solve the difficulty of separation and recovery of powder catalysts, poor photocatalytic activity, composite photocatalytic film Membrane surface pollution and other problems, to achieve the effect of promoting interfacial charge transfer, simple preparation process and reducing membrane surface pollution

Active Publication Date: 2020-07-28
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor visible light catalytic activity of silver molybdate photocatalyst, surface pollution of composite photocatalytic membrane, and difficulty in separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An antibacterial silver molybdate / MIL-101 (Fe, Zn) heterojunction photocatalytic film, which has broad-spectrum inorganic antibacterial silver molybdate and bimetallic organic framework compound MIL-101 (Fe, Zn) by electrospinning , Zn) to form a heterojunction to prepare a composite photocatalytic film, which is prepared according to the following steps:

[0032] (1) According to the molar ratio of 1:1:0.7 FeCl 3 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2O and terephthalic acid were dissolved in N,N-dimethylformamide solvent. After the dissolution was complete, the mixed solution was transferred to an ultrasonic-hydrothermal reactor. The reaction temperature was 150°C, the reaction time was 24h and ultrasonic The frequency is 200HZ. After the reaction is completed, centrifugal filtration is performed. Finally, the precipitate is activated in hot water and absolute ethanol for 6 hours. After hot suction filtration, it is roasted in a nitrogen atmosphere tube furnace to obtain MIL-1...

Embodiment 2

[0037] An antibacterial silver molybdate / MIL-101 (Fe, Zn) heterojunction photocatalytic film is prepared according to the following steps:

[0038] (1) According to the molar ratio of 1:1:1 FeCl 3 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O and terephthalic acid were dissolved in N,N-dimethylformamide solvent. After the dissolution was complete, the mixed solution was transferred to an ultrasonic-hydrothermal reactor. The reaction temperature was controlled at 150°C, the reaction time was 24h and ultrasonic The frequency is 200HZ. After the reaction is completed, centrifugal filtration is carried out. Finally, the precipitate is activated in hot water and absolute ethanol for 6 hours. After hot suction filtration, it is roasted in a nitrogen atmosphere tube furnace to obtain MIL-101 (Fe , Zn) catalyst;

[0039] (2) 2 Mix and ball-mill silver molybdate particles with a mass ratio of 0.3:1 and MIL-101 (Fe, Zn) by solid-phase method, disperse them into methanol, reflux at 80°C for 4 hours,...

Embodiment 3

[0043] An antibacterial silver molybdate / MIL-101 (Fe, Zn) heterojunction photocatalytic film is prepared according to the following steps:

[0044] (1) According to the molar ratio of 1:1:0.7 FeCl 3 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O and terephthalic acid were dissolved in N,N-dimethylformamide solvent. After the dissolution was complete, the mixed solution was transferred to an ultrasonic-hydrothermal reactor. The reaction temperature was controlled at 150°C, the reaction time was 24h and ultrasonic The frequency is 200HZ. After the reaction is completed, centrifugal filtration is carried out. Finally, the precipitate is activated in hot water and absolute ethanol for 6 hours. After hot suction filtration, it is roasted in a nitrogen atmosphere tube furnace to obtain MIL-101 (Fe , Zn) catalyst;

[0045] (2) Silver molybdate particles with a mass ratio of 0.5:1 and MIL-101 (Fe, Zn) were mixed and ball-milled by solid-phase method, dispersed into methanol, refluxed at 80°C for 4...

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Abstract

The invention provides a preparation method of an antibacterial silver molybdate/MIL-101 (Fe, Zn) heterojunction photocatalytic membrane and a product and application thereof. According to the preparation method, a heterojunction formed by compounding an inorganic antibacterial agent silver molybdate with broad-spectrum property and a bimetal organic framework compound MIL-101 (FE, Zn) is preparedinto the composite photocatalytic membrane by adopting an electrostatic spinning method. The product and use thereof are disclosed. The large specific surface area and rich active sites of MIL-100 (Fe) are fully utilized, interface charge transfer is effectively promoted, the separation capacity of photo-induced electrons and holes is improved, and adsorption and photocatalytic degradation removal of organic pollutants on the surface of the catalyst are promoted. Meanwhile, the surface of the silver molybdate is excited by illumination to generate superoxide free radicals and hydroxyl free radicals, so that the purposes of sterilization and bacteriostasis are achieved, the water treatment efficiency is effectively improved, the membrane pollution is reduced, the double-effect purificationof water quality is realized, the application prospect is relatively great, and a feasible scheme is provided for water pollution treatment.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial silver molybdate / MIL-101 (Fe, Zn) heterojunction photocatalytic film and its product and application, which can effectively promote the heterojunction of silver molybdate / MIL-101 (Fe, Zn) The photocatalytic degradation and removal of organic pollutants in water by the textured photocatalytic membrane, and the use of silver molybdate for sterilization and antibacterial can effectively reduce the pollution of the membrane surface, and is used in the field of water pollution treatment. Background technique [0002] Metal-organic framework materials (MOFs) are a new type of porous materials that are superior to traditional materials. They not only have large specific surface area, high porosity, but also have the characteristics of adjustable skeleton structure and pore size, and there are many uncoordinated and uncoordinated structures in MOFs. Saturated active sites, with photocatalytic ac...

Claims

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Application Information

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IPC IPC(8): B01J35/06B01J31/22B01J37/34A01N59/16A01P1/00C02F1/30C02F101/30C02F101/36C02F101/38
CPCA01N59/16B01J35/065B01J31/1691B01J31/2239B01J35/004B01J37/0036B01J37/342C02F1/30C02F2101/30C02F2101/36C02F2101/38C02F2305/10B01J2531/842B01J2531/26Y02W10/37
Inventor 崔大祥童琴赵昆峰蔡婷袁静金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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