Magnetic composite photocatalyst, preparation method and special system and method

A photocatalyst and composite technology, applied in chemical instruments and methods, physical/chemical process catalysts, water treatment parameter control, etc., can solve problems such as low efficiency, high cost, secondary pollution, etc., and achieve improved separation efficiency, iron Effect of magnetic enhancement and strong oxidation effect

Pending Publication Date: 2021-11-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods face the problems of high cost, low efficiency and secondary pollution in the face of pharmaceutical intermediate wastewater with complex water quality

Method used

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  • Magnetic composite photocatalyst, preparation method and special system and method
  • Magnetic composite photocatalyst, preparation method and special system and method
  • Magnetic composite photocatalyst, preparation method and special system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the special system for magnetic composite photocatalyst treatment of pharmaceutical intermediate wastewater includes a pH adjustment module, a photocatalytic reaction module, and a desalination module. Each module is connected by a pipeline, and a filter is installed in the pipeline. Wherein, the pH adjustment module includes a pH adjustment tank 1, an acid-base liquid storage tank 3 and a first metering pump 6. The pH adjustment tank 1 is provided with a pH sensor 2 at the top, and a first stirring paddle 28 is provided at the bottom, and the acid-base liquid storage tank 3 is divided into an acid solution area and an alkali solution area. An acid solution valve 4 is provided at the bottom of the acid solution area, and a lye solution valve 5 is provided in the lye solution area. The acid solution valve 4 and the lye solution valve 5 are adjusted with the pH by the first metering pump 6 Tank 1 is connected. The photocatalytic reaction module...

Embodiment 2

[0049] (1) Bi 5 Fe 0.9 Ni 0.1 Ti 2.7 co 0.3 o 15 preparation of

[0050] Weigh 3.64g of bismuth nitrate, 0.55g of iron nitrate, 0.05g of nickel nitrate, 0.13g of cobalt nitrate and 1.38g of tetrabutyl titanate in 20mL 4mol / L of In dilute nitric acid, stir magnetically for 0.5 h until the mixture is completely dissolved to obtain a mixed solution. Add 65mL of 1.4mol / L triethylenediamine solution dropwise into the mixed solution until the pH of the mixed solution reaches about 8, continue stirring for 1h to obtain liquid A, dissolve 1g of cetyltrimethylammonium bromide in 5mL of water to obtain Liquid B. Mix liquid A and liquid B under magnetic stirring for 1 h to obtain a cloudy liquid. This cloudy solution was transferred to a Teflon-lined autoclave to 80% of the autoclave volume. Continue to carry out thermal reaction in the blast drying oven, the reaction temperature is 180°C, and the reaction time is 48h. After the reaction, the precipitate was centrifuged, washed...

Embodiment 3

[0056] (1) Bi 5 Fe 0.5 Ni 0.5 Ti 2.1 co 0.9 o 15 preparation of

[0057] Weigh 3.4g of bismuth nitrate, 0.28g of iron nitrate, 0.21g of nickel nitrate, 0.37g of cobalt nitrate and 1g of tetrabutyl titanate in 20mL of 4mol / L diluted In nitric acid, stir magnetically for 0.5 h until the mixture is completely dissolved. Add 74mL of 1.6mol / L tetramethylammonium hydroxide solution dropwise into the mixed solution until the pH of the solution reaches about 8, continue stirring for 1h to obtain liquid A, and dissolve 5.25g of polyvinyl alcohol in 5mL of water to obtain liquid B. Mix liquid A and liquid B under magnetic stirring for 0.75 h to obtain a cloudy liquid. This cloudy solution was transferred to a Teflon-lined autoclave to 80% of the autoclave volume. Continue to carry out thermal reaction in the blast drying oven, the reaction temperature is 220°C, and the reaction time is 24h. After the reaction, the precipitate was centrifuged, washed three times with water, wash...

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Abstract

The invention discloses a magnetic composite catalyst, a preparation method and a special system and method, the magnetic compositephotocatalyst is Bi5Fe1-xNixTi3-yCoyO15 / S-g-C3N4, x is 0.1-0.5, and y is 0.3-0.9. The preparation method comprises the following steps: doping Ni at a Fe site and doping Co at a Ti site in Bi5FeTi3O15 to obtain Bi5Fe1-xNixTi3-yCoyO15, and compounding the Bi5Fe1-xNixTi3-yCoyO15 with S-doped g-C3N4 to obtain the magnetic composite photocatalyst which is high in catalytic efficiency and visible light utilization rate and can be repeatedly recycled. According to the magnetic composite catalyst and the matched special treatment system, visible light is fully utilized for inducing to generate strong oxidizing free radicals so as to effectively degrade pollutants in medical intermediate wastewater, salt in the medical intermediate wastewater is recycled, loss in the material transfer process is avoided by utilizing ferromagnetism of the catalyst, and the treatment process is clean, energy-saving and free of secondary pollution.

Description

technical field [0001] The invention relates to a magnetic photocatalyst, a preparation method and a special system and method, in particular to a composite photocatalyst with high catalytic efficiency, high utilization rate of visible light, recyclable and used for degrading pharmaceutical intermediate wastewater, a preparation method and Specialized Apparatus and Methods. Background technique [0002] Pharmaceutical intermediates are some chemical raw materials or chemical products used in the process of drug synthesis. They are key raw materials for the production of chemical raw materials. As an important part of fine chemical industry, pharmaceutical intermediates have gradually become the focus and core of the development of chemical industry in various countries. my country's pharmaceutical intermediate industry has formed a relatively complete system from research and development to production and sales. In the future, my country's pharmaceutical intermediate market ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F9/06C02F101/30C02F101/32C02F101/34C02F101/36C02F101/38C02F103/36
CPCB01J27/24C02F1/30C02F1/725C02F9/00C02F1/66C02F1/4693C02F2101/322C02F2101/38C02F2101/345C02F2101/36C02F2101/30C02F2209/08C02F2305/10C02F2103/36B01J35/33B01J35/39Y02W10/37
Inventor 吴敏汪俊
Owner SOUTHEAST UNIV
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