Solid-phase photocatalyst utilizing visible light and its preparing method

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as high power consumption, reduce operating costs, avoid The effect of secondary pollution

Inactive Publication Date: 2006-08-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the light absorption regions of isopolyacids and heteropolyacids are mainly in the ultraviolet region, and only ultraviolet light with a wavelength of less than 350nm can effectively excite the vibration υ (M=O) of metal atoms and terminal oxygen, while ultraviolet light in Sunlight only accounts for 3-5%. If artificial ultraviolet light source is used, a large amount of electric energy will be consumed. Therefore, it is extremely important for environmental protection and energy saving to try to treat wastewater with cheap and low-cost visible light or sunlight. significance

Method used

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  • Solid-phase photocatalyst utilizing visible light and its preparing method
  • Solid-phase photocatalyst utilizing visible light and its preparing method
  • Solid-phase photocatalyst utilizing visible light and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Get 1.0 g of strong anion-exchange resin (Amberlite IRA 900 type of Aldrich Reagent Company of the United States) with styrene / divinylbenzene having a selected particle size of 0.05 to 0.45 microns as a copolymer, in 50 milliliters of 0.5 M Magnetically stirred in aqueous HCl solution for 30 minutes, filtered, electromagnetically stirred in 50 ml of 0.5 M NaOH aqueous solution for 30 minutes, and washed with 500 ml of deionized water. Filter out the treated resin, add it to a glass container, add 20 ml of deionized water, slowly add 61.2 ml of 1×10 -4 M's phosphomolybdic acid (H 3 PMo 12 o 40 ) aqueous solution, and with 0.1M HClO 4 Adjust the pH to 3.90, and carry out loading bonding under electromagnetic stirring. Stir for 48 hours, then stop stirring. Rinse with deionized water until no phosphomolybdate ions are detected in the solution, then centrifuge, and dry in vacuum at a low temperature of 10°C for 36 hours to obtain a supported catalyst.

Embodiment 2

[0050] Get 1.0 g of polystyrene-type strong anion-exchange resin (Nankai University Chemical Plant, D201 type) with a selected particle size of 0.5 to 1.8 microns, and electromagnetically stir it in 50 milliliters of 0.5 M HCl aqueous solution for 30 Minutes, after filtration, electromagnetically stirred in 50 ml of 0.5 M NaOH aqueous solution for 30 min, and washed with 500 ml of deionized water. Filter out the treated resin, add it to a glass container, add 20 ml of deionized water, slowly add 58.4 ml of 1×10 -2 Sodium phosphotungstate (Na 3 PW 12 o 40 ) aqueous solution, and with 0.1M HClO 4 Adjust the pH to 4.60, and carry out loading bonding under electromagnetic stirring. Stir for 48 hours, then stop stirring. Rinse with deionized water until no phosphotungstate ions can be detected in the solution, then centrifuge, and vacuum dry at 50°C for 36 hours to obtain the supported catalyst.

Embodiment 3

[0052]Take 1.0 g of styrene / divinylbenzene with a selected particle size of 30 to 200 microns as a copolymer of weak anion exchange resins with amino groups (Anhui Samsung Company, D301 type), in 50 milliliters of 0.5 M HCl aqueous solution Electromagnetic stirring was carried out for 30 minutes, and after filtration, electromagnetic stirring was carried out in 50 ml of 0.5 M NaOH aqueous solution for 30 minutes, and washed with 500 ml of deionized water. Filter out the treated resin, add it to a glass container, add 20 ml of deionized water, slowly add 50 ml of 1×10 -3 Lithium silicotungstate (Li 4 SiW 12 o 40 ) aqueous solution, and with 0.1M HClO 4 Adjust the pH to 4.60, and carry out loading bonding under electromagnetic stirring. Stir for 48 hours, then stop stirring. Rinse with deionized water until no silicotungstate ions are detected in the solution, then centrifuge and dry in vacuum at 40°C for 36 hours to obtain the supported catalyst.

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Abstract

This invention belongs to solid phase catalyst field, especially relates to solid phase catalyst consisted by carrier and yang collaterals transition metal compound with photocatalysis activity. The catalyst is consisted by negative ion exchange resin and yang collaterals transition metal compound, they linkage with each other and there quality ratio is 1:0.01-1.5. The compound is isopoly acid, heteropoly acid or tertiary heteropoly acid, and they all have light activity. The catalyst can use visible light activate H2O2 to clear and process the organic fuel pollutant in dye printing industrial waste water.

Description

technical field [0001] The invention belongs to the field of solid-phase photocatalysts, in particular to a solid-phase photocatalyst composed of a carrier and an oxygen complex transition metal compound with photocatalytic activity and a preparation method thereof. Background technique [0002] As we all know, with the development of industry, the problem of environmental pollution has become very serious. According to statistics, nearly half of the rivers in my country are polluted by toxic organic substances, 160 million people drink water with serious organic pollution, and many cities have serious air pollution. Among these pollutants, some dye pollutants contained in the wastewater discharged by the printing and dyeing industry are highly toxic, and cannot be treated with existing microbial technology, or cannot be completely removed, and the harm to the natural environment is particularly prominent. [0003] In recent years, the application of photocatalytic technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/08B01J23/00B01J27/14C02F1/30
CPCY02W10/37
Inventor 赵进才雷鹏翔马万红陈春城
Owner INST OF CHEM CHINESE ACAD OF SCI
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