Preparation method of high-catalysis suspension step-grade biological filtering material
A biological filter material and catalytic technology, applied in the field of environmental engineering, can solve problems such as low quantum yield and restrict photocatalytic efficiency, and achieve the effect of degrading pollutants, improving photocatalytic activity, and enhancing the ability of visible light.
Inactive Publication Date: 2019-01-01
江苏新亿源环保科技有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention: Aiming at the problem that the existing titanium dioxide photocatalytic material has a wide gap, light absorption is limited to the ultraviolet region, holes are easy to recombine with electrons, and the quantum yield is not high, which restricts the photocatalytic efficiency. A kind of preparation method of highly catalytic suspension step biological filter material
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[0018] According to the mass ratio of 1:15, silver nitrate was added to deionized water to obtain the solution and stirred and mixed, then according to the mass ratio of 1:15, 5% nitric acid solution was added dropwise to the solution, and then heated at 45-50°C Reaction under heat preservation for 1-2 hours, the mixed solution was obtained and placed in a hydrothermal reaction kettle, after heat preservation reaction at 75-85°C for 20-24 hours, let it stand and cool to room temperature, aged at room temperature for 6-8 hours, and centrifuged And collect the lower precipitate, dry the precipitate at 55-65°C for 6-8 hours, and grind to obtain silver metavanadate powder; according to the mass ratio of 1:5, add titanyl sulfate to deionized water, stir and mix and place in 200 Ultrasonic dispersion at ~300W for 10~15min, collect the dispersion liquid and weigh 45~50 parts of dispersion liquid, 1~2 parts of 15% hydrofluoric acid and 10~15 parts of silver metavanadate powder respecti...
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The invention relates to a preparation method of a high-catalysis suspension step-grade biological filtering material and belongs to the technical field of environmental engineering. According to thetechnical scheme, silver metavanadate and a porous titanium dioxide material are compounded to prepare a filler material; silver metavanadate is added, so that the optical performance of a modified filler material is changed, a photoresponse range is effectively expanded and the photocatalytic activity of a catalysis material is improved; pollutants are effectively degraded; meanwhile, silver metavanadate and the porous titanium dioxide material are compounded and are calcined to prepare filler; porous titanium dioxide formed by calcination is uniformly and densely riveted on the surface of silver metavanadate and a tight coupling interface is formed between the porous titanium dioxide and silver metavanadate, so that a good photoelectron transmission channel is constructed, and photoelectrons are easy to capture and transport; furthermore, the separation efficiency of photoelectron-hole pairs is improved, so that the photocatalytic performance is easy to improve.
Description
technical field [0001] The invention relates to a preparation method of a highly catalytic suspended cascaded biological filter material, which belongs to the technical field of environmental engineering. Background technique [0002] Water pollution is mainly industrial wastewater, agricultural wastewater. Chemical wastewater contains a large amount of organic and inorganic substances harmful to human body. Inorganic pollutants generally refer to various metals, acids, alkalis, inorganic salts, etc.; organic pollutants can be divided into oxygen-consuming organic pollutants and toxic organic pollutants. Aerobic organic pollutants refer to carbohydrates, fats, proteins, etc., which decompose in water and consume a large amount of dissolved oxygen in water, thereby affecting the growth of aquatic organisms. Toxic organic pollutants refer to phenols, polychlorinated pesticides, organic chlorides, polycyclic aromatic hydrocarbons, etc., which can cause physiological damage or...
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IPC IPC(8): C02F3/00C02F3/34B01J23/68B01J35/02B01J35/00
CPCC02F3/00C02F3/34B01J23/682C02F2305/10B01J35/00B01J35/30B01J35/39
Inventor 雷广云高力群
Owner 江苏新亿源环保科技有限公司