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Photocatalyzing magnetic float microbead and its preparing process

A technology of photocatalysis and photocatalytic film, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of difficult recovery of floating beads and deactivated catalysts, and difficult recovery of floating beads. Achieve the effect of avoiding secondary pollution and fast magnetic effect

Inactive Publication Date: 2003-12-17
WUHAN UNIV OF TECH
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Problems solved by technology

However, there is a difficult problem in the research and application of floating photocatalysts in various countries in the early stage. It is difficult to recover the floating beads and deactivated catalysts floating on the surface of water bodies, especially after releasing petroleum pollutants on the surface of vast lakes and oceans. Difficult to recycle floating beads

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Wash and dry the waste glass, crush it into 30-250 micron (80-360 mesh / inch) fine powder, press 90% glass powder, 10% (weight ratio) nano-particle magnetic material (nickel, zinc-iron), Fe 3 o 4 Mix the ingredients of nanomaterials evenly, place them in a high-temperature furnace to heat, quickly raise the temperature to 850-1200°C and keep it for 2 hours, take it out of the furnace and cool it quickly, and then obtain magnetic glass polycrystals, and crush the polycrystals into 200-30 microns (80 ~360 mesh / inch) for standby.

[0019] The polycrystalline powder is loaded into the powder feeder of the oxygen-acetylene flame spraying gun, and the temperature of the muzzle is adjusted to 1000-1300°C. According to the conventional powder spraying process, the polycrystalline powder is quickly passed through the high-temperature nozzle of the spraying flame, and directly enters the cooling circulation pool Inside, the floating magnetic beads are hollow magnetic beads, and t...

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Abstract

A photocatalyst in the form of magnetic float microbead for photocatalytic degradation of the pollutant flaating on water surface (such as petroleum, oil, organic matter, etc.) is prepared through mixing nanometre Ni or Zn ferrite and the general glass powder, congruent melting to make up polycrystalline complex, after pulverizing, spraying it in cold water by oxyacetylene flame sprayer to obtain hollow magentic glass microbeads floating on water, compounding photocatalytic TiO2 film on the surface of micro bead, and holding temp at 500-550 deg.C for 2-3 hr. After used, the said catalyst can be recovered magnetically to prevent secondary pollution.

Description

technical field [0001] The invention relates to a hollow magnetic glass microbead carrier made by mixing magnetic materials and general glass frit, loaded with composite TiO 2 Photocatalyst properties and preparation of photocatalytic films. [0002] In particular, it relates to glass microspheres with magnetic and hollow floating photocatalytic degradation functions and a preparation process thereof. Background technique [0003] TiO 2 As the main photocatalyst for photocatalytic degradation of organic pollutants, and has excellent performance in catalytic degradation of organic pollution, it has attracted the attention of the world and focused on research and development. [0004] The suspension system medical stone magnetic nano photocatalyst that we have developed has the characteristics of convenient recovery and excellent performance, and plays a great role in the suspension system photocatalytic treatment of water organic pollution. Since the 1990s, international c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J37/00
Inventor 董学斌万章国刘卫东杨家宽赵国荣周健梅柄初熊先立陈家银甘维国刘启文肖波柴欣
Owner WUHAN UNIV OF TECH
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