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Production of visible light composite catalyst for high-efficient decontamination antibacterial

A composite catalyst and visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficult control, complicated synthesis steps, and inability to control the amount of nitrogen doping

Inactive Publication Date: 2006-03-15
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

None of these methods can control the amount of nitrogen doping
Recently Clemens Burda reported nitrogen doping by amination of triethylamine, but the synthesis steps are complicated and difficult to control

Method used

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  • Production of visible light composite catalyst for high-efficient decontamination antibacterial
  • Production of visible light composite catalyst for high-efficient decontamination antibacterial
  • Production of visible light composite catalyst for high-efficient decontamination antibacterial

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Embodiment Construction

[0011] The technical characteristics and advantages of the present invention can be seen through the embodiments and application examples given below.

[0012] 1. Nitrogen-doped composite photocatalyst TiO 2-x N x / SiO 2 The optical absorption characteristic of photocatalyst tetrabutyl titanate and the volume ratio of hexanaphthene are 1: 3, then add ethylenediamine, make the molar ratio of nitrogen and oxygen in titanium oxide be respectively 8%, dry porous silica gel Immerse in the above organic solution and react for 15 hours, then evaporate the cyclohexane at 40°C, dry the sample at 100°C, calcinate in the furnace at 400°C for 8 hours, and then cool naturally in the furnace to room temperature to obtain deep Yellow material, the catalyst was characterized by UV-Vis diffuse reflectance spectroscopy, proving that TiO 2-x o x / SiO 2 There is absorption in the visible light region (400-600nm) ( figure 1 ).

[0013] 2. TiO2 2-x o x / SiO 2 Photocatalytic Activity for P...

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Abstract

A process for preparing N doped visual-light TiO2-xOx / SiO2 photo catalyst for killing bacteria and removing pollutant includes such steps as immersing the dried porous silicon gel in the cyclohexane solution of tetrabutyl titanate and ethyldiamine, reacting for 10-20 hr, evaporating cyclohexane at the temp lower than 50 Deg C, drying, calcining at 350-500 Deg C. for 4-8 hrs, and natural cooling.

Description

technical field [0001] The present invention relates to a kind of preparation method of photocatalyst, relate to a kind of TiO2 2-x N x / SiO 2 Preparation method of visible light composite catalyst. Background technique: [0002] Effective use of solar energy is one of the main goals of modern scientific research and engineering, and it will have a great impact on the application of technology. For the practical application of photocatalysis, many materials have been developed, and titanium oxide is the most promising material due to its high efficiency, low cost, chemical stability and photostability. A large number of studies have proved that it has dual effects of sterilization and removal of organic pollutants. However, the wide band gap (3.2eV) of titanium oxide can only reflect its dual effect under ultraviolet light. Only 8% of the solar energy is applied, so any extended TiO 2 It is possible to improve the photocatalytic efficiency of titanium oxide by absorbin...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 胡春胡学香兰永清郝郑平
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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