A kind of preparation method of titanium dioxide
A technology of titanium dioxide and heavy metal oxides, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problem of unsatisfactory intensity and efficiency, visible light and infrared light utilization efficiency It is not ideal enough to achieve high luminous transition radiation intensity and efficiency, improve photocatalytic performance, and reduce the effect of recombination rate.
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[0030] The invention provides a preparation method of titanium dioxide: preparing composite titanium dioxide powder according to the mass ratio of industrial titanium dioxide: heavy metal oxide glass powder = (40-60): (40-60) and mixing the composite titanium dioxide powder uniform; wherein, the raw materials of the heavy metal oxide glass powder include heavy metal oxides and a fluorescent sensitizer whose mass is 1-2% of the total mass of the heavy metal oxides.
[0031] The particle size of industrial titanium dioxide is on the order of nanometers (usually less than 200nm), while heavy metal oxide glass powder is a powder obtained by crushing and grinding glass materials, and its particle size is on the order of microns (the specific particle size of heavy metal oxide glass powder can be adjusted through the grinding process and time), preferably, the particle size of the heavy metal oxide glass powder is 100-150 microns. as attached figure 1 As shown, the inner structure ...
Embodiment 1
[0055] Weigh the glass powder raw material according to the mass ratio of lead oxide: boron oxide: vanadium pentoxide: germanium oxide: tellurium oxide = 10:10:10:25:45, and add 1% of the total mass of the above five oxides. Terbium oxide and ytterbium oxide whose mass is 1% of the total mass of the above five oxides are ground and mixed uniformly; the glass powder raw material is put into a platinum crucible, and sent into a preheated muffle furnace, and heated at a temperature of 850°C Melt for 2 hours to obtain molten glass; pour the molten glass into an aluminum plate mold for molding, and send it to another preheated muffle furnace for annealing at 240°C for 2 hours to obtain a clear glass body; close the muffle The power supply of the furnace is used to cool the clarified glass body to room temperature with the furnace. The clarified glass body is pulverized and ground to obtain heavy metal oxide glass powder with a particle size of about 100-150 microns. Prepare compos...
Embodiment 2
[0057] Weigh the glass powder raw material according to the mass ratio of lead oxide: boron oxide: vanadium pentoxide: germanium oxide: tellurium oxide = 12:12:12:22:42, and the added mass is 1% of the total mass of the above five oxides. Praseodymium oxide and ytterbium oxide with a mass of 1% of the total mass of the above five oxides are ground and mixed uniformly; the glass powder raw material is put into a platinum crucible, and sent into a preheated muffle furnace, and heated at a temperature of 650°C Melt for 4 hours to obtain molten glass; pour the molten glass into an aluminum plate mold for molding, and send it to another preheated muffle furnace for annealing at 220°C for 1 hour to obtain a clear glass body; close the muffle The power supply of the furnace is used to cool the clarified glass body to room temperature with the furnace. The clarified glass body is pulverized and ground to obtain heavy metal oxide glass powder with a particle size of about 100-150 micro...
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