Photocatalyst material being activated by visible light, raw material for the same and method for producing the same
A photocatalyst and manufacturing method technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as high raw material price, insufficient reaction speed and insufficient reaction in the visible light region
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Embodiment 1
[0088] 1000 g of titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.: ST01) and 375 g of urea (Wako Pure Chemical Industries, Ltd.) were put into a stainless steel container, and heat-treated at 450° C. for 120 minutes while stirring and mixing. Thus, visible-light-responsive titanium oxynitride having a yellow color was produced. 10 g of this titanium oxynitride powder and 90 g of ion-exchanged water were mixed to produce a slurry with a solid content concentration of 10%. Then use a mechanical disperser to make a low-settling slurry.
[0089] On the other hand, copper (II) nitrate hydrate was dissolved in ion-exchanged water to prepare an aqueous solution of a metal salt having a copper concentration of 5%.
[0090] Then, 100 g of the slurry of titanium oxide and 1 g of the aqueous solution of copper nitrate were mixed and stirred for 1 hour to produce a mixed solution of the photocatalyst body and the metal compound. The mixed concentration of copper at this time wa...
Embodiment 2
[0094] 250 g of titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.: ST01) was placed in a quartz container, and heat-treated at 600° C. for 180 minutes while flowing ammonia gas into the container at a flow rate of 1000 sccm. Thus, visible light-responsive titanium oxynitride having a yellow color was produced. The powder thereof was subjected to XPS measurement without being corroded, and a peak derived from an N—Ti bond was observed around 396 eV. 10 g of this titanium oxynitride powder was mixed with 90 g of ion-exchanged water to produce a slurry with a solid content concentration of 10%. Further, a mechanical disperser was used to prepare a low-settling slurry.
[0095] On the other hand, iron (III) nitrate hydrate was dissolved in ion-exchanged water to prepare an aqueous solution of a metal salt having an iron concentration of 5%.
[0096] Then, 100 g of the slurry of titanium oxynitride and 1 g of the aqueous solution of iron nitrate were mixed and stirred for...
Embodiment 3
[0100] A solution in which acetonitrile and titanium tetraisopropoxide were mixed and dissolved in a molar ratio of 20 / 1 was produced. For this solution, hydrogen sulfide (H 2 S) Gas, for bubbling. After the solution turned black, the bubbling was continued for another 3 hours, and the supply of hydrogen sulfide gas was stopped. Then, the solution was filtered under reduced pressure to obtain a black precipitate.
[0101]Furthermore, the precipitate was re-dispersed in ethanol, and then filtered. After repeating the redispersion of ethanol and filtration three times, it was washed and air-dried to obtain a precursor powder. The precursor powder was heat-treated at 400° C. for 6 hours in humid air. Thus, anatase-type titanium oxynitride powder was obtained. This powder was subjected to XPS measurement without being corroded, and a peak derived from an S—Ti bond was observed around 160 eV. Next, 12 g of the obtained titanium oxynitride powder was mixed with 80 cc of ion-ex...
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