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875418128金蟲 (著名寫手)
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[求助]
二氧化鈦如何負(fù)載在二氧化硅上
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| 二氧化鈦如何負(fù)載在二氧化硅上,最好有具體文獻(xiàn)或操作步驟,謝謝給位蟲友啦! |
晶面控制 |

榮譽(yù)版主 (文學(xué)泰斗)
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網(wǎng)上例子舉不勝舉,現(xiàn)給出兩例,望樓主有所啟發(fā)并能夠自查文獻(xiàn): 【文獻(xiàn)一】 (1)To obtain the supported TiO2/SiO2 materials, a solution with the required amount of titanium tetraisopropoxide (TTIP) in isopropanol (TTIP:i-PrOH weight ratio = 1:8) to get 20, 40 and 60 TiO2 wt% loading was added to each silica support. (2)After stirring the mixture for 45 minutes at room temperature, water was added until a molar ratio 160 H2O:TTIP was reached. The stirring was then continued for other 45 minutes. (3)The mixture was centrifuged and the recovered solid was dried at 110 ºC overnight and calcined at 550 ºC for crystallisation. 【文獻(xiàn)二】 (1) Silica is suspended in deionized water, to which an appropriate amount of TiC13 (Merck, 15% HCl solution) is added while the suspension is vigorously stirred ensuring a good homogeneity during the precipitation. (2)Then, the suspension is neutralized up to pH ca. 7 by slow addition of ammonium solution. (3)The precipitate is filtered and washed with deionized water several times. (4)Then, it is dried at 373 K for 12 h and calcined at 773 K in air for 12 h. This procedure allows the deposition of hydrated Ti(III) oxide which yields dispersed TiO2 species on the silica surface after thermal treatment. |
榮譽(yù)版主 (文學(xué)泰斗)
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