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【求助】撒金求助,如何以硅酸鈉或TEOS為硅源制備純硅MCM41???急用。!
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偶是新手,請(qǐng)各位高手多多指點(diǎn)。!急用!如果能給出好的相關(guān)文獻(xiàn)我一定會(huì)打撒金幣的!。! [ Last edited by zhang_hua on 2011-2-28 at 10:20 ] |
核殼納米材料 (Core Shell Nanostructures) |
» 搶金幣啦!回帖就可以得到:
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0.8 g of CTMABr were dissolved in 42.8 mL of a solution of sodium hydroxide 0.1 M at 40 C. After complete dissolution, 3.81 g of TEOS were added to the mixture. The starting molar ratio was 1.0TEOS:0.12CTMABr: 0.23NaOH:130H2O. An immediate precipitation was observed and the mixture was stirred for 3 days at room temperature. After reaction, the solid was recovered by filtration, washed with distilled water, and dried at 70C overnight. |
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17.24 g of CTMABr were dissolved in 350 g of distilled water at 40 C. Meanwhile, 52.5 g of sodium silicate were mixed with 54.5 g of water. The starting molar ratio was 1.0SiO2:0.4Na2O:0.2CTMABr:135H2O. These two solutions were mixed. Then, 140 mL of hydrochloric acid 1 M were added into the stirred solution until pH = 8.5; a precipitation occurring at about pH = 11.5. The mixture was further stirred at room temperature for 2 h, introduced in a polypropylene flask and heated at 90C for 24 h. |
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