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zhang_hua

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[交流] 【求助】撒金求助，如何以硅酸鈉或TEOS為硅源制備純硅MCM41？？？急用�。�！

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 ]

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1樓 2011-02-26 13:20:58

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chm_zhangwm

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這是用TEOS的方法

zhang_hua(金幣+1): 2011-03-22 13:55:23

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Originally posted by zhang_hua at 2011-02-26 13:20:58:
偶是新手，請(qǐng)各位高手多多指點(diǎn)�。�！急用�。�

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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3樓2011-02-26 23:48:12

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chm_zhangwm

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怎么純！

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zhang_hua(金幣+1):謝謝參與

引用回帖:

Originally posted by zhang_hua at 2011-02-26 13:20:58:
偶是新手，請(qǐng)各位高手多多指點(diǎn)�。。〖庇茫�！

MCM-41怎么會(huì)是純的SiO2，制備的時(shí)候要加模板劑，一般用季銨鹽類(lèi)做模板，如CTAB，用量比較考究，需要摸索摸索。
用TEOS在酸或堿催化下，合適的醇水比，一定量的CTAB，水解。

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2樓2011-02-26 23:42:50

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chm_zhangwm

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這是用硅酸鈉的方法

zhang_hua(金幣+1): 2011-03-22 13:55:29

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Originally posted by zhang_hua at 2011-02-26 13:20:58:
偶是新手，請(qǐng)各位高手多多指點(diǎn)�。�！急用��！

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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4樓2011-02-26 23:50:08

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hanyang955

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zhang_hua(金幣+1): 謝謝參與

你可以找找陳長(zhǎng)鑫“MCM-41分子篩的合成與表征”，不過(guò)文獻(xiàn)有點(diǎn)老2002的
我試驗(yàn)過(guò)效果不錯(cuò)。

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5樓2012-06-11 11:05:59

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