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papawa

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[交流] 【请教】酸化碳纳米管表面羧基含量的测定

请教各位大侠怎么测定酸化碳纳米管表面的羧基含量，感激不尽！

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1楼 2010-11-15 14:08:00

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

feifei2890

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papawa(金币+2): 2010-11-19 22:58:26

引用回帖:

Originally posted by papawa at 2010-11-18 19:28:09:

请问能给一些具体的步骤吗？

这个一般的活性炭的文献上面都有，The titration was conducted by adding 200mg of adsorbents into a 200 ml flask containing 100 ml of the following
0.1 mol/L solutions: NaHCO3, Na2CO3, NaOH, and HCl. The flask was
sealed and shaken at 298K for 2 days, and then filtered through a
0.45mm nylon fiber filter. The filtrate (10 ml) was pipetted and
mixed with 15 ml of 0.1 mol/L HCl or NaOH. The excess of acid and
base was titrated with 0.1 mol/L NaOH and HCl, respectively. The
quantities of acidity of various types were determined from the
assumption that NaHCO3 reacts with carboxylic groups, Na2CO3
reacts with carboxylic and lactonic groups, and NaOH reacts with
carboxylic, lactonic and phenolic groups. The total basicity was
determined from the amount of HCl reacted with the adsorbents.我随便找的一个文献《Kinetics and thermodynamics of adsorption of ionizable aromatic compounds from aqueous solutions by as-prepared and oxidized multiwalled carbon nanotubes》上面的步骤。