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jrbao

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[求助] 请教在石英比色皿中进行对硝基苯酚催化还原反应的问题

很多文献在进行对硝基苯酚催化还原反应时,经常使用石英比色皿,请问在石英比色皿中如何搅拌?特别是对于有磁性的催化剂。另外一般在20℃下进行,需要水浴吗?请大家不吝赐教!附一篇文献中的催化性能测试
Catalytic activity towards 4-nitrophenol reduction:To test the
catalytic activity of the NCMSS(Ni@SiO2), the reduction of 4-nitrophenol
by an excess of NaBH4 as the model reaction in water was
chosen. The catalytic redox reaction process was set up in a
standard quartz cuvette with 1 cm path length and 4 mL volume.
Initially, freshly prepared NaBH4 aqueous solution (0.3 mL,
0.2 M) was added to the above quartz cuvette containing
4-nitrophenol (3 mL, 0.1 mM) with stirring at 20 ℃, and the
solution color immediately changed from light yellow to yellow–
green. After stirring for 2 min, a given amount of NCMSS was
added to the above solution. A Shimadzu UV2550 spectrophotometer
over a scanning range of 200–500 nm was employed
to monitor the reaction at 20 ℃. The rate constant of the
reaction was measured by the extinction of the solution at
400 nm as a function of time.
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料峭春风

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【答案】应助回帖

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感谢参与,应助指数 +1
pzypdl: 金币+1, 谢谢回帖交流! 2012-12-14 13:36:30
jrbao: 金币+3, 有帮助 2012-12-14 20:56:19
磁性的比较麻烦,要机械搅拌。20℃现在这个天气是没问题的,不需要水浴
2楼2012-12-14 12:10:11
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jrbao

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2楼: Originally posted by 料峭春风 at 2012-12-14 12:10:11
磁性的比较麻烦,要机械搅拌。20℃现在这个天气是没问题的,不需要水浴

在石英比色皿中能机械搅拌吗?
3楼2012-12-14 20:54:20
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