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应助: 0 (幼儿园)
金币: 580.3
帖子: 371
在线: 82.7小时
虫号: 249170
注册: 2006-05-06
性别: GG
专业: 无机合成和制备化学

[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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