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yshqsq

银虫 (正式写手)

[交流] 【请教】请教乙酰乙酸乙酯的作用

The Ag/TiO2 powders were similarly prepared using a modified
sol–gel method as described in our previous work [15]. In a typical
synthesis, a 0.2 g solid AgNO3 was dissolved in 20 mL of ethanol,
followed by addition of mixture containing 8 mL of tetra-n-butyl
titanate, 80 mL of ethanol, 4 mL of ethyl acetoacetate. Then 1 mL
distilled water was added by dropwise to the above mixed solution in
the absence of light, the mixed solutionwas successively stirred for 4 h
until a clear and transparent sol was obtained. Subsequently, the sol
was dried at 353 K to get xerogel, which was grinded and calcined at
723 K for 2 h.
请问各位虫子,上边用到的ethyl acetoacetate(乙酰乙酸乙酯)起什么作用?是不是将银离子还原?
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sobergod

金虫 (正式写手)

螯合剂


yshqsq(金币+1,VIP+0):可是银离子变成了银单质(纳米粒子),是什么让它还原的? 8-28 11:34
三乙一般的作用是螯合剂,抑制水解,免得水解过程过快
2楼2009-08-28 11:07:21
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yshqsq

银虫 (正式写手)

引用回帖:
Originally posted by sobergod at 2009-8-28 11:07:
三乙一般的作用是螯合剂,抑制水解,免得水解过程过快

可是银离子变成了银单质(纳米粒子),是什么让它还原的?
3楼2009-08-28 11:34:30
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liuqiying

木虫 (正式写手)

★ ★
wdwsnnu(金币+1,VIP+0): 8-28 14:21
yshqsq(金币+1,VIP+0):谢谢! 8-28 14:40
乙醇和丁胺都可以还原硝酸银
4楼2009-08-28 13:52:36
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