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jlmengfang

新虫

[求助] Eu2O3配制Eu(NO3)3 怎么配 已有1人参与

小虫做实验要用到Eu(NO3)3  ,但实验室没有 ,所以用Eu2O3配制。
请问是直接加硝酸吗。硝酸的浓度是多少?
我要配制0.0025mol Eu(NO3)3,需要Eu2O3多少g?我算的是0.44g。但实验总做不出产物
加硝酸多少呢 我用的是65%的浓硝酸,密度1.4g/ml 我算是约0.52ml 对吗?
请好心人再帮我算一下,看是否是我算的有误?配制的是否正确。谢谢
另 Eu的式量 152
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yantingfang

金虫 (初入文坛)

【答案】应助回帖

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jlmengfang: 金币+2, ★★★★★最佳答案 2014-05-23 17:53:37
The LaF3: xmol% Eu3+(x¼1, 3, 5, 8, 10) nanoparticles were
prepared by using a modified literature procedure.3In a typical
experiment, 0.65 mmol of La2O3and stoichiometric Eu2O3were
dissolved in concentrated HNO3firstly by stirring at about 90C,
and then 2 ml of methanol was added to form a transparent RE
nitrate methanol solution. An aqueous solution of 10.4 mmol of
citric acid in 35 ml of deionized water was partially neutralized
with 1.5 ml of concentrated NH4OH to a pH of 5.5.
参考文献:Enhanced emission of ultra-small-sized LaF3:RE3+(RE=Eu, Tb)nanoparticles through 1,2,4,5-benzenetetracarboxylic acid sensitization
文献地址:http://pubs.rsc.org/en/content/articlehtml/2012/nr/c2nr31206a
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2楼2014-05-23 16:26:46
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