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wandong8994

新虫 (小有名气)

[求助] 共沉淀法制备纳米四氧化三铁 已有1人参与

怎么样用共沉淀法制备分散良好的纳米四氧化三铁晶体,另外还想把纳米四氧化三铁负载在膨润土上,应该怎么做才好?
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喜爱化学

金虫 (初入文坛)

【答案】应助回帖

Synthesis of magnetic nanoparticles (Fe 3 O 4 -NP) : Citrate-stabilized
Fe 3 O 4 -NP were synthesized following the Massart precipitation method,
followed by nanoparticles surface functionalization with citric acid. [ 13 ]
Briefl y, 0.86 g FeCl 2 and 2.35 g FeCl 3 were mixed in 40 mL water and
heated to 80 °C under argon in a three-necked fl ask. While vigorously
stirring the reaction mixture, 5 mL of NH 4 OH was introduced by a
syringe and heating was continued for 30 min. Next, 1 g of citric acid
in 2 mL water was introduced and the temperature raised to 95 °C
while stirring was continued for an additional 90 min. Subsequently,
the nanoparticle dispersion was dialyzed against water in a 12–14 kD
cut-off cellulose membrane (Roth, Germany), resulting in a stable
dispersion of negatively charged magnetite nanoparticles. Particle size
and zeta-potential were determined via DLS and electrophoretic mobility
measurements, respectively, using Malvern Nano ZS revealing a mean
particle size of 30 nm and a zeta potential of –25 mV.   AM上的,自己做的,分散性很好,放了一个月也仅有一丁点沉淀
2楼2014-02-23 22:07:19
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kangshisan

捐助贵宾 (职业作家)

引用回帖:
2楼: Originally posted by 喜爱化学 at 2014-02-23 22:07:19
Synthesis of magnetic nanoparticles (Fe 3 O 4 -NP) : Citrate-stabilized
Fe 3 O 4 -NP were synthesized following the Massart precipitation method,
followed by nanoparticles surface functionalization ...

请问你还有这个参考文献吗?能否告诉下这个文献,想看下
By_work,all_things_increase_and_grow.
3楼2017-10-24 21:04:39
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