公开(公告)号：US08409544B2

公开(公告)日：2013-04-02

申请号：US13142167

申请日：2008-12-31

申请人： Mingli Peng ,  Caiquan Zhang ,  Yali Cui ,  Chao Chen ,  Jinghui Zeng

发明人： Mingli Peng ,  Caiquan Zhang ,  Yali Cui ,  Chao Chen ,  Jinghui Zeng

IPC分类号： C01G49/02

CPC分类号： H01F1/0045 ,  B82Y25/00 ,  B82Y30/00 ,  C01G49/08 ,  C01P2004/32 ,  C01P2004/64 ,  C01P2006/42

摘要： Disclosed is a process of preparing magnetite nanoparticles, comprising the following steps: 1) preparing a ferric salt mixed system, wherein a soluble ferric salt is dissolved in glycol at ambient temperature, and then urea and polyethylene glycol are added and mixed homogeneously to obtain the trivalent iron salt mixed system, the mass ratio of glycol to the trivalent iron salt being 15:1 to 60:1, glycol to urea being 20:1 to 100:1, and glycol to polyethylene glycol being 20:1 to 100:1; 2) reacting, wherein the trivalent iron salt mixed system is transferred into a reaction autoclave, sealed and placed into a heating device to react at a temperature of 200 to 300° C. for 8 to 72 hours; and 3) washing, wherein after the reaction system is naturally cooled down to ambient temperature, the product is taken out, and washed with anhydrous ethanol and water in turn to obtain the magnetite nanoparticles. The soluble iron salt includes ferric chloride, ferric sulfate, ferric acetate and ferric nitrate. The obtained nanospheres exhibit a uniform distribution of the particle diameter with a good dispersity in water. The nanospheres have superparamagnetism, and their particle diameter can be controlled by varying the reaction time as desired.

摘要翻译： 公开了一种制备磁铁矿纳米颗粒的方法，包括以下步骤：1）制备铁盐混合体系，其中可溶性铁盐在环境温度下溶于二醇，然后加入尿素和聚乙二醇并均匀混合，得到 三价铁盐混合体系，二醇与三价铁盐的质量比为15:1至60:1，二醇与尿素的比例为20:1至100:1，二醇与聚乙二醇的比例为20:1至100:1 ; 2）反应，其中将三价铁盐混合体系转移到反应釜中，密封并置于加热装置中，在200-300℃的温度下反应8至72小时; 和3）洗涤，其中在反应体系自然冷却至环境温度后，取出产物，依次用无水乙醇和水洗涤，得到磁铁矿纳米颗粒。 可溶性铁盐包括氯化铁，硫酸铁，醋酸铁和硝酸铁。 得到的纳米球表现出均匀的粒径分布，在水中具有良好的分散性。 纳米球具有超顺磁性，并且可通过根据需要改变反应时间来控制它们的粒径。

公开(公告)号：US20110318261A1

公开(公告)日：2011-12-29

申请号：US13142167

申请日：2008-12-31

申请人： Mingli Peng ,  Caiquan Zhang ,  Yali Cui ,  Chao Chen ,  Jinghui Zeng

发明人： Mingli Peng ,  Caiquan Zhang ,  Yali Cui ,  Chao Chen ,  Jinghui Zeng

IPC分类号： C01G49/08 ,  B82Y40/00

CPC分类号： H01F1/0045 ,  B82Y25/00 ,  B82Y30/00 ,  C01G49/08 ,  C01P2004/32 ,  C01P2004/64 ,  C01P2006/42

摘要： Disclosed is a process of preparing magnetite nanoparticles, comprising the following steps: 1) preparing a ferric salt mixed system, wherein a soluble ferric salt is dissolved in glycol at ambient temperature, and then urea and polyethylene glycol are added and mixed homogeneously to obtain the trivalent iron salt mixed system, the mass ratio of glycol to the trivalent iron salt being 15:1 to 60:1, glycol to urea being 20:1 to 100:1, and glycol to polyethylene glycol being 20:1 to 100:1; 2) reacting, wherein the trivalent iron salt mixed system is transferred into a reaction autoclave, sealed and placed into a heating device to react at a temperature of 200 to 300° C. for 8 to 72 hours; and 3) washing, wherein after the reaction system is naturally cooled down to ambient temperature, the product is taken out, and washed with anhydrous ethanol and water in turn to obtain the magnetite nanoparticles. The soluble iron salt includes ferric chloride, ferric sulfate, ferric acetate and ferric nitrate. The obtained nanospheres exhibit a uniform distribution of the particle diameter with a good dispersity in water. The nanospheres have superparamagnetism, and their particle diameter can be controlled by varying the reaction time as desired.

摘要翻译： 公开了一种制备磁铁矿纳米颗粒的方法，包括以下步骤：1）制备铁盐混合体系，其中可溶性铁盐在环境温度下溶于二醇，然后加入尿素和聚乙二醇并均匀混合，得到 三价铁盐混合体系，二醇与三价铁盐的质量比为15:1至60:1，二醇与尿素的比例为20:1至100:1，二醇与聚乙二醇的比例为20:1至100:1 ; 2）反应，其中将三价铁盐混合体系转移到反应釜中，密封并置于加热装置中，在200-300℃的温度下反应8至72小时; 和3）洗涤，其中在反应体系自然冷却至环境温度后，取出产物，依次用无水乙醇和水洗涤，得到磁铁矿纳米颗粒。 可溶性铁盐包括氯化铁，硫酸铁，醋酸铁和硝酸铁。 得到的纳米球表现出均匀的粒径分布，在水中具有良好的分散性。 纳米球具有超顺磁性，并且可通过根据需要改变反应时间来控制它们的粒径。