双原位水热法制备纳米磁性氧化铈的性能及其对磷离子吸附作用  

Properties and Adsorption of Phosphorus ion of Nano-Magnetic Ceria Prepared by Double in Situ Hydrothermal Method

作　　者：李宏林[1][2][3] 李兆程 高华敏 李明玲[1][2] LI Honglin;LI Zhaocheng;GAO Huamin;LI Mingling(College of Chemistry and Material Engineering,Chao Hu University,Hefei 238000,China;Institute of Novel Functional Materials and Fine Chemicals,Chao Hu University,Hefei 238000,China;Key Laboratory of Resource Comprehensive Utilization of Chaohu University,Chaohu university,Hefei 238000,China)

机构地区：[1]巢湖学院化学与材料工程学院,合肥238000 [2]巢湖学院新型功能材料与精细化学品研究所,合肥238000 [3]巢湖学院资源综合利用重点实验室,合肥238000

出　　处：《中国陶瓷》2021年第8期44-50,共7页China Ceramics

基　　金：安徽省高校优秀拔尖人才培育资助项目(gxbjZD2020086);巢湖学院资源综合利用重点实验室(kj20zsys02);安徽高校自然科学研究重点项目:铸造废砂陶粒固定化有效微生物及其对河湖富营养水体净化研究(KJ2020A0682)。

摘　　要：采用双原位水热法制备了钴铁氧体(CoFe_(2)O_(4))含量不同的一组磁性氧化铈(CeO_(2)-CoFe_(2)O_(4)),研究了CeO_(2)-CoFe_(2)O_(4)晶体结构、微观形貌、磁性能及其对溶液中磷元素的吸收情况。X-射线衍射(XRD)图谱显示少量CoFe_(2)O_(4)的加入没有影响CeO_(2)的结晶性能,CeO_(2)-CoFe_(2)O_(4)具有典型的CeO_(2)特征峰,同时含有CoFe_(2)O_(4)特征峰;扫描电镜(SEM)图片表明CeO_(2)-CoFe_(2)O_(4)是均匀的立方体,粒度大约20~50 nm;CeO_(2)-CoFe_(2)O_(4)样品磁滞回线显示CeO_(2)-CoFe_(2)O_(4)样品铁磁性能明显,样品的磁性能随着其中CoFe_(2)O_(4)含量增加而增加;样品中Co^(2+)含量过高会导致样品粒径增大,团聚严重,从而影响其对溶液中磷离子吸附率,0.15g 2^(#)样品(Ce^(2+)与Co^(2+)摩尔比分别为20:1)吸附时间为10~20 min时吸附效果最好。A series of magnetic ceria(CoFe_(2)O_(4))with different content of CoFe_(2)O_(4) is prepared by double in situ hydrothermal Method.The crystal structure,morphology,magnetic and Adsorption stability of Phosphorus ion of the samples were characterized in detail by X-ray diffraction(XRD),scanning electron microscope(SEM),vibrating sample magnetometer(VSM)and so on techniques.XRD patterns showed that a small amount of CoFe_(2)O_(4) did not affect the crystallization properties of ceria,and CeO_(2)-CoFe_(2)O_(4) has typical characteristic peak containing both ceria and CoFe_(2)O_(4).SEM images indicated the CeO_(2)-CoFe_(2)O_(4) sampls was a uniform cube with particle size of about 20〜50 nm.The results of VSM displayed that the ferromagnetism of CeO_(2)-CoFe_(2)O_(4) sample is obviousm,and sample saturation magnetization increased with the CoFe_(2)O_(4) content.Adsorption rate of phosphorus ion in solution by sample was studied,and it was found the content of CO^(2+)in the sample is too high,the particle size of the sample increase and the agglomeration be serious,which affect the adsorption rate of phosphorus ion in the solution,and the best adsorption when the adsorption time was 10〜20 min for 2^(#)sample(the molar ratio of Ce^(2+)to CO^(2+)was 20:1)with 0.15g content.

关 键 词：双原位水热法 磁性 氧化铈 磷离子吸附作用 

分 类 号：TQ174.758[化学工程—陶瓷工业]