乙二醇回流法合成纳米复合氟化物KAlF_4  

Synthesis Nano Complex Fluoride KAlF_4 by Reflux Method Using Ethylene Glycol as Solvent

作　　者：沈海云[1] 杨秋华[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《实验室研究与探索》2011年第10期8-10,共3页Research and Exploration In Laboratory

基　　金：国家自然科学基金资助项目(20671069)

摘　　要：以KF和Al(NO3)3.9H2O为反应物,采用乙二醇回流法合成了纳米复合氟化物KAlF4,考测了反应物的选择、配比、反应时间等因素对产物的影响,并利用XRD、TEM、XPS等技术对其结构、形貌、粒径以及表面氧含量进行了表征。结果表明,采用回流法在适当的反应条件下合成的KAlF4具有单一相结构的复合氟化物,平均粒径为32.5 nm,属于纳米颗粒,合成的产物不含晶格氧,仅有吸附氧且含量较低。该方法具有工艺简单、反应时间短、不腐蚀设备、不需要煅烧直接生成晶相等优点,具有广阔的开发应用前景。Nano complex fluoride KAIF4 particles were synthesized by refluxing method using KF and A1 （NO3 ）3· 9H20 as reactants in ethanediol,and different synthesis conditions such as reactants, ratio of reactants and reaction time were studied in the paper. The samples were characterized by X-ray diffraction （XRD） , transmission electron microscopy （TEM） ,X-ray electron spectroscopy （XPS）. The results show that single crystalline phase of KAIF4 can be obtained under the appropriate reaction conditions by reflux method, and the mean diameter of particles KAIF4 is approximately 32.5nm. Only chemi-adsorption oxygen （α-oxygen） exists on the surface of KAIF4 in the O_1s XPS peak spectra of KAIF4. The reflux method has many advantages such as simple process, mild conditions, fast phase-transformation rate, and so on. The method has a broad development prospect in the future.

关 键 词：KAlF4 回流法 合成条件 

分 类 号：O614.113[理学—无机化学] O614.3[理学—化学]