CAJ | 학술논문

采用超声模板法结合共沸蒸馏和水热法处理前驱体成功制备出了纳米CeO_2颗粒,通过TEM、XRD、FT-IR、UV-Vis等分析方法对产物形貌、结构和性能进行了表征;研究了模板剂的性质、模板剂的用量、共沸蒸馏和水热处理对纳米CeO_2颗粒形态、尺寸的影响.实验结果表明,与OP-10和SDBS比较,CTAB最适合应用于制备纳米CeO_2颗粒.当模板剂用量为n(CTAB)∶n(Ce(NO_3)_3·6H_2O)=1∶2,制备出粒径约为6.1nm的球形纳米CeO_2;共沸蒸馏能有效去除前驱体中的模板剂和吸附水,丁氧基的取代吸附及其空间位阻作用有利于制得分散性好、粒度分布均匀、粒径约为1.5～2.2nm的纳米CeO_2颗粒;水热处理改善了纳米CeO_2颗粒的晶化度,避免了高温焙烧过程时硬团聚体的生成,颗粒尺寸为2.5～3.8nm;纳米CeO_2颗粒具有良好的可见光透过和优异的紫外光吸收性能.
채용초성모판법결합공비증류화수열법처리전구체성공제비출료납미CeO_2과립,통과TEM、XRD、FT-IR、UV-Vis등분석방법대산물형모、결구화성능진행료표정;연구료모판제적성질、모판제적용량、공비증류화수열처리대납미CeO_2과립형태、척촌적영향.실험결과표명,여OP-10화SDBS비교,CTAB최괄합응용우제비납미CeO_2과립.당모판제용량위n(CTAB)∶n(Ce(NO_3)_3·6H_2O)=1∶2,제비출립경약위6.1nm적구형납미CeO_2;공비증류능유효거제전구체중적모판제화흡부수,정양기적취대흡부급기공간위조작용유리우제득분산성호、립도분포균균、립경약위1.5～2.2nm적납미CeO_2과립;수열처리개선료납미CeO_2과립적정화도,피면료고온배소과정시경단취체적생성,과립척촌위2.5～3.8nm;납미CeO_2과립구유량호적가견광투과화우이적자외광흡수성능.
CeO_2 nanoparticles were successfully synthesized by ultrasonic template method combining with precursor treatment of butanol azeotropic distillation and hydrothermal method,respectively.The morphologies,structure and properties of the nanoparticles were characterized by TEM,XRD,FT-IR,UV-Vis,etc.The effects of the property of template,the amounts of template,azeotropic distillation and hydrothermal method on the grain morphology and size were investigated.The results showed that CTAB (cationic surfactant) was the best choice for the template,comparing with OP-10 and SDBS.Spherical CeO_2 nanoparticles (ca.6.1nm) were prepared when the molar ratios between CTAB and Ce(NO_3)_3·6H_2O was 1∶2;The azeotropic distillation effectively reduced the template and absorption water,The replace absorption and steric effects of butoxy conducive to synthesize nanoparticles with good dispersion,uniform particle size(ca.1.5-2.2nm).hydrothermal method improved the crystall-ization degree of the nanoparticles,avoiding the formation of hard agglomerates during the high temperature calcinations,the particle size was about 2.5-3.8nm;CeO_2 nanoparticles have high transparency in visible light and excellent UV-shielding property.