欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用一种新的溶液生长法结合多步包覆法在自制的不同粒径SiO2单分散亚微球表面包覆不同厚度的β-FeOOH涂层,得到单分散β-FeOOH/SiO2核壳结构亚微球.实验结果表明,SiO2核心颗粒尺寸对表面涂层的形态和包覆均匀性有很大影响.当SiO2核心颗粒的平均粒径为250 nm左右时,β-FeOOH表面涂层均匀,颗粒间团聚较少,一次包覆后涂层厚度约为35 nm.涂层中β-FeOOH纳米棒的尺寸随着所选SiO2核心颗粒粒径的增大而相应增大.经多次包覆能够显著提高涂层的厚度,3次包覆后β-FeOOH表面涂层厚约100 nm.β-FeOOH/SiO2核壳结构亚微球与质量分数5%的NaOH溶液反应后,于600℃焙烧2 h得到了单分散α-Fe2O3空心微球.单分散α-Fe2O3空心亚微球表层是由α-Fe2O3纳米棒搭建而成的三维网络结构,α-Fe2O3纳米棒的尺寸与核壳结构中β-FeOOH纳米棒的尺寸基本一致.
英文摘要：
The home-made monodisperse SiO2 submicrospheres were coated with β-FeOOH by a new solution growth method.The size of SiO2 submicrospheres had great influence on the microstructures of β-FeOOH coatings.When the average diameter of the submicrospheres was 250 nm,the β-FeOOH coating was uniform and the average thickness of β-FeOOH coatings was about 35 nm after the first cycle of coating.The thickness of β-FeOOH coatings increased greatly with multistep coating.After three cycles of coating,the thickness of β-FeOOH coatings increased to about 100 nm.The core-shell composites were immersed in NaOH solution（5%,mass fraction） at 40 ℃ for 24 h to remove the silica cores and then calcined at 600 ℃ for 24 h to prepare the monodisperse α-Fe2O3 hollow submicrospheres.The α-Fe2O3 shells in the hollow submicrospheres were constructed with α-Fe2O3 nanorods interconnected.
同期刊论文项目
同项目期刊论文
Characterization and normalization factors of abiotic resource depletion for life cycle impact asses
Influence of Different Surfatants on Morphology of Single Crystal Ce2O(CO3)2·H2O and Formation Mecha
FEA modeling of effect of axial feeding velocity on strain field of rotary swaging process of pure m
Measurement of microemulsion zone and preparation of monodispersed cerium oxide nanoparticles by W/O
Facile synthesis of hydrophobic microporous silica membranes and their resistance to humid atmospher
Preparation and characterization of nanostructured Ni(OH)(2) and NiO thin films by a simple solution
Catalytically active gold nanoparticles confined in periodic mesoporous organosilica (PMOs) by a mod
3D finite element modeling of cogging-down rotary swaging of pure magnesium square billet - Revealin
Functionalization of periodic mesoporous organosilica with ureidopropyl groups by a direct synthesis
期刊信息
位置：