文献类型：期刊文献

中文题名：扩散火焰法控制TiO_2纳米晶粒径和晶型的研究

英文题名：Control of Size and Crystal Form of TiO_2 Nanocrystalline Synthesized by Co-flow Diffusion Flames

作者：刘秀红[1];赵尹[1];姜海波[1];干路平[1];李春忠[1]

机构：[1]华东理工大学超细材料制备与应用教育部重点实验室,上海200237

年份：2006

卷号：29

期号：4

起止页码：19

中文期刊名：非金属矿

外文期刊名：Non-Metallic Mines

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：扩散火焰;TiO2纳米晶;晶型;晶粒尺寸

外文关键词：co-flow diffusion flames TiO2 nanocrystalline crystalphase particle size

摘要：以TiCL4为前驱体,利用自行设计开发的扩散火焰燃烧反应器,通过调节关键反应条件,即中心环TiCL4进料浓度和氧气含量,控制合成粒径尺寸和晶型组成可控的TiO2纳米晶。TEM、XRD研究表明,制得的纳米晶分散性好,分布均匀,晶化完整,由锐钛矿型和金红石型两种晶型组成。在本实验条件下,通过调节TiCL4进料浓度和中心环氧气含量,制得了粒径大小在9.4nm￣15nm、锐钛矿型含量在68.3%￣100%间可控的TiO2纳米晶。
TiO2 nanocrystalline was synthesized by titanium tetrachloride and conducted in co-flow diffusion flames. The nanoctystalline was spherical in shape and uniformly distributed within the narrow size range. The objective of this study was to investigate control of phase composition and particle size of titania by varying the important operating conditions such as TiCh loading concentration and the molar ratio of O2 and N2 in the oxidizer. TEM and XRD results showed that particle size increased from 9.4nm to 15.5nm while the anatase fraction was constant by increasing the precursor TiCl4 loading from 8.75 × 10.5 mol/min to 4.38 × 10^-4 mol/min, the anatase fraction increased from 68.3% to 100% while the particle size was constant by increasing the content of O2 in the oxidizer from 0 to 100 %.