Electrically-Assisted Flame Aerosol Synthesis of Nanoparticles

纳米粒子的电辅助火焰气溶胶合成

• 批准号: 9619392
• 负责人: Panagiotis Smirniotis
• 金额: $ 30万
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9619392&HistoricalAwards=false
• 关键词: Electrically; Assisted; Flame; Aerosol; Synthesis

Abstract CTS-9619392 S.E, Pratsinis U. of Cincinnati A combined experimental and modeling investigation of the effect of electrical charging on the formation of ceramic nanoparticles in flames will be undertaken. Experiments have shown that the particle size can be controlled within 1 nm in specific ranges of particle properties and flame characteristics. Electric fields are created in region of particle formation at crossflow with flame gases, and the resulted particles are charged by using a corona discharge to reduce agglomeration. In-situ Fourier Transform Infra Red spectroscopy will be performed to measure the temperature of gases and particles in collaboration with the Case Western Reserve University (Prof. P. Morrison). The evolution of the particle size and structure along the flame axis will be measured using rapid thermophoretic sampling in collaboration with the Case Western Reserve University (Prof. C.M. Magaridis). Particle and concentration characterization will be performed with a differential mobility analyzer, scanning and transmission electron microscopy, X-ray diffraction and specific surface area analysis. A model including particle nucleation, surface growth, coagulation, sintering and charging in three-dimensional conditions will be developed. The home university and the Ohio State will provide matching funds in total value of $169,600 for this project. If successful, this project ill provide a better fundamental understanding of particle formation processes in flames, a data base for further modeling efforts, and overall an approach to synthesise non-agglomerated nanoparticles at high rates and at a relatively low cost.

摘要 CTS-9619392 S.E，Pratsinis U. of Cincinnati 将针对充电对火焰中陶瓷纳米颗粒形成的影响进行实验和建模相结合的研究。实验表明，在特定的颗粒性质和火焰特性范围内，颗粒尺寸可控制在1 nm以内。 在与火焰气体交叉流动的颗粒形成区域中产生电场，并且通过使用电晕放电使所得颗粒带电以减少团聚。 将与凯斯西储大学（P. Morrison 教授）合作进行原位傅立叶变换红外光谱测量气体和颗粒的温度。 将与凯斯西储大学（C.M. Magaridis 教授）合作，使用快速热泳采样来测量颗粒尺寸和结构沿火焰轴的演变。 将使用微分迁移率分析仪、扫描和透射电子显微镜、X 射线衍射和比表面积分析来进行颗粒和浓度表征。 将开发一个包括三维条件下的颗粒成核、表面生长、凝结、烧结和充电的模型。母校和俄亥俄州立大学将为该项目提供总价值169,600美元的配套资金。 如果成功，该项目将提供对火焰中颗粒形成过程的更好的基本了解，为进一步建模工作提供数据库，并总体上提供一种以高速率和相对较低的成本合成非团聚纳米颗粒的方法。