Title

Flame synthesis of functional nanomaterials –a challenge to kinetics, diagnostics and process understanding 

Time: Dec. 8th, 4:00 PM Beijing

参会方式

蔻享学术直播 （扫码预约）

https://www.koushare.com/lives/room/288965

Speaker

Prof. Christof Schulz

IVG, Institute for Combustion and Gas Dynamics – Reactive Fluids and CENIDE, Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Duisburg, Germany

Abstract：

Flame synthesis of nanoparticles enables the generation of high-purity materials with well-controlled properties in continuous flow processes. It is an established technology for a couple of (mostly inorganic) commodities with more or less specific materials characteristics. However, increasing process understanding and control provides a chance for scale-up of highly specialized lab-scale technologies used for the manufacturing of unique materials to industrial scale. Nanoparticles with adjustable composition and size distributions are of interest for a wide variety of applications from coatings to electronics to functional materials, e.g., for energy conversion and storage. For the synthesis of materials with desired properties, the reaction conditions must be well controlled and the underlying processes understood. The decomposition kinetics of vaporized precursor compounds, as well as the reaction mechanisms of decomposition, cluster formation and particle nucleation, and the potential interaction with bath gases and flame chemistry is a prerequisite for a targeted synthesis of materials. Kinetics experiments are carried out in shock-tube reactors with optical and mass spectrometric detection of intermediate and product species. Flow reactors equipped with laser-based detection of temperature and species concentration as well as molecular-beam sampling techniques allow for detailed investigation of the particle formation processes. Reaction conditions such as temperature, intermediate species concentration and particle size must be determined in situ in lab-scale nanoparticle reactors and the definition of standardized experiments that allow to build-up large data bases for model development is important. The scale-up to pilot-plant-scale based on simulation and experiments finally helps to prove the viability of new technologies and their application on mass markets such as materials for batteries or electrocatalysis.

Biography:

Prof. Dr. Christof Schulz studied Chemistry at the University of Karlsruhe from 1988–94. He received his PhD at the Physical Chemistry Institute at the University of Heidelberg in 1997 with a thesis on the “Development and application of a laser-induced fluorescence method for the quantitative measurement of nitric oxide in internal combustion engines”. From 1997–2004 he headed the group on “Laser diagnostics in combustion processes” in the same institute where he also received his Habilitation in 2002. During this time, he spent several subsequent research periods at Stanford University, from 2000–02 as Visiting Scholar and from 2002–04 as Consulting Associate Professor. In 2004 he assumed the Chair for Combustion and Gas Dynamics at the University of Duisburg-Essen where he currently leads the Reactive Fluids group with around 45 scientists.

In 2014,  Christof Schulz received the Leibniz Prize of the German Research Foundation. In 1999 he received the Freudenberg Award of the Heidelberg Academy of Sciences and the 1. Prize of the BMW Scientific Award. He is editor-in-chief of the journal Progress in Energy and Combustion Science, co-editor of Applied Physics B, and member of the editorial boards of Applications in Energy and Combustion Science and Powder Technology. From 2007–10 he was deputy director and 2010–15 director of the Center for Nanointegration Duisburg-Essen (CENIDE). Since 2009 he is also the founding director of the Nano Energy Technology Center (NETZ) in Duisburg and since 2021 director of the Research Center on Future Energy Materials and Systems (RC-FEMS). He is Fellow of the Combustion Institute.

中国工程热物理学会燃烧学分会

清华大学燃烧能源中心