Analyse der Partikelbildung aus der Elektrospray‐Flammensprühpyrolyse mittels Scanning Mobility Particle Sizer

Abstract

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Die elektrohydrodynamische Zerstäubung von flüssigen Präkursoren gekoppelt mit der Flammensprühpyrolyse erlaubt die Synthese von verschiedenartigen, metalloxidischen Nanopartikel. Ein Aufbau bestehend aus einem definiert verfahrbaren Brenner und einer Probennahme in der Flamme eröffnet dabei die Möglichkeit der Erfassung von Partikelgrößenverteilungen entlang der Flammenhöhe. Die Bildung von Eisenoxid-und Siliziumdioxid-Partikel in einer Flamme konnte so mithilfe eines 1nm-SMPS-Aufbaus (Scanning Mobility Particle Sizer) auch in den Frühstadien der Partikelbildung erfasst werden. Hierbei zeigte sich, dass auch für einfache Präkursorlösungen bei hinreichend kleinen Tropfen hochwertige, homogene Nanopulver erzeugt werden können.

Synthesis of Pure and Fe-Doped TiO2 Nanoparticles via Electrospray-Assisted Flame Spray Pyrolysis for Antimicrobial Applications

“…A pressured sheath air coflow (approximately 11 L min −1 ) was used for flame shaping, especially for stabilizing the flame due to the low fuel gas velocities. As detailed in our previous work, 13 temperature profiles of the flame were recorded from 40 to 290 mm heights above the burner (HAB) using a Type-K thermocouple. Because of the relatively low flow rates of the gaseous fuels, the temperatures recorded were moderate.…”

“…The experimental setup was conceptually similar to that recently reported. , In short, the SPP1980 SpraySyn burner was used as a lab-scale standard burner Figure displays the schematic diagram of the EAFSP setup.…”

“…12 However, FSP requires large amounts of atomizing gas and complex solvents that may limit the quality of the synthesized nanopowders. 13 The FSP process also depends on the atomization technique, which generates clouds of polydisperse droplets. 14 To address these drawbacks, in this work, the precursor solutions were sprayed into the FSP by electrohydrodynamic atomization, which is termed electrospray-assisted flame spray pyrolysis (EAFSP).…”

“…FSP synthesis has advantages that include rapid synthesis (typically in the range of milliseconds), without the formation of liquid byproducts, easier collection of products, and fewer process steps . However, FSP requires large amounts of atomizing gas and complex solvents that may limit the quality of the synthesized nanopowders . The FSP process also depends on the atomization technique, which generates clouds of polydisperse droplets …”

In situ online detection of atmospheric particulate matter based on laser induced breakdown spectroscopy: a review

“…M. Bierwirth et al investigated different metal oxide nanoparticles under electrospray flame pyrolysis. 99 Ye et al detected copper particles in oil-immersed transformers and improved their detection performance using spark discharge assistance. 100 E. Dobrzynska et al studied the harmfulness of fine particulate matter emitted during additive manufacturing processes.…”