Design of particles by spray pyrolysis and recent progress in its application

Abstract

Spray pyrolysis is a promising aerosol process to produce "designer particles" of precisely controlled morphology with decorations on surfaces or inside particles. Need of precise control of properties has sparked researches on aerosol process that may replace conventional processes such as solid state reaction process or liquid precipitation method. However, productivity is the biggest obstacle in the development of a commercial scale process because the aerosol process is essentially operated at low particle concentration compared to liquid phase processes. In this review, by reviewing publications for the last 10 years we discuss how researchers on spray pyrolysis circumvent this inherent limitation of the aerosol process. First, the process of particle design by spray pyrolysis is introduced. Some key criteria are explained for selecting each component of spray pyrolysis: precursor, additive, carrier gas, heat source, and reactor type. Second, key contributions of major groups in Korea, Japan, Europe, and America are described. Third, some of named processes to overcome productivity of spray aerosol process are introduced. Fourth, applications of spray pyrolysis to materials related to alternative energy, environmental cleaning, information processing and display, and biomaterials are considered. Finally, future prospects of spray pyrolysis are discussed along with current standing issues for further progress of spray pyrolysis.

Nanotechnology: Development and challenges in Indonesia

“…The capability of spray pyrolysis synthesis to produce controlled properties of particles provoked researchers on aerosol process to believe that it may replace conventional processes such as solid state reaction process or liquid precipitation method. However, productivity is the biggest obstacle in the development of a commercial scale process because the aerosol process is essentially operated at low particle concentration compared to liquid phase processes [29,30].…”

“…The gas flow rate is adjusted to several liters/minutes corresponding to the residence time of the particles inside the reactor; usually it is around several seconds at atmospheric pressure. Therefore, to fulfill the end product specifications of particles, there are three most important aspects that have to be considered prudently: the selection of precursors, method of droplet generation and selection of heat source and reactor as discussed [30][31][32].…”

Synthesis of nanosized metallic particles from an aerosol

“…By reviewing publications by (Jung, et al, 2010(Jung, et al, , pp.1621(Jung, et al, -1645 in the last 25 years, the total number of papers is around 4800, among which 3600 papers were published in the last 10 years. Based on the frequency of appearance in major journals, as shown in Fig.…”

“…Although in the last 25 years the colleagues at the Institute of Technical Sciences of the Serbian Academy of Sciences and Arts together with The Vinca Institute of Nuclear Sciences have had approx. 500 international references related to spray pyrolysis, these data are missing in this publication by (Jung, et al, 2010(Jung, et al, , pp.1621(Jung, et al, -1645. Spray pyrolysis has been mostly used for many years for the production of ceramic powders.…”

“…Many applications are presented in the automotive and food industries, environmental protection, chemicals and medicine. (Jung, et al, 2010(Jung, et al, , pp.1621(Jung, et al, -1645) Slika 6 -Vodeće zemlje u istraživanju procesa raspršivanja u poslednjih 10 godina (Jung, et al, 2010(Jung, et al, , pp.1621(Jung, et al, -1645 Ultrasound-modulated two-fluid (UMTF) atomization…”