Journal ArticleDOI
Ultrasonic spray pyrolysis for nanoparticles synthesis
Shirley C. Tsai,Shirley C. Tsai,Y. L. Song,Chen S. Tsai,Chih-Chung Yang,Wen-Yen Chiu,Hong-Ming Lin +6 more
TLDR
In this article, the effects of precursor drop size and precursor concentration on product particle size and morphology in ultrasonic spray pyrolysis were investigated. But the results were limited to 6-9-micrometer precursors with holes due to high solvent evaporation rate.Abstract:
This article presents new findings regarding the effects of precursor drop size and precursor concentration on product particle size and morphology in ultrasonic spray pyrolysis. Large precursor drops (diameter > 30 μm) generated by ultrasonic atomization at 120 kHz yielded particles with holes due to high solvent evaporation rate, as predicted by the conventional one particle per drop mechanism. Precursor drops 6–9 μm in diameter, generated by an ultrasonic nebulizer at 1.65 MHz and 23.5 W electric drive power, yielded uniform spherical particles 90 nm in diameter with proper control of precursor concentration and residence time. Moreover, air-assisted ultrasonic spray pyrolysis at 120 kHz and 2.3 W yielded spherical particles about 70% of which were smaller than those produced by the ultrasonic spray pyrolysis of the 6–9 μm precursor drops, despite much larger precursor drop size (28 μm peak diameter versus 7 μm mean diameter). These particles are much smaller than predicted by the conventional one particle per drop mechanism, suggesting that a gas-to-particle conversion mechanism may also be involved in spray pyrolysis.read more
Citations
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Noble Metal Nanoparticles: Plant-Mediated Synthesis, Mechanistic Aspects of Synthesis, and Applications
TL;DR: In this article, a review has focused on the various plant-mediated nanoparticle fabrication approaches, with brief discussions on the categories of various plant mediated synthesis approaches and mechanistic aspects of plant mediated nanoparticle synthesis.
Journal ArticleDOI
Recent advancements in supporting materials for immobilised photocatalytic applications in waste water treatment.
TL;DR: The study revealed that factors such as high durability, ease of availability, low density, chemical inertness and mechanical stability are primary factors responsible for the selection of suitable supports for catalysts.
Journal ArticleDOI
A repertoire of biomedical applications of noble metal nanoparticles
Mohammad Azharuddin,Geyunjian Harry Zhu,Debapratim Das,Erdoğan Özgür,Lokman Uzun,Anthony Turner,Hirak K. Patra,Hirak K. Patra +7 more
TL;DR: Recent advances in the adaptation of noble metal nanomaterials and their biomedical applications in therapeutics, diagnostics and sensing are highlighted.
Journal ArticleDOI
Multifunctional Gold Nanoparticles: A Novel Nanomaterial for Various Medical Applications and Biological Activities
TL;DR: This article systematically review the methods of synthesis, the modification and characterization techniques of AuNPs, medical applications, and some biological activities of Au NPs, to provide a reference for future studies.
Journal ArticleDOI
Rare earth (RE) doped phosphors and their emerging applications: A review
TL;DR: The role of rare-earth activated phosphors as an activator as well as a sensitizer in doped materials and possible transitions within their energy levels are reviewed in detail in this article.
References
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Journal ArticleDOI
Ceramic Powder Synthesis by Spray Pyrolysis
TL;DR: A review of spray pyrolysis processes in terms of the process parameters that enable the formation of particles with controlled morphology and composition can be found in this paper, where it is demonstrated that mixed metal oxide, nonoxide, and composite particles that are solid, hollow, porous, or fibrous can be produced by modifying the precursor characteristics, solution properties, and process parameters.
Book
Aerosol Processing of Materials
TL;DR: A review of recent advances in aerosol generation of materials is presented in this article, where gas-to-particle and spray processes (spray pyrolysis) for powder generation and various routes for film generation are discussed from the experimental and theoretical perspectives.
Journal ArticleDOI
Production of ultrafine metal oxide aerosol particles by thermal decomposition of metal alkoxide vapors
Kikuo Okuyama,Yasuo Kousaka,Noboru Tohge,Satoru Yamamoto,Jin Jwang Wu,Richard C. Flagan,John H. Seinfeld +6 more
TL;DR: In this paper, high-concentration ultrafine particles having geometric mean diameters ranging between 0.01 and 0.06 µm and a geometric standard deviation of about 1.4 were obtained by varying the temperatures of the evaporator containing the liquid alkoxides and the reactor furnace, and the flow rate of carrier gas.
Journal ArticleDOI
Synthesis of Solid, Spherical Zirconia Particles by Spray Pyrolysis
TL;DR: In this paper, a model is used to predict solid particle formation during spray pyrolysis by correlating droplet shrinkage before salt precipitation with its relative solution saturation, which allows the drying droplet more time and a shorter diffusion distance in which to maintain chemical homogeneity before precipitation.
Journal ArticleDOI
Power generation and steam electrolysis characteristics of an electrochemical cell with a zirconia- or ceria-based electrolyte
TL;DR: In this paper, a solid oxide fuel cell (SOFC) and a SOEC have been investigated using a zirconia- or ceria-based solid electrolyte, and significant concentration overvoltage was observed in the V-I characteristics of SOFC and SOEC operated in different PH2 and PH2O atmospheres.