Spherical submicron YAG:Ce particles with controllable particle outer diameters and crystallite sizes and their photoluminescence properties

Abstract

We demonstrate the synthesis of spherical submicron YAG:Ce particles with controllable particle outer diameters and crystallite sizes and their photoluminescence properties, produced by a flame-assisted spray-pyrolysis method with annealing process.

A highly efficient deep red-emitting Mn4+-powered oxyfluoride nanophosphor developed for plant growth and optical thermometric applications

“…Because of the above reason, the ball-milled synthesized nanophosphor might have offered better light absorption and emission. Nandiyanto et al 42 and Nayak et al 43 also reached similar conclusions, suggesting that particle surface modification could be essential for maintaining high luminescence efficiency after milling.…”

Hydrothermally Synthesized ZnCr- and NiCr-Layered Double Hydroxides as Hydrogen Evolution Photocatalysts

“…Among NiCr-LDHs, on the contrary, the greatest specific surface area of 76 m 2 •g −1 was observed for the sample with intermediate crystallinity, NiCr-DC (L = 12.3 nm), while the least, NiCr-100 (L = 2.0 nm), and the most crystalline samples, NiCr-SHS (L = 25.7 nm), possess a surface area of only 47 and 45 m 2 •g −1 , respectively. These trends cannot be explained in light of the conventional idea of a symbatic increase in crystallite and particle sizes [99][100][101] usually leading to a reduction in a specific surface area. Since the LDHs' morphology is characterized by pronounced particle agglomeration (Figure 6), their specific surface may be rather affected by the features of these agglomerates (the number of cavities, their volume, etc.)…”

Flame-Made Ir–IrO2/TiO2 Particles as Anode Catalyst Support for Improved Durability in Polymer Electrolyte Fuel Cells

“…One of the promising methods to load a metal oxide onto another metal oxide is a flame aerosol process. The flame aerosol process is a simple and versatile method for synthesizing nanostructured particles in the gas phase with a high production rate from the laboratory to the industrial scale. − It can also be used for the production of metal-loaded metal oxide particles. The flame aerosol process offers the advantages of a single-step and continuous process, less time-consuming, a large temperature gradient, and high productivity. − This method allows synthesizing high-purity metal oxide nanoparticles with unique morphologies, − such as chain-like structures, close-packed aggregated network structures, necking structures, ,,, and fused-aggregated network structures. , These network structures of particles improve the conductivity and reduce the amount of usage of precious metals such as Pt, Ir, and Nb.…”