NDLI: Synthesis of monodisperse α-Al2O3 nanoparticles by a salt microemulsion method

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Synthesis of monodisperse α-Al2O3 nanoparticles by a salt microemulsion method

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The Journal of Engineering

Synthesis of monodisperse α-Al2O3 nanoparticles by a salt microemulsion method

Content Provider	IET Digital Library
Author	Song, Li Dong, Yan Shao, Qiyue Jiang, Jianqing
Abstract	Alpha alumina nanocrystals that are highly dispersible and have a high specific surface area play an important role in the field of catalytic supports and others. As the phase-transformation temperature of α-Al2O3 is 1000°C, it is extremely difficult to fabricate monodisperse nanoparticles. Here, the study reports a new method, referred as the salt microemulsion method, for the fabrication of monodisperse α-Al2O3 nanoparticles, and the particle size could be tuned between 3 and 8 nm. The particles precipitated by demulsifying the microemulsion were analysed by transmission electron microscopy. The precipitated particles are found to be inclusions, with the Al2O3 precursor nanoparticles are dispersed and isolated by the K2SO4 nanoparticles. As the melting point of K2SO4 is 1065°C, the Al2O3 precursor nanoparticles are separated by the solid K2SO4 over the entire high-temperature phase-transition process. As a result, agglomeration and sintering of the α-Al2O3 nanoparticles are prevented, leading to monodisperse α-Al2O3 nanoparticles.
Starting Page	1071
Ending Page	1074
Page Count	4
Volume Number	13
e-ISSN	17500443
Issue Number	Issue 8, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/mnl/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/mnl.2018.0078
Journal	Micro & Nano Letters
Publisher Date	2018-08-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Al2O3 Alpha Alumina Nanocrystals Alumina Catalytic Supports Constant-composition Solid-solid Phase Transformations High Specific Surface Area High-temperature Phase-transition Process Inclusions K2SO4 Microemulsions Monodisperse NanoParticle Monodisperse Phase Nanofabrication Nanoparticle Nanotube And Nanostructured Material Particle Size Phase-transformation Temperature Polymorphic, Massive, And Order-disorder Precipitated Particle Precipitation Salt Microemulsion Method Solid-solid Transitions Solid-state Phase Transformations Structure of Solid Clusters Transmission Electron Microscopy
Content Type	Text
Resource Type	Article

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