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Synthesis of Metal Oxide Nanoparticles by Rapid, High‐Temperature 3D Microwave Heating
Author(s) -
Zhong Geng,
Xu Shaomao,
Chen Chaoji,
Kline Dylan Jacob,
Giroux Michael,
Pei Yong,
Jiao Miaolun,
Liu Dapeng,
Mi Ruiyu,
Xie Hua,
Yang Bao,
Wang Chao,
Zachariah Michael R.,
Hu Liangbing
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201904282
Subject(s) - materials science , nanoparticle , oxide , microwave , fabrication , metal , nanomaterials , carbonization , chemical engineering , thermal conductivity , nanotechnology , nanocomposite , microwave heating , quenching (fluorescence) , composite material , metallurgy , medicine , scanning electron microscope , physics , alternative medicine , pathology , quantum mechanics , engineering , fluorescence
Microwave‐assisted fabrication has propelled the recent synthesis and processing approaches of various nanomaterials. However, in most previous studies, the synthesis temperature is limited to below 1100 K, which restricts its application. Here, a rapid, in situ 3D heating method to manufacture well‐dispersed metal oxide nanoparticles on a 3D carbonized wood (denoted as C‐wood) host using microwaves as the driving power is reported. The moderate electronic conductivity of C‐wood contributes to the local Joule heating and the good thermal conductivity guarantees the rapid 3D heating of the overall material. The temperature of the C‐wood increases from room temperature to ≈2200 K in 4 s (≈550 K s −1 ), stabilizing to 1400 K, and then cooling back down to room temperature within 2 s. The preloaded precursor salts rapidly decompose and form ultrafine (≈11 nm) metal oxide nanoparticles on the surface of the C‐wood during the rapid quenching. The process takes place in air, which helps prevent the metal oxides from being reduced by the carbon. The 3D heating method offers an effective route to the rapid and scalable synthesis of metal oxide nanoparticles.