Preparation of monodispersed Cu nanoparticles by microwave-assisted alcohol reduction

被引：0

作者：

Nakamura, Takashi ^{[1
]}

Tsukahara, Yasunori ^{[3
]}

Sakata, Takao ^{[4
]}

Mori, Hirotaro ^{[4
]}

Kanbe, Yumi ^{[5
]}

Bessho, Hisami ^{[5
]}

Wada, Yuji ^{[2
,3
]}

机构：

[1] Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871

[2] Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Okayama 700-8530

[3] Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871

[4] Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047

[5] Tokai Rubber Industries Ltd., 3-1 Higashi, Komaki 485-8550

来源：

Bulletin of the Chemical Society of Japan | 2007年 / 80卷 / 01期

关键词：

Copper (Cu) nanoparticles were prepared via a microwave-assisted alcohol reduction process. We have succeeded in selectively preparing monodispersed Cu nanoparticles with or without surface plasmon absorption. Monodispersed Cu nanoparticles with average sizes of 5-6 nm (with the surface plasmon absorption) and 2-3 nm (without the surface plasmon absorption) were prepared using copper(II) octanoate and copper(II) myristate; respectively; as the copper precursors by reduction with alcohols under microwave-heating at 443K for 20 min. Noteworthy; Cu2O and CuO were not observed in the electron diffraction patterns of the prepared Cu nanoparticles; demonstrating chemical stability of the nanoparticles against oxidation in air. When using a long-chain carboxylate as an organic moiety bearing a short alkyl chain (copper(II) octanoate); the rate of the reduction was faster than long one (copper(II) myristate). The activation energies for the reduction of Cu2+ using copper(II) octanoate and copper(II) myristate were estimated to be 115 and 124 kJ mol-1; respectively. We have shown that the length of the alkyl chain contained in the copper precursors; heating temperature; and microwave-irradiation time are important for rapidly preparing monodispersed Cu nanoparticles. © 2007 The Chemical Society of Japan;

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摘要：

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页码：224 / 232

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