[9a-Z21-1~11] 【CS.8】 8.3 プラズマナノテクノロジー, 9.2 ナノ粒子・ナノワイヤ・ナノシート, 13.6 ナノ構造・量子現象・ナノ量子デバイスのコードシェアセッション

▼ [9a-Z21-5] Synthesis of Metal/carbon Nanocomposite by Gas/liquid Discharge Plasma
under High Pressure

〇Eiei Rin¹、Xin Hu¹、Wahyu diono¹、Hideki Kanda¹、Motonobu Goto¹ (1.Nagoya Univ.)

キーワード：pulsed arc discharged plasma, metal/carbon nanocomposite, amorphous carbon

In the present work, metal-based nanoparticles (NPs) encapsulated by the carbon nanosheets were synthesized through a one-step method by pulsed arc discharge plasma over the Ar/water interface under high pressure. The carbon nanosheets are formed from glycine dissolved in the water phase, which is an abundant, cheap, and environmental-friendly carbon precursor while metal-based NPs are generated instantaneously from metal electrodes. The experiments were conducted in the 100 g/L glycine solution at room temperature with the pressurized Ar gas at 0-4.0 MPa, the high-voltage of 18.6 kV supplied by DC pulsed power In the experiment, Ag, Ti, and Fe, three kinds of metal rods have been used as the anode to fabricate metal/carbon nanocomposites.
The HRTEM coupled with SAED (shown as the Fig.1) indicated that Ag, TiO₂, and Fe₃O₄ NPs successfully produced in uniform size around 10 nm are decorated on the amorphous carbon nanosheets. The effects of plasma parameters on the size distribution of the metal-based NPs have been studied by adjusting the Ar gas pressure, pulse frequency, and solution conductivity. With the increased gas pressure and the pulse frequency, the size of the metal-based NPs decreased. However, the solution conductivity showed no effect of the metal-based NPs.