Preparation method of rhodium metal nanoparticles
A technology of metal nanoparticles and metals, which is applied in the field of preparation of rhodium metal nanoparticles, can solve the problems of long reduction time and large nanoparticles, and achieve the effects of fast reduction reaction speed, uniform particles and good catalytic performance
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[0024] Specifically, the preparation method of rhodium metal nanoparticles provided by the invention comprises the following steps:
[0025] S1, placing the mixed solution of the rhodium-containing solution and the auxiliary agent in a plasma discharge gas atmosphere;
[0026] S2, under the action of alternating current, the plasma formed by the discharge of the plasma discharge gas reduces the rhodium ions in the mixed solution into rhodium metal nanoparticles.
[0027] The rhodium-containing solution in the present invention includes a rhodium metal salt solution, preferably a rhodium metal chloride salt solution. After plasma glow discharge treatment, the rhodium ions in the rhodium metal salt in the rhodium-containing solution are reduced into rhodium metal nanoparticles.
[0028] In step S1, the auxiliary agent includes perchloric acid. The perchloric acid adopted in the present invention is pure perchloric acid. The auxiliary agent in the present invention destroys th...
Embodiment 1
[0039] will contain H 3 RhCl 6 , FeCl 3 and NiCl 2 A mixed solution of rhodium-containing solution and pure perchloric acid (H 3 RhCl 6 The molar mass of rhodium ions in HClO 4 The mass ratio of 1:25mol / g) is placed between the two electrode plates of the discharge tube in the vacuum chamber, sealed, the vacuum chamber is evacuated, and then filled with argon as the discharge gas, at normal pressure, 150V is applied to the electrode AC voltage, reduction of H by plasma glow discharge 3 RhCl 6 , the reduction time is 8min, and the rhodium metal nanoparticles are obtained, the purity is 99.95%, and the particle diameter is 7-14nm measured by transmission electron microscope.
Embodiment 2
[0041] will contain H 3 RhCl 6 , Fe 2 (SO 4 ) 3 and NiSO 4 A mixed solution of rhodium-containing solution and pure perchloric acid (H 3 RhCl 6 The molar mass of rhodium ions in HClO 4The mass ratio of 1:15mol / g) is placed between the two electrode plates of the discharge tube in the vacuum chamber, sealed, the vacuum chamber is evacuated, and then filled with air as the discharge gas, under normal pressure, 300V AC is applied to the electrodes voltage, using plasma glow discharge to reduce H 3 RhCl 6 , the reduction time is 15 minutes, and the rhodium metal nanoparticles are prepared, the purity is 99.95%, and the particle diameter is 9-17nm measured by transmission electron microscope.
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