Method for activating noble metal nano particles by liquid phase dissolving
A technology of nanoparticles and precious metals, which is applied in the field of liquid-phase dissolution and activation of precious metal nanoparticles, which can solve the problems of low catalytic performance and easy agglomeration of precious metal nanoparticles, and achieve the effects of environmental friendliness, improved catalytic performance and service life
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Embodiment 1
[0022] (1) Mix double-distilled water and platinum nanoparticles evenly in a mass ratio of 100:1, and place 5ml of the mixed solution in a glass pressure-resistant test tube;
[0023] (2) Using liquid nitrogen freezing method, pour liquid nitrogen into a PTFE beaker at room temperature, and place the glass pressure-resistant test tube filled with twice distilled water and platinum nanoparticles in step (1) in the liquid nitrogen In the PTFE beaker, pass about 2g of methyl chloride into the glass pressure-resistant test tube, the methyl chloride turns into a liquid phase, drain the air in the bottle before collecting, and tightly cover the bottle after collecting;
[0024] (3) Heat the glass pressure test tube in step (2) in an oil bath at a temperature of 150° C. for 3 hours, and then cool to room temperature to obtain activated noble metal nanoparticles.
[0025] The UV-Vis absorption spectrum was used to characterize the solution before and after heating in an oil bath at 15...
Embodiment 2
[0027] (1) Mix analytically pure n-hexane and platinum nanoparticles in a mass ratio of 50:1, and place 5ml of the mixed solution in a glass pressure-resistant test tube;
[0028] (2) Using liquid nitrogen freezing method, pour liquid nitrogen into a tetrafluoro beaker at room temperature, place the glass pressure-resistant test tube filled with analytically pure n-hexane and platinum nanoparticles in step (1) into the liquid nitrogen In a PTFE beaker, pass about 2g of methyl chloride into the glass pressure-resistant test tube, the methyl chloride turns into a liquid phase, drain the air in the bottle before collecting, and tightly cap the bottle after collecting;
[0029] (3) Heat the glass pressure test tube in step (2) in an oil bath at a temperature of 130° C. for 2 hours, and then cool to room temperature to obtain activated noble metal nanoparticles.
[0030] The ultraviolet-visible absorption spectrum was used to characterize the solution before and after heating in an...
Embodiment 3
[0032] (1) Mix analytically pure methanol and gold nanoparticles at a mass ratio of 75:1, and place 5ml of the mixed solution in a glass pressure-resistant test tube;
[0033] (2) Use the liquid nitrogen freezing method, pour liquid nitrogen into a tetrafluoro beaker at room temperature, and place the glass pressure-resistant test tube containing analytically pure methanol and gold nanoparticles in step (1) in the liquid nitrogen In the PTFE beaker, pass about 2g of methyl chloride into the glass pressure-resistant test tube, the methyl chloride turns into a liquid phase, drain the air in the bottle before collecting, and tightly cover the bottle after collecting;
[0034] (3) Heat the glass pressure test tube in step (2) in an oil bath at a temperature of 140° C. for 3 hours, and then cool to room temperature to obtain activated noble metal nanoparticles.
[0035] The ultraviolet-visible absorption spectrum was used to characterize the solution before and after heating in an ...
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