Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite
A technology of carbon nanotubes and hydroxides, which is applied in the field of metal oxides, metal hydroxide/carbon nanotube composite materials, and metal preparation, and can solve the problems of large particle size, poor loading effect, and low loading capacity. To achieve the effect of mild reaction conditions, short reaction time and easy realization
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[0029] Example 1. Preparation of platinum / multi-walled carbon nanotube nanocomposites
[0030] Add 1 mg of multi-walled carbon tubes with a diameter of 40-60 nm into 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of chloroplatinic acid ethanol solution with a concentration of 1.0 mg / mL to the dispersion; Under the action of ultrasound, 1 ml of a 0.36 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 27.4 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. The TEM photographs of the obtained material are shown in figure 1 (Microscope model JEM-2011, accelerating voltage 200kV). It can be seen from the figure that the platinum particles are uniformly loaded on the surface of the carbon tube, and their size distribution is narrow, with an average diameter of 2.4 nm. Due to the a...
Example Embodiment
[0031] Example 2. Preparation of platinum / multi-walled carbon nanotube nanocomposites
[0032] Add 1 mg of multi-walled carbon tubes with a diameter of 40-60 nm to 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of 0.14 mg / mL chloroplatinic acid ethanol solution to the dispersion; Under the action of ultrasound, 1 ml of a 0.05 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 5 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. Transmission electron microscopy analysis showed that platinum particles were uniformly loaded on the surface of the carbon tube, and their size was 1.9 nm.
Example Embodiment
[0033] Example 3. Preparation of platinum / multi-walled carbon nanotube nanocomposites
[0034] Add 1 mg of a multi-walled carbon tube with a diameter of 40-60 nm to 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of a 0.29 mg / mL chloroplatinic acid ethanol solution to the dispersion; Under the action of ultrasound, 1 ml of a 0.1 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 10 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. Transmission electron microscopy analysis showed that platinum particles were uniformly loaded on the surface of the carbon tubes, and their size was 2.0 nm.
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