Carbon-nano-tube prepared from poplar catkin and willow catkin as raw materials and preparation method
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A technology of carbon microtubes and catkins, which is applied in the field of preparation of carbon microtubes, can solve problems such as failure to find, and achieve good catalytic oxygen reduction reaction performance and capacitance characteristics.
Inactive Publication Date: 2011-06-08
NANJING UNIV OF POSTS & TELECOMM
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However, people still haven't found a suitable biomass precursor for carbonization to prepare carbon microtubes, although such a preparation method has many advantages such as simplicity, environmental protection, cheapness and scalability.
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Embodiment 1
[0023] Example 1 Put 100 mg of catkins in the middle area of the quartz tube in a horizontal tube furnace, heat it to a reaction temperature of 250-2000 °C at a heating rate of 1-30 °C / min under an argon protective atmosphere, and carbonize it for 10-180 min The product was obtained by naturally cooling to room temperature under an argon protective atmosphere.
Embodiment 2
[0024] Example 2 Put 100 mg catkins in the middle area of the quartz tube in a horizontal tube furnace, heat it to a reaction temperature of 250-2000 °C at a heating rate of 1-30 °C / min under an argon protective atmosphere, and carbonize it for 1-180 min The product was obtained by naturally cooling to room temperature under an argon protective atmosphere.
Embodiment 3750
[0025] Carbon microtubes obtained by carbonizing willow catkins for 60 min under embodiment 3750° C., in order to test its catalytic oxygen reduction reaction performance, at 25° C., the rotating disk electrode linear voltammetry curve of the above carbon microtubes (RED ) and the linear voltammetry curve (RRED) of the rotating disk ring electrode. The obtained carbon microtube 5 mg was ultrasonically dispersed in 5 mL of water to obtain a 1.0 mg / mL catalyst solution, and the obtained catalyst solvent (40 μL) was added dropwise on the surface of the glassy carbon electrode, dried at room temperature and then added dropwise with 0.5 μL of Nafion, Place it at room temperature for 12 hours until it is completely dry, and the test is carried out in an oxygen-saturated 1mol / L NaOH electrolyte. The test results show that this material has good performance in catalytic oxygen reduction reaction.
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Abstract
The invention discloses a carbon-nano-tube prepared from poplar catkin and willow catkin as raw materials and a preparation method. The carbon-nano-tube is prepared from poplar catkin and willow catkin as raw materials by using a carbonization method. The obtained carbon-nano-tube has the external diameter of 2-20 microns and the wall thickness of approximate 0.1-1.0 micron. The method for preparing the carbon-nano-tube comprises the following steps of: putting the poplar catkin or the willow catkin in a middle area of a silica tube in a tubular furnace, and increasing the temperature to 250-2000 DEG C under the inert atmosphere; and carbonizing for 10-180 min and naturally cooling to a room temperature under the inert atmosphere to obtain a product. Compared with an artificially synthesized carbon-nano-tube, the preparation method provided by the invention has the advantages of simple and convenient process, environmental protection, and the like, the prepared carbon-nano-tube presents favorable performance in aspects of catalytic oxygen reduction reaction, electrochemical capacitors, and the like and can be used as electrodes of fuel batteries and super capacitors. In addition, the prepared carbon-nano-tube has potential application values in aspects of ion batteries, drug delivery, microreactors, and the like.
Description
technical field [0001] The invention relates to the preparation of carbon microtubes and a method thereof by taking poplar catkins and catkins as raw materials. Background technique [0002] Since the Japanese scientist Ijima first obtained carbon nanotubes by the arc discharge method [S.Iijima, Nature, 1991, 354, 56.] in the 1990s, carbon nanotubes have been The special properties of optics and other aspects have been widely concerned and studied by scientists. At present, the synthesis methods of carbon nanotubes mainly contain arc method [T.W.Ebbesen, P.M.Ajayan, Nature, 1992,358,220.], laser evaporation method [T.Guo, R.E.Smalley.et.al., J.Phys.Chem. , 1995, 99, 10694.], chemical vapor deposition [R.Andrews, D.Jacques, D.L.Qian and T.Rantell, Acc.Chem.Res., 2002, 35, 1008.]. Chemical vapor deposition has become the most researched carbon nanotube synthesis method because of its low reaction temperature, simple equipment, rich types of carbon sources, low cost, large ou...
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