In U.S. Patent Application 20100015031, Korea Advanced Institute of Science and Technology (KAIST) (Daejeon, KR) scientists disclose carbon nitride nanotubes with nano-sized pores on their stems, their preparation method and a control method for the size and quantity of pores in them .
The research team of Professor Jeung-Ku Kang, Jai-Young Lee, Hyun-Seok Kim, Seong-Ho Yang, Kyu-Sung Han, Se-Yun Kim Jung-Woo Lee and Weon-Ho Sin, developed a manufacturing method for carbon nitride nanotubes with pores having the size of not more than 1 nm over structure of the nanotube. The inventors also provide a method to control the size and quantity of pores with size of not more than 1 nm during the preparation of the carbon nitride nanotubes pores over the structure of the nanotube. The KAIST method produces carbon nitride nanotubes with nano-sized pores by reacting hydrocarbon gas and nitrogen gas through plasma CVD in the presence of metal catalyst particles.
The carbon nitride nanotubes can increase gas adsorption energy through nano-sized pores existing over the structure and can be employed in gas detection sensors, nano filters, catalyst carriers for fuel cell, hydrogen storage media and other various applications. Additionally, the carbon nitride nanotubes with the controlled size and quantity of pores are applicable in gas detection sensors, nano filters, catalyst carriers for fuel cell, hydrogen storage media and other various applications.
FIG. 2 is a transmission electron microscope (TEM) illustrating general carbon nanotube after dispersing Ni over surface thereof by using 4 mM Ni acetate in ethanol solution;
FIG. 3 is a TEM illustrating the carbon nitride nanotubes after dispersing Ni over surface thereof by using 4 mM Ni acetate in ethanol solution.
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