Growth of carbon nanotubes in calcium phosphate matrix with different Ca/P molar ratio
This paper reports that carbon nanotubes (CNTs) can be successfully grown from calcium phosphate matrix without additional catalysis of transition metal by chemical vapor deposition (CVD) using acetylene as carbon source. There is a great difference in the CNT growth from the matrix prepared with the different initial Ca/P molar ratio. The matrix prepared with lower initial Ca/P molar ratio is favorable for the growth of CNTs. A number of multi-walled CNTs with the diameter of 25~40 nm and 15~25 nm can be produced from the matrix with initial Ca/P molar ratio of 1.5 and 1.625, respectively, while no CNTs can be grown from the matrix with initial Ca/P molar ratio of 1.67. Tricalcium phosphate and hydroxyapatite crystallites with crystal size smaller than 50 nm besides carbon crystals are found in the as-obtained powders prepared with initial Ca/P molar ratio of 1.5 and 1.625. Compared with the growth of CNTs produced from all the matrixes, it is found that the CNTs grown from this matrix with Ca/P molar ratio of 1.5 have the longest tube length, cleanest and smoothest wall surface, and the content of CNTs is highest.
Carbon Nanotubes Calcium Phosphate Chemical Vapor Deposition (CVD) Ca/P molar ratio
XiaoYing Lu Tian Qiu JieYu Liu BaoHua Wu Jie Weng
Key lab of advanced technologies of materials (ministry of education of china), school of materialss Key lab of advanced technologies of materials (ministry of education of china), school of materials
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
141-147
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）