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利用催化化学气相沉积法,以镍纳米颗粒为催化剂,在550℃条件下催化分解乙炔,制备出高螺旋纯度的螺旋碳纳米管(HCNTs)。再用二氟化氙在220℃将其氟化得到氟化螺旋碳纳米管(F-HCNTs)。利用XPS研究了F-HCNTs中F含量及其与C的结合形式,考察了它们对HCNTs光致发光性能的影响。结果表明:F与C的结合形式主要有离子型和半离子型;F-HCNTs在深紫外区域有较强的光发射;半离子型的F掺杂可以增强F-HCNTs的深紫外光发射。
Catalytic chemical vapor deposition was used to produce high-purity helical carbon nanotubes (HCNTs) by catalytic decomposition of acetylene at 550 ℃ with nickel nanoparticles as catalyst. The fluorinated helical carbon nanotubes (F-HCNTs) were then fluorinated with xenon difluoride at 220 ° C. The content of F in F-HCNTs and its combination with C were studied by XPS. The effects of them on the photoluminescence properties of HCNTs were investigated. The results show that the binding forms of F and C are ionic and semi-ionic. F-HCNTs have strong light emission in the deep ultraviolet region. Semi-ionic F-doping can enhance the deep ultraviolet light emission of F-HCNTs.