Preparation of carbon nanotubes by ethanol pyrolysis with loaded Fe mesoporous molecular sieve

MCM-41 mesoporous molecular sieve was synthesized by using hydrothermal method.Carbon nanotubes were synthesized by chemical vapor deposition(CVD) method using loaded Fe MCM-41 mesoporous molecular sieve as catalyst and ethanol as carbon source.The as-prepared samples were characterized by powder XRD-ray diffraction,Fourier transform infrared(FT-IR),transmission electron microscopy(TEM) and N2 physisorption.The results show that the long and well-ordered MCM-41 mesoporous molecular sieve was obtained with specific surface area of 1 077.79 m2/g and an average pore size of 3.21 nm.The open carbon nanotubes with uniform pore size were prepared,and the carbon nanotubes have an average diameter of 5 nm with less defect.In addition,the high pure carbon nanotubes were obtained by using ultrasonic treatment in HF(40%) solution.