Chem. J. Chinese Universities ›› 2005, Vol. 26 ›› Issue (9): 1594.

• Articles • Previous Articles     Next Articles

Preparation of Single Crystal CaSO4 Nanotubes: A Nanotube Growing Route for Compound with Non-layered Structure

GAO Yuan-Hao1, LIU Jin2, NIU He-Lin3   

  1. 1. Department of Chemistry and Chemical Engineering, Pingdingshan College, Pingdingshan 467002, China;
    2. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475000, China;
    3. Structure Research Laboratory, University of Science and Technology of China, Heifei 230022, China
  • Received:2004-12-06 Online:2005-09-10 Published:2005-09-10

Abstract: Single-crystal CaSO4 nanotubes were prepared via a solvothermal process by using lamellar {Ti-O-Ti} polymer coupling oleic acid as the frame developing agent .The nanotubes were characterized by X-ray diffraction(XRD), energy dispersive X-ray analysis(EDX), transmission electron microscopy(TEM) and convergent beam electron diffraction(CBED). Lattice parameters of CaSO4 single-crystal nanotubes are consistent with the standard values in JCPDS card of CaSO4, which belongs to a hexagonal system, space group P3m1(164). The morphology of CaSO4 nanotubes is mainly straight with inner hollow. The outer and inner diameters of the nanotubes are about 30 nm and 10 nm, respectively, and lengths reach up to 3.0 μm. The formation mechanism for CaSO4 nanotubes was also discussed .This paper presents a promising solvothermal method for the preparation of nanotubes of self-nonlayered ionic crystals in terms of rolling of layer-by-layer grown from frame developing agent of lamellar Ti-O-Ti polymer coupling oleic acid.

Key words: Ti-O-Ti polymer coupling oleic acid, Solvothermal method, Calcium sulphate, Nanotube, Frame developing agent

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