Hits:

Indexed by:Journal Papers

Date of Publication:2019-11-20

Journal:JOURNAL OF INORGANIC MATERIALS

Included Journals:SCIE、PKU

Volume:34

Issue:11

Page Number:1181-1186

ISSN No.:1000-324X

Key Words:magnesium hydroxide sulfate hydrate; nanowire; potassium acid phthalate; complexation

Abstract:Magnesium hydroxide sulfate hydrate (MOS) nanowires were prepared with hydrothermal method by using potassium acid phthalate (KHpht) as the complexant. Complexation formed by pht(2-) and Mg2+ in this preparation system was analyzed by potentiometric titration. The effect of pht(2-) adsorption on MOS nanowires was investigated by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FT-IR) and transmission electron microscopy (TEM). These results show that pht(2-) complexes with Mg2+ in the reaction system substantially decreases free Mg2+ concentration and solution supersaturation. Chemical bonding between Mg2+ and pht(2-) exists on the surface of MOS crystal. Owing to the different configuration of the crystal lattice, pht(2-) adsorption on the lateral growth plane is more preferential than that on the axial growth plane, resulting in the formation with ratio of MOS nanowires.