Release Time:2020-02-17  Hits:

Indexed by: Journal Papers

Date of Publication: 2019-11-20

Journal: JOURNAL OF INORGANIC MATERIALS

Included Journals: PKU、SCIE

Volume: 34

Issue: 11

Page Number: 1181-1186

ISSN: 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.