Preparation of Low-dimensional Nickel Sulfide Nanocrystals via Microemulsion-assisted Hydrothermal Method

Abstract

Abstract: Nickel sulfide nanocrystals with novel morphologies of two-dimensional nanosheets and one-dimensional nanoneedles or nanotubes were successfully prepared in the CTAB/ n -pentanol/ n -hexane/water microemulsion under hydrothermal conditions at 130 ℃. XRD,TEM,SAED and TG-DSC were used to characterize the as-synthesized samples. TEM images show that nickel sulfide nanosheets with a small thickness(less than 10 nm) and nanoneedles with a hollow center(or nanotubes), ca . 50—150 nm in diameter and several microns in length,can be obtained by hydrothermally treating for 5 h and 15 h,respectively. XRD patterns show that the major phase of the nanosheets is hexagonal NiS_1.03,and that the nanoneedles are the mixture of hexagonal NiS_1.03 and a small amount of millerite NiS. The sulfuration reaction and the low-dimensional nanocrystal growth mechanism have been discussed in detail. The result reveals that the nanosheets firstly formed under the soft template action of the W/O microemulsion,and then the resulted nanosheets rolled up into one-dimensional nanoneedles or nanotubes.

Key words: Nanosheet, Nanoneedle, W/O microemulsion, Hydrothermal synthesis, Nickel sulfide

CLC Number:

O614
TB383

TrendMD:

CHEN De-Liang, GAO Lian . Preparation of Low-dimensional Nickel Sulfide Nanocrystals via Microemulsion-assisted Hydrothermal Method[J]. Chem. J. Chinese Universities, 2004, 25(8): 1407.

References

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