Nano Express

Nanoscale Research Letters

, Volume 5, Issue 1, pp 149-157

Open Access This content is freely available online to anyone, anywhere at any time.

Effect of Surfactants on the Structure and Morphology of Magnesium Borate Hydroxide Nanowhiskers Synthesized by Hydrothermal Route

  • Latha KumariAffiliated withDepartment of Physics, Florida International University
  • , W. Z. LiAffiliated withDepartment of Physics, Florida International University Email author 
  • , Shrinivas KulkarniAffiliated withDepartment of Mechanical and Materials Engineering, Florida International University
  • , K. H. WuAffiliated withDepartment of Mechanical and Materials Engineering, Florida International University
  • , Wei ChenAffiliated withDepartment of Mechanical and Materials Engineering, Florida International University
  • , Chunlei WangAffiliated withDepartment of Mechanical and Materials Engineering, Florida International University
  • , Charles H. VannoyAffiliated withDepartment of Chemistry, University of Miami
  • , Roger M. LeblancAffiliated withDepartment of Chemistry, University of Miami

Abstract

Magnesium borate hydroxide (MBH) nanowhiskers were synthesized using a one step hydrothermal process with different surfactants. The effect surfactants have on the structure and morphology of the MBH nanowhiskers has been investigated. The X-ray diffraction profile confirms that the as-synthesized material is of single phase, monoclinic MgBO2(OH). The variations in the size and shape of the different MBH nanowhiskers have been discussed based on the surface morphology analysis. The annealing of MBH nanowhiskers at 500 °C for 4 h has significant effect on the crystal structure and surface morphology. The UV–vis absorption spectra of the MBH nanowhiskers synthesized with and without surfactants show enhanced absorption in the low-wavelength region, and their optical band gaps were estimated from the optical band edge plots. The photoluminescence spectra of the MBH nanowhiskers produced with and without surfactants show broad emission band with the peak maximum at around 400 nm, which confirms the dominant contribution from the surface defect states.

Keywords

Magnesium borate hydroxide Nanowhiskers Hydrothermal synthesis Surface morphology X-ray diffraction