Akademik Veri Yönetim Sistemi
7. INTERNATIONAL MEDITERRANEAN CONGRESS, Valencia, İspanya, 9 - 11 Ocak 2025, ss.1-2
In this study the addition of ammonium hydroxide on the
morphology, crystal structure and porosity of boron nitride nanostructures were
examined. The results of study indicate
that the augmentation of ammonium hydroxide in the starting chemicals of boric
acid and urea led to an elevation in crystallinity and a reduction in pore
formation. The use of ammonium hydroxide changed the boron nitride structure
from its original bulk form containing open pores to initially to nanosheet
form and then to a prismatic rod structure. The formation of clustered boron
nitride nanosheets are observed when 1 mol/L ammonium hydroxide is used.
Although it is understood that boron nitride rods form at the 2 mol/L of
ammonium hydroxide addition, the surfaces of nanorods are still decorated with
nanosheets with similar size and morpholoy. The nanosheets on the rods were
positioned in a regular and ordered spacings. When the ammonium hydroxide addition is
increased further to 4 mol/L, the nanosheets are still visible on the boron
nitride rods but their sizes were increased and their regular spacings are
disrupted. Finally, when the ammonium hydroxide addition is increased to
maximum of 8 mol/L the boron nitride nanosheet formation ceases to exist and
the surfaces of boron nitride rods appear totally smooth. For the boron nitride
nanostructures, there is a clear correlation between the total surface area,
pore diameters, and the amount of ammonium hydroxide addition. While the pore
size decreases with increasing ammonium hydroxide, the surface area decreases
accordingly. The results indicate that the ammonium hydroxide addition could be
utilized to tailor the surface quality of boron nitride nanostructures that
could affect the storage capability.
Keywords: Boron nitride nanosheets, sol-gel,
ammonia hydroxide, crystallinity, porosity