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NanoMat 2018
Nano Research & Applications
ISSN: 2471-9838
Page 92
April 26-27, 2018
Rome, Italy
17
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
Nano Res Appl, Volume:4
DOI: 10.21767/2471-9838-C1-009
T
he determination of the specific surface area (SSA) of solid
powders has been a long standing problem in surface science.
We use the zeta adsorption isotherm (ZAI) and propose a method
for determining the SSA of powders using the N
2
adsorption
measurements at 77K. The consistency of the results obtained
is demonstrated using two α-alumina samples that have different
total surface areas. When the proposed method is applied to
convert the amount adsorbed per unit mass to the amount
adsorbed per unit area, we show that there is no measurable
difference between their adsorption isotherms. Also, we show
the proposed method can be applied to six different powders
having a variation in their specific surface areas of two orders
of magnitude. The corresponding error can be obtained from
a single equilibrium adsorption measurement and maximum
standard deviation in the mean value of the SSA among six cases
is less than 7%.
charles.ward@utoronto.caSpecific surface area from nitrogen adsorption data at 77 K
using the zeta adsorption isotherm
Charles A Ward
1
, S Arman Ghaffarizadeh
1
and
Seyed Hadi Zandavi
2
1
University of Toronto, Canada
2
Massachusetts Institute of Technology, USA