The Brunauer-Emmett-Teller (BET) specific surface area of functionalized diamond nanoparticles was determined from N2 adsorption/desorption isotherms obtained using a Micromeritics Gemini VII 2390 surface area analyzer. The pelleted nanodiamond was outgassed at 180°C under vacuum for 1 h using a Micromeritics VacPrep 061 sample degas system. The sample was subsequently introduced into the surface area analyzer and measured over the relative pressure range (P/P0) of 0.05-0.3, where P0 is the saturated pressure of N2.
Gemini 7 2390 surface area analyzer
Manufactured by Micromeritics
Sourced in United States
The Gemini VII 2390 is a surface area analyzer that measures the specific surface area and pore size distribution of solid materials using the gas adsorption technique. It determines the surface area and pore size characteristics of a wide range of materials, including catalysts, pigments, ceramics, and powders.
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3 protocols using gemini 7 2390 surface area analyzer
1
BET Surface Area of Functionalized Nanodiamonds
2
Nanoporous Material Characterization
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Specific surface area (BSSA), pore volume and size of blank and VLP loaded MSN were calculated by N2 adsorption/desorption analysis (Gemini VII 2390 surface area analyzer, Micromeritics, Norcross, USA) operating at −196.15 °C. Both samples were degassed at 200 °C for 24 h prior to analysis. Barrett-Joyner-Halenda (BJH) model was applied to determine pore size and pore volume distribution from desorption isotherm. The BSSA was calculated through Brunauer-Emmett-Teller (BET) using adsorption data at relative pressure (p/p°) [47 (link)].
3
Nanoparticle Surface and Structural Characterization
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The amount of surfactant remaining on the
nanoparticle surface was determined using a Q50 thermogravimetric
analyzer (TA Instruments, Inc., New Castle, DE) under air injection
with a heating rate of 5 °C/min up to 800 °C. The surface
area (SBET) of nanoparticles was estimated
by nitrogen physisorption at −149 °C using a Gemini VII
2390 Surface Area Analyzer (Micromeritics, GA, United States). The SBET values were determined following the BET
method.65 (link)The hydrodynamic diameter
of the nanoparticles was obtained by DLS measurements using a NanoPlus-3
(Micromeritics, USA) after sonication for 6 h at 25 °C. The zeta
potential was determined by electrophoretic light scattering to determine
the dispersion of nanoparticles in the aqueous phase using the NanoPlus-3
(Micromeritics, USA).66 (link),67 (link)Functional groups over
the surface of the nanomaterials were characterized by FTIR spectroscopy
with an IRAffinity spectrophotometer (Shimadzu, Japan). Each sample
was diluted with KBr at a 1:3 mass ratio. For sample detection, a
KCl cell with a 0.25 mm spacing was used and placed in the FTIR at
25 °C with 20 sweeps per minute for each sample in a range of
4000 to 500 cm–1 at a resolution of 2 cm–1.
nanoparticle surface was determined using a Q50 thermogravimetric
analyzer (TA Instruments, Inc., New Castle, DE) under air injection
with a heating rate of 5 °C/min up to 800 °C. The surface
area (SBET) of nanoparticles was estimated
by nitrogen physisorption at −149 °C using a Gemini VII
2390 Surface Area Analyzer (Micromeritics, GA, United States). The SBET values were determined following the BET
method.65 (link)The hydrodynamic diameter
of the nanoparticles was obtained by DLS measurements using a NanoPlus-3
(Micromeritics, USA) after sonication for 6 h at 25 °C. The zeta
potential was determined by electrophoretic light scattering to determine
the dispersion of nanoparticles in the aqueous phase using the NanoPlus-3
(Micromeritics, USA).66 (link),67 (link)Functional groups over
the surface of the nanomaterials were characterized by FTIR spectroscopy
with an IRAffinity spectrophotometer (Shimadzu, Japan). Each sample
was diluted with KBr at a 1:3 mass ratio. For sample detection, a
KCl cell with a 0.25 mm spacing was used and placed in the FTIR at
25 °C with 20 sweeps per minute for each sample in a range of
4000 to 500 cm–1 at a resolution of 2 cm–1.
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