The N2 adsorption–desorption isotherms of the carbon precursor and activated carbons were measured on an automatic adsorption instrument (ASAP 2020M, Micromeritics, Norcross, GA, USA) at 77 K [20 (link)]. The specific surface areas of the specimens were calculated by the BET equation, assuming the nitrogen molecule area of 0.162 nm2. The total pore volume was estimated as liquid volume of the adsorbate adsorbed at P/Po = 0.99 [21 (link)]. The average pore sizes were estimated by 4 V/A, where V is total pore volume and A is BET surface area. The micropore volume was determined by means of the t-Plot method. The pore size distributions were obtained by the BJH method [22 (link)].
Asap 2020m
The ASAP 2020M is a surface area and porosity analyzer that measures the specific surface area and pore size distribution of solid materials. It employs the principles of gas adsorption and desorption to determine these properties. The ASAP 2020M is capable of analyzing a wide range of materials, including powders, porous solids, and thin films.
Lab products found in correlation
41 protocols using asap 2020m
Characterization of Activated Carbons
The N2 adsorption–desorption isotherms of the carbon precursor and activated carbons were measured on an automatic adsorption instrument (ASAP 2020M, Micromeritics, Norcross, GA, USA) at 77 K [20 (link)]. The specific surface areas of the specimens were calculated by the BET equation, assuming the nitrogen molecule area of 0.162 nm2. The total pore volume was estimated as liquid volume of the adsorbate adsorbed at P/Po = 0.99 [21 (link)]. The average pore sizes were estimated by 4 V/A, where V is total pore volume and A is BET surface area. The micropore volume was determined by means of the t-Plot method. The pore size distributions were obtained by the BJH method [22 (link)].
Characterization of Porous Material Properties
infrared spectroscopy (FTIR, Spectrum one, PerkinElmer, Waltham, MA)
was used to characterize the occurrence of the reaction. Scanning
electron microscopy (SEM, FEI QUANTA FEG250) was used to investigate
the pore structure of the samples. Both nitrogen adsorption (ASAP
2020 M, Micromeritics, Norcross, GA) and mercury intrusion porosimetry
(Poremastier-60, Quantachrome, Boynton Beach, FL) tests were used
to measure the pore size and its distribution of the resultant material.50 (link) The wettability of the sample was studied by
measuring the contact angle (CA) on an instrument (OCA 40, Dataphysics,
Germany) at room temperature. Also, the CA was measured in several
environments including in air, underwater, and under oil. The thermal
stability of the samples was measured by Diamond TG/DTA (PerkinElmer,
Shanghai, China) by heating each sample from 25 to 800 °C, with
a heating rate 10 °C/min under a nitrogen atmosphere. The size
distribution of emulsion was further measured by a dynamic light scattering
nanosizer (DLS, Nano-ZS 3600, Malvern, UK) at room temperature.
Adsorption Capacity of Quartz and Cristobalite
of α-quartz was naturally collected from Guiding, Guizhou Province
of China, and the α-cristobalite sample was purchased from Veston
Silicon Co., Ltd. in Guiping County, Guangxi Province of China. To
acquire a relatively uniform average particle size, both samples were
ground with a planetary ball mill (FRITSCH Pulverisette 6, Germany)
for about 2 h. All of the powders were immersed in 0.01 M HCl solution
for 24 h and then rinsed with deionized water until they were free
from chloride ions. After drying, the samples were calcined in a muffle
furnace at 450 °C for 12 h. The specific surface area of samples
was determined by a Micromeritics ASAP 2020M specific surface area
and porosity analyzer. To compare well the surface property of α-quartz
and α-cristobalite, the adsorption capacity was all normalized
to the specific surface area of samples.
Reagent-grade crystal
violet (CV) (C25H30N3Cl·3H2O, purity ≥ 99.0%), from Tianjin Kemiou Chemical Reagent
Co., Ltd., was used to prepare all solutions for the adsorption experiments.
All solutions were prepared in deionized water, and the solution pH
was adjusted with standard acid (0.1 M HCl) and standard base (0.1
M NaOH) solutions.
Comprehensive Characterization of LAGP Composites
Comprehensive Characterization of Catalysts
Comprehensive Characterization of Nanomaterials
Comprehensive Material Characterization
Characterization of Catalytic Materials
X-ray diffraction (XRD) patterns were recorded on a Rigaku D/max-2550VB/PC
diffractometer by using Cu Kα radiation (λ = 0.15406 nm).
Nitrogen adsorption/desorption isotherms of the catalysts were measured
on a Micromeritics ASAP 2020M sorption analyzer at 77 K. The Brunauer–Emmett–Teller
(BET) method was used to calculate the surface area. Scanning transmission
electron microscopy (STEM) characterization was performed using a
Thermo Fisher Talos F200X microscope. High-angle annular dark-field
(HAADF)-STEM images were recorded using a convergence semiangle of
11 mrad and inner and outer collection angles of 59 and 200 mrad,
respectively. Chemical analysis of the samples was performed by using
inductively coupled plasma-atomic emission spectrometry (ICP-AES).
H2 temperature-programmed reduction tests were carried
out on a Huasi DAS-7200 automatic chemisorption instrument. In a typical
run, 0.1 g of the catalyst was put into the quartz tube. Before reduction,
the catalyst was degassed and dehydrated at 150 °C in Ar. The
temperature was controlled from 20 to 800 °C at a rate of 10
°C min–1.
X-ray photoelectron (XPS) spectra
were recorded on a Thermo Scientific
Escalab 250 Xi system with monochromatic Al Kα radiation, and
all results were calibrated using the C 1s peak at 284.8 eV.
Structural and Surface Characterization
Multimodal Characterization of SiO2-PANI Nanocomposite
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