Search Results

You are looking at 51 - 60 of 118 items for :

  • "pore size distribution" x
  • All content x
Clear All

Au loaded on SiO 2 were analyzed by atomic absorption spectroscopy (AAS, Varian 240FS). N 2 adsorption/desorption isotherms were obtained at −196 °C on an Omnisorp 100CX instrument, and pore size distributions were determined from desorption branch

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Lingli Peng, Xiangyu Xu, Zhi Lv, Jiaqing Song, Mingyuan He, Qian Wang, Lijun Yan, Yang Li, and Zhaofei Li

pore size distribution as well as the surface acid/base characteristics. To this end, considerable efforts have been directed toward the preparation of nanostructure Al 2 O 3 . Various morphologies of Al 2 O 3 , such as membrane [ 14 ], nanowires [ 15

Restricted access

introduced and related results on the confinement effects on materials and solid–liquid phase transition were reviewed [ 1 ]. In the second part, the application of thermoporometry to obtain pore size distribution (PSD) and various information about the pore

Restricted access

transform IR spectrometer (PERKIN-ELMER SYSTEM 2000 FTIR) was used to record IR spectra of the samples in KBr pressed pellets in the range of wavenumbers 400–4000 cm −1 . The specific surface area value and pore size distributions were determined

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Luiz K. C. de Souza, Juliana J. R. Pardauil, José R. Zamian, Geraldo N. da Rocha Filho, and Carlos E. F. da Costa

surface area, well-defined regular pore shape, and narrow pore-size distribution [ 1 ], MCM-41 materials are widely used as catalysts. The MCM-41 structure represents a hexagonal ordering of cylindrical channels consisting of amorphous silica with pore

Restricted access

Thermal transformation of polyacrylonitrile deposited on SBA-15 type silica

Effect on adsorption capacity of methyl–ethyl ketone vapor

Journal of Thermal Analysis and Calorimetry
Authors: Rafał Janus, Piotr Natkański, Anna Wach, Marek Drozdek, Zofia Piwowarska, Pegie Cool, and Piotr Kuśtrowski

the synthesized silica support were determined by XRD and N 2 adsorption methods. The collected isotherm is plotted in Fig. 1 , whereas the pore size distribution and the low angle XRD pattern of SBA-15 are shown in inset a and b, respectively. The

Open access

voltage of 100–120 kV. UV–Vis diffuse reflectance spectra of the samples were measured by using a UV-2450 (Shimadzu) UV–Vis spectrophotometer. The specific surface area was calculated by the Brunauer–Emmett–Teller (BET) method. Pore size distribution and

Restricted access

. The surface areas and pore size distributions of the calcined sorbents sampled from the fixed-bed were analyzed by Quantachrome Poremaster-60 GT mercury intrusion porosimeter. Results and discussion Calcination

Restricted access
Reaction Kinetics, Mechanisms and Catalysis
Authors: Jung-Nam Park, Jeong Kuk Shon, Mingshi Jin, Soo Sung Kong, Kiyoung Moon, Gwi Ok Park, Jin-Hyo Boo, and Ji Man Kim

–Emmett–Teller) surface areas were calculated from the adsorption branches in the range of relative pressure ( p / p 0 ) = 0.05–0.20. Pore size distribution curves were obtained from the adsorption branches by the BJH (Barrett–Joyner–Halenda) method. Temperature

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Xue-Gang Chen, Shuang-Shuang Lv, Ping-Ping Zhang, Lu Zhang, and Ying Ye

.1467 0.1178 44.54 2.88 Figure 7 and Table 2 show the derived pore volumes and pore size distributions of RHA samples

Restricted access