Surface properties of organo-silicate materials of MCM-41 type with incorporated C18phase

2005 ◽  
Vol 129 ◽  
pp. 207-211 ◽  
Author(s):  
W. M. Buda ◽  
S. Pasieczna ◽  
J. Ryczkowski ◽  
J. Goworek
Keyword(s):  
Surface Properties ◽  
Silicate Materials ◽  
Mcm 41

scholarly journals Nanostructured mesoporous silica: influence of the preparation conditions on the physical-surface properties for efficient organic dye uptake

2018 ◽  
Vol 5 (3) ◽  
pp. 172021 ◽  
Author(s):  
Rania E. Morsi ◽  
Rasha S. Mohamed
Keyword(s):  
Zeta Potential ◽  
Mesoporous Silica ◽  
Surface Area ◽  
Surface Properties ◽  
Morphological Structure ◽  
Dye Uptake ◽  
Physical Surface ◽  
Preparation Conditions ◽  
Kinetics And Isotherms ◽  
Mcm 41

A series of ordered mesoporous silica such as MCM-41, SBA-3 and SBA-15, in addition to silica micro- (SM) and nano- (SN) mesoporous particles, were prepared. The preparation conditions were found to greatly influence the physical-surface properties including morphological structure, porosity, particle size, aggregate average size, surface area, pore size, pore volume and zeta potential of the prepared silica, while the chemical structure, predicted from FT-IR spectra, and the diffraction patterns, predicted from wide-angle X-ray diffraction spectra, were identical. Surface areas of approximately 1500, 1027, 600, 552 and 317 m 2  g −1 , pore volumes of 0.93, 0.56, 0.82, 0.72 and 0.5 cm 3  g −1 , radii of 2.48, 2.2, 5.66, 6.6 and 8.98 nm, average aggregate sizes of 56, 65.4, 220.9, 73, 61.1 and 261 nm and zeta potential values of −32.8, −46.1, −26.3, −31.4 and −25.9 mV were obtained for MCM-41, SBA-3, SBA-15, SN and SM, respectively. Methylene blue dye uptake capacity of the prepared silica types was investigated using the batch technique and, in addition, the most effective material was further studied by the column flow system. The kinetics and isotherms of the uptake process were studied. The morphological structure, surface area, pore radius and zeta potential values were the most correlated factors.

Synthesis and surface properties of Ti-containing mesoporous aluminophosphates. A comparison with Ti-grafted mesoporous silica Ti-MCM-41

2003 ◽  
Vol 349 ◽  
pp. 259-264 ◽  
Author(s):  
Enrica Gianotti ◽  
Erica C. Oliveira ◽  
Salvatore Coluccia ◽  
Heloise O. Pastore ◽  
Leonardo Marchese
Keyword(s):  
Mesoporous Silica ◽  
Surface Properties ◽  
Mcm 41 ◽  
Mesoporous Aluminophosphates

scholarly journals Synthesis and Grafted NH2-Al/MCM-41 with Amine Functional Groups as Humidity Control Material from Silicon Carbide Sludge and Granite Sludge

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2107
Author(s):  
Ya-Wen Lin ◽  
Wei-Hao Lee ◽  
Kae-Long Lin ◽  
Bo-Yi Kuo
Keyword(s):  
Silicon Carbide ◽  
Surface Properties ◽  
Functional Groups ◽  
Low Cost ◽  
Moisture Adsorption ◽  
Adsorption And Desorption ◽  
Japanese Industrial Standard ◽  
Building Engineering ◽  
Desorption Capacity ◽  
Mcm 41

Mesoporous Al/MCM-41 was synthesized by extracting silicon carbide sludge and granite sludge as the sources of silicon and aluminum. Different concentrations of aminosilane (2.5, 5, 7.5 vol.%) were used to reflux the grafted NH2-Al/MCM-41 with amine functional groups (NH2-Al/MCM-41). The physical and chemical characteristics were analyzed. The results confirmed that silicon carbide sludge and granite sludge can effectively synthesize Al/MCM-41 with low cost and environmental protection. Reflow grafted amine functional groups can effectively improve the surface properties of NH2-Al/MCM-41. The moisture adsorption and desorption capacity of grafted NH2-Al/MCM-41 with amine functional groups was also studied. Based on moisture adsorption and desorption capacity, the surface properties of NH2-Al/MCM-41 were studied. When 5 vol.% of NH2-Al/MCM-41 amine functional groups is added, the moisture adsorption and desorption capacity is best. When the relative humidity = 95%, the equilibrium moisture content is 39.4 kg/kg, which complies with the standard of Japanese Industrial Standard (JIS A 1475). Therefore, the use of waste derived from the industry to replace expensive commercial materials was simple and environmentally friendly, and the grafted NH2-Al/MCM-41 with amine functional groups can be utilized in multiple applications, particularly as moisture regulation materials in building engineering.

Role of pore size and surface properties of Ti-MCM-41 catalysts in the hydroxylation of aromatics in the liquid phase

2001 ◽  
Vol 44-45 ◽  
pp. 581-586 ◽  
Author(s):  
Jing He ◽  
Wen-ping Xu ◽  
David G. Evans ◽  
Xue Duan ◽  
Cheng-yue Li
Keyword(s):  
Liquid Phase ◽  
Pore Size ◽  
Surface Properties ◽  
Mcm 41

Efficient catalytic conversion of jatropha oil to high grade biofuel on Ni-Mo2C/MCM-41 catalysts with tuned surface properties

2021 ◽  
Vol 61 ◽  
pp. 425-435
Author(s):  
Xiangze Du ◽  
Keyao Zhou ◽  
Linyuan Zhou ◽  
Xiaomei Lei ◽  
Huiru Yang ◽  
...  
Keyword(s):  
Surface Properties ◽  
Catalytic Conversion ◽  
High Grade ◽  
Jatropha Oil ◽  
Mcm 41
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