Extensive void defects in mesoporous aluminosilicate MCM-41

Article Abstract:

The mesoporous silica MCM-41 materials have been examined for numerous applications such as catalysts support, adsorbent and electronic and optical devices. On the basis of the analysis of transmission electron microscopy micrographs of these MCM-41 materials, it was observed that the sample with large type H4 hysteresis loop at p/p between 0.5 and 1.0 contains extensive structural defect holes amid the nanochannels.

Aluminum Silicate, Aluminum silicates, Properties

---

Controlling of physicochemical properties of nickel-substituted MCM-41 by adjustment of the synthesis solution pH and tetramethylammonium silicate concentration

Article Abstract:

The effect of initial synthesis solution pH and tetramethylamonium silicate concentration in the synthesis solution on the physical and chemical properties of MCM-41 was systematically investigated. Adjusting pH and tetramethylammonium fraction affects the porosity of MCM-41, surface free silanol group density, and the metal ion distribution in the silica framework.

Silicates, Chemical properties, Ammonium compounds, Ammonium chloride, Ammonium paratungstate, Ammonium salts, Methyl groups, Methyl compounds

---

Film formation of Ag nanoparticles at the organic-aqueous liquid interface

Article Abstract:

The study reports a wet-chemical method to make films by spontaneous assembly of passivated Ag nanoparticles at the organic-aqueous liquid interface. The interfacial films exhibit a blue opalescence and are characterized with transmission electron microscopy and UV-vis spectrophotometry.

Thin Film Materials, Gold Compounds, Spectra, Thin films, Dielectric films

Similar abstracts:

• Abstracts: Counter effect in acid synthesis of mesoporous silica materials. Synthesis of large pore disordered MSU-type mesoporous silicas through the assembly of C16 (EO) 10 surfactant and TMOS silica source: effect of the hydrothermal treatment and thermal stability of materials
• Abstracts: Size-selective incorporation of CdS nanoparticles into mesoporous silica. Effects of metal cation coordination on fluorescence properties of a diethylenetriamine bearing two end pyrene fragments

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.