Amorphous (Zr,Hf)37Si63 alloys were produced by sputtering. Their total structure factors were determined by X-ray diffraction. Using the methods of isomorphous substitution and Reverse Monte Carlo simulation, the partial pair correlation functions were obtained. The results were compared with the partial functions of amorphous Ti40Si60. In the amorphous alloys under investigation the transitio...

Microporous titanosilicate Ti-MCM-68 (Ti-MSE) was successfully synthesized by post-synthetic isomorphous substitution of Ti for Al and proved to be a high-performance catalyst, in particular showing superior performance to TS-1, Ti-BEA, and Ti-MWW for phenol oxidation using H(2)O(2) as an oxidant.

Nitrate is an anion of major importance particularly in biological areas. Excessive amounts in water supplies indicate pollution from sewage or agricultural effluents. The effects of excessive quantities of nitrate in water are well known. In this research structural modification of natural clinoptilolite by isomorphic substitution was performed. Isomorphously substituted zeolite was prepar...

Zeolite LTA was synthesized in the laboratory and loaded with silver ions by isomorphous substitution technique. The silver-loaded zeolite A (Ag-LTA) characterized X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive (EDX) Fourier transformed infrared (FTIR) spectroscopy. XRD SEM analysis showed little or no changes phase purity of all zeolites before after io...

The isomorphous substitution of Si with metals other than Al in zeotype frameworks allows for tuning the acidity and, therefore, to tailor catalyst’s properties as a function desired catalytic reaction. In this study, B, Ga, and Ti are incorporated MFI framework silicalite samples following series increasing is observed: Ti-silicalite < B-silicalite Ga-silicalite. It also observed that lower...