Articles written in Bulletin of Materials Science
Volume 34 Issue 5 August 2011 pp 1127-1135
Heterogeneous oxidation of cyclohexane with tertiobutyl hydroperoxide was carried out on Pt/oxide (Al2O3, TiO2 and ZrO2) catalysts in the presence of different solvents (acetic acid and acetonitrile). The catalysts were prepared using Pt(NH3)2(NO2)2 as a precursor and characterized by chemical analysis using the ICP–AES method, XRD, TEM, FTIR and BET surface area determination. The oxidation reaction was carried out at 70°C under atmospheric pressure. The results showed the catalytic performance of Pt/Al2O3 as being very high in terms of turnover frequency.
Volume 35 Issue 7 December 2012 pp 1187-1194
A series of SiO2, Al2O3 and TiO2 mixed vanadium materials have been prepared from inorganic precursors via the sol–gel process and subsequently dried, calcined and reduced at elevated temperatures. Structural characterization of these materials was carried out by X-ray diffraction (XRD), N2 adsorption at 77 K, thermal analysis (TGA/DTA), UV-vis diffused reflectance spectroscopy (DR UV-vis) and scanning electron microscopy (SEM) with energy dispersive X-ray (EDX). Their catalytic activities in the epoxidation of cyclohexene with TBHP as oxidant were also examined. Results of XRD and DR UV-visible diffused revealed that VO2 species are predominant in all samples and no formation of V2O5 was detected. Experimental results indicated that the VO2–SiO2 catalysts performed excellently for the epoxidation of cyclohexene by tertiobutyl hydroperoxide.
Volume 37 Issue 3 May 2014 pp 669-677
MTi𝑋 samples with different atomic chromium percentages were synthesized by sol–gel method and calcined at 400 °C under air. The effects of Cr and temperature on titanium dioxide phase transition were studied.
Volume 42 | Issue 6
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