Photodecomposition of Water Catalyzed by Zr- and Ti-MCM-41
نویسندگان
چکیده
منابع مشابه
Enhanced HDN Performance of Al, Zr and Ti Modified NiW Catalysts by Using Co-Impregnation Method
The Al, Zr, and Ti modified MCM-41 materials were prepared by the post-synthesis method, and then the Ni-W species were introduced on them by using the co-impregnation method in order to obtain high-performance hydrodenitrogenation (HDN) catalysts. The activity of the catalysts was evaluated by the HDN reaction of quinoline. The optimum HDN activity was observed on the catalyst sup...
متن کاملModified Titanium Content in Titanosilicates Mesoporous Molecular Sieves MCM-41 as Selective Catalyst for Epoxidation of Alkenes
Ti-MCM-41 was synthesized at pH 3, 7 and 11. The titanium content was determined by AAS and found to be 4%, 3.2% and 4.5%, respectively. In order to increase the titanium content in Ti-MCM-41, Ti(IV) ions were grafted onto Ti-MCM-41 using TiCl4 in toluene and Ti(OBu)4 in ethanol. The incorporation of Ti was determined to be 28% and 30%, respectively. The oxidation of olefins such as cyclopenten...
متن کاملHighly efficient multicomponent Biginelli’s synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by Al-MCM-41 under solvent-free conditions
In this study, an efficient and green process for the synthesis of dihydropyrimidin-2(1H)-ones from aromatic benzaldehydes, ethyl acetoacetate and urea using Al-MCM-41 as heterogeneous catalyst and microreactor under solvent-free conditions has been developed. The advantages of this method are easy work-up procedure, regeneration of the catalyst, clean and neutral reaction conditions.
متن کاملHighly efficient multicomponent Biginelli’s synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by Al-MCM-41 under solvent-free conditions
In this study, an efficient and green process for the synthesis of dihydropyrimidin-2(1H)-ones from aromatic benzaldehydes, ethyl acetoacetate and urea using Al-MCM-41 as heterogeneous catalyst and microreactor under solvent-free conditions has been developed. The advantages of this method are easy work-up procedure, regeneration of the catalyst, clean and neutral reaction conditions.
متن کاملSynthesis of open chain analogue of 1,8-dioxooctahydroxanthene catalyzed by aluminosilicate MCM- 41
In this study, aluminosilicate MCM-41 has been found to be an efficient catalyst for reaction betweendifferent benzaldehyde derivatives and 5,5-dimethyl-1,3-cyclohexanedione to give open chain analogue of1,8-dioxo-octahydroxanthene in excellent yields. No evidence for the formation of cyclization products wasobserved. The catalyst can be used several times after recovery.
متن کامل