Direct Synthesis of Functional Zeolitic Materials

Abstract

Recently, the direct synthesis of zeolitic materials has received much attention because several well-defined functionalities have been introduced in those materials by "one-pot" methodologies. The rationalization of the physics and chemistry of the processes involved in the zeolite growth has allowed the direct preparation of different functional molecular sieves with unique properties and potential applicability in industry. In the present paper, the "one-pot" preparations of metal-containing zeolites (both in framework and extra-framework positions), hybrid organic-inorganic molecular sieves, hierarchical microporous mesoporous zeotypes, nanosheets, nanozeolites, or template-free molecular sieves are intensively evaluated.

Investigation of tertiary butyl alcohol as template for the synthesis of ZSM-5 zeolite

“…These have stable acidic and adsorption properties towards small molecules and ions [1]. The MFI skeleton of zeolite, which is mainly used as adsorbents and catalysts, was first synthesized by Argauer and Landolt in 1972 [2,3].…”

State of the art of Lewis acid-containing zeolites: lessons from fine chemistry to new biomass transformation processes

“…However, the introduction of transition metals in crystalline framework positions is not an easy task because framework insertion depends on the ionic radius of the metal, the rigidity of the zeolitic crystalline framework, as well as on the synthesis conditions (presence of cations, pH or metal sources). 11 In recent years, these metal-containing hydrophobic silicates with Lewis acid character, especially tin and zirconium-containing zeolites, have been synthesized and used as very efficient catalysts in different chemical processes. The range of applications has spanned from the synthesis of fine chemistry to biomass-transformation processes.…”

Efficient One‐Pot Preparation of Cu‐SSZ‐13 Materials using Cooperative OSDAs for their Catalytic Application in the SCR of NOx

“…[2] It would be then of interest to search new methods to reduce the number of intermediate stages required for the manufacture of metal-containing zeolites. [3] Cu-exchanged zeolites have been shown to be efficient catalysts for the selective catalytic reduction (SCR) of nitrogen oxides (NO x ) with urea or hydrocarbons as reducing agents. [4] Iwamoto et al reported that Cu-exchanged medium-and large-pore zeolites, such as Cu-ZSM-5 and Cu-Beta, are active catalysts for the SCR of NO x .…”