Nucleation and crystal growth of zeolite A synthesised from hydrogels of different density

Impact of the Zn source on the RSN-type zeolite formation

“…Indeed, it is typical for zeolites and zeolite-like materials to release the water below 200 °C and the position of the dTG minimum provides information on the strength of the water bonding. 16 In the studied set of samples the minimums are found at very similar temperatures (Table 2), which indicates that the water in all samples is bonded with approximately the same strength and consequently that there are similarties in the structure of the solids. This supports the spectroscopic data which shows the presence of nearly identical types of chemical bonds in all the precursors.…”

“…Preparation and detailed characterization of new materials and improving the properties of "classical" zeolites (materials of desired size, morphology, acidity, ion-exchange capacity, hierarchization,…) are the two principal axes of research in zeolite science. [10][11][12][13][14][15][16] Understanding the mechanisms of formation of a particular material could enable the preparation of materials having the same structure but variable chemical composition and consequently different properties. Herein, the zincosilicate material RUB-17, which is so far the only known RSN-type zeolite material, is investigated.…”

3D Study of the Morphology and Dynamics of Zeolite Nucleation

“…A zeolite framework type can be synthesized from different initial systems that range from optically clear water solutions through hydrogels to very thick gels. Although structurally the products obtained from such systems are similar, their physical and chemical features are usually different 14. For example, the particle size, morphology, and level of aggregation will be different for each of the above‐described initial systems.…”

“…Although structurally the products obtained from such systems are similar, their physical and chemical features are usually different. [14] For example, the particle size, morphology,a nd level of aggregation will be different for each of the above-described initial systems.T he zeolite nuclea-tion is usually controlled by employing different initial systems that range from very dilute solutionst oe xtra-dense gels. [15,16] Microwave radiation or ultrasonic treatment are also used to promote au niformn ucleation in the system.…”

Progress in zeolite synthesis promotes advanced applications

“…Under variation of these parameters, the initial precursor mixtures can appear as dry solid, dense (viscous) gel, liquid gel, milky suspension, or water clear suspension prior hydrothermal treatment [8][9][10][11]. Almost immediate polymerization and depolymerization processes are occurred, and a possible precipitation can follow.…”