Effect of mother liquor addition on (P)MCM-22 synthesis

Author(s)

Vinaches, Paloma ^[1] ; de Mello, Mariele Soares ^[2] ; Meneau, Florian ^[1] ; Medeiros Costa, Izabel C. ^[2] ; Morgado, Edisson Jr Jr ; Pergher, Sibele ^[2]

Affiliation

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil

^[2] Fed Univ Rio Grande do Norte UFRN, Lab Peneiras Mol LABPEMOL, BR-59078970 Natal, RN - Brazil

• Document type: Journal article
• Source: Microporous and Mesoporous Materials; v. 306, OCT 15 2020.
• Web of Science Citations: 0

Abstract

Although there are a significant number of reports on zeolite synthesis, their nucleation and growth mechanisms are still under discussion. Therefore, in this work, we present an in-depth study of the effect of mother liquor addition on the synthesis of the zeolitic lamellar precursor (P)MCM-22. We analyzed several ex situ samples obtained in the presence and absence of mother liquor by X-ray diffraction, small-angle X-ray scattering, microscopy, thermogravimetry and nitrogen adsorption/desorption. We found that the spherical amorphous nanoparticles in the mother liquor were responsible for accelerating the reaction. In addition, the first crystalline sample obtained in the presence of mother liquor exhibited a high total pore volume. These new data not only helped elucidate the mechanism but also contributed to the synthesis of a material with attractive properties. (AU)

• FAPESP's process: 14/25964-5 - From the monomers to the nanoparticles: in situ real time investigation of gold nanoparticles formation by synchrotron and microscopy techniques
• Grantee: Florian Edouard Pierre Meneau
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 17/23427-0 - Study of zeolites nucleation by Small-Angle X-ray Scattering and Coherent X-ray imaging techniques.
• Grantee: Paloma Vinaches Melguizo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral