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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Microporous and Mesoporous Materials; v. 306, OCT 15 2020.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 14/25964-5 - Dos monômeros às nanopartículas: investigação in situ da formação de nanopartículas de ouro em tempo real por técnicas síncrotron e de microscopia
• Beneficiário: Florian Edouard Pierre Meneau
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/23427-0 - Estudo de nucleação de zeólitas mediante medidas de espalhamento de raios-X a baixos ângulos e técnicas de imagem com raios-X coerente.
• Beneficiário: Paloma Vinaches Melguizo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado