2005
DOI: 10.1016/j.micromeso.2004.10.031
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Effect of the silica sources on the crystallinity of nanosized ZSM-5 zeolite

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Cited by 120 publications
(58 citation statements)
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“…Silica precursors are important in the synthesis of zeolites because of their effect on the nucleation and crystallization rates (Mohamed et al 2005a). Zeolite formation strongly depends on releasing fragile silicate intermediates during silica dissolution, which is also affected by the silica source nature.…”
Section: Introductionmentioning
confidence: 99%
“…Silica precursors are important in the synthesis of zeolites because of their effect on the nucleation and crystallization rates (Mohamed et al 2005a). Zeolite formation strongly depends on releasing fragile silicate intermediates during silica dissolution, which is also affected by the silica source nature.…”
Section: Introductionmentioning
confidence: 99%
“…A TGA curve for Ag-ZSM5 shows four steps of weight loss with total weight loss of 25.45%. In first step the weight loss is of 5.812%, which is in the temperature range of 300K to 450K, and is due to the loss of molecular and adsorbed water [16]. The second step in the temperature range of 450K to 650K, the weight loss of 2.343%, which corresponds to removal of Tetra Ethyl Ammonium Bromide (TEA-Br) and which was used as a structure direacting agent while synthesizing ZSM5 zeolite.…”
Section: Methodsmentioning
confidence: 99%
“…Todas as amostras apresentaram espectros característicos da ZSM-5, com bandas em torno de 450 cm -1 , devido aos estiramentos Si-O e Al-O, em 550 cm -1 , característico do anel duplo de cinco membros, próximo de 795 cm -1 , atribuído ao estiramento simétrico externo, e em torno de 1100 cm -1 , banda característica das vibrações assimétricas internas aos tetraedros Si-O-Al (Colpo, 2013;Mohamed et al, 2005;2008;Kulkarni et al, 1982). As bandas reduzidas em torno de 550 cm -1 se devem a presença de impurezas nas amostras (Calsavara et al, 2000).…”
Section: unclassified