2016
DOI: 10.1016/j.micromeso.2015.09.028
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Amphiphilic organosilane and seed assisted hierarchical ZSM-5 synthesis: Crystallization process and structure

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Cited by 31 publications
(15 citation statements)
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“…Moreover, the high SiO 2 /Al 2 O 3 molar ratio of zeolite samples results in a weak peak at À106 ppm. Concerning about 27 Al MAS NMR, it was found that the resonance peak at 53 ppm was associated with tetrahedral aluminum (AlO 4 ), whereas there was not octahedral aluminum (0 ppm), indicating that all the Al atoms were incorporated in ZSM-5 zeolite framework without remaining in the precursor colloidal solution, 35,36 which was in better agreement with the results of 29 Si MAS NMR. Substantially, thermal stability of ZSM-5 zeolite is excellent, while the samples were a mass loss for evaporation of absorbed water ($100 C) and decomposition of little remaining TPA + (400-700 C) as shown in Fig.…”
Section: Zsm-5 Zeolite Characterizationsupporting
confidence: 69%
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“…Moreover, the high SiO 2 /Al 2 O 3 molar ratio of zeolite samples results in a weak peak at À106 ppm. Concerning about 27 Al MAS NMR, it was found that the resonance peak at 53 ppm was associated with tetrahedral aluminum (AlO 4 ), whereas there was not octahedral aluminum (0 ppm), indicating that all the Al atoms were incorporated in ZSM-5 zeolite framework without remaining in the precursor colloidal solution, 35,36 which was in better agreement with the results of 29 Si MAS NMR. Substantially, thermal stability of ZSM-5 zeolite is excellent, while the samples were a mass loss for evaporation of absorbed water ($100 C) and decomposition of little remaining TPA + (400-700 C) as shown in Fig.…”
Section: Zsm-5 Zeolite Characterizationsupporting
confidence: 69%
“…Meanwhile, the electron beam was not able to penetrate the zeolite particles, whereas raising the voltage would destruct the zeolite framework solely, so the crystal lattice fringes could not be exhibited well. 35,36 Just like that, Fig. 2c illustrated that the lattice spacings from HRTEM images via Fast Fourier Transform (FFT) algorithm were 0.37 and 0.38 nm which were by the lattice planes of [303] and [051] in the XRD analysis.…”
Section: Zsm-5 Zeolite Characterizationmentioning
confidence: 60%
“…Hierarchical Zeolites and Catalysts Preparation. Hierarchical ZSM-5 zeolites with diverse Si/Al molar ratios were synthesized via a hydrothermal method according to the literature 30,31 with the molar composition of 100SiO 2 /xAl 2 O 3 / 20TPAOH/5TPOAC/5Na 2 O/5000H 2 O (x = 0.5, 0.667, 1). In a typical run, NaAlO 2 , NaOH, and TPAOH were blended in deionized (DI) water and stirred for 30 min.…”
Section: ■ Experimental Sectionmentioning
confidence: 99%
“…S12 (ESI †)) also show that mesopore size decreases with increasing crystallization time from 6 h to 36 h. The above results conrmed that the original mesoporous materials are dissolved gradually to form a hierarchical structure. 67,68 As shown in Table S5 (ESI †), the S BET of the samples increases with the crystallization time increasing; the S ext tends to increase; the V micro of the samples increases gradually, whereas the V pore and V meso decreases. These results are also ascribed to the dissolution of original mesoporous materials and thereby the formation of HA-ZSM-5 zeolite.…”
Section: Formation Mechanism Of Ha-zsm-5 Zeolitesmentioning
confidence: 97%