2008
DOI: 10.1016/j.micromeso.2007.11.044
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Post-transformation of MWW-type lamellar precursors into MCM-56 analogues

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Cited by 64 publications
(52 citation statements)
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“…Following our previous procedures for post-synthesizing MCM-56 analogues of titanosilicate and aluminosilicate [23,24], the structural transformation to Sn-MCM-56 was attempted by carrying out acid treatment on as-synthesized Sn-MCM-22(P) precursor in 2 M HNO 3 solution (solid-to-liquid ratio of 1:50) at room temperature for 6 h. The acid-treated sample was subsequently calcined in air at 823 K for 10 h to remove residuary organic species of SDA. For control experiment, the MWW precursor was refluxed in HNO 3 solution to obtain Sn-MCM-22(A) with a conventional 3D MWW structure.…”
Section: Synthesis Of Materialsmentioning
confidence: 99%
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“…Following our previous procedures for post-synthesizing MCM-56 analogues of titanosilicate and aluminosilicate [23,24], the structural transformation to Sn-MCM-56 was attempted by carrying out acid treatment on as-synthesized Sn-MCM-22(P) precursor in 2 M HNO 3 solution (solid-to-liquid ratio of 1:50) at room temperature for 6 h. The acid-treated sample was subsequently calcined in air at 823 K for 10 h to remove residuary organic species of SDA. For control experiment, the MWW precursor was refluxed in HNO 3 solution to obtain Sn-MCM-22(A) with a conventional 3D MWW structure.…”
Section: Synthesis Of Materialsmentioning
confidence: 99%
“…This kind of unique structure might facilitate the reactant molecules to reach the active centers and therefore improve catalytic activity. We once showed that it is possible to post-synthesize the titanosilicate and aluminosilicate with a structure analogous to MCM-56 from corresponding MWW lamellar precursors that are fully crystallized by hydrothermal synthesis [23,24].…”
Section: Postsynthesis Of Sn-mcm-56 Analoguesmentioning
confidence: 99%
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“…We believe that the permanence of our delamination approach is facilitated by lattice distortions along both the c-axis and the a-b plane, which are induced by substitution of Al for B. Other examples of surfactant-free synthesis of more accessible zeolites include synthesis of MCM-56 analogues, [14][15][16] IPC-1P, 17 IPC-1PI, 18 IPC-2 and IPC-4. 19 Synthesis of heteroatom-substituted zeolites where heteroatoms are located in framework T-positions of all-silica analog zeolites is invaluable for zeolite catalysis.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, developing alternative titanosilicates with large external surface and rich exposed Ti sites to dibenzothiophene molecules still has a challenge. Wang et al [ 100 ] developed a post-synthesis methodology to prepare a titanosilicate catalyst from acid-treating the 3D Ti-MWW precursors at low temperatures, leading to high crystalline Ti-MCM-56 analogues after calcination. Compared with 3D Ti-MWW, the Ti-MCM-56 analogues has a much larger external surface, which mitigated effectively the steric restrictions to bulky molecules.…”
Section: Oxidative Desulfurization Over Ti-mcm-56mentioning
confidence: 99%