کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
69282 48535 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel mesoporous silicotinphosphate molecular sieve with high anion exchange capacity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Novel mesoporous silicotinphosphate molecular sieve with high anion exchange capacity
چکیده انگلیسی

New mesoporous silicotinphosphate materials with different Si:Sn:P mole ratios have been synthesized under hydrothermal condition using the self-assembly of cationic surfactant under mild acid pHs and characterized by elemental analysis, XRD, TEM, SEM-EDS, N2 sorption, FT IR, and UV–vis diffuse reflectance measurements and ion-exchange studies. XRD and TEM results suggested a wormhole-like disordered framework in this material. N2 adsorption studies revealed that the pore diameters of different samples were 1.7–2.2 nm. FT IR and UV–vis spectroscopic studies suggested the presence of Sn–O–P, Sn–O–Si bonds and tetrahedral coordination of Sn(IV) in these novel mesoporous materials. These novel silicotinphosphate materials showed good anion-exchange capacities (2.56–0.27 mmol g−1, which correspond well with their respective Si:Sn:P mole ratios in the solid products) and catalytic activity in the liquid phase epoxidation of styrene using dilute H2O2 as oxidant.

Disordered mesoporous silico–tin–phosphate materials with different Si:Sn:P mole ratios have been synthesized under hydrothermal condition using the self-assembly of cationic surfactant under mild acid pHs and these materials showed good anion exchange capacity and catalytic activity in partial oxidation reaction. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 247, Issues 1–2, 16 March 2006, Pages 216–221
نویسندگان
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