Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 3, Pages 1082-1090Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2011.09.010
Keywords
Au-Ti-SBA-15; Surface properties; Photo-catalysis; High selectivity; Epoxidation
Categories
Funding
- National Natural Foundation of China [20673042]
- National Natural Foundation of Anhui Office of Education of China [KJ2011A250]
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Highly ordered Au-Ti-SBA-15 mesoporous molecular sieves were successfully synthesized by one-pot hydrothermal synthesis in acid medium, and were characterized by XRD, UV-vis, SEM, element-mapping, HRTEM, N-2 adsorption, XPS, Si-29 MAS NMR, NH3-TPD and FT-IR. The as-prepared Au-Ti-SBA-15 samples were possessed of highly ordered mesostructures with larger pore diameter, pore volume and uniform mesopore size distribution. In the oxidation of styrene with H2O2 as the oxidant over Au-Ti-SBA-15 catalyst under photo-irradiation, reaction parameters, such as molar ratio of H2O2 to styrene, reaction time, solvent, the amount of catalyst, catalyst species, and the amount of 3% NaOH, were conditioned at length. As a result, highly selective epoxidation of styrene over catalyst was carried out perfectly for 10 min with high TOF of 4.75 x 10(3) min(-1). (C) 2011 Elsevier B.V. All rights reserved.
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