Highly selective epoxidation of styrene over mesoporous Au-Ti-SBA-15 via photocatalysis process: Synthesis, characterization, and catalytic application |
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Authors: | Yajie GuoLiu Zhengwang Wang Guangjian Yanhog HuangFangfang Kang |
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Institution: | School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China |
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Abstract: | 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, N2 adsorption, XPS, 29Si 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 × 103 min−1. |
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Keywords: | Au-Ti-SBA-15 Surface properties Photo-catalysis High selectivity Epoxidation |
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