期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 6, 页码 4438-4446出版社
AMER CHEMICAL SOC
DOI: 10.1021/am5001757
关键词
polyoxomeatalate; ionic liquid; mesoporous; triphase catalysis; oxidation of alcohols; on water
资金
- Scientific Research and Innovation Project for College Graduates of Jiangsu Province [CXZZ13_0447]
A self-assembled mesoporous polyoxometalate-based ionic hybrid catalyst [TMGHA](2.4)H0.6PW was prepared by combination of alcohol amino-tethered guanidinium ionic liquid [TMGHA]Cl with Keggin phosphotungstic acid H3PW12O40 (PW). Nitrogen sorption experiment validated the formation of mesostructure with moderate BET surface area, and scanning and transmission electron microscopy (SEM and TEM) showed a fluffy coral-shaped morphology for the hybrid. The contact angle test displayed that the hybrid owned hydrophilic-hydrophobic balanced surface that exhibited well wettability for both water and organic substrate like benzyl alcohol. Therefore, the hybrid can efficiently catalyze the water-mediated triphasic oxidation of benzyl alcohol with H2O2. During the reaction, the triphase catalytic system showed a special on water effect mainly due to the suitable mesostructure and surface wettability, thus providing some clues for the preparation of green heterogeneous catalyst.
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