Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 50, Pages 16458-16463Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201810777
Keywords
dye degradation; heterogeneous catalysis; mesoporous materials; nanoreactors; transition-metal oxides
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Funding
- Ningbo Municipal Science and Technology Innovative Research Team [2014B81004, 2016B10005]
- Natural Science Foundation of Shanghai [17ZR1440500]
- National Natural Science Foundation of China [21776090, 21571183]
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We report a facile and generic method for the synthesis of hollow mesoporous silica nanoreactors (HMSNs) with small-sized metal oxide nanoparticles (NPs) inside their cavities. They were made by deposition of silica onto metal-containing charge-driven polymer micelles and subsequent calcination. The micelles consist of 1)negatively charged supramolecular polyelectrolyte chains of bis-ligand-bound metal ions, and 2)water-soluble, neutral/positive diblock copolymers. Owing to the facile coordination between transition-metal ion and the employed bidentate ligand, a series of HMSNs with <2nm MxOy NPs inside cavities (M=Mn, Co, Ni, Cu, or Zn) were obtained by simply varying the metal ions inside the micelles. The developed method circumvents the pre- and post-synthesis of metal oxide NPs; after calcination, hollow mesoporous nanostructures containing small-sized metal oxide NPs inside their cavities are directly obtained. The CoxOy-functionalized HMSNs catalyze the degradation of various dyes with H2O2.
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