A Generic Method for Preparing Hollow Mesoporous Silica Catalytic Nanoreactors with Metal Oxide Nanoparticles inside Their Cavities

作者：Li, Kaijie; Wei, Jinxia; Yu, Hongbo; Xu, Pengyao; Wang, Jiahua; Yin, Hongfeng; Stuart, Martien A. Cohen; Wang, Junyou^*; Zhou, Shenghu^*

来源：Angewandte Chemie International Edition, 2018, 57(50): 16458-16463.

DOI：10.1002/anie.201810777

• dye degradation
• heterogeneous catalysis
• mesoporous materials
• nanoreactors
• transition-metal oxides

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.

• 出版日期2018-12-10
• 单位化学工程联合国家重点实验室; 中国科学院; 中国科学院宁波材料技术与工程研究所; 华东理工大学