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A Generic Method for Preparing Hollow Mesoporous Silica Catalytic Nanoreactors with Metal Oxide Nanoparticles inside Their Cavities
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-11-15 , DOI: 10.1002/anie.201810777
Kaijie Li 1 , Jinxia Wei 1 , Hongbo Yu 1 , Pengyao Xu 1 , Jiahua Wang 1 , Hongfeng Yin 2 , Martien A. Cohen Stuart 1 , Junyou Wang 1 , Shenghu Zhou 1
Affiliation  

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 <2 nm 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.

中文翻译:

腔内金属氧化物纳米粒子制备空心介孔二氧化硅催化纳米反应器的通用方法

我们报告了一种简便而通用的方法,用于在空腔内合成中空介孔二氧化硅纳米反应器(HMSNs)和小型金属氧化物纳米粒子(NPs)。它们是通过将二氧化硅沉积到含金属的电荷驱动的聚合物胶束上并随后煅烧而制成的。胶束由1)双配体结合的金属离子带负电的超分子聚电解质链和2)水溶性,中性/正性二嵌段共聚物组成。由于过渡金属离子与所用的双齿配体之间的协调作用,一系列具有<2 nm M x O y的HMSN通过简单地改变胶束内部的金属离子,可以得到腔体内的NP(M = Mn,Co,Ni,Cu或Zn)。所开发的方法规避了金属氧化物NP的合成前和合成后的过程。煅烧后,可直接获得在其腔体内包含小型金属氧化物NP的中空介孔纳米结构。Co x O y功能化的HMSN催化H 2 O 2降解各种染料。
更新日期:2018-11-15
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