文献类型：期刊文献

英文题名：Coordination-Enhanced Synthesis for Hollow Mesoporous Silica Nanoreactors

作者：Li, Kaijie[1];Yang, Caoping[1];Yu, Hongbo[2];Xiao, Tao[1];Guan, Wenjun[1];Ding, Peng[1];Yin, Hongfeng[2];Stuart, Martien Abraham Cohen[1];Wang, Junyou[1];Zhou, Shenghu[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

年份：2020

卷号：32

期号：5

起止页码：2086

外文期刊名：CHEMISTRY OF MATERIALS

收录：;EI(收录号：20201008265781);WOS:【SCI-EXPANDED(收录号:WOS:000519337600035)】；

基金：S.Z. and H.Y. thank the National Natural Science Foundation of China for financial supports (Grant Nos. 21776090 and 21571183), and this work was also partially supported by Industrial R&D Foundation of Ningbo (Grant No. 2017B10040) and Natural Science Foundation of Shanghai (Grant No. 17ZR1440500). The authors thank Yuewu Zeng and Tulai Sun at Center for Electron Microscopy, Zhejiang University, for the help in HAADF-STEM with EDS line scans.

语种：英文

外文关键词：Coordination reactions - Catalyst activity - Metal nanoparticles - Synthesis (chemical) - Silica - Micelles - Metals - Nanoreactors

摘要：Recent progress has put the spotlight on functional nanoparticles encapsulated inside hollow silica nanospheres as so-called catalytic nanoreactors for various reactions. However, the synthetic methods used so far vary from one nanoparticle system to another, not providing access to the synthesis of a large variety of such materials. Here, we report an alternative, namely, a coordination-enhanced synthesis leading to a single system, which can directly produce a vast number of different hollow mesoporous silica nanoreactors with metal or metal-oxide nanoparticles inside their cavities (M@HMSNs or MxOy@HMSNs, where M stands for the chosen metal). We have successfully used the method with more than 21 different metals (Ru, Pd, Pt, Au, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Mo, In, Sn, Ba, La, Ce, and Eu). Specifically, a triple ligand is used to coordinate the various metal ions to form a negatively charged complex three-dimensional (3-D) network, which further combines by electrostatic attraction with a positively charged/neutral diblock copolymer, to obtain metalion-bound micelles. After silica deposition, calcination, and (if required) reduction, the corresponding M@HMSNs, MxPy@HMSNs or even their bianalogues are obtained by simply varying the metal ions in the recipe. As an illustration, we show that Pd@HMSNs display greatly enhanced catalytic hydrodechlorination activity and excellent stability due to their unique structures. Hence, the design concept is very flexible and can be extended to even include multicomponent catalytic nanoparticles, which likely extends the range of applications almost beyond imagination.