A General Route to Flame Aerosol Synthesis and In Situ Functionalization of Mesoporous Silica

Mesoporous silica is a versatile material for energy, environmental, and medical applications. Here, for the first time, we report a flame aerosol synthesis method for a class of mesoporous silica with hollow structure and specific surface area exceeding 1000 m2 g−1. We show its superior performance...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2022-08, Vol.61 (35), p.e202206870-n/a
Main Authors: Liu, Shuo, Dun, Chaochao, Chen, Junjie, Rao, Satyarit, Shah, Mihir, Wei, Jilun, Chen, Kaiwen, Xuan, Zhengxi, Kyriakidou, Eleni A., Urban, Jeffrey J., Swihart, Mark T.
Format: Article
Language:English
Subjects:
Aerosols
Aluminum oxide
Carbon dioxide
Catalysts
Chromium trioxide
Drug carriers
Drug delivery
Flame Aerosol Process
In Situ Functionalization
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Mesoporous Silica
Metal oxides
Methane
Methane Reforming
Nanoclusters
Noble metals
Reforming
Silica
Silicon dioxide
Synthesis
Thermal insulation
Transition metals
Water purification
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Summary:Mesoporous silica is a versatile material for energy, environmental, and medical applications. Here, for the first time, we report a flame aerosol synthesis method for a class of mesoporous silica with hollow structure and specific surface area exceeding 1000 m2 g−1. We show its superior performance in water purification, as a drug carrier, and in thermal insulation. Moreover, we propose a general route to produce mesoporous nanoshell‐supported nanocatalysts by in situ decoration with active nanoclusters, including noble metal (Pt/SiO2), transition metal (Ni/SiO2), metal oxide (CrO3/SiO2), and alumina support (Co/Al2O3). As a prototypical application, we perform dry reforming of methane using Ni/SiO2, achieving constant 97 % CH4 and CO2 conversions for more than 200 hours, dramatically outperforming an MCM‐41 supported Ni catalyst. This work provides a scalable strategy to produce mesoporous nanoshells and proposes an in situ functionalization mechanism to design and produce flexible catalysts for many reactions. A continuous flame aerosol route to synthesize hollow structured mesoporous silica nanoparticles is presented, and a general in situ functionalization mechanism for loading highly dispersed catalytically active sites is proposed. Multiple applications are addressed in this class of material, including heterogeneous catalysis, dye adsorption, drug delivery, and thermal insulation.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202206870