Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts
| Autor: | Jinhui Zhao, Guoxiu Wang, Hao Tian, Lizhuo Wang, Jun Huang, Hao Liu, Xinyao Wang, Gao Qing Lu, Jian Liu |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
AcademicSubjects/SCI00010 Materials Science 0703 Crop and Pasture Production 02 engineering and technology Nanoreactor mesoporous materials 010402 general chemistry 01 natural sciences photocatalytic oxidation Catalysis chemistry.chemical_compound Adsorption nanoreactors metal nanoparticles surface plasmonic resonance Bimetallic strip Multidisciplinary Cinnamyl alcohol Mesoporous silica 021001 nanoscience & nanotechnology 0104 chemical sciences Special Topic: Hierarchically Porous Materials chemistry Chemical engineering AcademicSubjects/MED00010 0210 nano-technology Selectivity Mesoporous material Research Article |
| Zdroj: | National Science Review |
| ISSN: | 2053-714X 2095-5138 |
| DOI: | 10.1093/nsr/nwaa080 |
| Popis: | It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors. Herein, we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas. The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment and an ‘adhesive-contraction’ formation mechanism is proposed. AuPt@HMZS catalysts exhibited a broader absorbance region under visible light and the adsorption edge displayed a red-shift, indicating the strong metal–metal interactions at the alloy interface. The reaction performance of the coupled Au-Pt catalysts can be tuned to achieve excellent catalytic activity in cinnamyl alcohol oxidation to cinnamic acid for 3.1 mmol g−1 with 99% selectivity. The proposed strategy to build hollow structures as multifunctional micro/nanoreactors is promising for the design of high-performance and sustainable catalysts for chemical synthesis. Taking advantage of the unique structures and spatial catalyst location, hollow-structured submicrometer-photoreactors achieve high catalytic activity and selectivity in the process of photocatalytic oxidation. |
| Databáze: | OpenAIRE |
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