Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 7, Issue 21, Pages 5136-5146Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cy01647f
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Funding
- National Natural Science Foundation of China [21606087, 21436005, 21576095]
- Fundamental Research Funds for the Central Universities [2017MS069, 2017MS088, 2017PY004]
- NSFC program [21376135, 91434122, 51236004]
- Guangdong Natural Science Foundation [2014A030310445, 2016A030310413, 2016A050502004]
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We reported a general seed-induced strategy for the synthesis of both meso/macroporous ZSM-5 and ZSM-11 (denoted as N-ZSM-5 and N-ZSM-11, respectively) under additive-free, low template/SiO2 ratio (from 0.011 to 0.0014) and seed-assisted hydrothermal conditions. It was found that both N-ZSM-5 and N-ZSM-11 were primarily composed of 20-50 nm oriented nanorods, which showed excellent physicochemical properties, such as high crystallinity, large surface area, auxiliary meso/macroporous structures, and uniform size. When being used in the methanol-to-aromatics reaction (MTA), both Zn/N-ZSM-5 and Zn/N-ZSM-11 exhibited high catalytic efficiencies, as reflected by their far longer lifetimes and higher selectivities for total aromatics than conventional Zn/ZSM-5 and Zn/ZSM-11, due to their unique meso/macroporous structure and ultra-small crystal size that resulted in substantial improvements in the mass-transport properties. This seed-induced strategy inspires new ideas for the design and fabrication of oriented nanorod-assembled hierarchical zeolites with lower cost and good catalytic performance.
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