TY - JOUR
T1 - Hollow ZSM-5 with Silicon-Rich Surface, Double Shells, and Functionalized Interior with Metallic Nanoparticles and Carbon Nanotubes
AU - Dai, Chengyi
AU - Zhang, Anfeng
AU - Liu, Min
AU - Guo, Xinwen
AU - Song, Chunshan
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/12/22
Y1 - 2015/12/22
N2 - Hollow ZSM-5 single crystals with silicon-rich exterior surface are prepared by a "dissolution-recrystallization" strategy in tetrapropylammonium hydroxide solution. Selective dissolution and exterior recrystallization cause the silicon components to migrate from the inside to outside, resulting in a regular void in the interior of the crystal, increased Brönsted acid sites and a silicon-rich external surface. The as-prepared hollow ZSM-5 exhibits excellent acid catalysis with enhanced shape selectivity, as shown in biphenyl methylation as a probe reaction, which is attributed to the silicon-rich external surface and thus the inhibition of isomerization on external surface. More interestingly, hollow ZSM-5 single crystals with double shells are successfully prepared by layer-by-layer technique followed with dissolution-recrystallization strategy. Furthermore, hollow ZSM-5 encapsulating iron and carbon nanotubes are successfully synthesized.
AB - Hollow ZSM-5 single crystals with silicon-rich exterior surface are prepared by a "dissolution-recrystallization" strategy in tetrapropylammonium hydroxide solution. Selective dissolution and exterior recrystallization cause the silicon components to migrate from the inside to outside, resulting in a regular void in the interior of the crystal, increased Brönsted acid sites and a silicon-rich external surface. The as-prepared hollow ZSM-5 exhibits excellent acid catalysis with enhanced shape selectivity, as shown in biphenyl methylation as a probe reaction, which is attributed to the silicon-rich external surface and thus the inhibition of isomerization on external surface. More interestingly, hollow ZSM-5 single crystals with double shells are successfully prepared by layer-by-layer technique followed with dissolution-recrystallization strategy. Furthermore, hollow ZSM-5 encapsulating iron and carbon nanotubes are successfully synthesized.
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U2 - 10.1002/adfm.201502980
DO - 10.1002/adfm.201502980
M3 - Article
AN - SCOPUS:84947812218
SN - 1616-301X
VL - 25
SP - 7479
EP - 7487
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 48
ER -