Preparation of Mesoporous Basic Oxides through Assembly of Monodispersed Mg-Al Layered Double Hydroxide Nanoparticles

Chemistry : a European Journal
Yuya OkaKazuyuki Kuroda

Abstract

Mesoporous basic Mg-Al mixed metal oxides (MMOs) with a high surface area and large pore size have been prepared through the assembly of monodispersed layered double hydroxide nanoparticles (LDHNPs) with block copolymer templates. The particle sizes of the LDHNPs were mainly controlled by varying the concentration of tris(hydroxymethyl)aminomethane (THAM), which was used as a surface stabilizing agent. LDHNPs and micelles of a block copolymer (Pluronic F127) were assembled to form a composite. The composites were calcined to transform them into mesoporous MMOs and to remove the templates. The Brunauer-Emmett-Teller surface areas, mesopore sizes, and pore volumes increased as a result of using the templates. Moreover, the pore sizes of the mesoporous MMOs could be controlled by using LDHNPs of different sizes. The mesoporous MMOs prepared from the LDHNPs showed much higher catalytic activity than a conventional MMO catalyst for the Knövenagel condensation of ethyl cyanoacetate with benzaldehyde. The mesoporous MMO catalyst prepared using the smallest LDHNPs, about 12 nm in size, showed the highest activity. Therefore, the use of monodispersed LDHNPs and templates is effective for preparing highly active mesoporous solid base cat...Continue Reading

References

Mar 21, 2009·Chemistry : a European Journal·Damien P DebeckerGuido Busca
Oct 5, 2010·Chemistry : a European Journal·Hidetaka TorigoeTetsuo Kozasa
Mar 17, 2011·Nature Communications·Paolo FalcaroDario Buso
Jun 24, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Madhavi N PahalagedaraSteven L Suib

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Citations

Aug 11, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Yoshiyuki KurodaKazuyuki Kuroda
Dec 1, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Tengfei LiYu-Fei Song
Dec 13, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Keisuke MuramatsuKazuyuki Kuroda
Feb 23, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Keisuke MuramatsuKazuyuki Kuroda

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