@article{87a8cefb141045cfba7bca7d7abcee91,
title = "Preparation of new microporous europium silicate molecular sieve by selective leaching of alkali metal cations from europium silicate Eu-AV-9",
abstract = "Acid treatment of crystalline silicates is a facile method of creating pores for the preparation of crystalline silica-based microporous materials, but its success depends on the acid treatment conditions and both the composition and crystallinity of the starting silicates. Here, europium silicate Eu-AV-9 containing Na+, K+, and Eu3+ ions was treated with acetic acid for 1 d or 14 d to synthesize microporous silicate with high Eu loading by the selective leaching of K+ and Na+ from the silicate. The acid-treated Eu-AV-9 had both crystallinity and microporosity capable of adsorbing CO2, while the adsorption of Ar was very low. In addition, the values of both micropore volume and BET area of acid-treated samples increased when the time of acid treatment was increased. This result was attributed to the formation of structural defects caused by eliminating Eu in Eu-AV-9 over time of acid treatment.",
author = "Hiroki Noda and Masakazu Koike and Rika Sakai and Hiroaki Wada and Atsushi Shimojima and Kazuyuki Kuroda",
note = "Funding Information: The authors are grateful to Mr M. Nakano (MicrotracBEL Corp.) for CO2 and Ar adsorption-desorption measurements and Dr M. Omori and Mr Y. Shiramata (Rigaku Corporation) for the implementation and interpretation of PDF analysis. Mr S. Enomoto (Kagami Memorial Research Institute for Materials Science and Technology, Waseda University) for STEM observation and EDS mapping measurements. Dr R. Takahashi and Mr H. Yamazaki (Environmental Safety Center, Waseda University) for ICP analyses and ion chromatography, respectively, and Dr Y. Asakura, Dr T. Matsuno, Dr K. Muramatsu, Mr T. Hayashi, Mr R. Tanaka, and Mr T. Hikino (Waseda Univ.) for fruitful discussions. The results of X-ray data for Rietveld analysis and XPS data obtained by using research equipment (SmartLab and VersaProbe II: Material Characterization Central Laboratory) shared in MEXT Project for promoting public utilization of advanced research infrastructure (program for supporting construction of core facilities) Grant Number JPMXS0440500021. In addition, this work was also supported by two grants of JSPS for the Joint Research Projects-LEAD with DFG and Grant-in-Aid for JSPS Fellows (No. 18J22738). Funding Information: The authors are grateful to Mr M. Nakano (MicrotracBEL Corp.) for CO and Ar adsorption–desorption measurements and Dr M. Omori and Mr Y. Shiramata (Rigaku Corporation) for the implementation and interpretation of PDF analysis. Mr S. Enomoto (Kagami Memorial Research Institute for Materials Science and Technology, Waseda University) for STEM observation and EDS mapping measurements. Dr R. Takahashi and Mr H. Yamazaki (Environmental Safety Center, Waseda University) for ICP analyses and ion chromatography, respectively, and Dr Y. Asakura, Dr T. Matsuno, Dr K. Muramatsu, Mr T. Hayashi, Mr R. Tanaka, and Mr T. Hikino (Waseda Univ.) for fruitful discussions. The results of X-ray data for Rietveld analysis and XPS data obtained by using research equipment (SmartLab and VersaProbe II: Material Characterization Central Laboratory) shared in MEXT Project for promoting public utilization of advanced research infrastructure (program for supporting construction of core facilities) Grant Number JPMXS0440500021. In addition, this work was also supported by two grants of JSPS for the Joint Research Projects-LEAD with DFG and Grant-in-Aid for JSPS Fellows (No. 18J22738). 2 Publisher Copyright: {\textcopyright} 2022 The Royal Society of Chemistry.",
year = "2022",
month = sep,
day = "9",
doi = "10.1039/d2dt02608b",
language = "English",
volume = "51",
pages = "14945--14951",
journal = "Dalton Transactions",
issn = "1477-9226",
publisher = "Royal Society of Chemistry",
number = "39",
}