title: Targeted Synthesis of Ultrastable High-Silica RHO Zeolite Through Alkali Metal-Crown Ether Interaction.
abstract: High-silica RHO zeolite was directly synthesized using an alkali metal-crown ether (AMCE) complex as organic structure-directing agent (OSDA). Derived from the UV-vis spectra and zeolite patterns, the crown ether-cesium cation interaction was found to have crucial effect on the enhancement of silica content within the zeolite framework. The synthesized RHO zeolites possess up to four times larger silica/alumina ratio (SAR) values than that in their conventional form, which gives them extraordinarily rigid frameworks even after hydrothermal aging under 800 °C. Compared to commercial zeolites, copper-exchanged high-silica RHO zeolites demonstrate considerably high reaction activity in NOXremoval, making them promising candidates for diesel exhaust treatment.
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.|University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P.R. China.
authors.forename: Quanli
authors.initials: Q
authors.lastname: Ke
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.
authors.forename: Tianjun
authors.initials: T
authors.lastname: Sun
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.
authors.forename: Hao
authors.initials: H
authors.lastname: Cheng
authors.affiliation: Department of Electronics, Nankai University, 94 Weijin Road, Tianjin, 300071, P.R. China.
authors.forename: Haijun
authors.initials: H
authors.lastname: Chen
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.|University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P.R. China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Liu
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.|University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, P.R. China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Wei
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.
authors.forename: Shudong
authors.initials: S
authors.lastname: Wang
keywords: NOx removal; alkali metals; crown ether; ultrastable; zeolites