Ogino, Isao Nigra, Michael M. Hwang, Son-Jong Ha, Jeong-Myeong Rea, Thomas Zones, Stacey I. Katz, Alexander 2024-01-20T17:31:10Z 2024-01-20T17:31:10Z 2021-09-01 2011-03-16 0002-7863 https://pubs.kist.re.kr/handle/201004/130530 New material UCB-1 is synthesized via the delamination of zeolite precursor MCM-22 (P) at pH 9 using an aqueous solution of cetyltrimethylammonium bromide, tetrabutylammonium fluoride, and tetrabutylammonium chloride at 353 K. Characterization by powder X-ray diffraction, transmission electron microscopy, and nitrogen physisorption at 77 K indicates the same degree of delamination in UCB-1 as previously reported for delaminated zeolite precursors, which require a pH of greater than 13.5 and sonication in order to achieve exfoliation. UCB-1 consists of a high degree of structural integrity via Si-29 MAS NMR and Fourier transform infrared spectroscopies, and no detectable formation of amorphous silica phase via transmission electron microscopy. Porosimetry measurements demonstrate a lack of hysteresis in the N-2 adsorption/desorption isotherms and macroporosity in UCB-1. The new method is generalizable to a variety of Si:Al ratios and leads to delaminated zeolite precursor materials lacking amorphization. English AMER CHEMICAL SOC HIGH-SILICA ZEOLITES 5-COORDINATE SILICON CATALYTIC-ACTIVITY MCM-22 ITQ-2 SPECIFICITY ADSORPTION CORROSION SYSTEMS Delamination of Layered Zeolite Precursors under Mild Conditions: Synthesis of UCB-1 via Fluoride/Chloride Anion-Promoted Exfoliation Article 10.1021/ja111147z 1 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.133, no.10, pp.3288 - 3291 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133 10 3288 3291 scie scopus 000288410100019 2-s2.0-79952580149 Chemistry, Multidisciplinary Chemistry Article HIGH-SILICA ZEOLITES 5-COORDINATE SILICON CATALYTIC-ACTIVITY MCM-22 ITQ-2 SPECIFICITY ADSORPTION CORROSION SYSTEMS Delamination Zeolite Exfoliation Fluroide Chloride UCB-1