TY - JOUR
T1 - Zeolites featuring 14 × 12-ring channels with unique adsorption properties
AU - Li, Shiqing
AU - Han, Lu
AU - Zhao, Zhonglin
AU - Xu, Hao
AU - Jiang, Jingang
AU - Wu, Peng
N1 - Publisher Copyright:
© the Partner Organisations.
PY - 2021/12/21
Y1 - 2021/12/21
N2 - The lamellar precursor of the FER type zeolite (PREFER) was applied to develop the interlayer expanded zeolite IEZ (interlayer-expanded zeolite)-FER (D4h) with extra-large pores through hydrothermal acid treatment-assisted molecular alkoxysilylation, using 1,3,5,7-tetramethyl cyclotetrasiloxane (D4h) as a silylating agent to interconnect neighboring zeolitic layers. The interlayer expanded structure was well preserved after calcination at 823 K, yielding a hydrophilic material denoted as IEZ-FER(D4h-B). The as-made IEZ-FER(D4h) exhibits expanded interlayer spacing along the a-axis. The 4-membered rings (4MR) exist in IEZ-FER(D4h) as the secondary structure building units, while the methyl groups therein attached result in the hydrophobic properties. The newly formed channel systems are composed of intersecting 14MR and 12MR pores along the [001] and [010] directions, respectively, which are larger than those of the conventional 3D FER. The powder XRD patterns determine that IEZ-FER(D4h) has a crystalline structure with the IMM2 space group and unit cell parameters of a = 28.0285(39) Å, b = 14.0921(6) Å, c = 7.4395(3) Å.
AB - The lamellar precursor of the FER type zeolite (PREFER) was applied to develop the interlayer expanded zeolite IEZ (interlayer-expanded zeolite)-FER (D4h) with extra-large pores through hydrothermal acid treatment-assisted molecular alkoxysilylation, using 1,3,5,7-tetramethyl cyclotetrasiloxane (D4h) as a silylating agent to interconnect neighboring zeolitic layers. The interlayer expanded structure was well preserved after calcination at 823 K, yielding a hydrophilic material denoted as IEZ-FER(D4h-B). The as-made IEZ-FER(D4h) exhibits expanded interlayer spacing along the a-axis. The 4-membered rings (4MR) exist in IEZ-FER(D4h) as the secondary structure building units, while the methyl groups therein attached result in the hydrophobic properties. The newly formed channel systems are composed of intersecting 14MR and 12MR pores along the [001] and [010] directions, respectively, which are larger than those of the conventional 3D FER. The powder XRD patterns determine that IEZ-FER(D4h) has a crystalline structure with the IMM2 space group and unit cell parameters of a = 28.0285(39) Å, b = 14.0921(6) Å, c = 7.4395(3) Å.
UR - https://www.scopus.com/pages/publications/85121152678
U2 - 10.1039/d1qi01171e
DO - 10.1039/d1qi01171e
M3 - 文章
AN - SCOPUS:85121152678
SN - 2052-1545
VL - 8
SP - 5277
EP - 5285
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
IS - 24
ER -