澄清溶液法制备钠 A 分子筛晶体

Synthesis of Na-A Zeolite in a Clear Solution

摘要

利用 [SiO₂(OH)₂]^2- 和 [Al(OH)₄]^- 极易发生缩合反应,而 [Al(OH)₄]^- 和 [Al(OH)₄]^- 不发生缩合反应的特性,将[SiO₂(OH)₂]^2- 处于含有大量[Al(OH)₄]^- 的溶液中,使其发生类似有机化学反应中封端效应的封端反应,尽管溶液中含有大量类似 [Si(O—Al—(OH)₃)₄]^4- 的离子基团,却无法发生进一步的缩合反应,由于该类离子基团无法进一步长大生成沉淀,因此可制备用于合成钠 A 分子筛晶体的澄清反应溶液.利用这种澄清的反应溶液体系,可在玻璃以及多孔氧化铝陶瓷管等基体上制备出质量优良的钠 A 分子筛晶体薄膜.

Abstract

Here it is reported that Na-A zeolite can be synthesized by a clear solution. This synthesis method is based on the fact that the condensation reaction of [SiO₂(OH)₂]^2- and [Al(OH)₄]^- occurs readily, however, the condensation reaction of [Al(OH)₄]^- and [Al(OH)₄]^- does not occur. A solution can be prepared in which [SiO₂(OH)₂]^2- ions are surrounded by a large number of [Al(OH)₄]^- ions, so that the condensation reactions of [SiO₂(OH)₂]^2- and [Al(OH)₄]^- produce a large number of [Si(O—Al—(OH)₃)₄]^4- ions, but these [Si(O—Al—(OH)₃)₄]^4- ions are not condensed ulteriorly, so no sediment is formed. In this way, a clear solution is obtained for the synthesis of Na-A zeolite. A high-quality film of Na-A zeolite on the glass or on the porous alumina ceramic tube can be prepared by using this clear solution.

关键词

钠 A 分子筛 / 分子筛薄膜 / 硅铝酸盐 / 澄清溶液 / 水热合成

Key words

Na-A zeolite / zeolite film / aluminosilicate / clear solution / hydrothermal synthesis

参考文献

[1] Batool SR, Fabbiani M, Novikov A, et al. Acid Gas Valorization through a Carbonyl Sulfide (COS) Intermediate over Na-Containing FAU and LTA Zeolites[J]. Catalysis Today, 2026, 466: 115660-1-115660-10.

[2] Te Hennepe HJC, Bargeman D, Mulder MHV, et al. Zeolite-Filled Silicone Rubber Membranes: Part 1. Membrane Preparation and Pervaporation Results[J]. Journal of Membrane Science, 1987, 35: 39-55.

[3] Sano T, Kiyozumi Y, Kawamura M, et al. Preparation and Characterization of ZSM-5 Zeolite Film[J]. Zeolites, 1991, 11(8): 842-845.

[4] Sano T, Kiyozumi Y, Mizekami F, et al. Steaming of ZSM-5 Zeolite Film[J]. Zeolites, 1992, 12(2): 131-134.

[5] Yu PY, Chen Y, Li LL, et al. Nano-seeds-driven Fabrication of Ultrahigh H₂-Permeable Oriented LTA Zeolite Membrane[J]. Separation and Purification Technology, 2026, 382: 135813-1-135813-11.

[6] Zou CC, Xia YF, Yao DX, et al. Synthesis of NaA Zeolite Membranes with High Water Flux on Macroporous Si₃N₄[J]. CrystEngComm, 2026, 28(16): 2595-2604.

[7] Seliem MK, Komarneni S. Equilibrium and Kinetic Studies for Adsorption of Iron from Aqueous Solution by Synthetic Na-A Zeolites: Statistical Modeling and Optimization[J]. Microporous and Mesoporous Materials, 2016, 228: 266-274.

[8] Hernandez-Tamargo C, Kwakye-Awuah B, O’Malley AJ, et al. Mercury Exchange in Zeolites Na-A and Na-Y Studied by Classical Molecular Dynamics Simulations and Ion Exchange Experiments[J]. Microporous and Mesoporous Materials, 2021, 315: 110903-1-110903-9.

[9] Hernández PT, Hailes SMV, Parkin IP. Hydrocarbon Detection with Metal Oxide Semiconducting Gas Sensors Modified by Overlayer or Admixture of Zeolites Na-A, H-Y and H-ZSM-5[J]. Sensors and Actuators B, 2017, 242: 1281-1295.

[10] Nam T, Yasumura S, Ogura M. Comparative Study on Cs⁺ Ion-Exchange Behavior in Zeolites with Different Framework Structures and Compositional Characteristics[J]. Microporous and Mesoporous Materials, 2026, 400: 113898-1-113898-9.

[11] Yamazaki S, Tsutsumi K. Synthesis of an A-Type Zeolite Membrane on Silicon Oxide Film-Silicon, Quartz Plate and Quartz Fiber Filter[J]. Microporous Materials, 1995, 4: 205-212.

[12] Masuda T, Hara H, Kouno M, et al. Preparation of an A-Type Zeolite Film on the Surface of an Alumina Ceramic Filter[J]. Microporous Materials, 1995, 3: 565-571.

基金资助

国家自然科学基金(22571115)