Insights into the Effect of the Adsorption Preference of Additives on the Anisotropic Growth of ZSM‐5 Zeolite. Issue 58 (26th September 2022)

• Record Type: Journal Article
• Authors: Shi, Jing; Du, Yujue; He, Wanren; Zhao, Guoliang; Qin, Yucai; Song, Lijuan; Hu, Jun; Guan, Yong; Zhu, Junfa; Wang, Chuanming; Teng, Jiawei; Xie, Zaiku
• Is Part Of: Chemistry. Volume 28:Issue 58(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-26
• Subjects: adsorption preference -- anisotropic growth -- crystallization -- morphology -- zeolites; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202201781
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Zeolite morphology plays a crucial role in affecting catalytic performance, while is persistently challenging to tailor through crystal anisotropic growth. It has been recognized that specific additives can be introduced into the synthesis of zeolites to achieve anisotropic growth, however their role and the underlying mechanism are not well understood. Herein, the effect of eight specific additives on the anisotropic growth of the ZSM‐5 zeolite is unveiled within the framework of crystallization engineering. Either an inhibition effect or a promotion effect is revealed for each additive according to the crystallization kinetics. The adsorption preference of typical additives on different surfaces was demonstrated by total internal reflection fluorescence microscopy (TIRFM) and transmission X‐ray microscopy (TXM) together with 3D reconstruction. The calculated adsorption energy difference between MFI [100]/[101] and [010] surfaces was proposed as a key descriptor to estimate the possible morphology induced by additive. ZSM‐5 zeolites varying from sphere‐like, plate‐like to noodle‐like morphology could be synthesized by employing specific additives with increasing adsorption strength difference on distinct surfaces. Abstract : Encouraging growth – more or less : The adsorption preference of eight additives and their role in the anisotropic growth of ZSM‐5 zeolite were investigated experimentally and theoretically. Either an inhibition or a promotion effect is revealed by these additives. A descriptor related to the adsorption energy difference between MFI [100]/[101] and [010] surfaces was employed to estimate the ZSM‐5 morphology, which varied from sphere‐like to plate‐like to noodle‐like.