Facile Synthesis of Ultramicroporous Organic‐Linked Zincophosphate with High Thermal, Chemical and Water Stabilities
Journal
Chemistry – A European Journal
Journal Volume
31
Journal Issue
23
ISSN
0947-6539
1521-3765
Date Issued
2025-04-22
Author(s)
Ling‐I Hung
Souvik Pal
Ting‐Ting Hsu
Shih‐Ting Tseng
Tai‐Lin Wu
Pamela Berilyn So
Yu‐Tzu Chang
Sue‐Lein Wang
Yao‐Ting Wang
Teng‐Hao Chen
Chen‐Wei Chan
Hsin‐Tsung Chen
Chia‐Her Lin
Abstract
The application of ultramicroporous materials for CO2 separation is limited by the rarity of materials exhibiting stability and rapid scale-up characteristics. In this study, we propose a rational approach to enhance the structural stability and durability of the pillared layer structure. Through the topotactic replacement of protons with metal ions in the parent 4,4′-bipyridine (bpy)-pillared zincophosphate, we observed the formation of edge-sharing dimers of ZnO4N and PO4, as well as the insertion of (VOH2O)2+ into the zinc phosphate layers. This resulted in the modified bpy-pillared bimetal phosphate, [(VOH2O)(ZnPO4)2(bpy)]⋅4H2O (denoted as NTHU-16 or VZn-bpy-w), which exhibits exceptional structural stability in a wide pH range (pH 2-12) and boiling water. Additionally, a rapid scale-up process reduced the synthesis time of VZn-bpy-w from 48 hours to just 3 hours, significantly increasing efficiency. The vanadyl groups, with easily displaced coordinated water, enhance the strength of the inorganic sheets and create available metal sites for the adsorption and separation of CO2. This combined strategy of structural enhancement and rapid synthesis offers a new pathway for engineering stable, porous metal phosphates and designing novel organic-inorganic hybrid materials with potential applications in CO2 separation.
Subjects
CO2 separation
mixed-matrix membrane
scale-up
ultramicroporous
zincophosphate
SDGs
Publisher
Wiley
Type
journal article