High performance UiO-66 through microwave-assisted and Cr doping for adsorption heat storage applications.

Authors

Guodong Fu, Ping Wu, Jinguang Yang, Shang Liu, Shiping Zhang, Xiulan Huai

Published in

RSC advances. Volume 15. Issue 34. Pages 27661-27667. Aug 01, 2025. Epub Aug 04, 2025.

Abstract

The metal-organic framework UiO-66 is a promising water vapor adsorbent due to its stability and hydrophilicity. In this study, we systematically investigated the modulation of pore structure and water adsorption performance of UiO-66 through microwave-assisted synthesis and controlled Cr³⁺ doping. The results indicated that the crystalline integrity and thermal stability of the framework remained well-preserved after doping. The UiO-66 samples with Cr³⁺ addition have higher pore volume and specific surface area. When the mole ratio of Cr to Zr is 1.5, the micropore volume and BET specific surface area of MW-1.5Cr-UiO-66 are 15.1% and 19.8% higher than MW-UiO-66. This structural optimization resulted in superior adsorption performance, with the saturated water adsorption capacity of MW-1.5Cr-UiO-66 reaching 0.59 g g^-1. Furthermore, the water adsorption capacity of MW-1.5Cr-UiO-66 remained unchanged after 10 cycles. The coordinated modulation of pore architecture and surface chemistry through transition metal doping provides new insights for developing high-performance adsorbents in adsorption heat storage applications.

PMID:
40761914
Bibliographic data and abstract were imported from PubMed on 05 Aug 2025.

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