Volume 99
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Yu, Q., Zhan, T., Xia, Z., Lu, G., Ma, N., & Dai, W. (2025). Well-construction of hollow-pocket shaped Zn-based metal-organic framework for boosting the capture ability towards thiophene sulfur. Particuology, 99, 116-127. https://doi.org/10.1016/j.partic.2025.02.017
Well-construction of hollow-pocket shaped Zn-based metal-organic framework for boosting the capture ability towards thiophene sulfur
Qiaolan Yu a, Tingting Zhan a, Zhouheng Xia a, Gaojie Lu a, Na Ma b, Wei Dai a *
a Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, China
b College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
10.1016/j.partic.2025.02.017
Volume 99, April 2025, Pages 116-127
Received 29 December 2024, Revised 18 February 2025, Accepted 19 February 2025, Available online 5 March 2025, Version of Record 12 March 2025.
E-mail: daiwei@zjnu.edu.cn

Highlights

• Hollow Zn-BTC was obtained through controlling hydrothermal reaction time.

• Hollow Zn-BTC exhibits high adsorption capacity and fast diffusion rate toward thiophene.

• Pore-filling effect significantly enhances the adsorption performance of thiophene.


Abstract

Conventional metal-organic frameworks (MOFs) have potential applications in adsorption desulfurization due to their open metal sites, structural diversity, and high specific surface area. However, the narrow internal pores limit the adsorption and diffusion of thiophene sulfur molecules (TSM). Therefore, we constructed a novel hollow-type Zn-BTC (HZB) adsorbent by a self-assembled hydrothermal method without using dopant templating agents. The presence of a large internal cavity can be seen by SEM. The results of batch tests showed that the hollow structure Zn-BTC has higher sulfur absorption capacity and faster diffusion rate. The adsorption isotherms were in good agreement with both Freundlich and Dubinin-Radushkevich (D-R) models, suggesting multilayer adsorption combined with pore-filling effect. The maximum adsorption capacity of the TSMs could reach 80% within 30 min, which enabled rapid adsorption in accordance with the pseudo-second-order kinetic model. The adsorption mechanism involves pore filling, ligand effect, and π-π attraction. In addition, HZB-3 maintained good adsorption capacity after the fifth cycle, showing good reusability and stability. This work provides a new strategy for TMS capture using hollow MOF.

Graphical abstract
Keywords
Hollow structure; MOF; Adsorption; Thiophene sulfur