浙江师范大学代伟研究组发现成功构建空腔型锌基金属有机框架以增强对噻吩硫的捕获能力。相关论文发表在2025年3月5日出版的《颗粒学报》杂志上。

因此，研究组采用自组装水热法构建了一种新型空心型Zn-BTC（HZB）吸附剂，无需主题掺杂模板剂。扫描电镜可以看到一个大的内腔的存在。批量试验结果表明，空心结构Zn-BTC具有较高的吸硫能力和较快的扩散速率。吸附等温线与Freundlich模型和Dubinin-Radthemhkevich（D-R）模型吻合较好，表明多层吸附结合了孔隙填充效应。TSMs的最大吸附容量在30 min内可达到80%，符合准二级吸附动力学模型。吸附机理包括孔填充、配体效应和π-π吸引。此外，HZB-3在第五次循环后仍保持良好的吸附能力，表现出良好的再热性和稳定性。本工作为TMS捕获主题化空心MOF提供了一种新的策略。

据悉，传统的金属有机骨架具有开放的金属位点、结构多样性和高比表面积等优点，在吸附脱硫方面具有潜在的应用前景。然而，内部狭窄的孔隙限制了噻吩硫分子（TSM）的吸附和扩散。

附：英文原文

Title: Well-construction of hollow-pocket shaped Zn-based metal-organic framework for boosting the capture ability towards thiophene sulfur

Author: Wei Dai a

Issue&Volume: 2025/03/05

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.

DOI: 10.1016/j.partic.2025.02.017

Source: https://www.sciencedirect.com/science/article/abs/pii/S1674200125000537