University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea.
Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea.
Chemosphere. 2021 Jul;274:129789. doi: 10.1016/j.chemosphere.2021.129789. Epub 2021 Jan 27.
Zn-MOF/ZnO nanocomposites with different organic linkers were fabricated by a rapid ultrasonication method using freshly prepared Zn(OH) precipitate. The high metal-to-ligand ratio led to the simultaneous formation of MOFs and ZnO nanoparticles in the MOFs. The surface area was in the range of 12-21 m g. The nanocomposites were tested for HS adsorption at room temperature, where the maximum adsorption capacity of 14.2 mg g was recorded for ZnBTC/ZnO in dry conditions. The spent adsorbents were regenerated using methanol and UV irradiation as individual and combined strategies. The successive effect of methanol and UV radiation led to an increased adsorption capacity in the second cycle. The spectroscopic investigation of spent ZnBDC/ZnO confirmed the chemisorption of HS over Zn-sites via Zn-S interaction. The XPS analysis of regenerated ZnBDC/ZnO confirmed a decreased sulfur content and decreased Zn ionic character. The regeneration work in this study is one of the first attempts and could be extrapolated to well-studied Zn-MOFs like MOF-5 for the desulfurization process.
采用快速超声法，以新制备的 Zn(OH)沉淀为原料，制备了具有不同有机配体的 Zn-MOF/ZnO 纳米复合材料。高的金属与配体比导致 MOFs 和 ZnO 纳米粒子在 MOFs 中同时形成。比表面积在 12-21 m²/g 范围内。在室温下对纳米复合材料进行 HS 吸附测试，在干燥条件下，ZnBTC/ZnO 的最大吸附容量为 14.2 mg/g。使用甲醇和 UV 辐射作为单独和组合策略对用过的吸附剂进行再生。甲醇和 UV 辐射的连续作用导致在第二周期吸附容量增加。对用过的 ZnBDC/ZnO 的光谱研究证实 HS 通过 Zn-S 相互作用化学吸附在 Zn 位上。再生 ZnBDC/ZnO 的 XPS 分析证实硫含量减少和 Zn 离子特性降低。本研究中的再生工作是首次尝试之一，可以推广到 MOF-5 等研究充分的 Zn-MOF 用于脱硫过程。
