4.6 Article

Efficient adsorptive removal of dibenzothiophene from model fuels by encapsulated of Cu+ and phosphotungstic acid (PTA) in Co-MOF

期刊

JOURNAL OF SOLID STATE CHEMISTRY
卷 321, 期 -, 页码 -

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2023.123845

关键词

Adsorption desulfurization; Dibenzothiophene; Phosphotungstic acid; Metal-organic frameworks; Cuprous oxide

向作者/读者索取更多资源

In this study, Cu+ and phosphotungstic acid (PTA) were introduced into Co-MOF to prepare Co-MOF-Cu+/PTA through post-modification method. The Co-MOF-Cu+/PTA showed significantly enhanced adsorption capacity for dibenzothiophene (DBT) compared to Co-MOF. The introduction of Cu+ served as active sites for pi-pi interaction and sulfur-metal (S-M) adsorption, while Co2+ and PTA adsorbed DBT through acid-base interaction. The Co-MOF-Cu+/PTA exhibited spontaneous and endothermic adsorption behavior, with excellent selectivity and regeneration performance.
Co-containing materials have raised much concern in adsorption desulfurization due to its unsaturated metal sites. Herein, we introduced Cu+ and phosphotungstic acid (PTA) to Co-MOF to prepare Co-MOF-Cu+/PTA through post-modification method under mild condition, and then Co-MOF-Cu+/PTA were used for adsorption and removal dibenzothiophene (DBT) from model fuels. The physico-chemical property of adsorbents was characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), NH3-temperature programmed desorption (NH3-TPD), and inductively coupled plasma mass spectrometry (ICP-MS). The ICP-MS and EDX characterization results showed that Cu+ had been uniformly dispersed on the Co-MOF-Cu+/PTA. The NH3-TPD demonstrated that the PTA could enhance surface acidity of the Co-MOF-Cu+/PTA. Due to the introduction of Cu+ and PTA, the adsorption capacity of the Co-MOF-Cu+/PTA for DBT was much greater than Co-MOF. The Cu+ ions served as active sites for pi-pi interaction and sulfur-metal (S-M) adsorption, meanwhile the Co2+ and PTA adsorbed DBT through acid-base interaction. The adsorption capacity of Co-MOF-Cu+/PTA for DBT could reach 188.7 mg/g. The adsorption behavior was spontaneous and endothermic, and be well fitted by Langmuir isotherm and pseudo-second-order kinetic. The Co-MOF-Cu+/PTA had excellent selectivity and regeneration performance.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据