Interfacial growth of metal-organic framework on carboxyl-functionalized carbon nanotubes for efficient dye adsorption and separation

Xinxin Sang; Qijun Zha; Xiangdao Nie; Dongyin Liu; Yansong Guo; Xianbin Shi; Caihua Ni

doi:10.1039/d0ay01249a

Interfacial growth of metal-organic framework on carboxyl-functionalized carbon nanotubes for efficient dye adsorption and separation

Anal Methods. 2020 Oct 7;12(37):4534-4540. doi: 10.1039/d0ay01249a. Epub 2020 Sep 3.

Authors

Xinxin Sang¹, Qijun Zha, Xiangdao Nie, Dongyin Liu, Yansong Guo, Xianbin Shi, Caihua Ni

Affiliation

¹ The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China. [email protected] [email protected].

PMID: 33001062
DOI: 10.1039/d0ay01249a

Abstract

Hybrid nanocomposites based on UiO-66-NH₂ and carboxyl-functionalized carbon nanotubes were developed in this study via different synthetic pathways. Combining them through interfacial in situ growth was beneficial for the better dispersity of UiO-66-NH₂ in the CNTs@UiO-66-NH₂ composite than physically mixing CNTs/UiO-66-NH₂ and chemically bonded CNTs-CONH-UiO-66. Coordination between carboxyl groups of CNTs and zirconium ions resulted in the interfacial growth of UiO-66-NH₂ on CNTs. Adsorption experiments showed that CNTs@UiO-66-NH₂ exhibited the highest adsorption efficiency towards methyl orange (MO). The adsorption capacity of CNTs@UiO-66-NH₂ was up to 392 mg g^-1, which was 77.45% and 201.5% higher than those of CNTs-CONH-UiO-66 and CNTs/UiO-66-NH₂ respectively. Moreover, CNTs@UiO-66-NH₂ could selectively adsorb MO from the MO/MB mixture.

Publication types

Research Support, Non-U.S. Gov't