Jump to main content
Jump to site search


A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network

Author affiliations

Abstract

In this work, a cadmium-phosphonate network was prepared based on a tetrahedral shaped tetraphosphonic acid linker. The resulting three-dimensional compound Cd4(H4L)2(phen)2(H2O)4 (1) exhibited a rapid and efficient adsorption of Congo red (CR) dye, the adsorption capacity of which reached 684 mg g−1. Furthermore, this adsorbent showed excellent structural stability and adsorptive recyclability after three times of adsorption and desorption. The absorption kinetics fitted well with the pseudo-second-order kinetic model, revealing that the adsorption of the cadmium-phosphonate compound undergoes a chemical process, where hydrogen bonding between the amide groups (from CR) and the uncoordinated phosphonate oxygen atoms of the compound plays a pivotal role.

Graphical abstract: A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Apr 2019, accepted on 05 Jun 2019 and first published on 05 Jun 2019


Article type: Paper
DOI: 10.1039/C9DT01545K
Dalton Trans., 2020, Advance Article

  •   Request permissions

    A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network

    J. Ai, H. Tian, X. Min, Z. Wang and Z. Sun, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT01545K

Search articles by author

Spotlight

Advertisements