Designed Construction of 2D Honeycomb Cationic MOF Materials for Selective Removal of Sulfonic Anionic Dyes

• DOI: 10.1021/acs.langmuir.3c00550
• Publication Date: 2023-04-19T15:37:50Z
• Authors: Lulu Wang; Jinmiao Wang; Ruixue Wu; Guobo Chen; Qian Gao; Feng Shao; Dongmei Zhang; Xia Zhang; Chuanbin Fan; Yuhua Fan
• Keywords: Cationic polymerization; Sulfonic acid; Thermogravimetric analysis; Powder Diffraction; Thermal Stability; Zeta potential

Various carcinogenic dyes in water bodies are difficult to degrade due their stability light and oxidants, causing extended pollution. In this study, MOF 1 ({[Co(tib)2]·(H2O)2·SO4}n) 2 ({[Cu(tib)2]·(H2O)2·SO4}n) (tib = 1,3,5-tirs(1-imidazolyl)benzene) were synthesized by the solvothermal method. MOFs successfully characterized single-crystal X-ray diffraction (XRD) powder (PXRD). Based on structural characteristics of 2, we designed two cationic material skeletons, namely, I II ([Co(tib)22+]n [Cu(tib)22+]n), which obtained calcination combination with thermogravimetric curve remove free components lattice. As expected, showed an excellent adsorption effect sulfonic anionic dyes. Notably, capacity can reach 2922.8 mg g-1 for Congo Red (CR) at room temperature (RT). The process fits pseudo-second-order kinetic model Freundlich isotherm model. Moreover, zeta potential tests quantum chemical calculations indicate that electrostatic interactions hydrogen bond between hydroxyl group acid N atom imidazole ring mainly promote CR I. revealed as a promising novel hazardous organic aromatic pollutants high efficiency future endeavors.