Title : Multi-walled carbon nanotubes decorated with Cu(II) triazole Schiff base complex and its catalytic performance for adsorptive removal of synthetic dyes
Hydroxyl functionalized Cu(II) Schiff base named N,N-bis(4 hydroxysalicylidene)-4-H-1,2,4-triazole-3,5- diamine-diaminedicopper (II) has been synthesized. Analysis of the obtained net complex supported the formation the compound in the molar ratio 1:2 [L:M] and it has the structure of [LCu2 (OAc)2 (H2 O)2 ].MeOH (Cu2 -L); where L N,N-bis(4 hydroxysalicylidene)-4-H-1,2,4-triazole-3,5-diamine ligand while the spectral results confirmed the geometry around the Cu(II) centers to be tetrahedral. The obtained complex has been supported on modified MWCNT via covalent bonds. The obtained MWCNT anchored copper complex ([Cu2 -L]@MWCNT) has been characterized by different tools including elemental analysis, fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), thermal analysis, UV–Vis spectra and X-ray diffraction which confirmed the loading of bimetallic complex on CNT. The efficiency of ([Cu¬2-L]@MWCNT) for the adsorptive removal of Sunset yellow (SY), Direct red 81 (DR-81), and acid blue 92 (AB-92) dyes from aqueous solutions has been studied under alternative experimental conditions. The experimental results have been analyzed by the Langmuir and Freundlich isotherm models. The equilibrium adsorption data fits Langmuir adsorption isotherm very well owing to the homogeneous distribution of active sites onto ([Cu2 -L]@MWCNT) surface. The experimental kinetics of the data were analyzed using pseudo-first-order, pseudo-second-order and Weber-Morris intra-particle kinetics. The adsorption process follows the second-order kinetics. The adsorption method found to be endothermic and spontaneous as appeared from thermodynamic data.
Audience Take Away:
- Synthesis of MWCNT anchored with different metal complexes.
- The characterization and structure identification of the synthesized catalyst.
- To what extent the synthesized compound is efficient in different catalytic reactions such as removal of the color from waste water.
- The kinetics of the catalytic reaction will also be analyzed and discussed to assert to assert the type of the kinetic reaction.