Construction of Lanthanide Magnetic Bio-Based Porous Carbon Materials with Beam and Column Structure and Its Synergistic Adsorption Performance

Biochar porous carbon material (BPCM) has extraordinaryadsorptionproperties and is being widely used in different fields around theworld. The pore structure of BPCM is liable to collapse, and mechanicalproperties are inferior; hence, the focus is on developing a new & DPRIME;powerful & DPRIME;structure of functional BPCM. Rare earth elements with characteristicf orbitals are used as pore and wall strengthening units in this work.The new & DPRIME;beam and column structure & DPRIME; BPCM was synthesizedby the aerothermal method, and then, the magnetic BPCM was prepared.The results showed that the designed synthesis route was reasonable,BPCM with a steady-state beam and column structure was attained, andthe La element played a stabilizing role in maintaining the overallBPCM. The La hybridization exhibits the characteristic of & DPRIME;thestronger column and weaker beam & DPRIME;, and the La group is the & DPRIME;column & DPRIME;to strengthen the BPCM as the & DPRIME;beam & DPRIME;. The functionalizedBPCM (lanthanum-loaded magnetic chitosan-based porous carbon materials,MCPCM@La2O2CO3) obtained exhibiteda transcendent efficient adsorption capacity with an average adsorptionrate of 6.640 mg & BULL;g(-1)& BULL;min(-1) and over 85% removal of different types of dye pollutants, whichexceeded the adsorption performance of the materials of most otherBPCMs. Ultrastructural analysis revealed that MCPCM@La2O2CO3 has a huge specific surface area of 1458.513m(2)& BULL;g(-1) and a magnetization valueof 16.560 emu & BULL;g(-1) for MCPCM@La2O2CO3. A new theoretical model for the adsorptionof MCPCM@La2O2CO3 (multiple adsorptioncoexistence equation) was established. The theoretical equations clarifythat the mechanism of pollutant removal by MCPCM@La2O2CO3 is different from the traditional adsorptionmodel, presenting a mechanism of coexistence of multiple adsorptiontypes, displaying a monolayer-multilayer adsorption mechanism,influenced by the synergistic effects of H bonding, electrostaticattraction, & pi;-& pi; conjugation, and ligand interaction.The rapid coordination of the d orbitals of La is an obvious factorin enhancing the adsorption efficiency.

Automated summary

Biochar porous carbon material (BPCM) with rare earth elements as pore and wall strengthening units was synthesized, resulting in the formation of a beam and column structure BPCM. The designed synthesis route was reasonable, and the La element played a stabilizing role in maintaining the overall structure of BPCM. The functionalized BPCM exhibited superior adsorption capacity and removal efficiency for dye pollutants.