title: New Composites LnBDC@AC and CB[6]@AC: From Design toward Selective Adsorption of Methylene Blue or Methyl Orange.
abstract: New porous composites LnBDC@AC (AC = Activated carbon, Ln = Eu and Gd and BDC = 1,4-benzenedicaboxylate) and CB[6]@AC (CB[6] = Cucurbit[6]uril) were obtained using hydrothermal route. The LnBDC and CB[B] are located inside the pore of the carbon materials as was observed in SEM-EDS, XRPD and FT-IR analysis. Porosimetry analysis showed values typically between AC and LnBDC material, with pore size and surface area, respectively, 29,56 Å and 353.98 m2g-1 for LnBDC@AC and 35,53 Å and 353.98 m2g-1 for CB[6]@AC. Both materials showed good absorptive capacity of metil orange (MO) and methylene blue (MB) with selectivity as a function of pH. For acid pH, both materials present selectivity by MB and alkaline pH for MO, with notable performance for CB[6]@AC. Additionally, europium luminescence was used as structural probe to investigate the coordination environment of Eu3+ ions in the EuBDC@AC composite after adsorption experiment.
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: Guilherme de C
authors.initials: GC
authors.lastname: Santos
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: Amanda L
authors.initials: AL
authors.lastname: Barros
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: Carlos A F
authors.initials: CA
authors.lastname: de Oliveira
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: Leonis L
authors.initials: LL
authors.lastname: da Luz
authors.affiliation: Departamento de Química, Universidade Federal da Paraíba, João Pessoa, Paraíba, Brazil.
authors.forename: Fausthon F
authors.initials: FF
authors.lastname: da Silva
authors.affiliation: Departamento de Química, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil.
authors.forename: Grégoire J-F
authors.initials: GJ
authors.lastname: Demets
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: Severino
authors.initials: S
authors.lastname: Alves Júnior
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D033362:Powder Diffraction; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties
chemical_list: D001391:Azo Compounds; C100258:methyl orange; D008751:Methylene Blue