Study of the adsorption capacity to Co2+, Ni2+ and Cu2+ ions of an active carbon/functionalized polyamine hybrid material

New hybrid materials based on the grafting of Pd(ii)-amino complexes on the graphitic surface of AC: preparation, structures and catalytic properties

“…12,14,15,17 The adsorption-desorption isotherms of N 2 on both hybrid materials together with these of Merck are shown in Figure 1. The pore size distributions obtained from the isotherms are collected in Figure 2.…”

“…14 Thus, once the Ar-S-F molecules are adsorbed into open pores the subsequent adsorption of metal ions by the hybrid materials AC/Ar-S-F is mainly controlled via complexation of the metal ion by the F function (Scheme 1). 12,13,[15][16][17] This provides a suitable strategy to prepare solid catalysts based on the catalytic properties of metal-ion complexes supported on the graphene surface of the AC. This method catalyst preparation has two important advantages: i) it allows the exhaustive control of the amount of active sites on the surface of the hybrid material and ii) the textural and chemical functions of the starting AC remain unaltered in the hybrid due to the soft conditions of preparation.…”

Activated carbon modifications to enhance its water treatment applications. An overview

“…Results reported show that coordinated ligand anchorage on the AC surface modifies its textural and chemical properties, although research to date has largely focused on the application of these materials for the adsorption of heavy metals. Only a few articles [117][118][119][120][121][122][123][124][125]112,[126][127][128][129] analyzed the effect of coordinated ligand anchorage on textural properties (surface area and porosity), of AC reporting a decrease in surface area and micro-and mesoporosity. The chemical modifications of AC depend on the composition of the ligand used.…”

“…The chemical modifications of AC depend on the composition of the ligand used. Studies have demonstrated that coordinated ligand anchorage on the AC surface increases surface basicity, negative charge, and N, Cl, and S contents [117][118][119][120][121][122][123][124][125]112,[126][127][128][129]. Further details on the effect of coordinated ligand functionalization of the AC surface can be found in Table 7.…”

“…The use of oxidizing agents is the most common methodology to modify AC surface , however, in general this treatment reduces the AC surface area; therefore, researchers are investigating alternative methods like (i) sulfuration [69][70][71][72][73][74][75][76][77][78][79][80][81][82][83] (ii) ammonification and/or (iii) coordinated ligand anchorage to increase activated carbon adsorption capacity [117][118][119][120][121][122][123][124][125]112,[126][127][128][129].…”