Investigation on the uptake and release ability of β-cyclodextrin functionalized Fe 3 O 4 magnetic nanoparticles by methylene blue

Magnetic material based on mesostructured silica functionalized with β-cyclodextrin to extract opium alkaloids in poppy seed infusions

“…For this purpose, the 𝛽-CD is reacted with 3isocyanatopropyltriethoxysilane with a 1:3 stoichiometry [42] . However, the reaction medium used in different works to prepare del monomer is different, in DMF [42] , in pyridine [ 43 , 44 ] and in toluene [45] . Therefore, a previous study was carried out to synthetise to monomer with each of the three solvents to determine the most efficient one.…”

Novel Fe3O4 Nanoparticle/β-Cyclodextrin-Based Polymer Composites for the Removal of Methylene Blue from Water

“…This phenomenon proved that the mechanism of MB adsorption process by the 0.6FeCT-0.96β-CD originated from a monolayer adsorption, which was similar to the other reported β-CD-based absorbents. 20,22 Moreover, the adsorption isotherm of the 0.6FeCT-0.96β-CD for the MB were also studied by the Tempkin model, the Dubinin−Radushkevich model, the Harkins-Jura model, the Halsey model, and the Elovich model, which exhibited the relatively low R 2 values, in comparison with that of the Langmuir model (see Figure S8 in the Supporting Information).…”

“…The influence of the pH on the MB adsorption behavior by the 0.6FeCT-0.96β-CD was similar to the other reported β-CD-based absorbents. 21,22 This could be mainly attributed to the competition between the positive H + and the protonated MB containing two positive charges in the electrostatic attraction with the negative 0.6FeCT-0.96β-CD especially at low pH value range, because there were many H + in the MB aqueous solution. 15 The competition ability of H + became weakened as the pH increased, leading to an increment of the MB adsorption capacity for 0.6FeCT-0.96β-CD.…”

“…21 Fe 3 O 4 nanoparticles coated with the β-CD via a very complex approach, but with a relatively low maximum MB adsorption capacity of only 78 mg/g. 22 Therefore, it is still necessary to design a high-efficiency reusable β-CD-based absorbents, especially for the cationic dyes. In our previous work, we prepared a cross-linked β-CDbased absorbent with good absorption ability for cationic dyes originating from its triple absorptive functions, including nanoporous network capture, inclusion complexation, and electrostatic attraction.…”

“…Badruddoza et al reported that the maximum adsorption capacities of the Fe 3 O 4 nanoparticles modified with the carboxymethyl β-CD by physical and chemical strategies were 278 and 141 mg/g, respectively . Zhou et al fabricated the core–shell-structured Fe 3 O 4 nanoparticles coated with the β-CD via a very complex approach, but with a relatively low maximum MB adsorption capacity of only 78 mg/g …”