Magnetic CoFe2O4/Graphene oxide nanocomposite for highly efficient separation of f-block elements

Iodine‐Functionalized Magnetic Reduced Graphene Oxide as an Efficient Nanocatalyst for Acetylation of Phenol, Alcohol, and Sugar Derivatives

“…Secondary weight loss was also observed at 175-213 °C, corresponding to the decomposition of the unstable oxygen-containing functional groups for ChemistrySelect reduced graphene oxide layers and iodine groups immobilized on its surface, which in total, at the end of this stage about 17.5 % of the nanocomposite mass is lost. [22,25,29] These two steps of weight loss in GO@CoFe 2 O 4 nanocomposite were 3 % and 6 %, at temperatures of 25-110 °C and 225-315 °C, respectively. Weight loss up to 315 °C in I@rGO@CoFe 2 O 4 is about 8 % higher than in GO@CoFe 2 O 4 .…”

“…The thermogram shows an initial weight loss in I@rGO@CoFe 2 O 4 nanocomposite at a temperature of 25–110 °C which can be attributed to the loss of residual water adsorbed on the catalyst. Secondary weight loss was also observed at 175–213 °C, corresponding to the decomposition of the unstable oxygen‐containing functional groups for reduced graphene oxide layers and iodine groups immobilized on its surface, which in total, at the end of this stage about 17.5 % of the nanocomposite mass is lost [22,25,29] . These two steps of weight loss in GO@CoFe 2 O 4 nanocomposite were 3 % and 6 %, at temperatures of 25–110 °C and 225–315 °C, respectively.…”

“…In comparison with the pristine GO, all of the bands drifted to lower wavenumbers due to the interaction of CoFe 2 O 4 with the GO nanosheets (Figure 1b). [25] In the FT‐IR spectrum of I@rGO@CoFe 2 O 4 , the band of C=O disappeared due to the reduction of graphene oxide by iodine. A band at 592 cm −1 was detected, which was attributed to stretching vibration of (C−I) and metal‐oxygen bond [22] .…”

The application of food/agro-waste and spent household products for the environmentally benign separation of thorium

“…The Dubinin–Radushkevich (D–R) isotherm model is represented by three types: H-, L-, and S-shaped curves. The model can be expressed using the following expression: 58 ln q e = ln x m + βε 2 where x m signifies the sorption capacity of a D–R monolayer, ε is the Dubinin–Radushkevich isotherm constant, and β is associated with the sorption energy as follows:…”

“…The Dubinin-Radushkevich (D-R) isotherm model is represented by three types: H-, L-, and S-shaped curves. The model can be expressed using the following expression: 58 ln q e ¼ ln x m + b3 2 (4)…”