Highly efficient removal of toxic organic dyes, chemical solvents and oils by mesoporous exfoliated graphite: Synthesis and mechanism

Effect of Process Parameters on the Graphite Expansion Produced by a Green Modification of the Hummers Method

“…There was mentioned that increasing EV values constitute a clear strategy to improve material performance further [ 1 ]. It is commented that oil adsorption capacity depends on not only the surface area but also the pore structure of the material since there is a strong dependence on EV and worm lengths [ 51 ]. Figure 9 shows the reached EV as a function of microwave heating time, and peroxide concentration, the samples prepared with 50% H 2 O 2 concentration achieved almost 500 mL/g (5–2); meanwhile, with 30% of peroxide concentration, the sample with the highest value was 0–1 reaching 400 mL/g, as can be seen in the Figure 9 a, the mentioned evidence suggests that samples prepared with more concentrated peroxide reach higher values compared to the lower concentration counterparts.…”

The Preparation and Characterization of MnFe2O4-Decorated Expanded Graphite for Removal of Heavy Oils from Water

“…FTIR spectroscopy was used to determine the structural interaction between expanded graphite (EG) and MnFe 2 O 4 as observed in Figure 2. For EG spectrum, the characteristic peaks located at 3441 cm −1 and 1631 cm −1 were assigned to the stretching and bending vibration of O-H groups; at 2921 and 2857 cm −1 , showed the stretching vibration of C-H in CH, CH 2 , and CH 3 ; at 2356 cm −1 , were related to CO 2 stretching vibration; at 1050 cm −1 , could be attributed to C-O-C symmetric vibration [18,19]. After decoration with MnFe 2 O 4 , some new peaks appeared at 1165 and 1121 cm −1 , which were assigned to bonded hydroxyl groups on the metal, and at 555 cm −1 , which showed intrinsic stretching vibration of Mn-O bonds characterized for octahedral manganese ferrite [20,21,22].…”

“…Figure 4A reveals N 2 adsorption/desorption isotherms of EG and EG-MnFe 2 O 4 . It can be seen that the feature hysteresis between desorption and adsorption curve of EG is characterized by the type IV, which demonstrates the presence of a moderate number of mesopores and very little micropores in vermiculate EG [18]. The decoration of MnFe 2 O 4 on graphite layers induced a little decline in the number of mesopores and micropores when the narrower isotherm features hysteresis between desorption and adsorption curve on EG-MnFe 2 O 4 .…”

Construction of naphthalene diimide-based cadmium complexes and their application in iodine adsorption, photochromism, and photocatalysis

“…6 A large amount of textile industry wastewater continues to be discharged without prior treatment, causing serious negative impacts on the environment and human health. 7–9 Nowadays, there are many treatment methods for dye wastewater, such as filtration, 10 adsorption, 11–14 gelation, 15 catalysis, 16,17 and biotechnology-based treatment technology. 18 Among the new generation of dye wastewater treatment methods, crystalline complex-based photodegradation technology, has gradually become a research hotspot due to its advantages of porosity and modifiability, which is vital for studying the mechanism of the photocatalytic process and potential industrial applications.…”