Graphene oxide–tannic acid nanocomposite as an efficient adsorbent for the removal of malachite green from water samples

Al-Kinani, Alaa; Gheibi, Mohammad; Eftekhari, Mohammad

doi:10.1007/s40808-019-00612-z

Cited by 28 publications

(2 citation statements)

References 24 publications

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“…Three characteristic absorption peaks of malachite green are observed at 1517, 1346, and 1153 cm –1 , corresponding to the benzene ring skeleton, the Ar–N bond, and the C–Ar bond telescoping vibration, respectively. These peaks are red-shifted compared to those of pure-phase MG, indicating chemical adsorption between malachite green and the adsorbent, which is consistent with the kinetic fitting results …”

Section: Resultssupporting

confidence: 87%

“…These peaks are red-shifted compared to those of pure-phase MG, indicating chemical adsorption between malachite green and the adsorbent, which is consistent with the kinetic fitting results. 48 The main adsorption mechanism of ZDGA8 for MG can be summarized as follows: first, owing to the negative charge on the surface of graphene oxide (GO), it exhibits a high adsorption affinity with the cationic dye MG through electrostatic interactions. 15,16 Second, the ZDGA8 aerogel has a three-dimensional interconnected honeycomb pore structure, which allows MG molecules to freely diffuse inside the aerogel and adsorb by pore filling.…”

Section: Effect Of Physical and Chemical Parameters On Dye Adsorption...mentioning

confidence: 99%

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rGO/ZIF-8 Aerogel for Effective Removal of Malachite Green from Wastewater

Li,

Liu,

Gao

et al. 2024

Langmuir

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In this study, dopamine-modified graphene aerogel (DGA) is synthesized through a one-step hydrothermal method using graphene oxide as the precursor and dopamine as the reducing agent. Subsequently, in situ immersion synthesis is conducted to obtain ZIF-8 loaded on a dopamine-modified graphene aerogel skeleton (ZDGA), featuring a regular honeycomb interconnected mesoporosity and a high specific surface area of 532.8 m2/g. The synthesized ZDGA exhibited exceptional adsorption performance for the cationic dye malachite green. At room temperature, ZDGA achieved an impressive equilibrium adsorption capacity of 6578.34 mg/g. The adsorption process followed pseudo-secondary kinetics and adhered to the Langmuir model, indicating chemically dominated adsorption on a monomolecular layer. Intraparticle diffusion was the primary rate determinant, with π–π stacking, electrostatic adsorption, hydrogen bonding, and Lewis acid–base interactions serving as the key driving forces. It has an ideal specific surface area and good cycling performance, which highlights its potential application in dye wastewater treatment.

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Section: Resultssupporting

confidence: 87%