A phytic acid modified CoFe2O4 magnetic adsorbent with controllable morphology, excellent selective adsorption for dyes and ultra-strong adsorption ability for metal ions

Cai, Kai; Shen, Wei; Ren, Biying; He, Jing; Wu, Sizhu; Wang, Wei

doi:10.1016/j.cej.2017.08.009

Cited by 113 publications

(22 citation statements)

References 48 publications

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“…The most recent trend in adsorbent material science are the so-called "low-cost" or "zero-cost" materials [13][14][15]. According to the literature, plenty of low-cost materials have already been tested in wastewater decontamination by adsorbing several pollutants, such as dyes [16][17][18][19], heavy metal ions [20][21][22][23][24][25], Equations (1) [43] and (2) [44], respectively (where I 002 (counts) was the intensity of the 002 crystalline peak at 22 • and I am (counts) was the height of the minimum between the 002 and 110 crystalline peaks):…”

Section: Introductionmentioning

confidence: 99%

Basic Dye Removal with Sorption onto Low-Cost Natural Textile Fibers

2018

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Over the last several years, the trend of researchers has been to use some very low-cost materials as adsorbents. For this purpose, some already commercially used bast fibers were selected as potential adsorbent materials to remove basic dye from synthetic effluents. The adsorption of basic yellow 37 dye was studied using three different bast fibers under the names of flax, ramie, and kenaf. Their morphological structure was examined using several techniques such as scanning electron microscopy (SEM), crystallinity, X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), as well as those characterizations being a useful tool to propose a mechanism of the whole adsorption process. The adsorption evaluation was achieved by studying at first the pH (12) and temperature effects (25–55 °C). Two isotherm models (Langmuir and Freundlich) were also applied to the experimental equilibrium data revealing the superiority of ramie fibers (327, 435, and 460 mg·g−1 (25 °C) for kenaf, flax, and ramie, respectively). The crucial adsorbent’s dosage was found to be 0.1 g per litre for all fibers, while the completed desorption study (eluant’s pH and reuse cycles) also confirmed the strong potential of these kinds of fibers as adsorbents. The latter may be attributed to the cellulosic content.

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Section: Introductionmentioning

confidence: 99%

Basic Dye Removal with Sorption onto Low-Cost Natural Textile Fibers

2018

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“…In comparison, these peaks seem to be disappeared, indicating the formation of -NH3 + O and some new absorption peaks appeared in g-C3N4/PAZn [14]. The absorption peaks at 1404, 1253 and 1146 cm −1 were associated to the stretching vibration of C-O, P=O and P-O bonds, respectively [20]. Moreover, the characteristic bands of Zn salt were detected at 550 cm −1 [21].…”

Section: Characterization Of G-c 3 N 4 /Paznmentioning

confidence: 95%

Core-Shell Graphitic Carbon Nitride/Zinc Phytate as a Novel Efficient Flame Retardant for Fire Safety and Smoke Suppression in Epoxy Resin

Zhang

Meng

et al. 2020

Polymers

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Novel core-shell graphitic carbon nitride/zinc phytate (g-C3N4/PAZn) flame retardant was simple synthetized using two-dimensional g-C3N4 and bio-based PAZn by self-assembly and incorporated into epoxy resin (EP) for improving the fire safety. The flame retardance and smoke suppression were investigated by cone calorimetry. The results indicated that g-C3N4/PAZn-EP displayed outstanding flame retardancy and smoke suppression, for example, the peak heat release rate and peak smoke production rate decreased by 71.38% and 25%, respectively. Furthermore, the flame retardancy mechanism was further explored by char residue and thermal stability analysis. It can be predicted that g-C3N4/PAZn will provide valuable reference about bio-based flame retardant.

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“…15 Cai et al synthesis a PA modied magnetic CoFe 2 O 4 composite and found that the composites could selective adsorb methylene blue and congo red, which attributes to the synergistic effect of ion exchange and electrostatic interaction. 16 Zhao et al prepared a three-dimensional poly acrylamide-phytic acid-polydopamine hydrogel that can be served as reusable adsorbent with high efficiency for removal of both anionic and cationic dyes. The analysis indicates that the dyes are adsorbed on the hydrogel through the strong p-p stacking and anioncation interaction and can be easily removed from water regenerated by adjusting solution pH values.…”

Section: Introductionmentioning

confidence: 99%