Adsorption Behaviors of Polycyclic Aromatic Hydrocarbons and Oxygen Derivatives in Wastewater on N-Doped Reduced Graphene Oxide

Song, Ting; Tian, Weijun; Qiao, Kaili; Zhao, Jing; Chu, Meile; Du, Zhaoyang; Wang, Liang; Xie, Wenlong

doi:10.1016/j.seppur.2020.117565

Cited by 73 publications

(12 citation statements)

References 76 publications

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“…The adsorption capacity of SAC U–PF′ 's was slightly higher than SAC PF′ 's, possibly due to the further increase in the specific surface area caused by nitrogen doping. 27 …”

Section: Resultsmentioning

confidence: 99%

“…The adsorption capacity of SAC U-PF 0 's was slightly higher than SAC PF 0 's, possibly due to the further increase in the specic surface area caused by nitrogen doping. 27 With the increase of pH of Cd 2+ solution from 2 to 8, the adsorption capacity of SAC also increased gradually. At a low pH value, the adsorption capacity of the material was also low because hydroxyl was not readily available, and the binding sites for adsorption of Cd 2+ became fewer.…”

Section: Comparison Of Adsorption Capacities Of Different Sacmentioning

confidence: 91%

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Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon

et al. 2022

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“…The adsorption capacity of SAC U–PF′ 's was slightly higher than SAC PF′ 's, possibly due to the further increase in the specific surface area caused by nitrogen doping. 27 …”

Section: Resultsmentioning

confidence: 99%

Section: Comparison Of Adsorption Capacities Of Different Sacmentioning

confidence: 91%

Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon

et al. 2022

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“…Carbon nanomaterials doping with a heteroatom like N, S, and O could increase its adsorption efficiency besides its surface area [25]. For instance, the adsorption capacity of reduced graphene oxide was folded 1.4 times toward the removal of 2-methylanthraquinone and anthracene when doped with N-atom as reported by Song et al [26]. However, the advantages of GO as adsorbents, their separation from the reaction medium is a drawback that obstacles their application in water treatment applications.…”

Section: Introductionmentioning

confidence: 99%

The Synthesis of Magnetic Nitrogen-Doped Graphene Oxide Nanocomposite for the Removal of Reactive Orange 12 Dye

Alsaiari

Amari

Katubi

et al. 2022

Adsorption Science & Technology

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Herein, we report the nanofabrication of magnetic calcium ferrite (CaFe2O4) with nitrogen-doped graphene oxide (N-GO) via facile ultrasonication method to produce CaFe2O4/N-GO nanocomposite for the potential removal of reactive orange 12 (RO12) dye from aqueous solution. The successful construction of the nanocomposite was confirmed using different characterization techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform-infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The magnetic properties were studied using vibrating sample magnetometer (VSM) indicating ferromagnetic behavior of the synthesized materials that facilitate their separation using an external magnetic field after adsorption treatment. The addition of N-GO to CaFe2O4 nanoparticles enhanced the BET surface area from 24 to 52.93 m2/g as resulted from the N2 adsorption-desorption isotherm. The adsorption of the synthesized nanomaterials is controlled by several parameters (initial concentration of dye, contact time, adsorbent dosage, and pH), and the RO12 dye removal on the surface of CaFe2O4 nanoparticles and CaFe2O4/N-GO nanocomposite was reached through the chemisorption process as indicated from the kinetic study. The adsorption isotherm study indicated that the adsorption process of RO12 dye was best described through the Langmuir isotherm approving the monolayer adsorption. According to the Langmuir model, the maximum adsorption capacity for RO12 was 250 and 333.33 mg/g for CaFe2O4 nanoparticles and CaFe2O4/N-GO nanocomposite, respectively. The adsorption capacity offered by CaFe2O4/N-GO nanocomposite was higher than reported in the literature for adsorbent materials. Additionally, the regeneration study indicated that CaFe2O4/N-GO nanocomposite is reusable and cost-effective adsorbent. Therefore, the nanofabricated CaFe2O4/N-GO hybrid material is a promising adsorbent for water treatment.

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“…At present, the promising technology of wastewater treatment has focused on the characteristics of materials used in water treatment with the high removal performance, available feedstock, low cost, and easy operation for both adsorption and advanced oxidation methods [ 11 , 12 ]. The adsorption removal of pollutants in wastewater is simple, low-cost, high-speed, and high-efficiency, but the pollutants still cannot be eradicated [ 13 , 14 ]. The advanced oxidation process through free radicals generated by adding strong oxidants can degrade organic pollutants indiscriminately.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Zhang

Wang

et al. 2021

Nanomaterials

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A novel nano-β-FeOOH/Fe3O4/biochar composite with enhanced photocatalytic performance and superparamagnetism was successfully fabricated via an environmentally friendly one-step method. The structural properties of the prepared composite were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and a vibrating sample magnetometer. The XPS spectrum of the as-prepared composites confirmed the presence of Fe-O-C bonds between β-FeOOH and biochar, which could be conducive to transfer photo-generated electrons. UV-vis spectroscopy confirmed the existence of an electron–hole connection between β-FeOOH and biochar, which promoted the rapid interface transfer of photogenerated electrons from β-FeOOH to biochar. These novel structures could enhance the response of biochar to accelerate the photoelectrons under visible light for more free radicals. Electron spin resonance analysis and free radical quenching experiments showed that •OH was the primary active species in the photodegradation process of methyl orange by nano-β-FeOOH/Fe3O4/biochar. In the synergistic photocatalytic system, β-FeOOH/Fe3O4/biochar exhibited excellent catalytic activity for the degradation of azo dye (methyl orange), which is 2.03 times higher than that of the original biochar, while the surface area decreased from 1424.82 to 790.66 m2·g−1. Furthermore, β-FeOOH/Fe3O4/biochar maintained a stable structure and at least 98% catalytic activity after reuse, and it was easy to separate due to its superparamagnetism. This work highlights the enhanced photocatalytic performance of β-FeOOH/Fe3O4/biochar material, which can be used in azo dye wastewater treatment.

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Adsorption Behaviors of Polycyclic Aromatic Hydrocarbons and Oxygen Derivatives in Wastewater on N-Doped Reduced Graphene Oxide

Cited by 73 publications

References 76 publications

Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon

Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon

The Synthesis of Magnetic Nitrogen-Doped Graphene Oxide Nanocomposite for the Removal of Reactive Orange 12 Dye

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

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Adsorption Behaviors of Polycyclic Aromatic Hydrocarbons and Oxygen Derivatives in Wastewater on N-Doped Reduced Graphene Oxide

Cited by 73 publications

References 76 publications

Multiple chemical modifications and Cd2+ adsorption characteristics of sludge-based activated carbon

Multiple chemical modifications and Cd2+ adsorption characteristics of sludge-based activated carbon

The Synthesis of Magnetic Nitrogen-Doped Graphene Oxide Nanocomposite for the Removal of Reactive Orange 12 Dye

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

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Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon

Multiple chemical modifications and Cd²⁺ adsorption characteristics of sludge-based activated carbon