One-pot synthesis of microporous Fe2O3/g-C3N4 and its application for efficient removal of phosphate from sewage and polluted seawater

Gamshadzehi, Elham; Nassiri, Mahmoud; Ershadifar, Hamid

doi:10.1016/j.colsurfa.2019.01.029

Cited by 39 publications

(12 citation statements)

References 65 publications

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“…For MNPs with magnetic properties like Fe, Ni, Co, Fe x O y , and MFe 2 O 4 (M denotes metal), , the magnetically separable CMNHs can be easily recycled using an external magnetic field, suppressing the likelihood of generating a secondary waste from the release of the nanoscale treatment agents. Moreover, the nanohybrids exhibit high stability, selectivity, and reusability with no appreciable deterioration in reactivity after several consecutive cycles of use ( n ≥ 6), − due to the strong mechanical strength of the carbon scaffolds. These advantages can greatly minimize operational cost, while enhancing the removal efficiency of multiple contaminants from water and wastewater.…”

Section: Energy Water and Environmental Applications Of Cmnhsmentioning

confidence: 99%

Next-Generation Multifunctional Carbon–Metal Nanohybrids for Energy and Environmental Applications

Wang

Saleh

Sun

et al. 2019

Environ. Sci. Technol.

119

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Nanotechnology has unprecedentedly revolutionized human societies over the past decades and will continue to advance our broad societal goals in the coming decades. The research, development, and particularly the application of engineered nanomaterials have shifted the focus from "less efficient" single-component nanomaterials toward "superior-performance", nextgeneration multifunctional nanohybrids. Carbon nanomaterials (e.g., carbon nanotubes, graphene family nanomaterials, carbon dots, and graphitic carbon nitride) and metal/metal oxide nanoparticles (e.g., Ag, Au, CdS, Cu2O, MoS2, TiO2, and ZnO) combinations are the most commonly pursued nanohybrids (carbon-metal nanohybrids; CMNHs), which exhibit appealing properties and promising multifunctionalities for addressing multiple complex challenges faced by humanity at the critical energy-water-environment (EWE) nexus. In this frontier review, we first highlight the altered and newly emerging properties (e.g., electronic and optical attributes, particle size, shape, morphology, crystallinity, dimensionality, carbon/metal ratio, and hybridization mode) of CMNHs that are distinct from those of their parent component materials. We then illustrate how these important newly emerging properties and functions of CMNHs direct their performances at the EWE nexus including energy harvesting (e.g., H2O splitting and CO2 conversion), water treatment (e.g., contaminant removal and membrane technology), and environmental sensing and

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Section: Energy Water and Environmental Applications Of Cmnhsmentioning

confidence: 99%

Next-Generation Multifunctional Carbon–Metal Nanohybrids for Energy and Environmental Applications

Wang

Saleh

Sun

et al. 2019

Environ. Sci. Technol.

119

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“…However, according to the Environmental White Paper of FY2017, the TP concentrations in both lakes obviously exceeded the standard values (0.14 and 0.15 mg/L, respectively), and they were reported to be the first and third worst eutrophic lake in Japan in 2016 by the Ministry of the Environment, Government of Japan [4]. The World Health Organization (WHO) also recommends phosphate ion concentration of less than 5 mg/L in natural water [6], though water blooms have broken out in China and Southeast Asia frequently [1,7,8]. In order not to occur water environmental problems, it is important to not only reduce releasing nutrients into natural water but also remove phosphate from wastewater [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, phosphate has been removed with coagulating sedimentation method at sewage treatment facility [6,12]. The problems of this method were to produce a large amount of waste and not to able to reuse the phosphorus resources.…”

Section: Introductionmentioning

confidence: 99%

Phosphate ion adsorption properties of PAN-based activated carbon fibers prepared with K2CO3 activation

2020

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Adsorbents for phosphate ion removal were prepared with K 2 CO 3 activation and heat treatment at 950 °C from polyacrylonitrile-based carbon fiber (PAN-CF). Comparative tests for specific surface area and pore structures, elemental and nitrogen species analysis, and phosphate ion adsorption experiments demonstrated that K(3)-Δ, which was activated with K 2 CO 3 /PAN-CF weight ratio of 3 and then treated at 950 °C, exhibited larger amount of quaternized-nitrogen (0.46 wt%) and equilibrium adsorption amount (0.23 mmol/g) among the prepared adsorbents. The experimental data for phosphate adsorption of K(3)-Δ was well fitted to Langmuir adsorption isotherms and pseudo-second-order kinetic model. As for regeneration performance, K(3)-Δ still remained more than 60% adsorption amount of the fresh adsorbent after rejuvenation treatment.

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“…Iron oxyhydroxide, also known as ferrihydrite (henceforth denoted FeO), is the most commonly used sorbent for arsenate and phosphate (these anions forms inner-sphere coordination complexes with FeO) because of its high capacitance and excellent selectivity. − It is available as a fine powder, however, for practical applications, FeO needs to be fixed on a suitable, solid support. For this purpose, we have synthesized a new iron oxyhydroxide nanocomposite membrane (FeOm) and applied it for the selective removal of arsenate and phosphate by using the proposed electro-assisted sorption method.…”

Section: Introductionmentioning

confidence: 99%

Electro-Enhanced Membrane Sorption: A New Approach for Selective Ion Separation and Its Application to Phosphate and Arsenic Removal

Chaudhury

Nir

2020

Ind. Eng. Chem. Res.

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We describe a new electro-enhanced sorption approach, where an electric field is applied across an ion-selective nanocomposite membrane. Unlike capacitive deionization, here, the membrane rather than the electrode functions as the sorbent, whereas the electrodes are inert. This electrode-sorbent decoupling extends the space of suitable sorption materials, currently constrained to conductive materials. Here, we synthesized ferric oxyhydroxide (FeO) nanocomposite membranes (FeOm) using diffusion-controlled growth of FeO nanoparticles within porous track-etched membranes, resulting in a high-capacity sorbent. The use of FeOm to study the electro-enhanced sorption of phosphate revealed that the electric potential (5−15 V) accelerates both the adsorption and desorption steps. Furthermore, desorption at pH ∼10−11much lower than the current practice for FeO regeneration (pH 13−14)was demonstrated, potentially enabling 2−3 orders of magnitude savings on chemical consumption. Lastly, a highly selective uptake of arsenate from simulated groundwater was demonstrated, pointing at the potential of the new approach to intensify sorption processes.

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One-pot synthesis of microporous Fe2O3/g-C3N4 and its application for efficient removal of phosphate from sewage and polluted seawater

Cited by 39 publications

References 65 publications

Next-Generation Multifunctional Carbon–Metal Nanohybrids for Energy and Environmental Applications

Next-Generation Multifunctional Carbon–Metal Nanohybrids for Energy and Environmental Applications

Phosphate ion adsorption properties of PAN-based activated carbon fibers prepared with K2CO3 activation

Electro-Enhanced Membrane Sorption: A New Approach for Selective Ion Separation and Its Application to Phosphate and Arsenic Removal

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