Manganese oxide nanoparticles impregnated graphene oxide aggregates for cadmium and copper remediation

Wan, Shunli; Ding, Wei; Wang, Yalan; Wu, Jianfei; Gu, Yawei; He, Feng

doi:10.1016/j.cej.2018.06.068

Cited by 92 publications

(19 citation statements)

References 38 publications

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“…The increase in pollution in recent years as well as the resulting health problems have led to the in-depth study of new ways of environmental remediation [75]. Among all the methods proposed to eliminate metal ions, organophosphates and dyes in residual waters, adsorption is the best in terms of feasibility and cost, and also the most widely used [76,77]. The Mg-based nanocomposites fabricated by electrospinning process are materials with ideal characteristics for being used in adsorption due to their large surface area.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Potential Applications of Magnesium-Based Polymeric Nanocomposites Obtained by Electrospinning Technique

et al. 2020

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In the last few decades, the development of new electrospun materials with different morphologies and advanced multifunctional properties are strongly consolidated. There are several reviews that describe the processing, use and characterization of electrospun nanocomposites, however, based on our knowledge, no review on electrospun nanocomposites reinforced with nanoparticles (NPs) based on magnesium, Mg-based NPs, are reported. Therefore, in the present review, we focus attention on the fabrication of these promising electrospun materials and their potential applications. Firstly, the electrospinning technique and its main processing window-parameters are described, as well as some post-processing methods used to obtain Mg-based materials. Then, the applications of Mg-based electrospun nanocomposites in different fields are pointed out, thus taking into account the current trend in developing inorganic-organic nanocomposites to gradually satisfy the challenges that the industry generates. Mg-based electrospun nanocomposites are becoming an attractive field of research for environmental remediation (waste-water cleaning and air filtration) as well as for novel technical textiles. However, the mayor application of Mg-based electrospun materials is in the biomedical field, as pointed out. Therefore, this review aims to clarify the tendency in using electrospinning technique and Mg-based nanoparticles to huge development at industrial level in the near future.

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Section: Environmental Applicationsmentioning

confidence: 99%

Potential Applications of Magnesium-Based Polymeric Nanocomposites Obtained by Electrospinning Technique

et al. 2020

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“…Moreover, MnO 2 has been successfully introduced into the structure of different carriers—for instance cellulose, biochar, chitin, chitosan, alginate beads, activated carbon, carbon fibers and nanotubes, graphene, polyester fiber, ion exchange resins, as well as poly- (vinyl alcohol) and (vinyl pyrrolidone). The obtained materials have been exploited as versatile sorbents for, inter alia, Cd 2+ , Cu 2+ , Li + , Ni 2+ , Pb 2+ , Sr 2+ , Zn 2+ , As(III), As(V) and anionic dyes from water [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. We chose a simple HIX synthesis method which is based on ion exchange reaction of carboxylic functional groups with Mn 2+ followed by an oxidation/disproportionation reaction in the presence of MnO 4 − .…”

Section: Introductionmentioning

confidence: 99%

Adsorptive-Oxidative Removal of Sulfides from Water by MnO2-Loaded Carboxylic Cation Exchangers

2020

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Hybrid ion exchangers (HIX) containing manganese(IV) oxide (MnO2) based on macroporous and gel-type carboxylic cation exchangers as supporting materials were obtained. The hybrid materials were characterized using scanning electron microscopy with energy dispersive spectrometry (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD) and nitrogen adsorption isotherms at 77 K and mercury porosimetry. HIX with introduced MnO2 (20.0–32.8 wt% Mn) were tested for removal of dissolved sulfides from anoxic aqueous solutions with 100–500 mg S2−/dm3 concentrations. The process proceeded effortlessly at pH 10–13 despite unfavorable electrostatic interactions of the reactants. The highest exhibited sorption capacity was 144.3 ± 7.1 mg S2−/g. Approximately 65% of dissolved sulfides were oxidized to S2O32− ions and repelled from HIX structure. On average, 13% of sulfide removal products were adsorbed by the MnO2 surface. The impact of MnO2 load and the ionic form of HIX functional groups on removal of sulfides and resulting products was examined. The mechanism of the process is suggested.

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“…16 The same distinction could be seen between the aggregates of manganese oxide impregnated graphene oxide and the unimpregnated graphene oxide. 17 At the same time, the loading of magnetic nanoparticles has received considerable attention for its large specic surface area, high dispersion, superparamagnetism in water, and efficient separation from solution. 18 The loaded manganese oxide or iron oxide material proved to have an excellent removal rate and easy recyclability.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of divalent cadmium by calcified iron-embedded carbon beads

Cheng

Wang

et al. 2020

RSC Adv.

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A novel iron-embedded carbon bead was prepared by the calcination of a calcium alginate gel bead mixed with iron nanoparticles coated by polydopamine. The prepared iron-embedded carbon bead was characterized by infrared spectrum analysis, X-ray diffraction, Raman spectroscopy, vibrating sample magnetometry, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. It was discovered that the novel structure efficaciously prevented the agglomeration of iron nanoparticles. Additionally, the effects of dose, pH, exposure time, temperature and initial concentration on the adsorption of Cd(II) were studied, and the reusability of the material was analyzed. Fe/SA-C showed high Cd(II) removal capability (220.3, 225.7, 240.8 mg g À1 at 288, 298, 308 K), easy recoverability and high stability. In addition, some slightly different interpretations of the adsorption mechanism are given. This study clearly revealed that Fe/SA-C has potential application in the removal of Cd(II).

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Manganese oxide nanoparticles impregnated graphene oxide aggregates for cadmium and copper remediation

Cited by 92 publications

References 38 publications

Potential Applications of Magnesium-Based Polymeric Nanocomposites Obtained by Electrospinning Technique

Potential Applications of Magnesium-Based Polymeric Nanocomposites Obtained by Electrospinning Technique

Adsorptive-Oxidative Removal of Sulfides from Water by MnO2-Loaded Carboxylic Cation Exchangers

Adsorption of divalent cadmium by calcified iron-embedded carbon beads

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