Magnetic Carbon Nanocages: An Advanced Architecture with Surface- and Morphology-Enhanced Removal Capacity for Arsenites

Petala, Eleni; Georgiou, Yiannis; Kostas, Vasilis; Dimos, Konstantinos; Karakassides, Michael A.; Deligiannakis, Yiannis; Aparicio, Claudia; Zbořil, Radek

doi:10.1021/acssuschemeng.7b00394

Cited by 36 publications

(21 citation statements)

References 89 publications

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“…Moreover, The O 1s XPS spectrum in Figure 3 c exhibits three peaks at binding energies 534.6, 533.0, 530.0 eV, corresponding to chemisorbed O, C-O/C=O, and iron oxides Fe-O, while the C 1s XPS spectrum in Figure 3 d indicates the presence of chemical bonds consisting of O-C=O (290.6 eV), C=O (288.5 eV), C-O-C (286.9 eV), C-O (285.7 eV), C-C/C-H (284.4 eV) [ 45 ]. These chemical bonds along with respective energies from the fitting of C 1s is very much in line with recent work [ 46 ].…”

Section: Resultssupporting

confidence: 90%

Tunable Synthesis of Mesoporous Carbons from Fe3O(BDC)3 for Chloramphenicol Antibiotic Remediation

Tran

Nguyen

Le³

et al. 2019

Nanomaterials

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Chloramphenicol (CAP) is commonly employed in veterinary clinics, but illegal and uncontrollable consumption can result in its potential contamination in environmental soil, and aquatic matrix, and thereby, regenerating microbial resistance, and antibiotic-resistant genes. Adsorption by efficient, and recyclable adsorbents such as mesoporous carbons (MPCs) is commonly regarded as a “green and sustainable” approach. Herein, the MPCs were facilely synthesized via the pyrolysis of the metal–organic framework Fe3O(BDC)3 with calcination temperatures (x °C) between 600 and 900 °C under nitrogen atmosphere. The characterization results pointed out mesoporous carbon matrix (MPC700) coating zero-valent iron particles with high surface area (~225 m2/g). Also, significant investigations including fabrication condition, CAP concentration, effect of pH, dosage, and ionic strength on the absorptive removal of CAP were systematically studied. The optimal conditions consisted of pH = 6, concentration 10 mg/L and dose 0.5 g/L for the highest chloramphenicol removal efﬁciency at nearly 100% after 4 h. Furthermore, the nonlinear kinetic and isotherm adsorption studies revealed the monolayer adsorption behavior of CAP onto MPC700 and Fe3O(BDC)3 materials via chemisorption, while the thermodynamic studies implied that the adsorption of CAP was a spontaneous process. Finally, adsorption mechanism including H-bonding, electrostatic attraction, π–π interaction, and metal–bridging interaction was proposed to elucidate how chloramphenicol molecules were adsorbed on the surface of materials. With excellent maximum adsorption capacity (96.3 mg/g), high stability, and good recyclability (4 cycles), the MPC700 nanocomposite could be utilized as a promising alternative for decontamination of chloramphenicol antibiotic from wastewater.

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Section: Resultssupporting

confidence: 90%

Tunable Synthesis of Mesoporous Carbons from Fe3O(BDC)3 for Chloramphenicol Antibiotic Remediation

Tran

Nguyen

Le³

et al. 2019

Nanomaterials

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“…All measurements we performed using aliquots of 8.3 mL shifting at pH < 0.5 by 1.5 mL from 6.66 M of HCl and final 2 M concentration in the electrochemical cell, then 8 ppm of Cu 2+ were added. In the following, As III was determined by SW-CSV with accumulation potential E = −400 mV and accumulation time in the 60 s. As III quantified by its signal at E 1/2 = −670 mV 16,19,22 .…”

Section: Covalent Grafting Of Zrmof On Sf D (Zrmof@sf D )mentioning

confidence: 99%

“…Our systematic efforts during the last decade led to a series of nanomaterials with promising performances, e.g. a mesoporous spinel CoFe 2 O 4 24 with an uptake of 252 mg As III g −1 , magnetic carbon nanocages 22 with a sorption capacity of 264 mg As III g −1 and MIL-100(Fe) 16 showing uptake of 120 mg As III g −1 .…”

mentioning

confidence: 99%

“…typical for natural waters, the dominant species is the neutral form H 3 AsO 3 27,28 . Thus -so far -the strategy by all research groups, including us 16,22,29 , was to maximize the number and accessibility of surface sites based on diligent preparation protocols. In this way, it has been achieved a max As III -uptake capacity 320 mg gr −1 by γ-Fe 2 O 3 nanoparticles encapsulated in a macroporous Silica 23 .…”

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confidence: 99%

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A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Georgiou

Rapti

Mavrogiorgou

et al. 2020

Sci Rep

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Exposure of humans to Arsenic from groundwater drinking sources is an acute global public health problem, entailing the urgent need for highly efficient/low-cost Arsenite (As iii) up-taking materials. Herein we present an innovative hybrid-material, ZrMOF@SF d operating like an "As iii-sponge" with unprecedented efficiency of 1800 mg As iii gr −1. ZrMof@SF d consists of a neutral Zirconium Metal-Organic Framework [ZrMOF] covalently grafted on a natural silk-fiber (SF d). ZrMOF itself exhibits As iii adsorption of 2200 mg gr −1 , which supersedes any-so far-known As ΙΙΙ-sorbent. Using XPS, FTIR, BETporosimetry data, together with theoretical Surface-Complexation-Modeling (SCM), we show that the high-As ΙΙΙ-uptake is due to a sequence of two phenomena:[i] at low As iii-concentrations, surfacecomplexation of H 3 Aso 3 results in As iii-coated voids of ZrMOF, [ii] at increased As iii-concentrations, the As iii-coated voids of ZrMOF are filled-up by H 3 Aso 3 via a partitioning-like mechanism. in a more general context, the present research exemplifies a mind-changing concept, i.e. that a "partitioning-like" mechanism can be operating for adsorption of metalloids, such as H 3 Aso 3, by metal oxide materials. So far, such a mechanism has been conceptualized only for the uptake of non-polar organics by natural organic matter or synthetic polymers. Arsenic exposure through drinking water sourced from groundwater, is a global public health problem that is particularly devastating in certain highly populated countries 1,2. According to a 2000 to 2010 case study, 35 to 77 million people in areas of Bangladesh or India have been chronically exposed to arsenic in their drinking water in what described as the most significant mass poisoning in history 3. Arsenic is a naturally occurring metalloid, also released to the environment via anthropogenic activities. Arsenic strongly binds to proteins, so traces of this element can cause severe health problems to all life forms 4. The predominant forms of arsenic in the aquatic environment are As III (arsenite) and As V (arsenate). As III is more hazardous than As V , as it is more mobile/bioavailable, thus more toxic 5. This toxicity is due to its dominant H 3 AsO 3 form, i.e. the predominating species in a wide range of pH < 9 6 , typically encountered in natural waters. So far, traditional ion-exchange materials and sorbents, e.g. zeolites, clays, layered double hydroxides, resins have been used as arsenic adsorbends, however, with limited efficiency vs. As III 7,8. Given that As V , which exists as anion at pH > 2, is easier to adsorb on cationic surfaces, to overcome the low efficiency of As III uptake, an extra step of oxidation of As III to As V can be chosen before the application of various remediation technologies. Such oxidative pretreatment, however, suffers from the presence of multiple substances that interfere with As III oxidation 9,10. Therefore, it will be desirable to develop sorbents that could directly capture As III in natural pH conditions, without the need for ...

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“…It has also been demonstrated that magnetic particles and their various modifications are used to remove metals and metals from water. The advantages of magnetic particles include chemical and physical stability, price, biocompatibility, and environmental acceptability [27,28]. They are also used to create biosensors for electrochemical analyzes.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of Selenium (IV) Removal from Its Aqueous Solutions by Unmodified and Modified Graphene Oxide

et al. 2019

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The removal of selenium from superficial and waste water is a worldwide problem. The maximum limit according to the World Health Organization (WHO) for the selenium in the water is set at a concentration of 10 μg/L. Carbon based adsorbents have attracted much attention and recently demonstrated promising performance in removal of selenium. In this work, several materials (iron oxide based microparticles and graphene oxides materials) and their composites were prepared to remove Se(IV) from water. The graphene oxides were prepared according to the simplified Hummer’s method. In addition, the effect of pH, contact time and initial Se(IV) concentration was tested. An electrochemical method such as the differential pulse cathodic stripping voltammetry was used to determine the residual selenium concentration. From the experimental data, Langmuir adsorption model was used to calculate the maximum adsorption capacity. Graphene oxide particles modified by iron oxide based microparticles was the most promising material for the removal of Se(IV) from its aqueous solution at pH 2.0. Its adsorption efficiency reached more than 90% for a solution with given Se(IV) concentration, meanwhile its maximal recorded adsorption capacity was 18.69 mg/g.

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Magnetic Carbon Nanocages: An Advanced Architecture with Surface- and Morphology-Enhanced Removal Capacity for Arsenites

Cited by 36 publications

References 89 publications

Tunable Synthesis of Mesoporous Carbons from Fe3O(BDC)3 for Chloramphenicol Antibiotic Remediation

Tunable Synthesis of Mesoporous Carbons from Fe3O(BDC)3 for Chloramphenicol Antibiotic Remediation

A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Electrochemical Evaluation of Selenium (IV) Removal from Its Aqueous Solutions by Unmodified and Modified Graphene Oxide

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