Modulating the electromagnetic shielding mechanisms by thermal treatment of high porosity graphene aerogels

González, Marta; Baselga, Juan; Pozuelo, Javier

doi:10.1016/j.carbon.2019.02.068

Cited by 41 publications

(27 citation statements)

References 35 publications

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“…The spacing between the crystal planes of graphene, graphene oxide, carbon nanotubes (CNTs), oxidized carbon nanotubes (O-CNTs), and nanohybrid GO/O-CNTs was calculated using Bragg’s equation as follows where n is chosen as 1, λ is the X-ray wavelength taken as 1.5406 Å using Cu Kα radiation, θ is Bragg’s angle, and d is the interlayer spacing between crystal planes. A distinctive diffraction peak (002) of graphene at 26.14° with an interlayer spacing of 3.4 Å corresponds to hexagonal crystalline graphite between graphene nanosheets, as illustrated in Figure . However, GO displays two lower intensity peaks at 11.55 and 23.00 o with interlayer spacings of 7.7 and 3.9 Å, which match with hexagonal crystalline graphite.…”

Section: Results and Discussionmentioning

confidence: 99%

Ultimate Eradication of the Ciprofloxacin Antibiotic from the Ecosystem by Nanohybrid GO/O-CNTs

2020

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Eradication of pharmaceutical drugs from the global ecosystem has received remarkable attention due to the extensive horrible consequences on the human immunological system and the high rate of human deaths. The urgent need for drug eradication became the dominant priority for many research institutions worldwide due to the sharp increase of antimicrobial resistance (AMR) in the human body, which inhibits drug effectiveness and leads ultimately to death. Nanohybrid GO/O-CNTs was fabricated from graphene oxide (GO) cross-linked via calcium ions (Ca2+) with oxidized carbon nanotubes (O-CNTs) to eradicate the well-known ciprofloxacin antibiotic drug from aqueous solutions. The ciprofloxacin drug is medically prescribed in millions of medical prescriptions every year and typically exists in domestic and wastewaters. Characterization of the nanohybrid GO/O-CNTs was carried out through spectroscopic (Fourier Transform Infrared (FTIR) and X-ray diffraction (XRD)), thermal (Thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG)), and microscopic (scanning electron microscopy (SEM)) techniques. Optimum parameters for the drug eradication process from aqueous solutions were verified and selected as follows: contact time = 4 h, pH = 6.0, temperature = 290 K, %CaCl2 = 0.5%, GO/O-CNT ratio = 4:1, and adsorbent mass = 1.0 mg. The equilibrium data were fitted to different adsorption isotherms, and the Langmuir isotherm provided the best fit to our data. Dynamic studies demonstrated a pseudo-second-order removal process for the ciprofloxacin drug, and thermodynamic parameters confirmed exothermic drug adsorption (−27.07 kJ/mol) as well as a physisorption process. For the sake of fighting against the generated AMR, our working strategy demonstrated a removal efficiency of 99.2% of the ciprofloxacin drug and drug uptake as high as 512 mg/g.

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Section: Results and Discussionmentioning

confidence: 99%

Ultimate Eradication of the Ciprofloxacin Antibiotic from the Ecosystem by Nanohybrid GO/O-CNTs

2020

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“…Bragg's equation was used to calculate the interlayer spacing in crystalline peaks of graphene, graphene oxide, carbon nanotubes (CNTs), oxidized carbon nanotubes (OCNTs) and nanohybrid GO-OCNTs as depicted in Table 1. A characteristic sharp (002) diffraction peak of graphene at 26.14 corresponds to hexagonal crystalline graphite 50 and an interlayer spacing of 3.4Å between graphene nanosheets, as depicted in Fig. 4A.…”

Section: Resultsmentioning

confidence: 99%

Use of nanohybrid nanomaterials in water treatment: highly efficient removal of ranitidine

2020

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“…RGO-850 °C has a rich mesoporous structure and moderate macroporous network, which not only provides an available specific surface area to adsorb ions but also provides enough ways to achieve rapid response to ion adsorption and desorption. 3,29,30…”

Section: Characterizationmentioning

confidence: 99%

“…More seriously, water pollution has aggravated the shortage of freshwater. [1][2][3][4][5] Desalination technology is an important method to solve this problem. [6][7][8][9][10] The main desalination technologies include reverse osmosis (RO) and multi-stage flash (MSF).…”

Section: Introductionmentioning

confidence: 99%

The structural evolution of 3D-RGO with reduction temperature and its effect on capacitive deionization performance

Liu

Chen

Feng

et al. 2022

Environ. Sci.: Water Res. Technol.

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Modulating the electromagnetic shielding mechanisms by thermal treatment of high porosity graphene aerogels

Cited by 41 publications

References 35 publications

Ultimate Eradication of the Ciprofloxacin Antibiotic from the Ecosystem by Nanohybrid GO/O-CNTs

Ultimate Eradication of the Ciprofloxacin Antibiotic from the Ecosystem by Nanohybrid GO/O-CNTs

Use of nanohybrid nanomaterials in water treatment: highly efficient removal of ranitidine

The structural evolution of 3D-RGO with reduction temperature and its effect on capacitive deionization performance

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