Expanded graphite as a support for Ni/carbon composites

Afanasov, I. M.; Шорникова, О. Н.; Авдеев, В. В.; Lebedev, Oleg I.; Tendeloo, G. Van; Matveev, Andrei T.

doi:10.1016/j.carbon.2008.10.034

Cited by 47 publications

(30 citation statements)

References 37 publications

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“…[25] Expanded graphite (EG) is a possible material with low density, non-toxicity, low cost, and high loading capacity. [34,35] EG has been widely used for the removal of organic pollutants such as oil, [36] organic dyes, [37] carbamazepine, [38] toluene, [39] methylene blue, [40] polyethylene glycol, [22], and methyl orange. [41] Also, EG is easy to be obtained with the chemical method or electrical chemical method by oxidation and the intercalation reaction.…”

Section: Introductionmentioning

confidence: 99%

Expanded graphite loaded with lanthanum oxide used as a novel adsorbent for phosphate removal from water: performance and mechanism study

Zhang

Gao

et al. 2014

Environmental Technology

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A novel adsorbent of expanded graphite (EG) loaded with lanthanum oxide (EG-LaO) was prepared for phosphate removal from water and characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. The effects of impregnation time, La3+ concentration, activation time, and activation temperature on the phosphate removal performance of the adsorbent were studied for optimization of preparation conditions. Isothermal adsorption studies suggested that the Langmuir model fits the experimental data well. Adsorption kinetics investigation showed that the pseudo-second-order model fits the experimental data quite well, indicating that the adsorption process is mainly a process of chemical adsorption, and chloride ions compete to react with the active sites of the adsorbent but do not prevent phosphate from adsorbing onto EG-LaO. The adsorption mechanism studies were performed by a pH dependence study of the adsorption amount. The results demonstrated that the probable mechanisms of phosphate adsorption on EG-LaO were electrostatic and Lewis acid-base interactions in addition to ion exchange.

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Section: Introductionmentioning

confidence: 99%

Expanded graphite loaded with lanthanum oxide used as a novel adsorbent for phosphate removal from water: performance and mechanism study

Zhang

Gao

et al. 2014

Environmental Technology

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“…Graphite shows an XRD pattern of 2θ = 27.04°, corresponding to its highly organized layer structure with an interlayer distance of 0.33 nm along the (002) orientation. In addition, 2θ = 44.8 and 55 o , representing the (100) and (004) planes of graphite [33] (Fig. 3a) were noted.…”

Section: Ft-ir Spectramentioning

confidence: 95%

Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature

Mudila¹,

Joshi²,

Rana³

et al. 2014

Carbon letters

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An attempt was made to investigate the effect of the preparation temperature on the electrocapacitive performance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs). For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammonium bromide-assisted dilute-solution polymerization of pyrrole in presence of GO (wt%) ranging from 1.0 to 4.0 with ferric chloride as an oxidant. The formation of the PNCs was ascertained through Fourier-transform infrared spectrometry, X-ray diffraction spectra, scanning electron microscopy and simultaneous thermogravimetric-differential scanning calorimetry. The electrocapacitive performance of the electrodes derived from sulphonated polysulphone-bound PNCs was evaluated through cyclic voltammetry with reference to Ag/ AgCl at a scan rate (V/s) ranging from 0.2 and 0.001 in potassium hydroxide (1.0 M). The incorporation of GO into the PPY matrix at a reduced temperature has a pronounced effect on the electrocapacitive performance of PNCs. Under identical scan rates (0.001 V/s), PNCs prepared at 10 ± 1°C render improved specific conductivity (526.33 F/g) and power density (731.19 W/Kg) values compared to those prepared at 30 ± 1°C (217.69 F/g, 279.43 W/Kg). PNCs prepared at 10 ± 1°C rendered a capacitive retention rate of ~96% during the first 500 cycles. This indicates the excellent cyclic stability of the PNCs prepared at reduced temperatures for supercapacitor applications.

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“…As Liu's group used H 2 /N 2 mixture (H 2 /N 2 =1/2) during the whole calcination process so as to perform the reduction of Ni 2+ [23] and Pd 2+ [28]. However, carbon itself has reducibility, graphite reduces nickel oxide at above 900 C, whereas more active carbon forms like activated carbons or charcoal reduce NiO at as low temperature as 500 C [29]. In this work the calcination process was performed over 800 C, so the reduction Ni from Ni 2+ can be achieved.…”

Section: Xrdmentioning

confidence: 98%

Electrospun nickel loaded porous carbon nanofibers for simultaneous determination of adenine and guanine

Luo

Ding

et al. 2015

Electrochimica Acta

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Expanded graphite as a support for Ni/carbon composites

Cited by 47 publications

References 37 publications

Expanded graphite loaded with lanthanum oxide used as a novel adsorbent for phosphate removal from water: performance and mechanism study

Expanded graphite loaded with lanthanum oxide used as a novel adsorbent for phosphate removal from water: performance and mechanism study

Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature

Electrospun nickel loaded porous carbon nanofibers for simultaneous determination of adenine and guanine

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