Surface-modified carbon black for As(V) removal

Borah, Dipu; Satokawa, Shigeo; Kato, Shigeru; Kojima, Toshinori

doi:10.1016/j.jcis.2007.11.019

Cited by 95 publications

(84 citation statements)

References 38 publications

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“…Classically, the Brodie and Staudenmaier method utilizes strong oxidizing chemicals like KClO3 and fuming nitric acid [14,15], while the Hummers method uses a mixture of KMnO4 and H2SO4 [16,17]. Carbons can also be functionalized by thermal treatment with oxidizing acids such as HNO3 and H2SO4 [18,19]. On the one hand, these methods require cautious handling due to the highly exothermic reaction, high temperatures, and hazardous chemicals, and they often require extensive washing steps.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Functionalization of Carbon Black at Room Temperature

Leistenschneider

Zürbes

Schneidermann

et al. 2018

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Carbon nanomaterials such as carbon blacks are intrinsically hydrophobic with limited wettability in aqueous media, thus restricting their potential applications. To improve their hydrophilicity, common methods tend to utilize harmful chemicals and conditions, such as a mixture of KMnO 4 and H 2 SO 4 or a complex and expensive synthesis setup. In our work, we report a simple method to improve the wettability of these materials by a mechanochemical treatment completed within 1 h at room-temperature utilizing a NH 3 solution. Besides increasing the specific surface area of the carbon black from 67 m 2 ·g −1 up to 307 m 2 ·g −1 , our process also incorporates nitrogen-and oxygen-containing functional groups into the carbon. This reduces the contact angle from 80 • to 30 • , confirming an enhanced wettability. Our work presents an easy, fast, and straightforward pathway towards the functionalization of carbon nanomaterials and can be of use in various applications where aqueous wettability is advantageous.

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Section: Introductionmentioning

confidence: 99%

Mechanochemical Functionalization of Carbon Black at Room Temperature

Leistenschneider

Zürbes

Schneidermann

et al. 2018

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“…The pH of the raw chars and the functionalized chars are 3.1 and between 2 and 4 respectively. Literature reports the investigation of a correlation between the content of O-containing groups and the pH pzc [32][33][34]. A relationship has been established [22] and it shows that the pH pzc decreases rapidly as the oxygen content increases from 0 to 3 mmol/g.…”

Section: Global Aciditymentioning

confidence: 99%

Reactivity enhancement of gasification biochars for catalytic applications

Ducousso

Weiss-Hortala

Nzihou

et al. 2015

Fuel

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“…1,2 Among the various studies, amine-functionalized adsorbents have been found to be the most common, arising from the strong binding properties of amine to transition metals. [3][4][5][6][7][8] The mechanism for the amine functionalization process is mainly based on the use of aliphatic diamine (especially ethylenediamine) where one of the two amine groups is utilized for covalent binding to the desired adsorbent, while the other one could be easily available for coordination to the target analyte via its lone pair of valance electrons.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aliphatic Diamine Length Functionalized Silica Coated Iron Magnetic Nanoparticles on Metal Capacity and Speed of Cu(II) Uptake from Aqueous Media

Ahmed¹,

Soliman²

2014

ANAL. SCI.

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Three solid phase extractors based on silica coated magnetic nanoparticles (Fe3O4-SiO2) functionalized aliphatic diamines were synthesized. The magnetic core of Fe3O4 was synthesized first by the sol-gel method, then protected by a layer of silica using tetraethylorthosilicate (TEOS) followed by functionalization using three aliphatic diamines: 1,2-ethanediamine (1,2-EDA), 1,5-pentanediamine (1,5-PDA) and 1,8-octanediamine (1,8-ODA). These steps for producing the targeted three adsorbents Fe3O4-SiO2-1,2-EDA, Fe3O4-SiO2-1,5-PDA and Fe3O4-SiO2-1,8-ODA with different amines spacer arm were followed up using Fourier Transform Infrared (FTIR) spectra and scanning electron microscope (SEM). The effect of the spacer arm length of the diamines on selective binding and metal capacity values of Cu(II) ions was studied as a function of the time needed to attain equilibrium under optimized conditions of pH, mass of adsorbent and initial concentration of Cu(II) ions. The order of increasing metal capacity for copper ions using magnetic nano-adsorbents was Fe3O4-SiO2-1,2-EDA < Fe3O4-SiO2-1,5-PDA < Fe3O4-SiO2-1,8-ODA at 5 s equilibrium time.

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Surface-modified carbon black for As(V) removal

Cited by 95 publications

References 38 publications

Mechanochemical Functionalization of Carbon Black at Room Temperature

Mechanochemical Functionalization of Carbon Black at Room Temperature

Reactivity enhancement of gasification biochars for catalytic applications

Effect of Aliphatic Diamine Length Functionalized Silica Coated Iron Magnetic Nanoparticles on Metal Capacity and Speed of Cu(II) Uptake from Aqueous Media

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