Journal ArticleDOI
Characterisation of the surface of oxidised carbon adsorbents
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TLDR
The surface reactivity and functional group content of a series of oxidised active carbons has been assessed by elemental analysis, electrophoretic mobility measurements and potentiometric titrations.About:
This article is published in Carbon.The article was published on 2002-01-01. It has received 178 citations till now. The article focuses on the topics: Adsorption & Carboxylic acid.read more
Citations
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Effect of Low-Temperature Pyrolysis Conditions on Biochar for Agricultural Use
TL;DR: In this paper, the authors evaluated the agronomic potential of biochar produced from poultry litter, peanut hulls, and pine chips produced at 400°C and 500°C with or without steam activation.
Journal ArticleDOI
Understanding Aqueous Dispersibility of Graphene Oxide and Reduced Graphene Oxide through pKa Measurements
TL;DR: It is shown that r-GO sheets have ionizable groups with a single pK value (8.0) while GO sheets have groups that are more acidic (pK = 4.3), in addition to groups with pK values of 6.6 and 9.0.
Journal ArticleDOI
Surface functional groups of carbon-based adsorbents and their roles in the removal of heavy metals from aqueous solutions: A critical review.
Xiaodong Yang,Yongshan Wan,Yulin Zheng,Feng He,Zebin Yu,Jun Huang,Hailong Wang,Yong Sik Ok,Yinshan Jiang,Bin Gao +9 more
TL;DR: This work provides a comprehensive review of recent research on various carbon adsorbents in terms of their surface functional groups and the associated removal behaviors and performances to heavy metals in aqueous solutions.
Journal ArticleDOI
Enhanced acidity and pH-dependent surface charge characterization of successively oxidized graphite oxides
TL;DR: In this article, a pH-potentiometric study explores the factors influencing the surface charge developed in aqueous dispersions of graphite oxide (GO) after a series of oxidation treatments.
References
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Journal ArticleDOI
Some aspects of the surface chemistry of carbon blacks and other carbons
TL;DR: In this paper, a review of the surface chemistry of carbon blacks and other activated carbons is given, focusing on surface oxides with emphasis on the chemical methods used in the assessment and identification of surface functional groups.
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The importance of active surface area in the carbon-oxygen reaction1,2
TL;DR: In this article, the authors measured the coverage of the surface with oxygen complex upon exposure of the samples to O2 at 300 deg for 24 hours, and calculated the unoccupied active surface area of the oxidized samples.
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Characterization of oxygen-containing surface complexes created on a microporous carbon by air and nitric acid treatment
TL;DR: In this article, the nature and extent of oxygen functional groups present on the surface of a microporous carbon has been studied and four characteristic groups of oxygen complexes were defined on the basis of the decomposition product gases and the thermal stabilities of the complex.
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Modification of the surfaces of a gasactivated carbon and a chemically activated carbon with nitric acid, hypochlorite, and ammonia
TL;DR: In this article, a gas-activated carbon and a chemically activated carbon were chemically modified by oxidation with nitric acid or hypochlorite, and the parent and modified carbons and chars were characterized by different techniques, such as acid/base adsorption, TGA/MS, FT-IR, and porosimetry.
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Evolution of carbon structure in chemically activated wood
TL;DR: In this article, NMR and FTIR analyses have been employed to follow the evolution of chemical structure in relation to porosity development, as a function of heat treatment temperature (HTT), for activated carbons produced from white oak by phosphoric acid activation.