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Oxygen electroreduction on MN4-macrocycle modified graphene/multi-walled carbon nanotube composites

30-Aug-2015 | Author(s): Karl-Kalev Türk, Ivar Kruusenberg, Jayanta Mondal, Protima Rauwel, Jekaterina Kozlova, Leonard ..., Journal of Electroanalytical Chemistry, 2015

Publication date: 1 November 2015 Source:Journal of Electroanalytical Chemistry, Volume 756 Author(s): Karl-Kalev Türk, Ivar Kruusenberg, Jayanta Mondal, Protima Rauwel, Jekaterina Kozlova, Leonard Matisen, Väino Sammelselg, Kaido Tammeveski In this work the electrocatalysis ...

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Removal of Antimonite (Sb(III)) and Antimonate (Sb(V)) from Aqueous Solution Using Carbon Nanofibers That Are Decorated with Zirconium Oxide (ZrO2)

28-Aug-2015 | Jinming Luo; Xubiao Luo; John Crittenden; Jiuhui Qu; Yaohui Bai; Yue Peng; Junhua Li, Environmental Science & Technology, 2015

Zirconium oxide (ZrO2)-carbon nanofibers (ZCN) were fabricated and batch experiments were used to determine antimonite (Sb(III)) and antimonate (Sb(V)) adsorption isotherms and kinetics. ZCN have a maximum Sb(III) and Sb(V) adsorption capacity of 70.83 and 57.17 mg/g, respectively. The adsorption ...

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Enhanced Salt Removal in an Inverted Capacitive Deionization Cell Using Amine Modified Microporous Carbon Cathodes

27-Aug-2015 | Xin Gao; Ayokunle Omosebi; James Landon; Kunlei Liu, Environmental Science & Technology, 2015

Microporous SpectraCarb carbon cloth was treated using nitric acid to enhance negative surface charges of COO– in a neutral solution. This acid-treated carbon was further modified by ethylenediamine to attach −NH2 surface functional groups, resulting in positive surface charges of −NH3+ via ...

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Shape-Controlled Synthesis of Mn2O3 Hollow Structures and their Catalytic Properties

26-Aug-2015 | Ruiting Dong; Honglei Wang; Quan Zhang; Xuetang Xu; Fan Wang; Bin Li, CrystEngComm, 2015

A series of MnCO3 and MnC2O4 microstructures were fabricated via a self-templated method, in which carbon spheres obtained by carbonization process in the same solution were served as core and template. The shape of carbon@MnCO3/MnC2O4 evolved from rhombi to ellipsoids, to dumbbells, and to ...

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Controlling Short-Range Interactions by Tuning Surface Chemistry in HDPE/Graphene Nanoribbon Nanocomposites

25-Aug-2015 | Soheil Sadeghi; Alireza Zehtab Yazdi; Uttandaraman Sundararaj, Journal of Physical Chemistry B, 2015

Unique dispersion states of nanoparticles in polymeric matrices have the potential to create composites with enhanced mechanical, thermal, and electrical properties. The present work aims to determine the state of dispersion from the melt-state rheological behavior of nanocomposites based on ...

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Synthesis, spectral, optical and photocatalytic properties of vanadium- and carbon-doped titanium dioxide with three-dimensional architecture of aggregates

23-Aug-2015 | Author(s): I.V. Baklanova, V.N. Krasil’nikov, V.P. Zhukov, O.I. Gyrdasova, M.V. Kuznetsov, L.Yu. Buldako ..., Journal of Photochemistry and Photobiology A: Chemistry, 2015

Publication date: 1 January 2016 Source:Journal of Photochemistry and Photobiology A: Chemistry, Volume 314 Author(s): I.V. Baklanova, V.N. Krasil’nikov, V.P. Zhukov, O.I. Gyrdasova, M.V. Kuznetsov, L.Yu. Buldakova, M.Yu. Yanchenko Vanadium-doped and vanadium- and carbon-doped ...

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An efficient top-down approach for the fabrication of large aspect ratio g-C3N4 nanosheets with enhanced photocatalytic activities

19-Aug-2015 | Jincheng Tong; LI Zhang; Fei Li; Mingming Li; Shaokui Cao, Physical Chemistry Chemical Physics, 2015

Graphitic carbon nitride (g-C3N4) nanosheets with large aspect ratios were fabricated from bulk g-C3N4 powder through an efficient top-down approach of moderate disintegration-exfoliation using H2SO4 as an “efficient knife”. By prior disintegration in a diluted aqueous solution of H2SO4, the ...

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Preparation of solid-solution type Fe–Co nanoalloys by synchronous deposition of Fe and Co using dual arc plasma guns

19-Aug-2015 | Masaaki Sadakiyo; Minako Heima; Tomokazu Yamamoto; Syo Matsumura; Masashi Matsuura; S Sugimoto; Kenichi Kato; Masaki ..., Dalton Transactions, 2015

We succeeded in the efficient preparation of well-dispersed Fe–Co nanoalloys (NAs) using the arc plasma deposition method. Synchronous shots of dual arc plasma guns were applied to a carbon support to prepare the solid-solution type Fe–Co NAs having an approximately 1:1 atomic ratio. The alloy ...

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Chemical Shielding Anisotropies for Chloroform Exchanging between a Free Site and a Complex with Cryptophane-D: A Cross-Correlated NMR Relaxation Study

19-Aug-2015 | Emilie Steiner; Thierry Brotin; Zoltan Takacs; Jozef Kowalewski, Journal of Physical Chemistry B, 2015

The case of 13C-labeled chloroform exchanging between a free site in solution and the encaged site within the cryptophane-D cavity is investigated using the measurements of longitudinal cross-correlated relaxation rates, involving the interference of the dipole–dipole and chemical shielding ...

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Weak‐Acid Sites Catalyze the Hydrolysis of Crystalline Cellulose to Glucose in Water: Importance of Post‐Synthetic Functionalization of the Carbon Surface

14-Aug-2015 | Anh The To, Po‐Wen Chung, Alexander Katz, Angewandte Chemie International Edition, 2015

Abstract The direct hydrolysis of crystalline cellulose to glucose in water without prior pretreatment enables the transformation of biomass into fuels and chemicals. To understand which features of a solid catalyst are most important for this transformation, the nanoporous carbon material ...

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