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Shu-hong Yu - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of an attapulgite clay carbon nanocomposite adsorbent by a hydrothermal Carbonization Process and their application in the removal of toxic metal ions from water
    Langmuir, 2011
    Co-Authors: Li Feng Chen, Hai-wei Liang, Yang Lu, Shu-hong Yu
    Abstract:

    A new kind of attapulgite clay@carbon (ATP@C) nanocomposite adsorbent has been synthesized by a one-pot hydrothermal Carbonization Process under mild conditions using two cheap, ecofriendly materials (i.e., attapulgite clay (ATP), which is a magnesium aluminum silicate that is abundant in nature, and glucose, which is a green chemical obtained from biomass). Compared to carbon-based materials, this new ATP@C nanocomposite exhibits a high adsorption ability for Cr(VI) and Pb(II) ions with maximum adsorption capacities of 177.74 and 263.83 mg·g–1, respectively. The results demonstrate that this nanocomposite is an exceptionally promising candidate as a low-cost, sustainable, and effective adsorbent for the removal of toxic ions from water.

  • Synthesis of an attapulgite clay@carbon nanocomposite adsorbent by a hydrothermal Carbonization Process and their application in the removal of toxic metal ions from water
    Langmuir, 2011
    Co-Authors: Li Feng Chen, Chun Hua Cui, Hai-wei Liang, Yang Lu, Shu-hong Yu
    Abstract:

    A new kind of attapulgite clay@carbon (ATP@C) nanocomposite adsorbent has been synthesized by a one-pot hydrothermal Carbonization Process under mild conditions using two cheap, ecofriendly materials (i.e., attapulgite clay (ATP), which is a magnesium aluminum silicate that is abundant in nature, and glucose, which is a green chemical obtained from biomass). Compared to carbon-based materials, this new ATP@C nanocomposite exhibits a high adsorption ability for Cr(VI) and Pb(II) ions with maximum adsorption capacities of 177.74 and 263.83 mg·g–1, respectively. The results demonstrate that this nanocomposite is an exceptionally promising candidate as a low-cost, sustainable, and effective adsorbent for the removal of toxic ions from water.

  • Engineering carbon materials from the hydrothermal Carbonization Process of biomass
    Advanced Materials, 2010
    Co-Authors: Bo Hu, Liheng Wu, Shu-hong Yu, Markus Antonietti, Kan Wang, Maria Magdalena Titirici
    Abstract:

    Energy shortage, environmental crisis, and developing customer demands have driven people to find facile, low-cost, environmentally friendly, and nontoxic routes to produce novel functional materials that can be commercialized in the near future. Amongst various techniques, the hydrothermal Carbonization (HTC) Process of biomass (either of isolated carbohydrates or crude plants) is a promising candidate for the synthesis of novel carbon-based materials with a wide variety of potential applications. In this Review, we will discuss various synthetic routes towards such novel carbon-based materials or composites via the HTC Process of biomass. Furthermore, factors that influence the Carbonization Process will be analyzed and the special chemical/physical properties of the final products will be discussed. Despite the lack of a clear mechanism, these novel carbonaceous materials have already shown promising applications in many fields such as carbon fixation, water purification, fuel cell catalysis, energy storage, CO2 sequestration, bioimaging, drug delivery, and gas sensors. Some of the most promising examples will also be discussed here, demonstrating that the HTC Process can rationally design a rich family of carbonaceous and hybrid functional carbon materials with important applications in a sustainable fashion.

Adri C. T. Van Duin - One of the best experts on this subject based on the ideXlab platform.

  • Atomistic Scale Analysis of the Carbonization Process for C/H/O/N-Based Polymers with the ReaxFF Reactive Force Field
    The journal of physical chemistry. B, 2019
    Co-Authors: Malgorzata Kowalik, Chowdhury Ashraf, Behzad Damirchi, Dooman Akbarian, Siavash Rajabpour, Adri C. T. Van Duin
    Abstract:

    During the Carbonization Process of raw polymer precursors, graphitic structures can evolve. The presence of these graphitic structures affects mechanical properties of the carbonized carbon fibers...

  • Atomistic scale analysis of the Carbonization Process for C/H/O/N-based polymers with the ReaxFF reactive force field
    arXiv: Chemical Physics, 2019
    Co-Authors: Malgorzata Kowalik, Chowdhury Ashraf, Behzad Damirchi, Dooman Akbarian, Siavash Rajabpour, Adri C. T. Van Duin
    Abstract:

    During the Carbonization Process of raw polymer precursors, graphitic structures can evolve. The presence of these graphitic structures affects mechanical properties of the carbonized carbon fibers. To gain a better understanding of the chemistry behind the evolution of these structures, we performed atomistic scale simulations using the ReaxFF reactive force field. Three different polymers were considered as a precursor: idealized ladder PAN (polyacrylonitrile), a proposed oxidized PAN and PBO (poly(p-phenylene-2,6-benzobisoxazole)). We determined the underlying molecular details of polymers conversion into a carbon fiber structure. Since these are C/H/O/N-based polymers, we first developed an improved force field for C/H/O/N chemistry based on the Density Functional Theory (DFT) data with a particular focus on N2 formation kinetics and its interactions with polymer-associated radicals formed during the Carbonization Process. Then, using this improved force field, we performed atomistic scale simulations of the initial stage of the Carbonization Process for the considered polymers. Based on our simulation data we determined the molecular pathways for the formation of low-molecular weight gas-species, all-carbon rings crucial for further graphitic structures evolution and possible alignment of the evolved all-carbon 6-membered rings clusters.

Li Feng Chen - One of the best experts on this subject based on the ideXlab platform.

Xue-yun Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Investigations on Carbonization Processes of plain tobacco stems and H3PO4-impregnated tobacco stems used for the preparation of activated carbons with H3PO4 activation
    Industrial Crops and Products, 2008
    Co-Authors: Jinhui Peng, Libo Zhang, Hongying Xia, Kunbin Yang, Xue-yun Zhu
    Abstract:

    Abstract In order to elucidate the mechanism of Carbonization Process of tobacco stems-based activated carbons with H 3 PO 4 -activation, the pyrolysis characteristics of plain tobacco stems and H 3 PO 4 -impregnated tobacco stems were investigated through thermogravimetry (TG) at different heating rates (5, 15, 30 K/min) under nitrogen atmosphere. Based on TG curves, the kinetic parameters of the Processes, including pre-exponential factors and activation energies, were calculated using the method of Coats–Redfern. The pyrolytic kinetic models of plain tobacco stems and H 3 PO 4 -impregnated tobacco stems were set up. The main pyrolysis stage could be described by the first-order and 2.5-order global models for plain tobacco stems and H 3 PO 4 -impregnated tobacco stems, respectively. The results indicated that the activation energy of Carbonization Process of H 3 PO 4 -impregnated tobacco stems was lower about 32.67–38.71 kJ mol −1 than that of plain tobacco stems; furthermore, the kinetic parameters exhibited kinetic compensation effects.

Hai-wei Liang - One of the best experts on this subject based on the ideXlab platform.