Shouchun Zhang

Northeast Institute of Geography and Agroecology, Beijing, Beijing Shi, China

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Publications (5)21.07 Total impact

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    ABSTRACT: A hierarchical microporous carbon material with a Brunauer-Emmett-Teller surface area of 1348 m(2) g(-1) and a pore volume of 0.67 cm(3) g(-1) was prepared from yeast through chemical activation with potassium hydroxide. This type of material contains large numbers of nitrogen-containing groups (nitrogen content >5.3 wt%), and, consequently, basic sites. As a result, this material shows a faster adsorption rate and a higher adsorption capacity of CO(2) than the material obtained by directly carbonizing yeast under the same conditions. The difference is more pronounced in the presence of N(2) or H(2)O, showing that chemical activation of discarded yeast with potassium hydroxide could afford high-performance microporous carbon materials for the capture of CO(2).
    ChemSusChem 06/2012; 5(7):1274-9. · 7.48 Impact Factor
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    ABSTRACT: Hierarchical porous activated carbon fibers with a BET surface area of 2231 m2 g−1 and a pore volume of 1.16 cm3 g−1 were made from polyacrylonitrile through pre-oxidation and chemical activation. This type of material contains a large amount of nitrogen-containing groups (N content > 8.1 wt%) and consequently basic sites, resulting in a faster adsorption rate and a higher adsorption capacity for CO2 than pure carbon materials with analogous structures under the same conditions. Moreover, its adsorption capacity for CO2 was more than 3.3-times higher than that for N2. In particular, it showed a much higher CO2 adsorption capacity than zeolite 13X, which is conventionally used to capture CO2, in the presence of H2O.
    Journal of Materials Chemistry 08/2011; 21(36):14036-14040. · 5.97 Impact Factor
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    ABSTRACT: Bimodal mesoporous carbon nitride is synthesized using Triton X-100 as a template and melamine and glutaraldehyde as precursors through polymerization and carbonization. The structures and surface chemical properties of carbon nitrides are characterized and compared by nitrogen adsorption isotherms, TG, FT-IR spectra and SEM images. The results show that the mesopore sizes in the carbon nitride are centered at 3.8 nm and 10–40 nm. The pyrolysis and decomposition of the polymer to form the condensation cross-linking ring structures takes place at 350–700 °C. The nitrogen atom in the carbon nitride exists in C–N and N–H states. As a Candida rugosa lipase immobilization support, the mesoporous carbon nitride displays a higher amount of immobilization and improves the thermal stability of Candida rugosa lipase, which still displays higher catalytic activity after 4 runs.
    Journal of Materials Chemistry 03/2011; 21(11):3890-3894. · 5.97 Impact Factor
  • Shuwei Chen, Wenzhong Shen, Shouchun Zhang
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    ABSTRACT: Resorcinol and formaldehyde were used as carbon precursors, poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer was employed as a soft template, and tetraethylorthosilicate-generated silica was used as hard templates to synthesize spherical mesoporous carbon. The resulting spherical mesoporous carbons were characterized by nitrogen adsorption–desorption isotherms and electron microscopy (SEM and TEM) and used as electrode materials for aqueous electric double-layer capacitors. The average diameters of spherical particles ranged from 2 to 7 μm and the mesopore was ca 2 nm. The highest specific surface area of 1,000 m2/g and mesopore volume of 0.86 cm3/g was obtained. The specific capacitance of 130 F/g was obtained by means of galvanostatic charging/discharging and cycle voltammetry.
    Journal of Sol-Gel Science and Technology 01/2011; · 1.66 Impact Factor
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    ABSTRACT: Amylose and amylopectin were pyrolyzed at 400 °C and then oxidized with HNO3 and H2SO4 to modify its surface chemical properties. The pore structures and surface chemical properties of pyrolyzed carbons before and after oxidation were characterized and compared by nitrogen adsorption isotherms, thermogravimetric analysis, FT-IR spectra and SEM images. The results indicated that pore structures were hardly changed after oxidation, but the lactonic and phenolic groups could be markedly increased after oxidation, and the adsorption capacities for ammonia and carbon sulfide were enhanced.
    Colloids and Surfaces A: Physicochemical and Engineering Aspects. 01/2010;

Publication Stats

5 Citations
21.07 Total Impact Points

Institutions

  • 2011–2012
    • Northeast Institute of Geography and Agroecology
      • • Institute of Coal Chemistry
      • • Key Laboratory of Carbon Materials
      Beijing, Beijing Shi, China
  • 2010–2012
    • Chinese Academy of Sciences
      • • Key Laboratory of Carbon Materials
      • • State Key Laboratory of Coal Conversion
      Peping, Beijing, China