Adsorption of ammonia on graphite oxide/aluminium polycation and graphite oxide/zirconium-aluminium polyoxycation composites

被引:43
作者
Seredych, Mykola [1 ]
Bandosz, Teresa J. [1 ]
机构
[1] CUNY City Coll, Dept Chem, New York, NY 10031 USA
关键词
graphite oxide; polyoxycations; composites; ammonia; porosity; surface chemistry;
D O I
10.1016/j.jcis.2008.04.062
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Graphite oxide (GO) synthesized from commercial graphite was modified with aluminium or zirconium-aluminium polyoxyrations and then calcined at 350 degrees C. On the samples obtained adsorption of ammonia from moist air was investigated. The surface of materials before and after exposure to ammonia was characterized using adsorption of nitrogen, XRD, SEM, FTIR, TA, CHN analysis, and potentiometric titration. The results showed that in spite of the fact that graphite composites/pillared graphites (PG) have Keggin-like ions located between the layers, that space blocked for nitrogen molecules used to determine the specific surface area. During calcinations, the deflagration of layers occurred as a result of decomposition of epoxy groups. This results in formation of disordered graphitic carbons with some mesoporosity. Even though these materials were not porous, the significant amount of ammonia was retained on the surface. Since ammonia molecule is able to specifically interact with oxygen groups of graphite oxide and Bronsted centers of inorganic pillars, it is likely intercalated between the composite layers. While the best performance was found for GO modified with aluminium-zirconium species, after calcinations the samples containing Keggin Al-13 like cations revealed the high capacity which is linked to the high acidity of incorporated inorganic compounds. (c) 2008 Published by Elsevier Inc.
引用
收藏
页码:25 / 35
页数:11
相关论文
共 50 条
[41]   Removal of ammonia by graphite oxide via its intercalation and reactive adsorption [J].
Seredych, Mykola ;
Bandosz, Teresa J. .
CARBON, 2007, 45 (10) :2130-2132
[42]   INTERACTIONS OF AMMONIA WITH GRAPHITE OXIDE [J].
SLABAUGH, WH ;
SEILER, BC .
JOURNAL OF PHYSICAL CHEMISTRY, 1962, 66 (03) :396-&
[43]  
STUMM W, 2001, CHEM SOLID WATER INT
[44]   Enhanced acidity and pH-dependent surface charge characterization of successively oxidized graphite oxides [J].
Szabó, T ;
Tombácz, E ;
Illés, E ;
Dékány, I .
CARBON, 2006, 44 (03) :537-545
[45]   DRIFT study of deuterium-exchanged graphite oxide [J].
Szabó, T ;
Berkesi, O ;
Dékány, I .
CARBON, 2005, 43 (15) :3186-3189
[46]   COMPRESSIBILITY OF METAL-AMMONIA SOLUTIONS [J].
THOMPSON, JC .
PHYSICAL REVIEW A-GENERAL PHYSICS, 1971, 4 (02) :802-&
[47]   Synthesis of poly(aniline-co-o-anisidine)-intercalated graphite oxide composite by delamination/reassembling method [J].
Wang, GC ;
Yang, ZY ;
Li, XW ;
Li, CZ .
CARBON, 2005, 43 (12) :2564-2570
[48]  
WEAST RC, 1986, HDB CHEM PHYS, pD144
[49]   Novel synthesis of layered graphite oxide-birnessite manganese oxide nanocomposite [J].
Yang, XJ ;
Makita, Y ;
Liu, ZH ;
Ooi, K .
CHEMISTRY OF MATERIALS, 2003, 15 (06) :1228-1231
[50]   NH3 adsorption on the Bronsted and Lewis acid sites of V2O5(010):: A periodic density functional study [J].
Yin, XL ;
Han, HM ;
Gunji, I ;
Endou, A ;
Ammal, SSC ;
Kubo, M ;
Miyamoto, A .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (22) :4701-4706