کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
611905 880688 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation, characterization, and CuX2 and CoX2 (X = Cl−, Br−, ClO−4) adsorption behavior of a polyhedral oligomer silsesquioxane functionalized with an organic base
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Preparation, characterization, and CuX2 and CoX2 (X = Cl−, Br−, ClO−4) adsorption behavior of a polyhedral oligomer silsesquioxane functionalized with an organic base
چکیده انگلیسی

In this paper we report on the synthesis, characterization, and adsorption properties of the first 3-amino-1,2,4-triazole-modified porous silsesquioxane (ATPS). The isotherms of adsorption of MX2 (M = Cu(II), Co(II); X = Cl−, Br−, ClO−4) by ATPS were studied in ethanol and aqueous solutions at 298 K. The results showed that there is a good fit between the experimental data and the Langmuir isotherm. The adsorption capacity in both solvents followed the sequence Cu(II) ≫ Co(II). The lowest adsorption for Co(II) should be related to the largest hydration volume, which obstructs the adsorption capacity of the surface, and consequently causes a decrease in the number of cations adsorbed. For the salts with different anions the sequence was MCl2 > MBr2 > M(ClO4)2 in both solvents. The low affinity for M(ClO4)2 toward the solid phase is a consequence of the poorer coordination ability of the ClO−4. Adsorptions from ethanol solutions were higher than those from aqueous solutions due to the higher polarity of water, which can more strongly solvate the solute and the basic sites on the surface. The following adsorption capacities (in mmol g−1) were determined: 0.24 (aq) and 0.84 (eth) for CuCl2, 0.09 (aq) and 0.16 (eth) for CuBr2, and 0.08 (aq) and 0.11 (eth) for Cu(ClO4)2; 0.02 (aq) and 0.07 (eth) for CoCl2, 0.02 (aq) and 0.06 (eth) for CoBr2, and 0.01 (aq) and 0.05 (eth) for Co(ClO4)2.

Synthesis, characterization, and adsorption properties of the first 3-amino-1,2,4-triazole-modified porous silsesquioxane.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 313, Issue 1, 1 September 2007, Pages 34–40
نویسندگان
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