Parida KM, Dash SK. Adsorption of Cu2+ on spherical Fe-MCM-41 and its application for oxidation of adamantane.
JOURNAL OF HAZARDOUS MATERIALS 2010;
179:642-649. [PMID:
20395042 DOI:
10.1016/j.jhazmat.2010.03.051]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 03/10/2010] [Accepted: 03/12/2010] [Indexed: 05/29/2023]
Abstract
Fe-MCM-41 with varying Si/Fe ratios (20, 50, 70 and 90) were prepared by using cetyltrimethylammoniumbromide (CTAB) as the structure-directing agent (SDA), tetraethylorthosilicate (TEOS) as the silica source and ethanol as co-surfactant in alkaline medium. The characterization was done by SEM; UV-vis diffused reflectance and FT-IR. Adsorption of copper solutions with varying parameters such as concentration, temperature and pH were performed over Fe-MCM-41 samples. The experimental data fitted well to the Langmuir and Freundlich adsorption isotherm. Fe-MCM-41 having Si/Fe ratio (90) showed highest copper adsorption capacity at pH 5.5, Cu(2+) concentration of 59.6 ppm and temperature 323 K. Fe-MCM-41(90)-Cu(59.6) was tested as a catalyst for oxidation of adamantane using hydrogen peroxide as the oxidant. The GC analyses revealed significant conversion of 32.5% and selectivity of 54% towards formation of 1-adamantanol.
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