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Ahmad K, Afzaal M, Ritch JS, Chivers T, O’Brien P. Epitaxial CdTe Rods on Au/Si Islands from a Molecular Compound. J Am Chem Soc 2010; 132:5964-5. [DOI: 10.1021/ja1017943] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kibriya Ahmad
- The School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Mohammad Afzaal
- The School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Jamie S. Ritch
- The School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Tristram Chivers
- The School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Paul O’Brien
- The School of Chemistry and Materials Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
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Shin EW, Han JS, Jang M, Min SH, Park JK, Rowell RM. Phosphate adsorption on aluminum-impregnated mesoporous silicates: surface structure and behavior of adsorbents. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2004; 38:912-917. [PMID: 14968882 DOI: 10.1021/es030488e] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Phosphorus from excess fertilizers and detergents ends up washing into lakes, creeks, and rivers. This overabundance of phosphorus causes excessive aquatic plant and algae growth and depletes the dissolved oxygen supply in the water. In this study, aluminum-impregnated mesoporous adsorbents were tested for their ability to remove phosphate from water. The surface structure of the materials was investigated with X-ray diffraction (XRD), a N2 adsorption-desorption technique, Fourier transform-infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) to understand the effect of surface properties on the adsorption behavior of phosphate. The mesoporous materials were loaded with Al components by reaction with surface silanol groups. In the adsorption test, the Al-impregnated mesoporous materials showed fast adsorption kinetics as well as high adsorption capacities, compared with activated alumina. The uniform mesopores of the Al-impregnated mesoporous materials caused the diffusion rate in the adsorption process to increase, which in turn caused the fast adsorption kinetics. High phosphate adsorption capacities of the Al-impregnated mesoporous materials were attributed to not only the increase of surface hydroxyl density on Al oxide due to well-dispersed impregnation of Al components but also the decrease in stoichiometry of surface hydroxyl ions to phosphate by the formation of monodentate surface complexes.
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Affiliation(s)
- Eun Woo Shin
- USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, Wisconsin 53726-2398, USA.
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McGuire GE, Fuchs J, Han P, Kushmerick JG, Weiss PS, Simko SJ, Nemanich RJ, Chopra DR. Surface Characterization. Anal Chem 1999. [DOI: 10.1021/a19900159] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G. E. McGuire
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - J. Fuchs
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - P. Han
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - J. G. Kushmerick
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - P. S. Weiss
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - S. J. Simko
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - R. J. Nemanich
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
| | - D. R. Chopra
- Electronic Technologies Division, MCNC, 3021 Cornwallis Road, P.O. Box 12889, Research Triangle Park, North Carolina 27709
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Turner NH, Schreifels JA. Surface Analysis: X-ray Photoelectron Spectroscopy and Auger Electron Spectroscopy. Anal Chem 1998. [DOI: 10.1021/a19800139] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Noel H. Turner
- Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375-5342
| | - John A. Schreifels
- Department of Chemistry, George Mason University, Fairfax, Virginia 22030
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