TY - JOUR
T1 - Speciation of copper in micropores
AU - Huang, Y. J.
AU - Wang, H. Paul
AU - Hsiao, M. C.
AU - Tai, C. C.
AU - Huang, Hsin Liang
AU - Liu, S. H.
N1 - Funding Information:
The financial support of the National Science Council, Taiwan is gratefully acknowledged. We also thank Dr. J. F. Lee and Prof. Y. W. Yang of the Taiwan SRRC for their EXAFS experimental assistances.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/3
Y1 - 2004/3
N2 - Speciation of copper in the micropores of zeolites and a contaminated soil was studied by extended X-ray absorption fine structural (EXAFS) spectroscopy. The Fourier transformed EXAFS data showed that copper oxide in zeolites ZSM-5 and ZSM-48 possessed a Cu-O bond distance of 1.95 Å with coordination numbers (CNs) of 1-2. Since ZSM-5 and ZSM-48 possessed channel openings of 5-6 Å, the possible sizes of the linear-type copper oxides in these confined pores were 2.93-2.95 Å. However, in the supercages (∼13 Å) and channels (7.4 Å) of zeolite Y, a three dimensional structure of CuO was observed. Interestingly, we found that CuO in the Cu-contaminated soil had a similar structure to that in ZSM-5 or ZSM-48. Nevertheless, the EXAFS data indicated that the CNs of Cu-O and Cu-O-Cu were 0.4 and 0.3, respectively, suggesting a highly perturbed copper oxide in the irregular micropores of the contaminated soil.
AB - Speciation of copper in the micropores of zeolites and a contaminated soil was studied by extended X-ray absorption fine structural (EXAFS) spectroscopy. The Fourier transformed EXAFS data showed that copper oxide in zeolites ZSM-5 and ZSM-48 possessed a Cu-O bond distance of 1.95 Å with coordination numbers (CNs) of 1-2. Since ZSM-5 and ZSM-48 possessed channel openings of 5-6 Å, the possible sizes of the linear-type copper oxides in these confined pores were 2.93-2.95 Å. However, in the supercages (∼13 Å) and channels (7.4 Å) of zeolite Y, a three dimensional structure of CuO was observed. Interestingly, we found that CuO in the Cu-contaminated soil had a similar structure to that in ZSM-5 or ZSM-48. Nevertheless, the EXAFS data indicated that the CNs of Cu-O and Cu-O-Cu were 0.4 and 0.3, respectively, suggesting a highly perturbed copper oxide in the irregular micropores of the contaminated soil.
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U2 - 10.1023/B:WATE.0000019941.13703.0a
DO - 10.1023/B:WATE.0000019941.13703.0a
M3 - Article
AN - SCOPUS:1842790612
SN - 0049-6979
VL - 153
SP - 187
EP - 194
JO - Water, Air, and Soil Pollution
JF - Water, Air, and Soil Pollution
IS - 1-4
ER -