TY - JOUR
T1 - Speciation of nano-copper collected in molecular sieves from chemical-mechanical planarization wastewater
AU - Huang, Hsin Liang
AU - Wang, H. Paul
N1 - Funding Information:
The financial support of the National Science Council and the Taiwan NSRRC are gratefully acknowledged. We also thank Dr. Y.W. Yang and Dr. Jyh-Fu Lee of the NSRRC for their EXAFS experimental assistance.
PY - 2005/6
Y1 - 2005/6
N2 - Experimentally, 70-80% of copper in the chemical-mechanical planarization (CMP) wastewater was abstracted in the molecular sieve MCM-41 and zeolites Y at 298 K (for 4 h). The least-square fitted X-ray absorption near edge structural (XANES) spectra showed that mainly CuO clusters (47%) and adsorbed copper (CuO) (22%) were abstracted in MCM-41. In zeolite Y, CuO clusters (42%), Cu 2+ (41%) and CuO (14%) were found. Moreover, about 20% of nano-CuO in the CMP wastewater were abstracted and formed as CuO clusters in the channels of MCM-41. The Fourier transformed extended X-ray absorption fine structural (EXAFS) data also indicated that the abstracted copper in MCM-41 or zeolite Y possessed CuO bond distances of 1.96-1.97 Å with a coordination number (CN) of 3.4.
AB - Experimentally, 70-80% of copper in the chemical-mechanical planarization (CMP) wastewater was abstracted in the molecular sieve MCM-41 and zeolites Y at 298 K (for 4 h). The least-square fitted X-ray absorption near edge structural (XANES) spectra showed that mainly CuO clusters (47%) and adsorbed copper (CuO) (22%) were abstracted in MCM-41. In zeolite Y, CuO clusters (42%), Cu 2+ (41%) and CuO (14%) were found. Moreover, about 20% of nano-CuO in the CMP wastewater were abstracted and formed as CuO clusters in the channels of MCM-41. The Fourier transformed extended X-ray absorption fine structural (EXAFS) data also indicated that the abstracted copper in MCM-41 or zeolite Y possessed CuO bond distances of 1.96-1.97 Å with a coordination number (CN) of 3.4.
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U2 - 10.1016/j.elspec.2005.01.220
DO - 10.1016/j.elspec.2005.01.220
M3 - Article
AN - SCOPUS:17444399732
SN - 0368-2048
VL - 144-147
SP - 307
EP - 309
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
ER -