Preparation of nanosize copper recycled from an electroplating wastewater

研究成果: Conference contribution

摘要

To better utilize copper recovered from an electroplating (EP) wastewater, a simple method of preparing valuable nanoparticles has been developed in the present work. Experimentally, about 40-50% of copper in the wastewater can be chelated with β-cyclodextrin (β-CD). The β-CD-Cu2+ complex was dried at 373 K for 24 hours and carbonized at 573 K for at least two hours to obtain the nanosize metallic copper (Cu) encapsulated in the carbon shells (Cu@C). The images observed by transmission electron microscopy (TEM) also indicate that the size of Cu in the Cu@C is in the range of 10-60 nm. The component fitted X-ray absorption near edge structure (XANES) spectra suggest that the chelated Cu2+ is reduced to form Cu as the hydroxyl groups of the β-CD are oxidized to H2O vapor during carbonization. By extended X-ray absorption fine structure (EXAFS) spectroscopy, it is found that the average coordination number (CN) of Cu in the Cu@C nanoparticles decreases along with the decrease of the size of Cu, i.e. the CN of the nanosize Cu (23 nm) is reduced to 8 comparing to 12 of the bulky Cu.

原文English
主出版物標題Nanotechnology 2010
主出版物子標題Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
頁面444-447
頁數4
出版狀態Published - 2010 十一月 9
事件Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 - Anaheim, CA, United States
持續時間: 2010 六月 212010 六月 24

出版系列

名字Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
1

Other

OtherNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
國家United States
城市Anaheim, CA
期間10-06-2110-06-24

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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