Preparation of nanosize copper recycled from an electroplating wastewater

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationNanotechnology 2010
Subtitle of host publicationAdvanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
Pages444-447
Number of pages4
Publication statusPublished - 2010 Nov 9
EventNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 - Anaheim, CA, United States
Duration: 2010 Jun 212010 Jun 24

Publication series

NameNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
Volume1

Other

OtherNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
CountryUnited States
CityAnaheim, CA
Period10-06-2110-06-24

Fingerprint

electroplating
Electroplating
Copper
Wastewater
coordination number
copper
preparation
Extended X ray absorption fine structure spectroscopy
Nanoparticles
nanoparticles
carbonization
Cyclodextrins
Carbonization
X ray absorption
Hydroxyl Radical
x rays
Carbon
fine structure
Vapors
vapors

All Science Journal Classification (ASJC) codes

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

Cite this

Huang, C. H., Wang, H-P., & Sun, I-W. (2010). Preparation of nanosize copper recycled from an electroplating wastewater. In Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 (pp. 444-447). (Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010; Vol. 1).
Huang, C. H. ; Wang, Hong-Paul ; Sun, I-Wen. / Preparation of nanosize copper recycled from an electroplating wastewater. Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010. 2010. pp. 444-447 (Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010).
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abstract = "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.",
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Huang, CH, Wang, H-P & Sun, I-W 2010, Preparation of nanosize copper recycled from an electroplating wastewater. in Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010. Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010, vol. 1, pp. 444-447, Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010, Anaheim, CA, United States, 10-06-21.

Preparation of nanosize copper recycled from an electroplating wastewater. / Huang, C. H.; Wang, Hong-Paul; Sun, I-Wen.

Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010. 2010. p. 444-447 (Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010; Vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Preparation of nanosize copper recycled from an electroplating wastewater

AU - Huang, C. H.

AU - Wang, Hong-Paul

AU - Sun, I-Wen

PY - 2010/11/9

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N2 - 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.

AB - 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.

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M3 - Conference contribution

SN - 9781439834015

T3 - Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010

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EP - 447

BT - Nanotechnology 2010

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Huang CH, Wang H-P, Sun I-W. Preparation of nanosize copper recycled from an electroplating wastewater. In Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010. 2010. p. 444-447. (Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010).