Synthesis of carbon nanotubes and porous carbons from printed circuit board waste pyrolysis oil.

The possibility and feasibility of using pyrolysis oil from printed circuit board (PCB) waste as a precursor for advanced carbonaceous materials is presented. The PCB waste was first pyrolyzed in a laboratory scale fixed bed reactor at 600 degrees C to prepare pyrolysis oil. The analysis of pyrolysis oil by gas chromatography-mass spectroscopy indicated that it contained a very high proportion of phenol and phenol derivatives. It was then polymerized in formaldehyde solution to synthesize pyrolysis oil-based resin which was used as a precursor to prepare carbon nanotubes (CNTs) and porous carbons. Scanning electron microscopy and transmission microscopy investigation showed that the resulting CNTs had hollow cores with outer diameter of approximately 338 nm and wall thickness of approximately 86 nm and most of them were filled with metal nanoparticles or nanorods. X-ray diffraction reveals that CNTs have an amorphous structure. Nitrogen adsorption isotherm analysis indicated the prepared porous carbons had a Brunauer-Emmett-Teller surface area of 1214 m(2)/g. The mechanism of the formation of the CNTs and porous carbons was discussed.

[1]  Aimin Li,et al.  Thermogravimetric analysis and kinetic study on large particles of printed circuit board wastes. , 2009, Waste management.

[2]  S. Tennison.  Phenolic-resin-derived activated carbons , 1998 .

[3]  Yan Song,et al.  Carbon Fibers and Films Based on Biomass Resins , 2005 .

[4]  K. Nishikawa,et al.  Effect of hot isostatic pressing on nanopore in glass-like carbon prepared from phenol–formaldehyde resin , 2001 .

[5]  Zhu-de Xu,et al.  Preparation of Fe-filled carbon nanotubes by catalytic decomposition of cyclohexane , 2002 .

[6]  L. C. Pardini,et al.  Structural evolution of Eucalyptus tar pitch-based carbons during carbonization , 2005 .

[7]  Valerio Cozzani,et al.  Formation of hydrogen bromide and organobrominated compounds in the thermal degradation of electronic boards , 2006 .

[8]  N. Kasahara,et al.  Heterogeneous graphitization of thin carbon fiber derived from phenol-formaldehyde resin , 2003 .

[9]  Anilesh Kumar,et al.  Synthesis and characterization of a nanofiltration carbon membrane derived from phenol–formaldehyde resin , 2003 .

[10]  I. Marco,et al.  Pyrolysis of electrical and electronic wastes , 2008 .

[11]  I. Stamatin,et al.  The synthesis of multi-walled carbon nanotubes (MWNTs) by catalytic pyrolysis of the phenol-formaldehyde resins , 2007 .

[12]  A. A. El-Hendawy.  An insight into the KOH activation mechanism through the production of microporous activated carbon for the removal of Pb2+ cations , 2009 .

[13]  Zichen Wang,et al.  Effects of activation conditions on preparation of porous carbon from rice husk , 2003 .

[14]  T. Campbell,et al.  Preparative methods of polymer chemistry , 1961 .

[15]  R. Tseng,et al.  Characterization and use of high surface area activated carbons prepared from cane pith for liquid-phase adsorption. , 2006, Journal of hazardous materials.

[16]  D. Zakharov,et al.  Carbon nanotubes from polyethylene precursors: Structure and structural changes caused by thermal and chemical treatment revealed by HREM , 1998 .

[17]  Paul T. Williams,et al.  Separation and recovery of materials from scrap printed circuit boards , 2007 .

[18]  H. Teng,et al.  Preparation of porous carbons from phenol–formaldehyde resins with chemical and physical activation , 2000 .

[19]  H. Matsuda,et al.  Preparation of activated carbon from phenolic resin by KOH chemical activation under microwave heating , 2009 .

[20]  J. Zima,et al.  The use of pyrolysis—gas chromatography / mass spectroscopy in the analysis of cured polyfunctional epoxy resins , 1991 .

[21]  Byung-Joo Kim,et al.  Novel porous carbons synthesized from polymeric precursors for hydrogen storage , 2008 .

[22]  Ting-Chien Chen,et al.  Pyrolysis characteristics of integrated circuit boards at various particle sizes and temperatures. , 2007, Journal of hazardous materials.

[23]  Haoquan Hu,et al.  Preparation of supported carbon molecular sieve membrane from novolac phenol–formaldehyde resin , 2007 .

[24]  J. Choma,et al.  KOH activation of mesoporous carbons obtained by soft-templating , 2008 .

[25]  Keqiang Qiu,et al.  A new technology for recycling materials from waste printed circuit boards. , 2010, Journal of hazardous materials.

[26]  Guido Grause,et al.  Pyrolysis of tetrabromobisphenol-A containing paper laminated printed circuit boards. , 2008, Chemosphere.