Journal
CHEMICAL ENGINEERING JOURNAL
Volume 242, Issue -, Pages 285-293Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2013.12.089
Keywords
Monodisperse; Micrometer-sized; Hierarchical; Porous carbon spheres; Catalyst
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Funding
- National Natural Science Foundation of China [21172001]
- Program for the NCET [NCET-10-0004]
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Monodisperse, micrometer-sized, hierarchically porous carbon spheres (PCS) were successfully fabricated by employing a hard template under hydrothermal condition and followed by further carbonization. D-Glucose and porous polymer microspheres modified with N-methyl-D-glucamine (NMGA) were used as carbon source and template, respectively. The porous carbon spheres were characterized by scanning electron microscopy, X-ray powder diffraction, and N-2 adsorption-desorption measurements. The results reveal that the PCS with amorphous colloidal structure are highly monodispersed and have a hierarchically pore size distribution. PCS with these features are excellent matrix for loading noble-metal nanoparticles. The PCS adsorb gold precursors and sub-sequently generate in situ Au nanoparticles (AuNPs). The deposited AuNPs with the size of 15-30 nm are well dispersed in PCS' pores. The resulting gold-carbon (Au/C) composite microspheres show high performance toward the reduction of 4-nitrophenol (4-NP). (C) 2014 Elsevier B.V. All rights reserved.
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