Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74629
Title: Synthesis of cobalt-impregnated carbon composite derived from a renewable resource : characterization and catalytic performance evaluation
Authors: Cho, DW
Jeong, KH
Kim, S
Tsang, DCW 
Ok, YS
Song, H
Keywords: Catalytic reduction
Electron shuttle
Engineered biochar
Glucose
Nitrogen doping
P-Nitrophenol
Issue Date: 2018
Publisher: Elsevier
Source: Science of the total environment, 2018, v. 612, p. 103-110 How to cite?
Journal: Science of the total environment 
Abstract: A novel nitrogen-doped biochar embedded with cobalt (Co-NB) was fabricated via pyrolysis of glucose pretreated with melamine (N donor) and Co(II). The Co-NB showed high catalytic capability by converting p-nitrophenol (PNP) into p-aminophenol (PAP) by NaBH4. The analyses of FE-SEM, TEM, BET, XRD, Raman, and X-ray photoelectron spectroscopy XPS of the Co-NB showed hierarchical porous structure (BET 326.5 m2 g− 1 and pore volume: 0.2403 cm3 g− 1) with well-dispersed Co nanoparticles (20–60 nm) on the N-doped graphitic biochar surface. The Co-NB showed higher PNP reduction capability compared to the Co-biochar without N-doping, achieving 94.3% removal within 4 min at 0.24 g L− 1 catalyst dose and initial concentration of 0.35 mM PNP. Further conversion experiments under varying environmental conditions (e.g., NaBH4 concentration (7.5–30 mM), biochar dosage (0.12–1.0 g L− 1), initial PNP concentration (0.08–0.17 mM)) were conducted in batch mode. The reusability of Co-NB was validated by the repetitive conversion experiments (5 cycles). The overall results demonstrated biochar potential as catalysts for environmental applications if properly designed.
URI: http://hdl.handle.net/10397/74629
ISSN: 0048-9697
EISSN: 1879-1026
DOI: 10.1016/j.scitotenv.2017.08.187
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