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.
| Original language | English |
|---|---|
| Pages (from-to) | 103-110 |
| Number of pages | 8 |
| Journal | Science of the Total Environment |
| Volume | 612 |
| DOIs | |
| Publication status | Published - 2018 Jan 15 |
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Keywords
- Catalytic reduction
- Electron shuttle
- Engineered biochar
- Glucose
- Nitrogen doping
- p-Nitrophenol
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
Cite this
Synthesis of cobalt-impregnated carbon composite derived from a renewable resource : Characterization and catalytic performance evaluation. / Cho, Dong Wan; Jeong, Kwang Hwa; Kim, Sohyun; Tsang, Daniel C.W.; Ok, Yong Sik; Song, Hocheol.
In: Science of the Total Environment, Vol. 612, 15.01.2018, p. 103-110.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of cobalt-impregnated carbon composite derived from a renewable resource
T2 - Characterization and catalytic performance evaluation
AU - Cho, Dong Wan
AU - Jeong, Kwang Hwa
AU - Kim, Sohyun
AU - Tsang, Daniel C.W.
AU - Ok, Yong Sik
AU - Song, Hocheol
PY - 2018/1/15
Y1 - 2018/1/15
N2 - 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.
AB - 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.
KW - Catalytic reduction
KW - Electron shuttle
KW - Engineered biochar
KW - Glucose
KW - Nitrogen doping
KW - p-Nitrophenol
UR - http://www.scopus.com/inward/record.url?scp=85028028825&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028028825&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2017.08.187
DO - 10.1016/j.scitotenv.2017.08.187
M3 - Article
AN - SCOPUS:85028028825
VL - 612
SP - 103
EP - 110
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
ER -