Cited by 252Adsorption and biosorption for pollutant removalThermochemical Biomass Conversion ProcessesAdsorption, diffusion, and thermodynamic properties of materials

One-step synthesis of a novel N-doped microporous biochar derived from crop straws with high dye adsorption capacity

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Lian, Fei, Cui, Guannan, Liu, Zhongqi, Duo, Lian, Zhang, Guilong, Xing, Baoshan·2016·Journal of Environmental Management

Abstract

N-doping is one of the most promising strategies to improve the adsorption capacity and selectivity of carbon adsorbents. Herein, synthesis, characterization and dye adsorption of a novel N-doped microporous biochar derived from direct annealing of crop straws under NH3 is presented. The resultant products exhibit high microporosity (71.5%), atomic percentage of nitrogen (8.81%), and adsorption capacity to dyes, which is about 15-20 times higher than that of original biochar. Specifically, for the sample NBC800-3 pyrolyzed at 800°C in NH3 for 3 h, its adsorption for acid orange 7 (AO7, anionic) and methyl blue (MB, cationic) is up to 292 mg g(-1) and 436 mg g(-1), respectively, which is among the highest ever reported for carbonaceous adsorbents. The influences of N-doping and porous structure on dye adsorption of the synthesized carbons are also discussed, where electrostatic attraction, π-π electron donor-accepter interaction, and Lewis acid-base interaction mainly contribute to AO7 adsorption, and surface area (especially pore-filling) dominates MB adsorption. The N-doped biochar can be effectively regenerated and reused through direct combustion and desorption approaches.

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Crossref · 10.1016/j.jenvman.2016.03.043

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  • Lian et al. manufactured N-doped microporous biochar from crop straws pyrolyzed at 800 °C with ammonia purging for 3 h, which exhibited high micropore volume (71.5%) and nitrogen content (8.81 at.%).

    “Lian et al. manufactured a N-doped microporous biochar from crop straws pyrolyzed at 800 °C with ammonia purging for 3 h, which exhibited high micropore volume (71.5%) and nitrogen content (8.81 at.%).”
  • The N dopants generated under NH3 purging in Lian et al.'s biochar were only employed as basic sites for adsorption of anionic dye molecules.

    “The N dopants generated under NH3 purging were only employed as basic sites for the adsorption of anionic dye molecules.164”

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Authors
Lian, F., Cui, G., Liu, Z., Duo, L., Zhang, G., & Xing, B.
Affiliations
  • University of Massachusetts Amherst (US)
  • Tianjin Normal University (CN)
  • Agro-Environmental Protection Institute (CN)
Corresponding author
Lian, Fei
Venue
Journal of Environmental Management
Publisher
Elsevier BV
Published
2016-07
Volume
176
Pages
61-68
ISSN
0301-4797 (ISSN-L)
OpenAlex
W2315083932
Cited by
252
References
33
Citations by year
2026: 20 · 2025: 20 · 2024: 35 · 2023: 29 · 2022: 42 · 2021: 35 · 2020: 32 · 2019: 14 · 2018: 10 · 2017: 12 · 2016: 2
FWCI
7.50
Type
journal article
Language
en
Open access
Locations
  • Journal of Environmental Management (acceptedVersion)
  • PubMed (publishedVersion)
Funders
  • Science and Technology Project of Chinese Academy of Agricultural Sciences
  • National Natural Science Foundation of China (41573127, 41203083)
  • Agro-Environmental Protection Institute
  • Ministry of Agriculture
  • Tianjin Natural Science Foundation (13JCYBJC25400)
  • USDA NIFA McIntire-Stennis Program (MAS 00028)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Chemistry › Spectroscopy › Adsorption, diffusion, and thermodynamic properties of materials
Keywords
N-doped biochar, crop straw, microporous carbon, dye adsorption, ammonia activation, Acid Orange 7, methyl blue, adsorption mechanism, electrostatic attraction, π-π electron donor-acceptor interactions, Lewis acid-base interactions, adsorbent regeneration, biomass pyrolysis
MeSH terms
Adsorption, Ammonia, Azo Compounds, Benzenesulfonates, Charcoal, Coloring Agents, Feasibility Studies, Nitrogen, Porosity, Plant Stems

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