Preparation of highly porous nitrogen-doped biochar derived from birch tree wastes with superior dye removal performance

Reis, Glaydson S. dos; Bergna, Davide; Grimm, Alejandro; Lima, Éder C.; Hu, Tao; Naushad, Mu.; Lassi, Ulla

doi:10.1016/j.colsurfa.2023.131493

Cited by 69 publications

(14 citation statements)

References 47 publications

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“…We explored the kinetics using nonlinear pseudo-first-order, pseudo-second-order, and Avrami-fractional order (Figure A and Table S3), using R 2 adj and SD values to statistically assess the fitness of the kinetic model . It can be seen from the experimental results that the pseudo-second-order kinetic model R 2 adj is closer to 1 and the SD value is lower, so it is most suitable for describing the kinetic adsorption of I 2 on TTA-DMTP-COF …”

Section: Resultsmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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With the rapid development of the nuclear industry, the effective treatment of radioactive iodine has become an urgent and challenging task. In this article, we synthesized a nanoporous nitrogen-rich covalent organic framework (TTA-DMTP-COF) with a specific surface area of up to 2332 m2/g for the adsorption of iodine (I2) and methyl iodide (CH3I). Adsorption experiments showed that TTA-DMTP-COF exhibited effective I2 and CH3I adsorption properties; the maximum adsorption capacity of I2 is as high as 2.59 g·g–1, and the maximum adsorption capacity of CH3I is 1.60 g·g–1. In addition, TTA-DMTP-COF can effectively adsorb iodine from an iodine–cyclohexane solution, and the adsorption amount is as high as 516.46 mg/g. Mechanistic studies have shown that I2 and CH3I enter the nanopores of COF materials and form charge transfer complexes with various functional groups in TTA-DMTP-COF (including imines, triazine moieties, and residual amino groups). The N-methylation reaction specifically binds CH3I to the nucleophilic N site and generates polyiodides during the adsorption process. Our work demonstrates that TTA-DMTP-COF is an excellent candidate material capable of capturing radioactive iodine from air and solution in harsh environments.

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Section: Resultsmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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“…The Raman spectra of SB-Biochar and SB-N-Biochar are displayed in Figure 4 . The common peaks at 1315 and 1600 cm −1 are related to D (defects) and G (sp 2 hybridized carbon atoms in the form of graphite) peaks, respectively [ 18 , 19 ]. From these peaks, I D /I G can be calculated to yield useful information on the degree of graphitization and the level of disorder in the carbon arrangement structure [ 18 , 19 ].…”

Section: Resultsmentioning

confidence: 99%

“…It is reported that the introduction of heteroatoms in the carbon framework leads to more defects. This may be responsible for boosting the doped material’s adsorptive features because defects can act as active adsorption sites [ 18 , 19 ].…”

Section: Resultsmentioning

confidence: 99%

“…Good adsorption ability is also associated with the material’s surface properties, due to the presence of surface functionalities. To boost the surface activity of any carbon material, heteroatom doping has been proven to be a successful strategy [ 18 , 19 , 20 ]. Heteroatom doping strategies using cheap and abundant elements such as nitrogen (N) have become very popular because they do indeed boost the product’s adsorptive performance in adsorbing organic pollutants, including dyes.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization, and Adsorption Properties of Nitrogen-Doped Nanoporous Biochar: Efficient Removal of Reactive Orange 16 Dye and Colorful Effluents

Ekman,

dos Reis,

Laisné

et al. 2023

Nanomaterials

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In this work, nitrogen-doped porous biochars were synthesized from spruce bark waste using a facile single-step synthesis process, with H3PO4 as the chemical activator. The effect of nitrogen doping on the carbon material’s physicochemical properties and adsorption ability to adsorb the Reactive Orange 16 dye and treat synthetic effluents containing dyes were evaluated. N doping did not cause an important impact on the specific surface area values, but it did cause an increase in the microporosity (from 19% to 54% of micropores). The effect of the pH showed that the RO-16 reached its highest removal level in acidic conditions. The kinetic and equilibrium data were best fitted by the Elovich and Redlich–Peterson models, respectively. The adsorption capacities of the non-doped and doped carbon materials were 100.6 and 173.9 mg g−1, respectively. Since the biochars are highly porous, pore filling was the main adsorption mechanism, but other mechanisms such as electrostatic, hydrogen bond, Lewis acid-base, and π-π between mechanisms were also involved in the removal of RO-16 using SB-N-Biochar. The adsorbent biochar materials were used to treat synthetic wastewater containing dyes and other compounds and removal efficiencies of up to 66% were obtained. The regeneration tests have demonstrated that the nitrogen-doped biochar could be recycled and reused easily, maintaining very good adsorption performance even after five cycles. This work has demonstrated that N-doped biochar is easy to prepare and can be employed as an efficient adsorbent for dye removal, helping to open up new solutions for developing sustainable and effective adsorption processes to tackle water contamination.

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“…Additionally, high-temperature pyrolysis also increases the defects in the material. Glaydson et al's research also indicates that N doping significantly alters the pore structure of the material (primarily mesopores) and increases the surface defects of the material [64]. The enriched pore structure enables the loading of a large number of active components, and the increased defects also play a role in anchoring the active species.…”

Section: In Situ Doping Methodsmentioning

confidence: 99%

Research Advances on Nitrogen-Doped Carbon Materials in COx Hydrogenation

Deng,

Xu,

et al. 2023

Atmosphere

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The excessive consumption of fossil fuels has resulted in massive carbon emissions and serious ecological and environmental crises. Therefore, achieving the efficient utilization of waste carbon sources is considered as an important pathway to addressing the aforementioned issues in the context of carbon neutrality. Developing and designing suitable catalyst materials has become the key to converting COx into valuable platform chemicals and value-added liquid fuels (e.g., CO, CH4, CH3OH, and C2+ hydrocarbons). A moderate interaction between nitrogen-doped carbon materials and active metals is more favorable for the progress of the COx hydrogenation reaction compared to traditional metal oxide carriers. In this work, we comprehensively summarize the synthesis methods of N-doped carbon materials and the relevant research progress in the field of COx hydrogenation. In addition, a general assessment of carbon-based catalysts for COx hydrogenation reactions, concerning the support and metal properties, the activity and product selectivity, and their interactions is systematically discussed. Finally, this review discusses the roles of N-doped carbon materials, the current challenges, and future development directions.

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Preparation of highly porous nitrogen-doped biochar derived from birch tree wastes with superior dye removal performance

Cited by 69 publications

References 47 publications

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Synthesis, Characterization, and Adsorption Properties of Nitrogen-Doped Nanoporous Biochar: Efficient Removal of Reactive Orange 16 Dye and Colorful Effluents

Research Advances on Nitrogen-Doped Carbon Materials in COx Hydrogenation

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