Binary doping of nitrogen and phosphorus into porous carbon: A novel di-functional material for enhancing CO2 capture and super-capacitance

Wang, Yuan; Xiao, Jianfei; Wang, Hanzhi; Zhang, Tian C.; Yuan, Shaojun

doi:10.1016/j.jmst.2021.05.035

Cited by 75 publications

(35 citation statements)

References 45 publications

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“…[56]. As shown in Figure 5c, the deconvoluted N 1s spectrum for unactivated GO(0.25)/MR results in two peaks at 399.5 and 401.5 eV, which can be attributed to amino/imino nitrogen and quaternary nitrogen, respectively [57,58]. After activation at 400−600 • C, the peak of amino/imino-N disappeared and three new peaks at 398.7, 400.1 and 403.2 eV appeared, attributable to pyridinic-N, pyrrolic-N and oxidized-N, respectively [59,60].…”

Section: Resultsmentioning

confidence: 90%

“…The deconvolution of O 1s spectra for activated samples at 400-700 °C results five different peaks with BEs at 530.8, 532.1, 533.3, 534.3 and 536.1 eV, corresponding to C=O, O=C−N, C−O, O=C-O and adsorbed water, respectively [56]. As shown in Figure 5c, the deconvoluted N 1s spectrum for unactivated GO(0.25)/MR results in two peaks at 399.5 and 401.5 eV, which can be attributed to amino/imino nitrogen and quaternary nitrogen, respectively [57,58]. After activation at 400−600 °C, the peak of amino/imino-N disappeared and three new peaks at 398.7, 400.1 and 403.2 eV appeared, attributable to pyridinic-N, pyrrolic-N and oxidized-N, respectively [59,60].…”

Section: Resultsmentioning

confidence: 94%

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Nitrogen-Doped Porous Carbon Materials Derived from Graphene Oxide/Melamine Resin Composites for CO2 Adsorption

et al. 2021

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CO2 adsorption in porous carbon materials has attracted great interests for alleviating emission of post-combustion CO2. In this work, a novel nitrogen-doped porous carbon material was fabricated by carbonizing the precursor of melamine-resorcinol-formaldehyde resin/graphene oxide (MR/GO) composites with KOH as the activation agent. Detailed characterization results revealed that the fabricated MR(0.25)/GO-500 porous carbon (0.25 represented the amount of GO added in wt.% and 500 denoted activation temperature in °C) had well-defined pore size distribution, high specific surface area (1264 m2·g−1) and high nitrogen content (6.92 wt.%), which was mainly composed of the pyridinic-N and pyrrolic-N species. Batch adsorption experiments demonstrated that the fabricated MR(0.25)/GO-500 porous carbon delivered excellent CO2 adsorption ability of 5.21 mmol·g−1 at 298.15 K and 500 kPa, and such porous carbon also exhibited fast adsorption kinetics, high selectivity of CO2/N2 and good recyclability. With the inherent microstructure features of high surface area and abundant N adsorption sites species, the MR/GO-derived porous carbon materials offer a potentially promising adsorbent for practical CO2 capture.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 94%

Nitrogen-Doped Porous Carbon Materials Derived from Graphene Oxide/Melamine Resin Composites for CO2 Adsorption

et al. 2021

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“…It is evident and undeniable that each material has its own individual limitations hindering their large-scale deployment, i.e., (i) MOFs show outstanding features including easily tunable and tailored structures, well-defined pore properties, and high recyclability [20]; however, they are high-cost materials in terms of production, making them economically unviable, and also their stability is compromised in the presence of moisture [21]. (ii) Porous carbon materials, and in particular, their heteroatom-doped counterparts, have emerged as promising CO 2 uptake candidates [22,23]. The heteroatom improves the electronegativity of the material enhancing the CO 2 capture; however, there is an important discrepancy about the CO 2 binding mechanisms, as it is yet controversial whether the micropore distribution and not the heteroatom doping that determines the CO 2 capture and CO 2 /N 2 selectivity [24].…”

Section: Introductionmentioning

confidence: 99%

APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

et al. 2021

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In this work, we have described the characterization of hybrid silica nanoparticles of 50 nm size, showing outstanding size homogeneity, a large surface area, and remarkable CO2 sorption/desorption capabilities. A wide battery of techniques was conducted ranging from spectroscopies such as: UV-Vis and IR, to microscopies (SEM, AFM) and CO2 sorption/desorption isotherms, thus with the purpose of the full characterization of the material. The bare SiO2 (50 nm) nanoparticles modified with 3-aminopropyl (triethoxysilane), APTES@SiO2 (50 nm), show a remarkable CO2 sequestration enhancement compared to the pristine material (0.57 vs. 0.80 mmol/g respectively at 50 °C). Furthermore, when comparing them to their 200 nm size counterparts (SiO2 (200 nm) and APTES@SiO2 (200 nm)), there is a marked CO2 capture increment as a consequence of their significantly larger micropore volume (0.25 cm3/g). Additionally, ideal absorbed solution theory (IAST) was conducted to determine the CO2/N2 selectivity at 25 and 50 °C of the four materials of study, which turned out to be >70, being in the range of performance of the most efficient microporous materials reported to date, even surpassing those based on silica.

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“…With an increase in hydrothermal reaction temperature ( Figure 2 a) and time ( Figure S1a ), some peaks within 1000–1500 cm −1 were more difficult to distinguish. The main characteristic FTIR bands were observed to include −OH, P=O, C−O, C−C, and C−N groups [ 9 , 25 , 26 ]. The stretching vibration of O−H in the hydroxyl groups and carboxyl groups leads to the appearance of peaks at 3454 cm −1 and 1641 cm −1 , respectively [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Single-Step Hydrothermal Synthesis of Biochar from H3PO4-Activated Lettuce Waste for Efficient Adsorption of Cd(II) in Aqueous Solution

et al. 2022

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Developing an ideal and cheap adsorbent for adsorbing heavy metals from aqueous solution has been urgently need. In this study, a novel, effective and low-cost method was developed to prepare the biochar from lettuce waste with H3PO4 as an acidic activation agent at a low-temperature (circa 200 °C) hydrothermal carbonization process. A batch adsorption experiment demonstrated that the biochar reaches the adsorption equilibrium within 30 min, and the optimal adsorption capacity of Cd(II) is 195.8 mg∙g−1 at solution pH 6.0, which is significantly improved from circa 20.5 mg∙g−1 of the original biochar without activator. The fitting results of the prepared biochar adsorption data conform to the pseudo-second-order kinetic model (PSO) and the Sips isotherm model, and the Cd(II) adsorption is a spontaneous and exothermic process. The hypothetical adsorption mechanism is mainly composed of ion exchange, electrostatic attraction, and surface complexation. This work offers a novel and low-temperature strategy to produce cheap and promising carbon-based adsorbents from organic vegetation wastes for removing heavy metals in aquatic environment efficiently.

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Binary doping of nitrogen and phosphorus into porous carbon: A novel di-functional material for enhancing CO2 capture and super-capacitance

Cited by 75 publications

References 45 publications

Nitrogen-Doped Porous Carbon Materials Derived from Graphene Oxide/Melamine Resin Composites for CO2 Adsorption

Nitrogen-Doped Porous Carbon Materials Derived from Graphene Oxide/Melamine Resin Composites for CO2 Adsorption

APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

Single-Step Hydrothermal Synthesis of Biochar from H3PO4-Activated Lettuce Waste for Efficient Adsorption of Cd(II) in Aqueous Solution

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