Selective adsorption towards heavy metal ions on the green synthesized polythiophene/MnO2 with a synergetic effect

Chen, Jie; Dong, Ruibing; Song, Chen; Tang, Duanlian; Lou, Xiaoyu; Ye, Changshen; Qiu, Ting; Yan, Wei

doi:10.1016/j.jclepro.2022.130536

Cited by 49 publications

(10 citation statements)

References 38 publications

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“…These adsorption isotherm data were thereafter analyzed by the Langmuir or Freundlich model to acquire the isotherm parameters (Figures (a–c) and S15, Table ). It showed that the Langmuir model could describe these data batter than the Freundlich model by considering the R 2 value, indicating that the adsorption of the mercury ions on these PTPAC was a single-layer adsorption …”

Section: Resultsmentioning

confidence: 99%

“…It showed that the Langmuir model could describe these data batter than the Freundlich model by considering the R 2 value, indicating that the adsorption of the mercury ions on these PTPAC was a single-layer adsorption. 53 The maximum adsorption capacities Q m were calculated to be 217.4, 294.2, and 294.1 mg g −1 for PTPAC-800, PTPAC-900, and PTPAC-1000 at 25 °C and could be further improved to 416.7, 434.8, and 384.6 mg g −1 with the adsorption temperature increasing to 35 °C but slightly decreased to 370.4, 357.1, and 312.5 mg g −1 when the temperature was overimproved to 45 °C. R L (R L = 1/(1 + K L C 0 )) was applied to examine the feasibility of our PTPAC in the mercury adsorption, which could be categorized into four types of adsorption based on the values: (1) a 0 < R L < 1 showed a favorable adsorption; (2) a R L > 1 showed a unfavorable adsorption; (3) a R L = 1 stands for a linear adsorption, and (4) a R L = 0 showed an irreversible adsorption.…”

Section: Table 2 Kinetic Parameters Of Ptpac-xmentioning

confidence: 99%

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Conjugated Microporous Poly(aniline) Enabled Hierarchical Porous Carbons for Hg(II) Adsorption

et al. 2022

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Hierarchical porous carbons equipped with heteroatoms and diffusion pores have a wide application prospect in adsorption. Herein, we report N-autodoped porous carbons (PTPACs), which were derived from rigid N-rich conjugated microporous poly(aniline)s (CMPAs) and show their all-around applicability in heavy metal adsorption. Their molecular structure could be delicately tuned from 3D organic networks to graphitic carbons through simply adjusting the pyrolysis temperature, affording unique hybrid features of hierarchical micro-meso-macroporosity and amount-tunable nitrogen defects, as validated by the enhanced CO2 adsorption capacities reaching 5.0 mmol g–1, a 230% increase compared to the precursor (2.15 mmol g–1). They therefore show promising a Langmuir adsorption capacity of 434.8 mg g–1 toward mercury ions, which could be rapidly achieved within a short 20 min. Based on the comprehensive experimental, characterization, and DFT calculation studies, we rationally reveal these impressive adsorptions arise from the hybrid function of chemisorption contributed by populated nitrogen defects and physical adsorption achieved by synergistic functions in the diffusion and storage pores. Outcomes mark the high merits of PTPACs in addressing recent global challenges in environmental engineering.

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Section: Resultsmentioning

confidence: 99%

Section: Table 2 Kinetic Parameters Of Ptpac-xmentioning

confidence: 99%

Conjugated Microporous Poly(aniline) Enabled Hierarchical Porous Carbons for Hg(II) Adsorption

et al. 2022

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“…Using the quench MD method as mentioned above, the lowest energetic mode of a single molecule of each component was exhibited and its corresponding binding energy was calculated. The binding energy ( E bind ) expresses the interaction between components, and it is calculated using the following equation [19]:

E_{bind} goodbreak= E_{tot} - ((), E_{Zn ((), II)} goodbreak+ E_{(OC - AMAM - CO)})

where E tot represents the total energy of the most stable orientation of each component for surface absorption. E Zn(II) and E (OC‐AMAM‐CO) represent the energies of surfaces of unbounded Zn (II) and (OC‐AMAM‐CO), respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Using the quench MD method as mentioned above, the lowest energetic mode of a single molecule of each component was exhibited and its corresponding binding energy was calculated. The binding energy (E bind ) expresses the interaction between components, and it is calculated using the following equation [19]:…”

Section: Computational Detailsmentioning

confidence: 99%

Designing of Zn (II)‐based novel coordination polymer (CP): Synthesis, characterization, and heavy metal removal from water

Baraka

Sheashea

Gado

et al. 2022

Applied Organom Chemis

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A new coordination polymer, Zn‐(OC‐AMAM‐CO) CP, has been synthesized from Zn (II) as ionic node and 2,2′‐((1,2‐phenylenebis [azanediyl])bis (carbonyl))dibenzoic acid, (OC‐AMAM‐CO), as a new linker, where (OC‐AMAM‐CO) has been synthesized as an amide product through condensation reaction of phthalic acid and o‐phenylenediamine. The amide product (OC‐AMAM‐CO) and Zn‐(OC‐AMAM‐CO) CP were characterized via FTIR and PXRD analyses, and Zn‐(OC‐AMAM‐CO) CP was further characterized via SEM/EDX and XPS analyses. Moreover, DFT study was performed to shed light on the both structures of (OC‐AMAM‐CO) and Zn‐(OC‐AMAM‐CO). PXRD analysis revealed the successful syntheses of the new linker (OC‐AMAM‐CO) and Zn‐(OC‐AMAM‐CO) CP where the new CP is crystalline. DFT study revealed that the 3D topological structure assembled through coordination, π–π stacking, and hydrogen bonding. Zn‐(OC‐AMAM‐CO) CP was applied as an adsorbent for the removal of Cu (II) from water as it has abundant chelating groups that serve as adsorptive coordinating sites. Isotherm study revealed the obedience of Cu (II)/Zn‐(OC‐AMAM‐CO) CP adsorption system to Langmuir modeling with adsorption capacity of about 55 mg/g. A kinetic study showed that the rate of adsorption was a pseudo‐first‐order type. Further, adsorption process was found to be strongly diffusion dependent.

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“…This unique characteristic of the adsorbent brought the ease in the diffusion and migration for MB molecules. Moreover, the stretched polymer chains have a high efficiency for the combination reaction between -COONa groups and MB molecules [32][33][34].…”

Section: Dye Adsorption and Swellingmentioning

confidence: 99%

Contribution Evaluation of Physical Hole Structure, Hydrogen Bond, and Electrostatic Attraction on Dye Adsorption through Individual Experiments

Wang

Zhang

et al. 2023

Adsorption Science & Technology

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Disagreements over various unanswered questions about contribution of the adsorption process and functional groups on dye adsorption still exist. The main aim of this research was to evaluate the contributions of physical hole structure, hydrogen bond, and electrostatic attraction on dye adsorption. Three ideal representatives, namely, a sponge with porous structure, P(AM) containing -CONH2 groups, and P(AANa/AM) containing -COONa groups, were chosen to evaluate the above contributions. The methylene blue (MB) removal rates of these three products were compared through individual experiments. The results revealed that physical hole structure did not play a role in decreasing dye concentration. Hydrogen bond existed in dye adsorption but did not remarkably reduce dye concentration. The excellent removal results of P(AANa/AM) demonstrated that electrostatic attraction was critical in enriching dye contaminants from the solution into solid adsorbent. The results could provide insights into the dye adsorption mechanisms for further research.

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Selective adsorption towards heavy metal ions on the green synthesized polythiophene/MnO2 with a synergetic effect

Cited by 49 publications

References 38 publications

Conjugated Microporous Poly(aniline) Enabled Hierarchical Porous Carbons for Hg(II) Adsorption

Conjugated Microporous Poly(aniline) Enabled Hierarchical Porous Carbons for Hg(II) Adsorption

Designing of Zn (II)‐based novel coordination polymer (CP): Synthesis, characterization, and heavy metal removal from water

Contribution Evaluation of Physical Hole Structure, Hydrogen Bond, and Electrostatic Attraction on Dye Adsorption through Individual Experiments

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