Synthesis of triphenylamine-based nanoporous organic polymers for highly efficient capture of SO<sub>2</sub> and CO<sub>2</sub>

Yan, Jun; Tan, Yan; Tong, Sihan; Zhu, JiangLi; Wang, Zefeng

doi:10.1039/d3py01215h

Cited by 4 publications

(16 citation statements)

References 51 publications

(101 reference statements)

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“…This finding underscores the critical role of substituent effects in modulating the adsorption properties of these materials. The SO 2 /CO 2 selectivity of NPAN-3 at 298 K and 100 kPa (87.7) was comparable to those of porous materials, as seen in Table S3, such as ANOPs (50.5−64.7), 11 DUTs (33− 37), 4 POPs (19.5−31.0), 44 TAM-POF (83), 45 HNIP-TBMBs (50−91), 36 XJ-COFs (39−118), 46 ELM-12 (30), 39 Fe-soc-MOF (32), 47 GU-1 (15.9, 296.2 K), 48 ECUT-11 (25.2, 1:99 (v/v) of SO 2 /CO 2 ), 49 and ECUT-Th-60 (27, 1:99 (v/v) of SO 2 /CO 2 ). 50 Adsorption of the Four NPANs for I 2 .…”

Section: ■ Results and Discussionsupporting

confidence: 56%

“…Wang et al reported the synthesis of a highly stable three-dimensional viologen-based porous organic framework that exhibits high selectivity for SO 2 /CO 2 (467 at 298 K and 100 kPa). Yan et al synthesized a triphenylamine-based NOP with a Brunauer–Emmett–Teller (BET) specific surface area of 1016 m 2 /g and an SO 2 adsorption capacity of 21.9 mmol/g. All of the studies discussed above emphasize the significance of introducing nitrogen-containing functional groups into NOPs to provide the polymers with additional adsorption sites and enhance the adsorption capacities of the polymers for toxic gases and iodine. − It is worth mentioning that NOPs are generally synthesized using expensive monomers and complex processes.…”

Section: Introductionmentioning

confidence: 99%

“…Yan et al synthesized a triphenylamine-based NOP with a Brunauer–Emmett–Teller (BET) specific surface area of 1016 m 2 /g and an SO 2 adsorption capacity of 21.9 mmol/g. All of the studies discussed above emphasize the significance of introducing nitrogen-containing functional groups into NOPs to provide the polymers with additional adsorption sites and enhance the adsorption capacities of the polymers for toxic gases and iodine. − It is worth mentioning that NOPs are generally synthesized using expensive monomers and complex processes. Therefore, nitrogen-rich NOPs that are synthesized using cheap monomers and simple polymerization are notably attractive adsorbents for toxic gases and radioactive pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Tong,

Wang,

Yan

2024

ACS Appl. Polym. Mater.

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Investigating the relationship between the substituent groups of nanoporous organic polymers and the adsorption capacities of the polymers for SO 2 , NH 3 , CO 2 , and I 2 is a significant challenge. In this study, four nanoporous polyaminal networks (NPANs) with methyl or phenyl substituent groups were prepared, and they demonstrated high adsorption capacities for SO 2 , NH 3 , CO 2 , and I 2 . The four NPANs, which were referred to as NPAN-1, NPAN-2, NPAN-3, and NPAN-4, were fabricated via a one-pot polycondensation method by using inexpensive p-phthalaldehyde (p-PDA) or m-phthalaldehyde (m-PDA) and 6methyl-1,3,5-triazine-2,4-diamine (MTDA) or 2,4-diamino-6-phenyl-1,3,5-triazine (DAPT). The NPANs had a dense aminal-rich structure and stable nanoporosity, which contributed to their high adsorption capacities for SO 2 , NH 3 , CO 2 , and I 2 and their high SO 2 /CO 2 selectivities. Notably, the SO 2 adsorption capacities, NH 3 adsorption capacities, CO 2 adsorption capacities, and I 2 adsorption capacities of NPAN-1 and NPAN-3, which were NPANs with electron-donating methyl groups, were higher than those of NPAN-2 and NPAN-4, which were NPANs with electron-withdrawing phenyl groups. This result indicated that the introduction of electron-donating groups into an NPAN enhanced the electron density of the nitrogen atoms in the polyaminal network, leading to increases in the adsorption capacities of the NPAN for SO 2 , NH 3 , CO 2 , and I 2 . This study offers important insights into the design and synthesis of NPANs with adjustable properties to tackle environmental and industrial challenges.

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Section: ■ Results and Discussionsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Tong,

Wang,

Yan

2024

ACS Appl. Polym. Mater.

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“…Triphenylamine (TPA)-based POPs have a special appeal among POPs because of their potential to tolerate high levels of heat, which are frequently encountered in industrialized CO 2 capture operations. They also do not break down easily when other gasses are present [31][32][33][34][35][36][37]. Notably, TPA's steric and electronic properties are flexible enough to affect CO 2 capture effectiveness [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Selective Capturing of the CO2 Emissions Utilizing Ecological (3-Mercaptopropyl)trimethoxysilane-Coated Porous Organic Polymers in Composite Materials

Kotp,

Kuo

2024

Polymers

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Capturing carbon dioxide (CO2) is still a major obstacle in the fight against climate change and the reduction of greenhouse gas emissions. To address this problem, we employed a simple Friedel–Crafts alkylation to investigate the effectiveness of porous organic polymers (POPs) based on triphenylamine (TPA) and trihydroxy aryl terms derived from chloranil (CH), designated as TPA-CH POP. We then treated the TPA-CH POP with (3-mercaptopropyl)trimethoxysilane (3-MPTS), forming a TPA-CH POP-SH nanocomposite to enhance CO2 capture. Utilizing FTIR, solid-state NMR, SEM, TEM, along with XPS techniques, the molecular makeup, morphological characteristics, as well as physical features of TPA-CH POP and the TPA-CH POP-SH nanocomposite were thoroughly explored. Upon scorching to 800 °C, the TPA-CH POP-SH nanocomposite demonstrated more thermal durability over TPA-CH POP, achieving a char yield of up to 71.5 wt.%. The TPA-CH POP-SH nanocomposite displayed a 2.5-times better CO2 capture, as well as a comparable adsorption capacity of 48.07 cm3 g−1 at 273 K. Additionally, we found that the TPA-CH POP-SH nanocomposite exhibited an improved CO2/nitrogen (N2) selectivity versus the original TPA-CH POP. Typical enthalpy changes for CO2 capture were somewhat increased by the 3-MPTS coating, indicating greater binding energies between CO2 molecules and the adsorbent surface. Our outcomes demonstrate that a TPA-CH POP composite coated with MPTS is a viable candidate for effective CO2 capture uses. Our findings encourage the investigation of different functional groups and optimization strategies.

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“…14 The POP-Py exhibited a notable SO 2 capacity of 10.8 mmol g −1 , but an SO 2 /CO 2 selectivity of only 31.0. Our group synthesized two triphenylamine-based NOPs through the self-condensation of 4-(N,Ndiphenylamino)benzaldehyde and 4′-(diphenylamino)biphenyl-4-carbaldehyde, demonstrating an SO 2 adsorption amount of 10.9 mmol g −1 at 100 kPa and 298 K. 8 The NOPs described in the literature have demonstrated a high adsorption capacity for SO 2 , yet they exhibit limited selectivity toward CO 2 or N 2 . Therefore, the challenge remains in designing and preparing NOPs with both high SO 2 adsorption uptake and selectivity for practical applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Selective SO₂ Capture by Triazine-Functionalized Triphenylamine-Based Nanoporous Organic Polymers

Tong,

Zhu,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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The emissions of sulfur dioxide (SO 2 ) from combustion exhaust gases pose significant risks to public health and the environment due to their harmful effects. Therefore, the development of highly efficient adsorbent polymers capable of capturing SO 2 with high capacity and selectivity has emerged as a critical challenge in recent years. However, existing polymers often exhibit poor SO 2 /CO 2 and SO 2 /N 2 selectivity. Herein, we report two triazine-functionalized triphenylamine-based nanoporous organic polymers (ANOP-6 and ANOP-7) that demonstrate both good SO 2 uptake and high SO 2 /CO 2 and SO 2 /N 2 selectivity. These polymers were synthesized through cost-effective Friedel−Crafts reactions using cyanuric chloride, 3,6-diphenylaminecarbazole, and 2,2′,7,7′-tetrakis(diphenylamino)-9,9′-spirobifluorene. The resultant ANOPs are composed of triazine and triphenylamine units and feature an ultramicroporous structure. Remarkably, ANOPs exhibit impressive adsorption capacities for SO 2 , with uptakes of approximately 3.31−3.72 mmol•g −1 at 0.1 bar, increasing to 9.52−9.94 mmol•g −1 at 1 bar. The static adsorption isotherms effectively illustrate the ability of ANOPs to separate SO 2 from SO 2 /CO 2 and SO 2 /N 2 mixtures. At 298 K and 1 bar, ANOP-6 shows outstanding selectivity toward SO 2 /CO 2 (248) and SO 2 /N 2 (13146), surpassing all previously reported triazine-based nanoporous organic polymers. Additionally, dynamic breakthrough tests demonstrate the superior separation properties of ANOPs for SO 2 from an SO 2 /CO 2 /N 2 mixture. ANOPs exhibit a breakthrough time of 73.1 min•g −1 and a saturated SO 2 capacity of 0.53 mmol•g −1 . These results highlight the exceptional adsorption properties of ANOPs for SO 2 , indicating their promising potential for the highly efficient capture of SO 2 from flue gas.

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Synthesis of triphenylamine-based nanoporous organic polymers for highly efficient capture of SO₂ and CO₂

Abstract: The fabrication of nanoporous organic polymers (NOPs) for the highly efficient capture of sulfur dioxide (SO2) and carbon dioxide (CO2) through the self-polymerization of an AB2 monomer presents significant challenges....

Cited by 4 publications

References 51 publications

Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Selective Capturing of the CO2 Emissions Utilizing Ecological (3-Mercaptopropyl)trimethoxysilane-Coated Porous Organic Polymers in Composite Materials

Highly Selective SO₂ Capture by Triazine-Functionalized Triphenylamine-Based Nanoporous Organic Polymers

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Synthesis of triphenylamine-based nanoporous organic polymers for highly efficient capture of SO2 and CO2

Abstract: The fabrication of nanoporous organic polymers (NOPs) for the highly efficient capture of sulfur dioxide (SO2) and carbon dioxide (CO2) through the self-polymerization of an AB2 monomer presents significant challenges....

Cited by 4 publications

References 51 publications

Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Tuning the Adsorption Capacities of Nanoporous Polyaminal Networks through Substituent Groups

Selective Capturing of the CO2 Emissions Utilizing Ecological (3-Mercaptopropyl)trimethoxysilane-Coated Porous Organic Polymers in Composite Materials

Highly Selective SO2 Capture by Triazine-Functionalized Triphenylamine-Based Nanoporous Organic Polymers

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Synthesis of triphenylamine-based nanoporous organic polymers for highly efficient capture of SO₂ and CO₂

Highly Selective SO₂ Capture by Triazine-Functionalized Triphenylamine-Based Nanoporous Organic Polymers