JOURNAL OF POROUS MATERIALS
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2026
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IF 3.2
Yang Liudong,Liu Li,Li Qunyan,Liu Junguo,Jing Ke,Wei Qi,Chen Wenjuan
Nitrogen-doped micro-mesoporous carbon nanospheres are considered as promising CO₂ adsorbents due to their remarkable efficiency and cost-effectiveness. In this work, nitrogen-doped micro-mesoporous carbon nanospheres were constructed, during which soft micelles (triblock copolymer P123) and a hard template (silica sol) as structural precursors were employed, and urea was used as the nitrogen source and KHCO₃ as the chemical activator. Through a combined chemical activation and post-doping strategy, ultra-micropores were successfully introduced into the carbon framework alongside rich nitrogen doping. The final nitrogen-doped micro-mesoporous carbon nanospheres exhibit high specific surface areas (529–2225 m²/g) and nitrogen contents ranging from 2.20 wt% to 6.02 wt%. The optimal sample, NMCNs-2K2U800, demonstrates excellent CO₂ adsorption performance, with capacities of 7.86 mmol/g at 0 ℃ and 4.31 mmol/g at 25 ℃ under 1 bar. This study systematically investigates the effects of activator and nitrogen source on the pore structure, nitrogen speciation, and CO₂ adsorption behavior of carbon materials. Further, a viable strategy for the controlled synthesis of porous carbons and providing valuable insights into the design of high-performance CO₂ adsorbents is provided.
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ACS Catalysis
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2026
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IF 13.6
Suiyang Dai,Jiahua Luo,Yuhan Zhou,Xin Liu,Yechao Su,Yabo Bian,Xueyan Sun,Ferenc Lónyi,Hongliang Li,Yongzhi Zhong,Jie Zeng
Ammonium bicarbonate (NH4HCO3) is a widely used nitrogen fertilizer that simultaneously offers nitrogen and carbon while consuming CO2 during its synthesis. Conventional NH4HCO3 production relies on the Haber−Bosch process to generate NH3 followed by CO2 neutralization, resulting in high pressure operating conditions (400−500 °C, 100−200 bar). Herein, we present a cascade plasma-thermal catalytic route that converts N2, H2O, and CO2 into NH4HCO3 under atmospheric pressure. In this process, non-thermal plasma activates N2 and H2O to generate NO and H2, bypassing thermodynamic constraints. The plasma-derived NO is then hydrogenated over Pt/HZSM-5 with supplementary H2 from water electrolysis to produce NH3. Finally, simultaneous CO2 absorption leads to the in situ formation of NH4HCO3, achieving a yield rate of 114.5 mmol h–1 at a discharge current of 0.4 A. This integrated approach offers a pathway for nitrogen fertilizer synthesis from air and water, representing a step toward carbon−nitrogen cycle coupling.
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Plasma Processes and Polymers
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2026
·Vol. 23
·期 6
·e70198
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IF 3.2
Kai Li,Jiajun Peng,Tianyu Liang,Feifan Zhang,Fangjie Zhou,Yuzhen Jin,Liancheng Zhang,Hua Pan,Fada Feng,Xuming Zhang
The reaction mechanism of plasma-catalytic CO 2 methanation remains unclear, especially regarding the Ni size effect. To address this, a tunable NiAl catalyst was explored. A linear correlation exists between methanation activity and Ni particle size: CO 2 conversion increases with larger Ni particles. The NiAl-300 catalyst (5.8 nm) achieved 86% CO 2 conversion and 100% CH 4 selectivity, while NiAl-500 (2.6 nm) reached only 63% and 98%, respectively. In situ DRIFTS revealed that larger Ni particles promote hydrogenation of formate and HCO species due to their efficient utilization of plasma-induced H radicals. This work provides theoretical support for rationally designing efficient catalysts in plasma-catalytic CO 2 methanation systems.
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Materials Research Express
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2018
·Vol. 5
·期 9
·095305
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IF 1.151
Shicheng Liu,Yiqiang Fan,Kexin Gao,Yajun Zhang
Cyclo-olefin polymer (COP) have unique physical and chemical properties, such as high glass transition temperature, low density, low water absorption, biocompatible and high UV transmission. This study proposed a low-cost and rapid approach for the fabrication of COP-based microfluidic devices using CO2 laser ablation. During the CO2 laser ablation on the surface of COP, the polymer material will meltdown, decompose and evaporate, resulting in a Gaussian-like cross-section profile in micro scale. This study also provided a detailed study for the depth and width of the laser ablated microchannels with various laser energy and scan speed. For the demonstration of the proposed technique, a droplet generator was fabricated and tested in this study. The proposed fabrication method for COP based microfluidic devices is low-cost, rapid, and has a great application prospects in the biological and medical fields.
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ENERGY
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2026
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IF 10.1
Lirong Li,Jiaying Wu,Zhiping Xiao,Chengwei Xu,Chuang Meng
The high energy consumption of CO 2 capture technologies stems largely from the limited efficiency of the adsorbents and the energy-intensive regeneration process, posing a major barrier to large-scale deployment. This study provides a robust material solution through the first synthesis and energetic evaluation of a stable CAU-10-PDC metal-organic framework, marking a significant step beyond its previously conceptualized membrane forms. By substituting the original benzene-dicarboxylate linkers in CAU-10 with pyridine-3,5-dicarboxylate ligands, we engineered a framework with tailored 4.15 Å pore channels that exhibits exceptional thermal stability up to 397 °C and a high BET surface area of 896.9 m 2 /g. The material achieves high CO 2 uptake of 5.05 mmol/g at 273 K and 4.01 mmol/g at 298 K, along with outstanding cyclic stability (>99.9% capacity retention over 10 TVSA cycles). Multiscale simulations further reveal a low isosteric enthalpy of 26.25 kJ/mol, confirming an energy-efficient physisorption mechanism. This low regeneration energy requirement, coupled with the identification of preferential CO 2 binding at pyridinic nitrogen sites (binding energy: −8.44 kJ/mol), positions CAU-10-PDC as a promising candidate for next-generation CO 2 capture systems like direct air capture (DAC). Our work provides the first comprehensive dataset for CAU-10-PDC and offers an atomistic blueprint for designing high-performance, low-energy adsorbents.
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TRANSACTIONS OF TIANJIN UNIVERSITY
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2026
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IF 7.8
Hao Shengzhong,Yan Xudong,Yin Haochun,Wang Hongqi,Yu Jiaxin,Bai Linlu
The topological nanopores of covalent organic frameworks (COFs) are promising platforms for constructing photocatalytic nanoreactors for CO 2 conversion. However, simultaneously increasing electron density, promoting electron transfer, and enhancing CO 2 adsorption and activation within confined nanopore spaces remain critical challenges for boosting photocatalytic performance. Herein, polyhydroxylated fullerene (C 60 OH) molecules were assembled within the nanopores of a two-dimensional porphyrin-based COF (pCOF) through hydrogen-bonding interactions with the hydroxyl-functionalized 2,5-dihydroxyterephthalaldehyde (DHTA) acceptor units in the pCOF, thereby constructing a C 60 OH@pCOF photocatalytic nanoreactor featuring DHTA–C 60 OH molecular heterojunctions. Under full-light irradiation, the optimized C 60 OH@pCOF achieves a CO production rate of 40.47 μmol/(g·h) in pure water, approximately four times higher than that of pristine pCOF, along with a CO selectivity of 99%. This remarkable enhancement is mainly attributable to the introduction of C 60 OH molecules into the pCOF, which facilitates the directional transfer of photogenerated electrons from the porphyrin donor to the DHTA moieties and then to the C 60 OH acceptor. Moreover, the abundant surface hydroxyl groups on C 60 OH serve as metal-free catalytic sites that effectively activate pre-accumulated CO 2 within the nanopore-based reactor and promote the formation and conversion of key intermediates. This study provides new insights into the design and construction of porous crystalline framework-based photocatalytic nanoreactors.
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MOLECULES
·
2026
·Vol. 31
·期 13
·2332
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IF 5.1
Renkun Huang,Haohao Yan,Runling Huang,Chen Zhou,Qiuzhong Li,Lu Chen,Ruowen Liang
A novel composite catalyst for photothermal CO2cycloaddition was developed by integrating the ionic liquid 1-ethylpyridinium bromide (EPB) with a copper-based metal–organic framework (HKUST-1). HKUST-1 was synthesized via a hydrothermal method and functionalized with EPB through a wet impregnation strategy to enhance its catalytic performance. Under xenon lamp irradiation and optimized conditions (80 °C, 1 MPa CO2pressure, 12 h, and 0.07% mol of TBAB bromide as a co-catalyst), the HK@EPB composite exhibited outstanding performance in catalyzing the conversion of CO2and various epoxides into cyclic carbonates. The exceptional catalytic activity arises from a synergistic multicomponent mechanism: the incorporation of EPB not only enhances CO2adsorption capacity but also provides photothermal energy for the reaction; simultaneously, EPB dissociates bromide ions to effectively initiate epoxide ring-opening. In particular, propylene oxide achieved a selectivity of 95% for the desired cyclic carbonate, surpassing most previously reported MOF-based catalysts. This system enables efficient catalysis under mild conditions through the synergistic contributions of the high CO2adsorption capacity and Cu2+/Cu+redox-mediated electron transfer of HKUST-1, the provision of nucleophilic Br-species from EPB to promote epoxide ring-opening, and the cooperative effect of TBAB. This study demonstrates that ionic-liquid-functionalized MOF composites can serve as sustainable and versatile catalytic platforms, offering an environmentally friendly pathway for large-scale CO2utilization.
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·123910
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IF 7.5
Wenhao Hou,Jiaqi Xing,Lina Qiao,Yun Ju,Yaqi Liu,Jing He,Wenwen Wei,Jie Jiang,Hong Zhang
Water microdroplets possess energetic interfaces that can promote the reduction and utilization of carbon dioxide (CO 2 ). However, the mechanism by which acidity modulates CO 2 interfacial reactions in microdroplets remains unclear. Herein, CO 2 fixation in pyruvate-containing microdroplets was investigated over a pH range of 1.5–10.1. Online mass spectrometry showed that acidic conditions significantly enhance the reaction between CO 2 and pyruvate, particularly in smaller droplets and at lower pyruvate concentrations. A similar promotion was observed for another α-keto acid, α-ketoglutaric acid. Mechanistic analysis suggests that electrostatic attraction between interfacial anions (Cl - and OH - ) and protons amplifies the interfacial electric field at the air-water interface, which drives CO 2 fixation rather than conventional proton catalysis. These findings highlight the critical role of acidity in interfacial CO 2 -related chemistry and may help improve the understanding of environmentally relevant microdroplet carbon processes.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Kai Zhu,Zhenmao Zhang,Xinyin Bai,Fangfang Chang,Qing Zhang,Ge Li,Zhengyu Bai
Electrochemical pre-reconstruction creates CuO/Cu 2 O/Cu/CeO 2 @C heterointerfaces. • Carbon confinement stabilizes multivalent Cu interfaces during CO 2 electroreduction. • CeO 2 modulates the electronic structure and interfacial charge distribution of Cu. • Reconstructed interfaces tune the thermodynamics of *CO and *OCCO formation. • Ethanol Faradaic and cathodic energy efficiencies reach 75.6% and 30.9% at −0.9 V vs. RHE. The electrochemical CO 2 reduction reaction (CO 2 RR) to ethanol provides a carbon–neutral route for the sustainable production of value-added chemicals, yet achieving high ethanol selectivity remains challenging. Herein, we report a Ce-containing Cu-based oxide precursor embedded in a carbon framework, which undergoes electrochemical pre-reconstruction to form CuO/Cu 2 O/Cu/CeO 2 @C heterostructure featuring active multi-heterointerfaces. By optimizing the Ce content, the reconstructed catalyst delivers a high ethanol Faradaic efficiency of 75.6% and an energy efficiency of 30.9% at −0.9 V versus the reversible hydrogen electrode in a flow-cell reactor, outperforming most reported Cu-based CO 2 RR electrocatalysts. Comprehensive structural characterizations reveal that the carbon confinement layer mitigates excessive reduction of Cu species and stabilizes the multivalent Cu interfacial environment during CO 2 RR, while CeO 2 modulates the local electronic structure and induces interfacial charge redistribution over Cu sites. In situ characterization combined with theoretical calculations further reveals that interfacial environment modifies the relative thermodynamics of *CO and *OCCO formation. This work provides profound insights into interfacial charge-redistribution-mediated ethanol selectivity and provides a design strategy for high-performance advanced Cu-based CO 2 RR electrocatalysts. Download: Download high-res image (80KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Feiyu Zhu,Yudong Ding,Xinglu Feng,Yujia Gan,Xun Zhu,Min Cheng,Qiang Liao
Hydrophobic DES integrates CO 2 cycloaddition and catalyst recycling. • Polarity evolution drives aqueous extraction of carbonate products. • Water extraction gives 93% recovery and > 97% yield over five cycles. • DFT reveals a water-tolerant decanol-assisted ring-opening pathway. • Catalyst-as-raffinate design enables reaction–separation integration. Homogeneous catalysts offer high activity for CO 2 fixation, yet their separation from polar carbonate products remains a persistent barrier to catalyst recycling. Here, we report an integrated catalysis–separation system based on a catalyst-as-raffinate strategy, exploiting the polarity increase inherent to the CO 2 cycloaddition of epoxides. A hydrophobic deep eutectic solvent composed of trioctylmethylammonium bromide and decanol was constructed as both the catalytic medium and the recyclable low-polarity raffinate phase. During the conversion of glycidol to glycerol carbonate, the reaction-induced polarity shift promotes product partitioning into water during extraction, while retaining the catalyst in the hydrophobic phase. Product extraction reached 93%, and the recovered catalyst maintained glycerol carbonate yields above 97% over five consecutive catalytic–extraction cycles. DFT and energy-decomposition analyses show that residual water is thermodynamically accommodated within the hydrogen-bonding catalytic network, whereas the decanol-assisted ring-opening pathway remains kinetically favored by avoiding excessive exchange repulsion in the rate-determining transition state. These features enable stable catalytic performance during aqueous recycling. Across different epoxides, extraction efficiency correlates with the product–DES polarity difference. This work establishes reaction-induced polarity evolution as a design principle for coupling homogeneous catalysis with product separation and catalyst recycling. Download: Download high-res image (101KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Jing Fan,Pengfei Jin,Guohua Wu,Fenhong Song,Long Ma
Twelve ternary DESs were prepared for efficient and regenerable CO 2 capture. • AA-PZ-EG (1:1:8) reached 0.18876 mol mol −1 at 303.15 K and 810 kPa. • CO 2 solubility was accurately correlated with a maximum AAD of 0.299%. • FTIR verified physical dissolution coupled with amine-assisted chemical capture. • DES2 retained >80% regeneration efficiency after three capture-release cycles. To address the greenhouse effect and climate change caused by excessive CO 2 emissions, the development of efficient, green, and regenerable CO 2 absorbents has become a major research focus in the fields of energy and environmental science. In this study, twelve ternary deep eutectic solvents (DESs) were synthesized from acetamide, piperazine, 1,4-diazabicyclo[2.2.2]octane (DABCO), ethylene glycol, and diethylene glycol via a one-step heating and stirring method. The density, viscosity, potential ecotoxicity of the constituent components, CO 2 absorption performance, and short-term cyclic performance were systematically investigated. With increasing temperature, the prepared DESs exhibited an approximately linear decrease in density, while their viscosity displayed a temperature-dependent reduction consistent with Arrhenius behavior. Ecological Structure-Activity Relationships (ECOSAR) screening suggested relatively low predicted aquatic toxicity for most of the individual components, whereas the ecotoxicity of the complete DES mixtures remains to be assessed experimentally. Among the twelve ternary DESs, DES2, which exhibits combined physical dissolution and reversible chemical interactions at the PZ sites, showed the best CO 2 absorption performances, with a CO 2 uptake of 0.1294 g CO 2 /g DES at 303.15 K and 810 kPa. The CO 2 solubility data were correlated using the Jou and Mather equation within the investigated temperature and pressure ranges, and the model showed good agreement with the experimental data. Moreover, DES2 (AA:PZ:EG = 1:1:8) retained over 80% of its initial CO 2 absorption capacity after three consecutive absorption–desorption cycles, indicating favorable short-term cyclic performance. Download: Download high-res image (162KB) Download: Download full-size image
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Jincheng Peng,Lu Tang,Yihao Xiao,Xinxi Huang,Wanbin Li
MOFs are nested into intrinsic micropores of membranes by in situ confined growth. • Rigid MOF units interact with polymer chains and suppress polymer relaxation. • MOFs can reconstruct pore architectures and environments for improving selectivity. • Membranes exhibit enhanced aging resistance and separation performance. • After 180-d aging, CO 2 permeability and CO 2 /N 2 selectivity are 3240 Barrer and 47.3. Polymers of intrinsic microporosity (PIMs) with abundant interconnected pathways are promising for fabricating CO 2 capture membranes with exceptional permeability, but their applications are hindered by the issues of physical aging and insufficient selectivity. In this study, we report in situ confined growth of pore-nested metal-organic frameworks (MOFs) within the intrinsic micropores of PIM membranes as scaffolds to reconstruct their pore architectures for addressing the issues of aging and selectivity. Through a simple two-step immersion process for precursor immobilization followed by coordination, the pore-nested MOFs are constructed within the cavities and homogeneously distributed throughout the membranes. As rigid MOF units interact with polymer chains, suppress polymer segmental relaxation, reinforce polymer matrices, and regulate transport pathways, the rigidified membranes exhibit simultaneously enhanced aging resistance and separation performance, with selectivity markedly increasing from 14.6 to 40.3. After natural aging for 180 days, the membranes still retain a CO 2 permeability of 3240 Barrer, 92.3% of the initial value, alongside a CO 2 /N 2 selectivity of 47.3. This study offers a viable route to reshape transport channels via confined synthesis within micropores for designing high-performance and anti-aging separation membranes. Download: Download high-res image (387KB) Download: Download full-size image
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