CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Shaoxuan Huang,Xin Xu,Wenlu Huang,Zihao Wu,Maogang He,Xiangyang Liu
In order to enhance the CO 2 capture performance of ionic liquids, this work synthesized porous ionic liquids (pILs) utilizing UiO-66 as the porous material and [DMIM][NTf 2 ] as a sterically hindered solvent. By controlling the MOF proportion within a low range (<2.0%), the pILs achieved a dual enhancement in both CO 2 solubility and diffusion coefficient. Comprehensive characterization confirmed the structural integrity, well-defined morphology, and correct chemical composition of the synthesized materials. The CO 2 solubility in the low-pressure region was measured by the isochoric saturation method, and the corresponding diffusion coefficients were calculated based on the semi-infinite volume model. The results demonstrated that the pILs achieved dual enhancement in both CO 2 solubility and diffusion coefficient exhibiting an increase of approximately 20% for both parameters. And the absorption-desorption experiment further showed an enhancement in CO 2 solubility, with over 94% cyclic efficiency after five cycles for the three representative absorption pressure. These results indicate the significant enhancement and exceptional absorption stability of pILs across a wide pressure range. The dual enhancement effect demonstrates the exceptional CO 2 capture performance offering important insights for the practical industrial application.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
·
IF 6.2
Chohee Yang,Taewoo Lee,Young-Min Kim,Doyeon Lee,Eilhann E. Kwon
Given the non-biodegradable nature of synthetic textiles, their thermal treatment (incineration) presents a promising route to mitigate environmental issues associated with microfiber generation. However, this approach is hindered by the formation of toxic aromatic compounds, especially characterized when heteroatoms are present in the polymer backbones. To address this challenge, this study proposes a pyrolytic valorization of acrylic fabric waste (AFW) while using carbon dioxide (CO 2 ) as a detoxifying agent to suppress the toxic aromatic byproducts. Compositional analysis of AFW revealed the presence of 85 wt% polyacrylonitrile (PAN) and 15 wt% polyvinyl acetate (PVA). Pyrolysis of AFW yielded a complex mixture of volatile products, predominantly AN-derived oligomers and their aromatic derivatives; however, direct interactions between these intermediates and CO 2 were limited. To activate the reactivity of CO 2 , an ex-situ catalytic system using a nickel (Ni)-based catalyst was integrated to the conventional pyrolysis. The Ni catalyst facilitated the cyclization and aromatization of AN-derived oligomers, while the formed aromatics were partially oxidized by CO 2 into carbon monoxide (CO), suppressing the aromatic analogues. Increasing the catalyst-bed temperature from 500 to 700 ˚C enhanced CO 2 activation and promoted the conversion of aromatics to CO. At catalyst-bed temperature of 700 ˚C, catalytic pyrolysis under CO 2 exhibited a 35.9 % reduction in toxic aromatic formation compared to pyrolysis under nitrogen environment. Overall, this work demonstrates a sustainable strategy for AFW disposal with elucidating the mechanistic role of CO 2 in transforming toxic aromatic species into detoxified gaseous products, primarily CO.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yi-Ming Gu,Hai-Feng Qi,Salman Qadir,Tian-Jun Sun,Ruicong Wei,Sheng-Sheng Zhao,Xiao-Wei Liu,Zhiping Lai,Shu-Dong Wang
Carbon capture from flue gas and natural gas benefits to make the most of resource gases and alleviate global warming, though achieving ultra-high selectivities to sieve CO 2 from CH 4 and N 2 remains a challenge. To this end, MOFs with delicate size-exclusive pores and inherent functional groups may give birth to efficient CO 2 sieving sorbents, with intriguing CO 2 selectivities and capacities. Herein, we report a two-dimensional stacked indium-based MOF, i.e., In(aip) 2 , with functional –NH 2 groups and channels around 3.57 Å to specifically trap CO 2 , with a uptake over 1.27 mmol/g at 298 K and 101 kPa. Indeed, In(aip) 2 possesses amazingly-high IAST selectivities for CO 2 /CH 4 (≈1808), and CO 2 /N 2 (≈2635) at 298 K and 101 kPa, at least a magnitude superior to most of other MOF materials reported to date. The following static/dynamic sorption measurements corroborated the separation properties of this material, with purity gas (ca. 99 %) of CO 2 once released. In-depth theoretical calculations further demonstrated the host–guest interactions, as facilitated by hydrogen bonding, for CO 2 sieving. Our principle to design and identify MOF materials in this study proved an inspiring route to prepare highly-efficient CO 2 sieving sorbents.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 11
·45974
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IF 1.86
Wenqi Xian,Lina Song,Baohua Liu,Hulan Ding,Zhao Li,Mengping Cheng,Le Ma
CO 2 copolymer diol-based thermal polyurethane elastomers (PPC-TPU) were prepared by the reaction of CO 2 copolymer diol and methylene diphenyl diisocyanate and chain extender (ethylene glycol/1,4-butanediol/1,6-hexanediol) (EG/BDO/HG). The rheological and mechanical properties of PPC-TPU were analyzed. The effects of shear rate, shear temperature, hard segment content, and variety of chain extender on the properties of PPC-TPU were studied. The results showed that the apparent viscosity (η) of PPC-TPU decreased with the increasing shear rate ( τ ), and the non-Newtonian index ( n ) was less than 1. PPC-TPU exhibited a typical character of pseudoplastic non-Newtonian rheological behavior. The degradation during the processing was obviously inhibited by adding plasticizer and antioxidant. It was also discovered that the apparent viscosity varied with the content of hard segment and chain extender. Under the same temperature (185 °C) and shear rate (50 s −1 ), the apparent viscosity increased considerably with the raise of hard segment content, and the apparent viscosity and tensile strength of PPC-TPU with EG as chain extender was the maximum. It can be seen that with the apparent shear rate increasing, the variation tendency of apparent shear stress levels off, and the nonlinear relationship of τ – γ curve tended to be obvious. PPC-TPU exhibited a typical character of pseudoplastic non-Newtonian rheological behavior. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45974.
研究领域:
高分子材料科学
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流变学
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功能高分子
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生物基聚合物
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材料力学
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高影响因子
FUEL
·
2018
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IF 4.908
Yu-hong Qin,Min-min Feng,Zi-bing Zhao,Stanislav V. Vassilev,Jie Feng,Christina G. Vassileva,Wen-ying Li
The ash fusion process of Jincheng anthracite ash, rice straw ash and coal-biomass ashes with different rice straw ash addition ratios during co-gasification under CO 2 atmosphere was elucidated by the ash fusion test, chemical analyses, optical heating stage microscopy (OHSM), X-ray diffraction and scanning electron microscopy equipped with energy-dispersive X-ray analyzer. Results showed that the initial sintering and initial melting temperatures of coal-biomass ashes observed by OHSM decreased with the addition of rice straw ash. The deformation temperatures determined by the ash fusion test were close to the initial melting temperatures. The biomass ash addition to coal ash introduced excessive amounts of alkaline compounds in the ash mixtures that led to lower initial temperatures of liquid phase formation. The ash fusion behavior of coal-biomass ashes with a rice straw ash addition ≤3 wt% was similar to that of coal ash and fits to the “softening-melting” ash fusion mechanism. In contrast, the ash fusion behavior of coal-biomass ashes with a greater addition of rice straw ash (>3 wt%) experienced dramatic changes at lower temperature and fits to the ‘‘melting-dissolution’’ ash fusion mechanism.
研究领域:
燃料化学
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能源工程
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热化学转化
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燃烧学
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灰化学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Shuo Li,Shu-Mei Chang,Ming-Jie Yin,Wen-Hai Zhang,Wei-Shi Sun,Angus Shiue,Quan-Fu An
Poly (ethylene oxide) (PEO) membranes are attractive for CO 2 capture due to the particular dipolar–quadrupolar interaction between EO units and CO 2 molecules, which offer high CO 2 /N 2 selectivity. However, the low CO 2 permeability of PEO membranes hampers their practical applications. Herein, a simple solvothermal annealing approach was proposed to enhance the flexibility of PEO chains via ‘activating’ the disengagement and rearrangement of side chains, which is essential for boosting the gas permeability . The effects of solvothermal annealing temperature, time, and solvent on the CO 2 /N 2 separation performance were comprehensively investigated. The mechanism for the performance enhancement was proposed: a “highway” for gas transportation was built up by the released flexible side chains, which were confirmed by the mechanical and Li ion conductivity characterizations. The optimized PEO membrane offers a superior CO 2 permeability of 1294 Barrer, a high CO 2 /N 2 selectivity of 50, and 110-h long-term running stability, being beyond the 2008 Robeson’s upper bound line and promoting the practical application of PEO membranes in CO 2 capture by reducing the cost.
研究领域:
高分子科学
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膜分离技术
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气体分离
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环境工程
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材料化学
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高影响因子
ACS Catalysis
·
2019
·
IF 12.221
Tian-yuan Chen,Chenxi Cao,Tian-bao Chen,Xiaoxu Ding,Hai Huang,Liang Shen,Xinyu Cao,Minghui Zhu,Jing Xu,Jian Gao,Yi-Fan Han
We present a comprehensive mechanistic study on the highly tunable selectivity over Inx/ZrO2 catalysts in CO2 hydrogenation. By variation of the indium loading between 0.1 and 5 wt %, either an admirable selectivity to methanol of 70–80% or up to 80% selectivity to CO could be obtained in the temperature range of 250–280 °C. It is shown that the shift in the product spectrum is related to the synergy between indium species and the zirconia substrate through variable interfacial structures. Zirconia-modulated crystalline In2O3, which prevails for indium loadings between 2.5 and 5 wt %, could enhance stepwise hydrogenation of *HCOO, leading to *H3CO and finally methanol due to the suitable bonding strengths of *HCOO and *H3CO. Regarding CO, evidence has been provided that the synergistic effect between adjacent indium and zirconia sites is indispensable for the entire catalytic cycle. *HCOO is formed at the indium–zirconia interfaces and decomposes to CO subsequently. Highly dispersed InOx dominating for loadings below 0.5 wt % features an enormous indium–zirconia interface and suppresses hydrogenation ability for *HCOO, thus favoring the generation of CO. The study provides fundamental insights into the mechanism of CO2 conversion and reaction pathway tuning over oxide catalytic systems.
研究领域:
催化化学
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材料化学
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可持续能源
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化学反应工程
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表面科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Jiafa Chen,Zifan Niu,Xuehua Zhang,Penghui Yao,Yicheng Zhao,Yongdan Li
Photocatalytic CO 2 N -formylation of amines promises a clean and sustainable approach for CO 2 conversion. Conventional ZnO photocatalyst with high redox capability and good stability suffers from low absorption efficiency of visible light and severe recombination of photogenerated charge carriers. In this work, we present the decoration of ZnO nanosheets with bimetallic PtNi nanoparticles, demonstrating a high photocatalytic activity towards CO 2 N -formylation of benzylamine. The CO 2 adsorption capacity of ZnO is significantly improved with the modification of Pt and Ni. Meanwhile, the localized surface plasmon resonance effect of Ni enhances the absorption ability of visible light remarkably. Furthermore, the electron transfer paths from ZnO to the metals and from Ni to Pt within the bimetallic nanoparticles are proved by experimental and theoretical calculation results, which improve the separation efficiency of photoinduced electron-hole pairs. After 24 h reaction under visible light at room temperature, a benzylamine conversion of 85.0% is achieved with a high selectivity of 99.4% towards N -benzylformamide. The PtNi/ZnO photocatalyst also shows good cycling stability.
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高影响因子
Chemosensors
·
2026
·Vol. 14
·期 7
·168
·
IF 4.4
Jingjing He,Min Ye,Huiting Lian,Xuexia Lin
As a core component of vitamin B12, Co2+is closely associated with the health, life performance, and productivity of ruminants. Therefore, the selective and sensitive detection of Co2+is of great significance. In this work, using the Au–S bond as an “anchor”, a ternary nanocomposite (CDs-AuNPs-GSH) with synergistic functions was constructed by combining gold nanoparticles (AuNPs) with glutathione (GSH) through hydrogen bonding and electrostatic interactions with functional groups on the surface of carbon dots (CDs). The resulting nanocomposite was employed as a fluorescence sensor for Co2+detection. Under optimal conditions at pH 6.0, the sensor exhibited a good linear relationship over the Co2+concentration range of 0.5–125.0 mM, with a limit of detection (LOD) of 0.38 mM. The interaction mechanism between Co2+and the composite was systematically investigated using various characterization methods. The results indicated that Co2+, owing to its strong coordination ability, enriches on the surface of the composite, subsequently triggering dynamic fluorescence quenching via an electron transfer pathway. The sensor was successfully applied to determine Co2+in mixed livestock and poultry feed samples, with recovery rates ranging from 89.4% to 103.9%, demonstrating its potential for on-site detection in feed analysis.
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高影响因子
Chemistry-An Asian Journal
·
2026
·Vol. 21
·期 16
·e70944
·
IF 3.2
Mengsen Xian,Ruoyu Zhang,Guangzhen Shao,Chunwei Zhuo,Shunjie Liu,Xianhong Wang
CO 2 ‐based polycarbonates show great potential for application as biodegradable pressure‐sensitive adhesives (PSAs). However, it remains challenging for polycarbonate‐based PSAs to achieve rapid surface wetting while simultaneously maintaining sufficient cohesive strength. To address this issue and improve adhesive performance, we propose a strategy for preparing crosslinked polycarbonate PSAs. As a proof of concept, bio‐derived epoxides, including furfuryl glycidyl ether and n ‐butyl glycidyl ether, were introduced as key monomers to synthesize functionalized CO 2 ‐based polycarbonates (PBFCs). The crosslinked PSAs were subsequently constructed through a Diels–Alder reaction, while the flexible side chains enabled rapid wetting of the adhesive on the substrate surface. As a result, the static shear adhesion was significantly improved from approximately 0.1 h to over 24 h, accompanied by a tack grade of #2. Notably, the prepared PSAs could be reused for three cycles while maintaining a peel strength of approximately 2 N cm −1 , and no visible residue was observed on the substrate after peeling. This study develops a series of crosslinked CO 2 ‐based PSAs from bio‐based epoxides, providing a promising platform for the design of high‐performance biodegradable PSAs. CO 2 ‐based polycarbonates demonstrate significant potential in the application of biodegradable pressure‐sensitive adhesives (PSAs). However, achieving rapid surface wetting while maintaining sufficient cohesive strength remains a challenge for linear polycarbonates. To address these issues and enhance PSA performance, this study proposes a strategy for preparing crosslinked CO 2 ‐based polycarbonate PSAs. Polycarbonates (PBFC) were synthesized via the copolymerization of bio‐based glycidyl ethers (furfuryl glycidyl ether and n ‐butyl glycidyl ether) with carbon dioxide. Subsequently, the furan rings on the side chains of PBFCs reacted with bismaleimide hexane via Diels–Alder chemistry to form crosslinked PSAs, whereas the flexible side chains of PBFC facilitated rapid wetting of the substrate surface. Results demonstrated that the introduction of the crosslinked structure significantly enhanced the static shear adhesion force (increasing from approximately 0.1 h to over 24 h). Notably, the prepared PSAs could be reused three times while maintaining a peel strength of approximately 2 N/cm, with no residues observed on the substrate during peel tests. In this study, a series of crosslinked CO 2 ‐based PSAs were developed using bio‐based epoxides, providing a novel platform for the production of high‐performance biodegradable PSAs.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Meichao Gao,Yuting Ma,Yingfei Sun,Juntao Hao,Xiquan Zhang,Qiuju Zheng,Changlong Sun,Yunyun Gong
Heterojunction construction offers an effective means to modulate band structures and enhance charge separation in photocatalysis. The aim of this work is to develop a high-performance photocatalyst for CO2 reduction by combining the advantages of 1D and 2D materials. To achieve this, a hierarchical S-scheme heterojunction comprising 1D SiC nanowires and 2D BiOBr nanosheets is designed and fabricated via a facile hydrothermal route as the key method. The formation of the S-scheme heterojunction facilitates efficient spatial charge separation while preserving the strong reduction and oxidation potentials of the respective components. As a result, the SiC/BiOBr composite exhibits significantly enhanced visible-light absorption and markedly suppressed photogenerated carrier recombination compared to pristine BiOBr. Under simulated solar irradiation, the optimal catalyst achieves a CO evolution rate of 715.98 μL·g–1·h–1, approximately six times and five times higher than those of pure SiC and BiOBr, respectively. Furthermore, the heterojunction demonstrates excellent stability over extended photocatalytic CO2 reduction cycles. In conclusion, this work provides a promising strategy for constructing S-scheme binary heterostructures toward cooperative applications in environmental remediation and solar fuel conversion.
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高影响因子
Chemical Science
·
2026
·
IF 8.1
Lingyi Kong,Zhe Chen,Yuheng Chen,Lingxiao Wang,Yu Wang,Yafei Li
Electrolyte cations are widely recognized as critical promoters in electrochemical CO2 reduction reaction (CO2RR), yet the field has largely focused on cation identity while overlooking a more fundamental and practical parameter, namely cation concentration. Whether increasing cation concentration continuously enhances catalytic activity remains an open and consequential question, and the lack of mechanistic understanding has limited the rational design of electrolyte environments. Here, we demonstrate that cation concentration is not merely a secondary parameter, but a decisive kinetic regulator that fundamentally governs CO2RR performance. By integrating constant-potential ab initio molecular dynamics simulations with experiments, we reveal a previously unrecognized nonmonotonic (“volcano-type”) dependence of catalytic activity on K+ concentration over Ni-N-C single-atom catalysts. At moderate concentrations, K+ promotes CO₂ activation by restructuring the interfacial hydrogen-bond network and stabilizing key intermediates. Strikingly, further increasing K+ concentration leads to over-stabilization of *CO, impeding its desorption and suppressing overall reaction rates. This “double-edged” effect establishes an intrinsic trade-off between intermediate activation and product release. Experimental measurements directly validate this prediction, exhibiting a pronounced rise-and-fall trend in CO partial current density.
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PubMed
高影响因子
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