SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Shuo Gao,Wanru Feng,Junsu Jin,Jianguo Mi,Hong Meng
Structured adsorbents capable of combining strong low-pressure CO 2 affinity, high selectivity, and humidity tolerance are highly desired for low-concentration CO 2 capture, yet remain difficult to realize because shaping often compromises porosity and mass transport. Here, we report a solvent-directed and nanoconfined crystallization strategy to construct millimeter-sized polyacrylate (PA)-supported Zn 2 (Mtz) 2 Ox-EG sphere (Zn 2 (Mtz) 2 Ox-EG@PA). Ethylene glycol modulates the ultramicroporous environment of Zn 2 (Mtz) 2 Ox, enhancing its low-pressure CO 2 affinity, while the confined macroporous network of the PA matrix promotes heterogeneous nucleation and suppresses free crystal growth, sharply reducing the size of the micrometer-scale MOF bulk crystals by nearly 100-fold. The resulting Zn 2 (Mtz) 2 Ox-EG@PA composite exhibits a high CO 2 uptake for 1.68 mmol g −1 at 0.05 bar and 313 K, while N 2 and CH 4 adsorption are strongly suppressed. Consequently, high IAST selectivities of 3447 for CO 2 /N 2 and 1275 for CO 2 /CH 4 are achieved at a 5/95 gas ratio. The hydrophobic MOF framework and PA matrix endow the composite with excellent hydrothermal durability, retaining framework integrity after hot-water treatment at 403 K for 7 days. Dynamic breakthrough experiments further demonstrate efficient CO 2 /N 2 separation from a 5 vol% CO 2 stream at 90% RH, highlighting the potential of nanoconfined MOF crystallization for robust structured adsorbents under humid dilute-CO 2 conditions.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Qianwen Wang,Mengjie Li,Dandan Zhang,Mingmin Jia,Xiong-Fei Zhang,Jianfeng Yao
A mixed-matrix membrane was developed by combining defect-engineered UiO-66-NH 2 metal-organic framework (MOF) and nanocellulose. A formic acid-modulated solvothermal method creates linker-missing defects in UiO-66-NH 2 , increasing its specific surface area from 540 to 775 m 2 g −1 . The hydroxyl/carboxyl-rich cellulose forms a robust hydrogen-bonding network with amino groups and defect sites on the MOF, suppressing interfacial defects. The optimized membrane achieves a CO 2 permeability of 303.7 Barrer with CO 2 /N 2 and CO 2 /CH 4 selectivities of 92.3 and 124.0, respectively. This enhancement arises from optimized adsorption sites in the defective MOF and superb MOF-cellulose interface capability coupled with efficient CO 2 transfer through the cellulose network. Moreover, the membrane exhibits good stability over 500 h tests, offering a promising approach to high-performance gas separation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Baojie Dou,Xiangyu Mei,Weijia Xue,Jiaojiao Shang,Jianwu Lan,Lihong Lao,Patrick Theato,Shaojian Lin
CO 2 -responsive materials that use CO 2 as a benign external trigger to regulate surface wettability have emerged as promising candidates for oily wastewater treatment. However, the efficient treatment of high-viscosity oils and bidirectional stable oil-in-water emulsions using CO 2 -responsive oil/water separation materials remains a significant challenge. Herein, a multifunctional CO 2 -responsive photothermal sponge (CCF@PDA-PMS) by integrating a CO 2 -switchable polymer and low-cost biomass-derived carbonized cotton fibers (CCF) into a polydopamine (PDA) modified melamine sponge (MS) was successfully fabricated. This rational design combined reversible wettability switching with efficient solar-driven self-heating in a single three-dimensional porous framework, enabling adaptive treatment of complex oily wastewater. As expected, the resulting sponge exhibited rapid CO 2 -triggered wettability switching from superhydrophobic (water contact angle of 151.7°) to superhydrophilic (0°). Meanwhile, the sponge demonstrated high adsorption capacities toward a wide range of oils, absorbing 20 to 45 times its own weight. Furthermore, under 1.0 sun irradiation, the CCF@PDA-PMS surface reached a temperature of 98.0 °C within 25 s owing to efficient photothermal conversion, which effectively reduced the viscosity of crude oil, enabling the CCF@PDA-PMS to rapidly absorb crude oil with a capacity of up to approximately 30 g g −1 . More importantly, the integrated CO 2 -responsive wettability allowed gravity-driven bidirectional separation of both water-in-oil (W/O) and oil-in-water (O/W) emulsions with separation efficiencies exceeding 98.2% while maintaining stable permeation fluxes. Additionally, the prepared sponge exhibited outstanding stability and recyclability. Overall, these multifunctional characteristics highlight the potential application prospects of the CO 2 -responsive sponge in controllable oil-water separation and the remediation of viscous oil spills.
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高影响因子
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Xiaohan Li,Yi Wen,Chenguang Qian,Bowen Cui,Fang Yuan,Chunquan Li,Zhiming Sun
Diatomite-induced amino coordination transformation Bi-MOF composite was prepared. • Surface silanol groups modulate Bi 3+ coordination, inducing amino ligand transformation. • The coordination transformation forms highly dispersed NH 2 -Bi-MOF nanowhiskers. • The composite shows enhanced photocatalysis, cycling stability and lower costs. Developing photocatalysts featuring outstanding catalytic activity and economic viability contributes greatly to artificial carbon cycling and addressing energy and environmental challenges. In this study, we adopted a strategy combining amino ligand modification with diatomite support to successfully synthesize amino-modified NH 2 -Bi-MOF/diatomite composites. These materials utilize the silanol groups on the diatomite surface to modulate the coordination environment of the Bi 3+ metal centers, inducing the conversion of amino ligands and promoting the formation of Bi-N bonds, thereby transforming the morphology of the NH 2 -Bi-MOF from an agglomerated state to highly dispersed nanowhiskers. The characterization results indicate that the highly dispersed structure endows the material with outstanding chemical stability, light-harvesting capability, CO 2 adsorption capacity, and carrier separation efficiency. Meanwhile, the optimal sample, NH 2 -Bi-MOF/diatomite-0.2, achieves a CO production rate of 10.440 μmol·g −1 ·h −1 , representing increases of 78% and 45% compared to Bi-MOF and NH 2 -Bi-MOF, respectively. Notably, no apparent decline in catalytic performance was observed after four cycles. Furthermore, the introduction of diatomite substantially reduces catalyst preparation costs. This study also systematically elucidates the conversion mechanism of amino ligands and the interfacial synergy between diatomite and NH 2 -Bi-MOF, clarifying the photocatalytic CO 2 reduction pathways and core mechanisms of the composite material. The findings provide new insights for the development and industrial application of highly efficient and economical photocatalysts. Download: Download high-res image (191KB) Download: Download full-size image
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高影响因子
Journal of CO2 Utilization
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2026
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IF 8.6
Debiao Pan,Caijin Zhou,Xiaoda Wang,Xuehui Ge
Achieved efficient CO 2 absorption in curved TiTR under counter-current flow. • Overall volumetric mass transfer coefficient up to 0.97 s −1 . • Enhancement factor of gas-liquid mass transfer reached 1.35. • Trade-off between mass transfer enhancement and energy consumption evaluated. • Empirical correlation for mass transfer coefficient with 15% error. In recent years, the substantial emission of carbon dioxide (CO 2 ) has caused increasingly severe environmental issues. In response, policies related to carbon neutrality and carbon emission reduction have been rolled out. To achieve these goals, the efficient capture of CO 2 is essential. This work systematically elucidated the gas-liquid two-phase counter-current mass transfer mechanism for an efficient CO 2 absorption process using a curved tube-in-tube reactor (TiTR), which has a wide gas-liquid contact area and a new reactor structure. The variation of CO 2 absorption efficiency and the overall gas-liquid volumetric mass transfer coefficient ( k L a ) under different experimental conditions, including curvature diameter, pitch, and liquid flow rate, was systematically examined. Through the optimization of experimental conditions, the enhancement factor of k L a , which was defined as the ratio of k L a of the curved TiTR to that of the straight TiTR, reached 1.35, and k L a was up to 0.97 s −1 . In addition, the trade-off between mass transfer enhancement and energy consumption in the CO 2 absorption enhancement process within TiTRs with different geometries was evaluated. Finally, on the basis of the experimental data, an empirical equation correlating k L a with experimental parameters was further proposed. This equation can be used to predict the gas-liquid mass transfer in TiTRs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Chao Tang,Bing Wu,Guowei Yang,Guangjian Chai,Dian Qu,Chun Chen,Zhihong Yang,Jian Sun,Jianmei Xu,Zhiquan Chen,Qihang Wang,Wei Zhou
Metal organic frameworks (MOF) are widely incorporated into mixed matrix membranes (MMMs) for CO 2 separation. However, the relationship between MOF-induced free volume characteristics and transport behavior remains insufficiently understood. In this work, Pebax MH 1657-based MMMs were prepared using a dual ligand aluminum-based MOF (CAU-PBH), derived from CAU-10-H through partial substitution of isophthalic acid by pyridine-3,5-dicarboxylic acid, as a filler to investigate its effect on the free volume and CO 2 transport properties of the Pebax membranes. It exhibits a microporous structure and a polar chemical environment containing carboxylate and N-heterocyclic groups, which are favorable for CO 2 adsorption and polymer-filler compatibility. The optimized MMM containing 5 wt% CAU-PBH showed a CO 2 permeability of 95.10 Barrer and a CO 2 /N 2 selectivity of 66.64 at 0.2 MPa and 35 °C, approaching the 2008 Robeson upper bound. Quantitative positron annihilation lifetime spectroscopy (PALS) analysis revealed that CAU-PBH incorporation modified the free volume characteristics of Pebax through changes in polymer chain packing and crystallization behavior. The MOF-induced changes in free volume characteristics were closely associated with changes in gas diffusivity, while CO 2 solubility increased markedly. The regulated free volume characteristics, together with the intrinsic micropores and CO 2 affinity sites of CAU-PBH, enhanced CO 2 sorption and contributed to selective transport pathways, thereby improving CO 2 separation performance. These results indicate that the separation enhancement cannot be attributed to a simple change in free volume alone, establishing a PALS-based structure-transport correlation between MOF-induced free volume characteristics and CO 2 transport behavior in Pebax MMMs.
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高影响因子
Journal of Energy Storage
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2026
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IF 10.7
Qi Cheng,Tenghui Qiu,Jiashun Liu,Zixuan He,Hua Tian,Lingfeng Shi,Gequn Shu
Photo-assisted lithium‑carbon dioxide battery (Li-CO 2 ) can utilize the charge carriers generated at the cathode by light to reduce the kinetic barriers of carbon dioxide reduction and lithium carbonate decomposition reactions. However, rapid recombination of photogenerated carriers and sluggish interfacial charge transfer still lead to high overpotentials and limited cycle life in photo-assisted Li-CO 2 batteries. Therefore, it is crucial to design highly efficient photocatalysts that can suppress carrier recombination and accelerate interfacial charge transfer for rational optimization. Herein, we adopted the design strategy of metal ion doping and synthesized a Fe-doped ZnS (Zn 1-x Fe x S, denoted as ZFS-x) photocathode by the hydrothermal synthesis method. The doping of iron ions effectively regulates the electronic structure of ZnS, inhibits the recombination of photogenerated carriers, and accelerates the interfacial charge transfer kinetics. The photo-assisted ZFS-x cathode delivers a markedly prolonged cycling lifetime of up to 300 cycles (600 h) at a current density of 0.01 mA cm −2 , substantially exceeding that achieved under dark conditions (144 h). Furthermore, the single-cycle overpotential is significantly reduced from 2.27 V in the dark to 0.49 V under illumination. Morphology studies confirm that appropriate Fe-ion doping significantly enhances the uniformity of the discharge products, which are present as uniformly dispersed nanoscale particles rather than densely packed plate-like or aggregated structures. Moreover, their highly reversible decomposition during charging effectively mitigates pore blockage and interfacial passivation. These results indicate that the incorporation of iron can improve charge separation and regulate the formation and decomposition of Li 2 CO 3 , thereby effectively modulating the ZnS photocathode and ultimately enabling the development of photo-assisted Li-CO 2 batteries with low overpotential and long cycle life.
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2026
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IF 4.8
Huimin Luo,Jinming Yan,Deyun Xu,Jia Guo,Mengjie Fan,Longtian Kang,Qingfu Sun
P/N-type Z-scheme heterojunction of Co-PDI/Cu-CuTCPP is prepared by a simple way. • Multifunctional photocatalytic activity of is achieved for POE, PHE and CO 2 RR. • Catalytic activities for POE and CO 2 RR increase by ~3 and ~12 times, respectively. • The overall CO 2 RR in the aqueous phase can be achieved to yield O 2 , CO and CH 4 . • It is found that Co-O-Cu linkage exists and has important role in photocatalysis. Developing a multifunctional system for photocatalytic water splitting (PWS) and carbon dioxide reduction reaction (CO 2 RR) is a promising approach to achieve the green carbon cycling. Here, the p/n-type Z-scheme heterojunction (Co-PDI/Cu-CuTCPP) between cobalt perylene diimide nanorods (Co-PDI) and copper porphyrin metal-organic framework nanosheets (Cu-CuTCPP NSs) is constructed via a cetyltrimethylammonium bromide (CTAB)-assisted physical method. Systematical characterizations prove the existence of Co–O–Cu linkage, π-π interaction, and electrostatic forces between Co-PDI and Cu-CuTCPP. The effect of Co-PDI/Cu-CuTCPP ratio on the optical, photoelectric and electrical properties, as well as multifunctional photocatalytic activity is investigated and analyzed. Under visible light irradiation (λ > 420 nm), the Co-PDI/Cu-CuTCPP composites exhibit the photocatalytic activities of water splitting to H 2 and O 2 , as well as CO 2 RR to CO and CH 4 , respectively. After optimizing photocatalytic system, the oxygen evolution rate of 18.7 mmol·g −1 ·h −1 is reached, which is a 4.4-fold compared that of pure Co-PDI. The photogenerated electron conversion efficiency during CO 2 RR is 12.9-fold higher in Co-PDI/Cu-CuTCPP than in Cu-CuTCPP. Meanwhile, the overall CO 2 RR in the aqueous phase can be achieved without H 2 production. Mechanism studies reveal the photoelectrical conversion process, and confirm the synergistic role between Co-PDI and Cu-CuTCPP. Download: Download high-res image (310KB) Download: Download full-size image
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Yuwen Wang,Hao Li,Xuan Zhang,Yajuan Wei,Jiajun Wang,Jingbo Zhang
Modification of copper-based catalysts by heteroatom doping is an effective method to improve the electrocatalytic reduction of carbon dioxide to C 2+ . However, electrocatalytic reduction of carbon dioxide to ethanol has the problem of low selectivity and low Faradaic efficiency. Herein, bimetallic catalyst CuPd x was prepared by a simple one-pot method. The CuPd 0.1 achieves a high C 2+ Faradaic efficiency of 72.5%, in particular its electrocatalytic reduction of carbon dioxide to ethanol with a Faradaic efficiency of up to 63.0% in flow-cell. Besides, the partial current density of ethanol of CuPd 0.1 can reach up to 335 mA·cm −2 at 1.16 V (vs. RHE). Experiments and theories calculation revealed that the incorporation of Pd into Cu nanoparticles (NPs) triggers structural reconstruction, optimizing the distribution and exposure of active sites while introducing additional oxygen vacancies, which significantly enhances CO 2 adsorption. Furthermore, Pd doping regulates the adsorption energy barrier of H* and significantly reduces the energy barrier for C C coupling, steering the reaction pathway toward ethanol production. This synergistic effect substantially improves the selectivity for ethanol formation. Therefore, appropriate amount of Pd doping can improve the selectivity and catalytic activity of Cu NPs in electrocatalytic reduction of carbon dioxide to produce ethanol.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Weiming Li,Can Jin,Huida Duan,Fangcao Li,Zhangxun Huang,Haodong Zhao,Xiaoman Yu,Yimei Xi,Xiangfeng Zeng,Yongfeng Jia,Chi Cheng
Dark fermentation for biohydrogen requires continuous alkaline dosing to control process acidification and expensive separation units to remove co-produced CO 2 , resulting in high operational costs and energy consumption. Here, we introduce wollastonite as a dual-function agent to simultaneously enhance H 2 yield and capture CO 2 . An optimal dosage of 10 g/L was identified, which shortened the lag phase from 23.13 to 12.38 h and increased the hydrogen yield from 158.11 ± 3.44 mL/g glucose-consumed to 210.75 ± 15.87 mL/g glucose-consumed. Mechanistically, wollastonite buffered the system pH, steering metabolic flux away from lactate towards acetate synthesis by enriching Clostridium and suppressing Lactobacillus . Wollastonite also enabled in-situ CO 2 sequestration by precipitating it as CaCO 3 . However, maximal CO 2 capture was achieved at a higher dosage (≥15 g/L), which passively reached the required neutral pH but compromised the hydrogen yield. This created a conflict with the optimal 10 g/L dosage for hydrogenesis. To prioritize the primary goal of green hydrogen production, a two-stage strategy was developed. This approach first uses the optimal 10 g/L dosage for maximal fermentation, followed by a post-fermentation pH adjustment from 6.54 ± 0.18 to 7.0 to induce carbonation. The optimized process successfully sequestered 0.49 ± 0.05 of CO 2 per liter of medium, thereby increasing the H 2 content in the final biogas to a high of 58.2 ± 1.1%. Finally, a life cycle assessment (LCA) validated the environmental superiority of this strategy, confirming a significantly lower Global Warming Potential (GWP) for the entire process. This work thus provides a proof-of-concept for a pragmatic strategy that co-optimizes hydrogen production and carbon capture in a single, sustainable biorefinery process.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Haoyi Guo,Pan Cao,Muxian Liu,Guohui Dai,Bei Liu,Changyu Sun,Chun Deng,Guangjin Chen
Hydrogen is regarded as a promising alternative to fossil fuels; however, approximately 95% of the global hydrogen supply still comes from “gray hydrogen”, with high carbon emissions. Efficient separation of CO2 and H2 is a key challenge in gray hydrogen production. This study proposes a novel H2 recovery process based on an aqueous solution of 2-methylimidazole (2-MeIm). The 2-MeIm aqueous solution possesses both strong CO2 absorption capacity and easy desorption performance, which can reduce energy consumption. Pure component solubility experiments were carried out at temperatures ranging from 283.15 to 353.15 K and pressures ranging from 0 to 2.0 MPa, yielding 66 sets of pure CO2 solubility data and 15 sets of pure H2 solubility data, which were used to regress the binary interaction parameters of the NRTL model. Comparison between the fitted NRTL model parameters and the experimental data indicates that the mean relative error of CO2 is 5.19%, whereas that of H2 is only 0.18%. Further, single-equilibrium-stage phase equilibrium experiments were conducted using a mixed gas stream with a CO2/H2 molar ratio of 40:60 to further validate the accuracy of the fitted NRTL parameters. The results demonstrate that the solubility-based fitted model achieves a mean absolute error (MAE) of 0.03 for gaseous CO2 and a mean relative error (MRE) of 0.93% for liquid-phase CO2, indicating high predictive accuracy. Based on Aspen Plus, this study has developed a rigorous process simulation model with a processing capacity of 100,000 N m3/h. The operating conditions were defined through sensitivity analysis, resulting in the following optimized parameters: 7 theoretical stages for the absorber, an operating pressure of 3.8 MPa, a volumetric gas-to-liquid ratio of 200, and a desorption temperature of 373.15 K. Under these conditions, H2 purity and recovery reached 99.99% and 99.13%, with specific energy consumption of only 260.27 kgoe/t H2 (10.88GJ/t H2). Compared with the conventional Rectisol process, the 2-MeIm-based process not only achieves higher H2 purity and recovery rate, but also significantly reduces total energy consumption by 32.07%. This marked performance enhancement underscores the outstanding energy-saving potential of the 2-MeIm system in the field of H2/CO2 separation.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
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IF 3.5
Jiahao Wu,Mengxuan Wei,Yikun Zhou,Jiawei Lin,Jing Zhang,Shiyue Kang,Zining Zhou,Jian Tian,Guowu Zhan
This study presents a systematic approach for synthesizing hierarchical bio-NaY zeolite using rice husk-derived silica (bio-SiO 2 ) as structural and compositional templates. The incorporation of bio-SiO 2 significantly increases mesoporous volume and optimizes the distribution of Lewis acid-base pairs within the zeolite framework. Comparative analysis demonstrates a marked improvement in CO 2 adsorption capacity for the bio-NaY zeolite (147.3 mg·g –1 ) over conventional NaY (138.3 mg·g –1 ). ZLC experimental results reveal that this enhancement is attributed to a dual mechanism: (i) the bio-SiO 2 template promotes the formation of a hierarchical pore system, improving mass transport; and (ii) it enhances the accessibility and exposure of active sites, facilitating CO 2 capture and intraparticle diffusion. Molecular dynamics simulations further reveal that the (100) crystallographic plane exhibits superior CO 2 adsorption affinity, kinetics, and selectivity compared to the (001) plane. Additionally, the integration of 3D printing technology enables the fabrication of mechanically robust monoliths (3D-bio-NaY), simplifying adsorbent handling and regeneration. These 3D-printed structures exhibit exceptional cyclic stability, retaining nearly 100% of their initial CO 2 capture capacity over eight consecutive cycles. The findings provide deep insights into the structure-property relationships of hierarchical zeolite and advance the design of efficient adsorbents for industrial CO 2 capture applications.
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高影响因子
危险品化学品经营许可证（带存储）