Sustainable Chemistry and Pharmacy
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2026
·
IF 5.8
Gao Rui,Xu Bingqi,Gao Weichen,Jiang Ping,Zhang Shiyu,Cui Kai,Zhao Yingliang
Alkali-activated slag (AAS) binders activated solely by sodium hydroxide often exhibit poor performance, requiring additional sodium silicate, which increases both cost and environmental impact. To overcome these limitations, in this study, a novel CO 2 -assisted activation (CAA) strategy, integrating CO 2 mineralization with mechanical activation, is proposed to enhance the performance of AAS binders. Reaction kinetic modeling revealed that the slightly lower reaction order observed in the CAA-treated AAS system, reflects a suppression of diffusion-controlled hydration, which in turn prolonged the nucleation-growth stage and enabled a uniform hydration pathway. Structural analysis suggests enhanced silicate polymerization in CAA-treated AAS samples, as evidenced by increased Q 2 (1Al) content, mean chain length, and polymerization degree from 29 Si NMR. These gel-level refinements resulted in a denser and more cohesive matrix, contributing to improved mechanical performance. Specifically, the optimized system exhibited a 68.0 % increase in 1-day compressive strength and a 45.6 % enhancement at 28 days, along with reduced porosity and higher micromechanical stiffness. The synergy between CO 2 and the mechanical activation in CAA process suggests that CO 2 acts as a field-enhancing agent, modifying the physicochemical environment and promoting nucleation processes. Overall, this work demonstrates that CAA offers a dual-function strategy—both chemical and environmental—for designing high-performance, low-carbon AAS systems.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2013
·Vol. 51
·期 13
·2834-2840
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IF 3.543
Lin Gu,Yusheng Qin,Yonggang Gao,Xianhong Wang,Fosong Wang
Common CO 2 -based biodegradable polycarbonates like poly(propylene carbonate) or poly(cyclohexene carbonate) are generally hydrophobic, leading to slow biodegradation rate and poor cell adhesion, which limit their applications in the biomedical field. Here hydrophilic polycarbonates were prepared by one-pot terpolymerization of CO 2 , propylene oxide (PO), and 2-((2-(2-(2-methoxyethoxy)ethoxy)ethoxy)methyl)oxirane (ME 3 MO) using binary Salen Co(III)-Cl/PPNCl catalyst system. The resultant terpolymers showed one glass transition temperature ( T g ), which decreased with the increase of ME 3 MO units in the terpolymers ( F ME3MO ). Water contact angles of the resultant terpolymers with F ME3MO of 4.2−23.6% were 68−25°, while that of poly(propylene carbonate) was 90°, indicating that the terpolymers became hydrophlilic. Furthermore, the terpolymers with F ME3MO more than 25.8% exhibited reversible and rapid thermo-responsive property in water, and the lower critical solution temperature (LCST) was highly sensitive to F ME3MO . In particular, aqueous solution of the terpolymer with F ME3MO of 72.6% showed a LCST around 35.2 °C, close to body temperature, which was promising for biomedical applications, especially for in vivo applications. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2834–2840.
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Carbon Energy
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2026
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IF 24.2
Fengyu Tian,Yaohao Li,Xuemin Yan,Huiwen Zhu,Jiayu Liang,Honglei Zhang,Ning Han
Photocatalytic CO 2 reduction involves multiple proton-coupled and multi-electron transfers, leading to a plethora of reaction pathways and consequently unpredictable products. The unique electronic structure and unsaturated coordination environment of single-atom photocatalysts can influence the reaction pathways of CO 2 photoreduction, enhancing the yield of a target product. Herein, we rationally design the In single-atom photocatalyst (In-NTO) containing isolated In δ+ –N 3 O 2 atomic interface sites for highly efficient and selective CO 2 -to-CO photoreduction. This distinctive atomic configuration not only reduces the overall activation energy barrier but also transforms the key *CO desorption step from an endoergic to an exoergic one, thereby altering the reaction pathway to selectively produce CO rather than CH 4 . Consequently, the 0.25 wt% In-NTO exhibits high selectivity (95.9%) for photocatalytic CO 2 -to-CO conversion, with a rate of 6.34 µmol g −1 h −1 . This work offers a novel strategy for modulating the reactivity and product selectivity of photocatalytic CO 2 reduction toward desired products by constructing single-atom sites with heteroatomic coordination.
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CATALYSIS LETTERS
·
2026
·Vol. 156
·期 2
·50
·
IF 2.4
Cheng Hongna,Wang Chaoyong,Wang Zihan,Peng Weikang,Hou Jiayi,Tian Shiting,Shi Zixuan,Liu Ying,Li Fengfeng,Zhang Mingxi
The climate crisis caused by excessive carbon dioxide (CO 2 ) emissions urgently call for efficient electrocatalytic reduction technology to convert CO 2 into high value-added products. In this study, nickel polyphthalocyanine (NiPPc) electrocatalysts with different copper (Cu) doping amounts (10–90 wt%) were prepared by solvothermal method, Combining X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other characterization and electrochemical testing, it is found that: Doping with 10 wt% Cu significantly enhanced catalytic activity, achieving a current density of 325 mA cm −2 at − 0.6 V (vs. RHE)—2.8 times that of the sample; 50 wt% Cu doping optimized the Cu–N 4 active sites, yielding a carbon monoxide (CO) Faraday efficiency of up to 95% at − 1.0 V; 30 wt% Cu-doped catalyst can generate CO: H 2 = 1:1 syngas, A controllable catalyst design strategy is provided for CO 2 electrocatalytic reduction. Graphical Influence of Cu Loading (10–90 wt%) on Electrocatalytic CO 2 Reduction Activity and CO Selectivity of NiPPc Catalysts.
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Gas Science and Engineering
·
2026
·
IF 6.8
Zhihao Zhang,Mingwei Zhao,Zhongzheng Xu,Zhixue Sun,Yingnan Wang,Yizheng Zhang,Huan Zhang
CO 2 dry fracturing technology offers advantages such as environmental friendliness, mitigation of water-sensitive damage, and improved flowback efficiency, making it an ideal choice for the development of low-permeability and tight unconventional reservoirs. However, the inherently low viscosity of liquid CO 2 limits its proppant-carrying and fracture-propagating capacity. The introduction of efficient thickeners is currently the most effective method. In this work, an ester-modified polysiloxane polymer (PDH) was successfully synthesized via the copolymerization and hydrosilylation, its dissolution and thickening mechanisms in liquid CO 2 were systematically investigated using high-pressure phase equilibrium experiments combined with molecular dynamics simulations. Experimental results showed that both the cloud pressure and thickening performance of PDH in liquid CO 2 improved significantly with increasing thickener and co-solvent concentrations. At a thickener dosage of 5 wt% and co-solvent (ethanol) dosage of 5 wt%, PDH exhibited a cloud pressure of only 10.91 MPa and increased the viscosity of liquid CO 2 by 59.02 times. Simulation results indicate that strong dipole–quadrupole interactions between the polar ester groups and CO 2 enhance compatibility can reduce intermolecular distances and increase interaction energies. Furthermore, the higher rigidity of PDH chains and the formation of a stable solvation layer effectively restrict CO 2 mobility, leading to significantly lower mean square displacement and diffusion coefficients compared to PDMS. These features enable PDH to achieve high solubility and pronounced thickening effects at relatively low pressures. It can provide theoretical support for the synthesis and screening of CO 2 thickeners in the future.
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Particuology
·
2026
·
IF 4.7
Yi Zhang,Liangwei Hu,Yuan Lu
The escalating atmospheric CO 2 concentration calls for advanced carbon capture solutions. However, developing a stable and efficient adsorbent with high selectivity for CO 2 capture remains a significant challenge. Microporous materials capture CO 2 primarily through physisorption based on pore structure and van der Waals forces. In this study, three silicon-aluminum zeolite molecular sieve materials were synthesized and hydrophilic modification of ZIF-8 was achieved through post-synthetic coordination with polyethylene glycol. A systematic comparison of the CO 2 adsorption performance of these materials under different conditions was then conducted. Zeolites exhibited exceptional thermal stability (< 5% mass loss from 25-800 °C under an air atmosphere) and cyclability (retaining > 95% of initial adsorption capacity throughout cycling), outperforming ZIF-8 analogues. 85-nm zeolite achieved the optimal CO 2 uptake (1.8 mmol g -1 ) at 25 °C and ZIF-8 showed the best humidity resistance (40% decrease at 80% RH). Additionally, ZSM-5 exhibited enhanced gas retention of 1498 s, indicating superior CO 2 adsorption affinity. These results demonstrate the excellent thermal stability and cycling stability of the zeolite materials. This study provides actionable insights for future material design: 1) prioritizing zeolite-based frameworks for scenarios requiring long-term cyclic stability and thermal robustness; 2) optimizing pore size and surface properties to balance adsorption capacity and selectivity; 3) developing anti-poisoning modifications targeting SO 2 competitive adsorption in flue gas.
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Carbon and Hydrogen
·
2026
·
IF 0
Tongyu Wu,Xiaoxiao Yu,Fuhai Zhang,Lei Wang,Minmeng Tang,Yanhong Chao,Haiyan Liu,Wenshuai Zhu
Substantial research has been dedicated to advancing visible-light photocatalysts for the conversion of CO 2 into sustainable fuels. The overall efficiency of this process is critically dependent on both the effective generation/separation of photogenerated charge carriers and the adsorption/activation of CO 2 reactants. Bismuth oxyhalides (BiOX) are promising due to their layered structure and built-in electric field, which facilitate charge separation. However, their practical application is often limited by insufficient CO 2 adsorption capacity and restricted visible-light harvesting. Herein, we report a series of composite photocatalysts constructed via the in situ growth of BiOX on needle coke–derived graphene (NCG). This integrated structure leverages the high specific surface area and inherent heteroatom doping of NCG to enhance CO 2 adsorption, while the resulting intimate heterojunction significantly promotes visible-light absorption (especially within 500–800 nm) and accelerates interfacial charge transfer. The optimized BiOBr-25%NCG composite achieves a remarkable CO production rate of 46.32 μmol·g −1 ·h −1 from photocatalytic CO 2 reduction without any sacrificial agents, representing a 13-fold enhancement over pristine NCG and a ∼4000-fold increase compared to bare BiOBr. The superior performance is attributed to the synergistic enhancement of light absorption, charge separation kinetics, and CO 2 adsorption activation. This work presents a viable strategy for developing efficient, low-cost photocatalytic systems by integrating functional carbon matrices derived from industrial byproducts with semiconductor catalysts.
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Nature Communications
·
2026
·
IF 18.1
Lu Ruihu,Zhu Jiexin,Xia Chenfeng,Li Mengjiao,Yu Ruohan,Chen Xingbao,Dai Yuhang,Zong Wei,Long Yu,Xia Bao Yu,Mai Liqiang,Wang Ziyun
Renewably powered electrochemical CO 2 reduction (CO 2 R) to alcohols presents a promising route to liquid fuels and chemicals. However, protonation of different intermediates often leads to mixed liquid and gas products, complicating separation and reducing economic feasibility. Here, we present a hydroxyl-affinity-tuning strategy that stabilizes hydroxyl-containing CO 2 R intermediates away from interfacial water through constructing nano-metal interfaces, thereby favoring ethanol production. Theory-guided catalyst design directs nano-cobalt/Cu surfaces, delivering CO 2 -to-ethanol Faradaic efficiencies (FE) of 62.17% and 45.32% under alkaline and acidic conditions, respectively, with ethanol partial current densities over ~300 mA cm −2 . In acidic media, the catalyst maintains ethanol production for 235 hours with an average FE of 44.74%. In situ spectroscopy and theoretical calculations reveal that nano-Co/Cu interfaces favor binding hydroxyl groups and thereby enriches C-OH species on the copper surface, redirects CO 2 R pathways toward ethanol. This work provides a catalyst-centered strategy for designing interfacial architectures for selective alcohol synthesis. Future efforts should focus on translating this design principle into scalable systems for practical electrochemical CO 2 utilization.
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PubMed
高影响因子
Catalysts
·
2026
·Vol. 16
·期 8
·714
·
IF 4.5
Yuanheng Chen,Weiming Hua,Yinghong Yue,Zi Gao
CO2-assisted ethane dehydrogenation (CO2-EDH) provides an attractive route to ethylene, yet its practical efficiency is limited by nonselective cracking, coke formation, and irreversible reduction of active Cr species. Here, a series of highly dispersed chromium catalysts (Cr@S-1) was prepared by a cetyltrimethylammonium bromide (CTAB)-assisted one-pot strategy. Their catalytic performance for CO2-EDH to ethylene was evaluated. XRD, XPS, UV-vis, Raman, and H2-TPR analyses indicate that the CTAB-mediated synthesis environment regulates MFI crystallization and chromium precursor distribution, leading to improved Cr dispersion and an enhanced population of Cr6+species. The optimized catalyst delivered 69.8% initial ethane conversion and 54.7% ethylene yield at 650 °C without any observable deactivation over 70 h after the induction period, exhibiting better catalytic performance than the conventional impregnated counterpart (Cr/S-1). These results identify surfactant-regulated zeolite encapsulation as an effective route to prepare stable and selective Cr-based catalysts for CO2-assisted ethane dehydrogenation.
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ChemCatChem
·
2025
·
IF 3.9
Wenhao Zhang,Liang Shen,Fayang Zhou,Xinyu Cao,Jiacheng Chen,Sheng Dai,Jing Xu,Minghui Zhu
Understanding the role of support is of guiding significance for studying the structure–activity relationship of supported Ni-based catalysts. In this work, catalysts with 0.1, 1, and 10 wt.% of NiO supported on CeO 2 , ZrO 2 , TiO 2 , and Al 2 O 3 were prepared by the impregnation method. The catalytic performance of CO 2 methanation was correlated with Ni particle size, reducibility, and basicity. The activity of the catalyst was found to be positively correlated with both the Ni particle size and reducibility, which promote the hydrogen dissociation and CO 2 activation processes, respectively. However, the basicity of the catalyst does not seem to be related to the reaction activity. Moreover, the coexistence of formate and the associative mechanism over the catalysts was evidenced. Graphical This work reveals that in CO 2 methanation over supported Ni catalysts, catalytic activity correlates positively with Ni particle size and reducibility, enhancing H 2 dissociation and CO 2 activation, respectively, but not with basicity. The coexistence of formate and associative mechanisms is confirmed over nickel-based catalysts in this work.
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Journal of CO2 Utilization
·
2025
·
IF 8.4
Kihyuk Sung,Hye Jeong Joe,Changsu Ha,Hee-Seong Yang,In-Hwan Lee,Seok Ki Kim,Hye-Young Jang
We investigated the polymerization mechanism of a highly active heterogeneous Zn-gallate catalyst used for propylene oxide (PO) homopolymerization and PO/CO 2 copolymerization. The molecular weights of poly(propylene oxide) (PPO) and poly(propylene carbonate) (PPC) can be controlled by varying the ratio of chain transfer agents (CTAs) to PO. CTAs of varying acidity and structure provided insight into their interaction with catalytic sites. Theoretical calculations on a heterogeneous zinc hydroxide slab model for Zn-gallate revealed that polymerization is initiated by the reaction of PO with a hydroxyl group located within the zinc hydroxide lattice. Further energy barrier calculations and polymerizations at varying CO 2 pressures explained the kinetic preference for PPC formation over PPO at high CO 2 pressure.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianyi Wang,Longqi Wu,Chao Zhang,Guozhu Zhang,Yang Chen,Chengze Gao,Zeyu Wang,Yiming Wang,Yang Gao,Fuzhen Xuan
Real-time monitoring of exhaled carbon dioxide (CO 2 ) is essential for assessing metabolic status and tracking disease progression. However, the high moisture content of exhaled breath poses a significant challenge to the accuracy and stability of CO 2 detection. Here, we present a flexible chemiresistive CO 2 sensor based on a dimethylamine-functionalized hydrogel, in which water molecules critically facilitate the CO 2 -induced reversible protonation of tertiary amine groups, thereby modulating the hydrogel's ionic conductivity for real-time breath analysis. As a result, the hydrogel synthesized from N -[3-(dimethylamino) propyl] methacrylamide (DMAPMA) exhibits a high CO 2 response of 37.3 % at 10,000 ppm and a low detection limit of 100 ppm. To further enhance mechanical durability under respiratory-induced stress, N , N -Dimethylacrylamide (DMAA) was incorporated into the hydrogel, increasing the tensile strain limit from 34.2 % to 51.0 % without compromising CO 2 sensing performance. In addition, we demonstrate the integration of the hydrogel sensor into a wireless smart mask system, enabling multimodal monitoring of respiratory CO 2 patterns, physical activity, and postprandial metabolic changes. This platform offers a scalable, low-power solution for wearable CO 2 sensing in personalized health monitoring.
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