JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2024
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IF 1.5
Bao Ping,Wang Xiaowei,Men Jinfeng,Hu Zhilin
In order to effectively remove Co 2+ from radioactive wastewater, β-cyclodextrin/graphene oxide (β-CD/GO) was synthesized. The factors affecting the adsorption of Co 2+ in water were determined by static adsorption experiments, and the synthesis and adsorption mechanism of the materials were discussed by using Density Functional Theory (DFT). The results show that β-CD and GO are mainly bonded by ester group and hydrogen bond, the adsorption of Co 2+ by β-CD/GO belongs to single molecular layer chemisorption, and the intramolecular diffusion is the main factor of affecting the adsorption rate. The adsorption capacity of Co 2+ can reach 95.83 mg/g under appropriate conditions, but it will be affected by interference ions.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xinghui Liu,Saraschandra Naraginti,Fuchun Zhang,Kuppusamy Sathishkumar,Vadivel Subramaniam,Krishnamoorthy Ramachandran,Ashish Kumar,Xiang Guo
The presence of Co 2+ ions in water streams can pose severe health risks to humans due to their health impacts at high concentrations. As a result of its weak interaction with existing adsorbents, selective detection and removal of Co 2+ are challenging. To meet the global challenge, we engineered a mesoscopic silica monolithic architecture of hexagonal mesopores that can detect and remove Co 2+ ions from a wide range of water resources. The direct impregnation of the PDBDP azo-Schiff probe on MSM's surface resulted in strong selectivity for Co 2+ ions. Based on various characterization techniques, it was validated that the developed sensor material exhibits a high surface area and uniform pore structure, which can provide a high adsorption capacity and ultrafast sensing kinetics. A clear sensing mechanism was demonstrated using Job's plot, B-H method, and DFT calculation, showing strong interactions between Co 2+ ions and PDBDP imprinted MSM sensor. As a result of optimizing several physicochemical parameters, the naked-eye colorimetric sensing is accompanied by a desirable colour transition from pale yellow to dark red, with LOD and LOQ values of 0.09 & 0.31 ppb, and a linear concentration range of 5.0–150.0 ppb, respectively. Overall, this study provides comprehensive insights into mesoporous materials that remove Co 2+ pollutants from water bodies efficiently.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Weiting Yu,Zhe Yang,Rendan Zhu,Mengzhi Lu,Tingjiang Lu,Yan Yu,Shuang Song
The photo-assisted electrochemical CO 2 reduction reaction (CO 2 RR) toward CO stands as a highly promising pathway for addressing environmental challenges and produces valuable chemicals. In this study, a novel pl-Si/Ag/Pc electrode was developed with the surface enveloped by an amorphous phthalocyanine overlayer. The pl-Si/Ag/Pc electrode has gained recognition as a catalyst of exceptional quality, displaying superior activity, selectivity toward CO, and stability. A synergistic mechanism has been revealed from experimental results that Ag served as active centers for CO 2 RR, Pc facilitated CO 2 adsorption and suppressed the competing HER reaction. Functionalizing the surface of electrode with Pc enhanced the CO selectivity (FE CO at 90.8 % under −1.5 V vs RHE) during the CO 2 RR process and reduced the cost in following product separation procedures. This study presents an uncomplicated yet effective approach for formulating durable and discerning electrocatalysts dedicated to the utilization of CO 2 .
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Shaojun Jia,Jin Huang,Yuqing Wang,Wu Chen,Yao Jiang,Peng Cui
Nonaqueous liquid–liquid CO2 phase change absorbents (CPCAs) have garnered significant attention due to their potential for efficient and energy-saving CO2 capture in the amine-scrubbing process. This study introduces a novel nonaqueous CPCA that utilizes aminoethylethanolamine (AEEA) as the main amine absorbent, dimethyl sulfoxide (DMSO) as the organic solvent, and N-ethylmorpholine (NEM) as the phase separator. To mitigate the high viscosity of the rich phase in CPCA, diethanolamine (DEA) is introduced as a viscosity regulator, which reduces the viscosity by 79.3% by weakening the intermolecular hydrogen bonding in the CO2 products. Notably, the optimized CPCA of A20E10D40N30 demonstrates a high cyclic capacity of 2.94 mol·kg–1 and a low regeneration energy consumption of 1.79 GJ·t–1 of CO2. Overall, the efficient CO2 capture performance, low regeneration energy consumption, and minimal corrosivity make this CPCA a promising candidate for industrial CO2 capture applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Xin-Ran Shi,Sai-Nan Guo,Ruoxi Zhang,Biao Yang,Hua Zou,Jie-Xin Wang
Metal–organic frameworks (MOFs) have emerged as pivotal materials for the photocatalytic reduction of CO2 to CO due to their exceptionally high surface areas and abundant active sites. However, most of the currently reported MOFs are confined to micropores (<2 nm), which limits adsorption/desorption and substance transport during photocatalytic CO2 reduction reactions. Herein, hierarchically porous MOFs (HP-MOF-74) were synthesized based on the assembly of MOF-74-Ni nanoparticles with different particle sizes (21, 42, and 85 nm) using spray-drying technology. The simultaneous enhancement of CO2 adsorption performance and photoelectroactivity was achieved in HP-MOF-74 due to the additional mesoporous structure formed by the nanoparticle stacking. The HP-MOF-74 exhibits 1.14–1.38 times improvement in the CO2 adsorption capacity compared to the corresponding initial MOF-74 nanoparticles (N-MOF-74). Meanwhile, the hierarchical architecture enhances photon utilization through improved light reflections and accelerates electronic transmission via additional mesopore pathways. These synergistic advantages collectively contribute to a 1.2–2.1 times enhancement in the CO generation rates of HP-MOF-74 compared with N-MOF-74 counterparts. Particularly, HP-MOF-74–42 nm demonstrated the highest CO production rate of 6.65 μmol h–1, outperforming most reported MOF-based photocatalysts. The construction of hierarchically porous MOFs provides a new idea for the design of highly efficient CO2 reduction photocatalysts.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 3.7
Wei Liu,Xiaoshen Li,Shaohui Xiong,Xueyang Jiang,Jiayan Yan,Xiang Duan,Yingtian Zhang,Qingpeng Cheng,Ye Tian,Xingang Li
CO 2 hydrogenation to methanol is a critical technology for hydrogen energy conversion and a promising approach to mitigate the energy crisis and greenhouse effect. However, developing highly selective catalysts remains a major challenge for its practical application. Herein, we synthesize an efficient CoCuInO-r catalyst with Cu 11 In 9 and Co 0 dual sites on In 2 O 3 via a sol-gel method. The Cu 11 In 9 intermetallic compound enhances H 2 adsorption capacity and strength, and increases oxygen vacancy concentration on the catalyst surface, thereby improving CO 2 activation and hydrogenation efficiency. Meanwhile, Co 0 suppresses the desorption of the *CO species, facilitating its further hydrogenation to methanol. In-situ DRIFTS experiments indicate that the CO 2 hydrogenation to methanol over CoCuInO-r follows the formate pathway. Compared with CuInO-r (containing Cu 11 In 9 on In 2 O 3 ), CoCuInO-r exhibits a ∼20% increase in methanol selectivity and a 2-fold higher methanol space-time yield, reaching 7.68 mmol·g cat -1 ·h -1 at 300 °C and 4 MPa.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2025
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IF 3.4
Wei Shen,Zilong Yang,Xiaolin Guo,Hongxiao Jin,Wenxiang Chai,Hongliang Ge,Dingfeng Jin
Amino acid ionic liquids (AAILs) are potential green substitutes of aqueous amine solutions for carbon dioxide (CO 2 ) capture. In this study, we prepared three amino acid ionic liquids, constructed from tetrabutylphosphine hydroxide in combination with glycine, histidine, and arginine. We have conducted a comprehensive study on the CO 2 absorption capacity of structures containing single, double, and triple N–H groups. The solubility of CO 2 in [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were measured experimentally over a temperature range of 30–110 °C and up to a pressure of 0.75 MPa. The results indicate that the solubility of carbon dioxide in amino acid ionic liquids decreases with increasing temperature, while it increases with increasing pressure. The optimal CO 2 absorption conditions of three amino acid ionic liquids were determined to be 50 °C, 0.75 MPa. Moreover, CO 2 absorption capacity of three amino acid ionic liquids followed the order: [P 4444 ][Arg] > [P 4444 ][His] > [P 4444 ][Gly]. Studies on the recycling and regeneration of amino acid ionic liquids verified their reusability in the process and confirmed that the reaction between AAILs and CO 2 could be reversed at 140 °C. Finally, the recycle capacity and CO 2 removal efficiency of [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were evaluated.
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Journal of the American Chemical Society
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2025
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IF 15.6
Deyun Sun,Shangqing Chen,Miao He,Hongxue Xu,Yongxiang Sun,Lijuan Shi,Hongbo Zeng,Qun Yi
Efficient extraction of high-purity CO2 from humid flue gas via adsorptive separation offers a promising and sustainable solution for carbon reduction and downstream applications. However, the coadsorption of H2O vapor and N2 from humid flue gas remains a persistent challenge that limits separation efficiency. To overcome this issue, this work introduces a novel concept of ionic hydrophobic gates on porous adsorbents, which enables one-step separation of high-purity CO2 directly from humid flue gas. By assembling hydrophobic ionic liquids and fluorine-rich terephthalaldehyde onto the surface of a metal–organic framework (MOF), this design establishes H2O barriers and CO2 channels on the outer shell while maintaining pore integrity in the core. The resulting core–shell material demonstrates exceptional CO2 adsorption capacity and an extraordinary CO2/N2 selectivity of 1780 (15/85, v/v), surpassing conventional adsorbents. Notably, dry CO2 with 99.999% purity is successfully extracted from humid flue gas (relative humidity, RH = 100%) in a single breakthrough experiment. In situ diffuse reflectance Fourier transform infrared spectroscopy (in situ DRIFTS) and density functional theory calculations reveal that fluorine-rich hydrophobic sites act as effective H2O barriers, while ionic liquid segments facilitate the transport of CO2 through hydrogen bonding and electrostatic interactions. Owing to its excellent scalability and broad compatibility with diverse MOF platforms, this ionic hydrophobic gating strategy offers a robust and versatile approach for constructing advanced gas separation materials, holding great promise for industrial applications in carbon capture, clean energy, and sustainable chemical processes.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yueyue Gao,Yiqian Yao,Chuanwen Zhao,Pu Huang,Yafei Guo,Jian Sun
The capture of CO 2 from flue gas after combustion using solid sorbents is one of the efficient options for reducing CO 2 emissions from fossil fuel-fired power plants. To satisfy the requirement of large quantities flue gas treatment, the CO 2 capture capacities of the solid sorbents must be focused on. In this study, K 2 CO 3 /Al 2 O 3 adsorbents were prepared via spray granulation, achieving an optimal CO 2 adsorption capacity of 1.89 mmol/g at a potassium carbonate loading of 30 wt%. To address the limitations of potassium-based adsorbents, we further enhanced the performance by incorporating polyethyleneimine (PEI), an amine-functionalized material known for its high CO 2 affinity, in the K30Al adsorbent. A series of potassium-amine composite adsorbents were synthesized with varying PEI loadings (1 wt%, 3 wt%, 5 wt%, and 7 wt%). Remarkably, a synergistic effect between K 2 CO 3 and PEI was observed, with the 5 wt% PEI loading yielding the highest CO 2 adsorption capacity of 2.19 mmol/g, representing a 16 % improvement over the unmodified adsorbent. This represents a novel K30Al-P5 composite adsorbent successfully fabricated through deposition of a small amount of PEI onto pre-synthesized K30Al substrate via the spray granulation method. Comprehensive characterization, including adsorption capacity, cyclic stability, and structural properties, revealed that the enhanced performance is attributed to the optimized interaction between K 2 CO 3 and PEI, which facilitates CO 2 chemisorption and diffusion. This study not only demonstrates a significant improvement in CO 2 capture efficiency but also provides a scalable and cost-effective strategy for designing high-performance adsorbents.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Bilian Jiang,Shanshan Dai,Wei Fan,Jialong Yang,Ruiyao Wang,Yuanqiang Zhu
Aiming at the issues of high corrosion and high energy consumption in the traditional aqueous absorption system, this study adopts organic alcohols as the absorption medium instead of water. Organic alcohol solvents enhance the absorption efficiency and the corrosion resistance of the system by forming hydrogen-bond networks with ionic liquids. Meanwhile, by introducing of alcohol ether solvents as phase separation promoters has successfully established an efficient, low corrosive, and low energy consuming liquid-liquid phase change absorption system. The system’s CO 2 absorption loading can reach 4.71 mol CO 2 /mol PILs, the absorption loading in simulated flue gas reaches 3.98 mol CO 2 /mol PILs, the volume fraction of the CO 2 -rich phase is 35.0 %, and its corrosivity is only 17.3 % that of MEA solution. The cyclic performance indicates that after five cycles, the CO 2 absorption loading of the system can still reach a good state. Analysis by ¹³C‐NMR spectra reveal that the absorption mechanism adheres to the zwitterionic mechanism. The phase separation phenomenon is closely related to changes in polarity, density, and viscosity. This system opens a new direction for the development of low corrosion and high energy efficiency phase change absorption technologies.
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ENERGY & FUELS
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2025
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IF 5.3
Jingyu Lv,Kang Tan,Fei Wang,Chuanyu Dang,Mengting Sun
Slow CO2 hydrate formation kinetics restricts the development and industrial application of hydrate-based carbon capture and sequestration (CCS) technology. Here, sodium p-styrenesulfonate (SSS) was employed as a novel promoter for CO2 hydrate formation, and its efficiency, promotion mechanism, and recyclability were systematically studied. Results indicated that SSS improved the hydrate formation kinetics remarkably and yielded the highest CO2 uptake of 8.033 ± 0.348 mmol mL–1 as well as the rapidest hydrate growth rate (HGR) of 0.437 ± 0.075 mmol mL–1 min–1 at concentrations of 50 and 100 mmol L–1. SSS under a moderate concentration also presented high efficacy; 6 mmol L–1 SSS led to a short induction time of 36.37 ± 32.14 min, a rapid HGR of 0.307 ± 0.029 mmol mL–1 min–1, and a high CO2 uptake of 7.036 ± 0.472 mmol mL–1. Morphological observation revealed that the promotion effects were mainly attributed to the climbing hydrate growth caused by capillary effect, which was markedly influenced by the sidewall hydrophilicity and the SSS concentration. Stronger hydrophilicity of the sidewall and a higher SSS concentration both favored the liquid movement, boosted the climbing hydrate growth, and improved the formation kinetics. Additionally, SSS did not produce foam when hydrates dissociated and kept admirable promotion performance in at least six repeated cycles, indicating its excellent recyclability.
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International Journal of Greenhouse Gas Control
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2025
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IF 5.2
Guangjie Chen,Guangying Chen,Liuyi Yin,Fei Li,Li Sze Lai,Wee Horng Tay,Swee Pin Yeap,Lin Jin
Chemical-physical biphasic absorbents significantly reduce CO 2 capture energy consumption. In this study, four tertiary amines were combined with monoethanolamine (MEA) and sulfolane to form ternary MEA/co-absorbent/sulfolane biphasic solutions for CO 2 capture. The co-absorbents used were N-methyldiethanolamine (MDEA), 1-Dimethylamino-2-propanol (DMIPA), 3-(Dimethylamino)-1,2-propanediol (DMAP), and 3-Diethylamino-1,2-propanediol (DEAP). The dynamic phase separation behavior and properties were examined, the absorption/desorption characteristics were analyzed, and the phase separation absorption mechanism was explored through 13 C Nuclear Magnetic Resonance (NMR) Spectroscopy. Results showed that all four ternary solvents performed excellently, achieving high CO 2 loadings in the upper phases (3.09–3.41 mol/L), strong absorption and desorption efficiencies (over 92.5 % and 85 %, respectively), large cyclic loadings (above 2.67 mol/L), and reduced energy consumption (>45.81 % lower compared to 5 M MEA solution). The addition of tertiary amines improved the absorption performance of MEA/sulfolane solutions. Phase separation was influenced by amine solvent alkalinity and hydrophilicity, leading to the presence of sulfolane in both liquid phases and the selective distribution of MEA and tertiary amines. This research offers promising alternatives for efficient CO 2 capture and provides theoretical guidance on liquid-liquid phase separation absorption mechanisms.
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