CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 3.7
Xinyi Gao,Qiancheng Zheng,Zhengbao Wang
The preparation of dispersible MFI-type zeolite nanoparticles with open micropores is challenging. Herein, a rapid and effective ultrasound-assisted liquid-phase exfoliation method along with a freeze-drying process for redispersion of calcined Silicalite-1 (S-1) zeolite nanoparticle aggregates using 3-aminopropanol as an exfoliating agent is demonstrated. The exfoliation of S-1 zeolite nanoparticles is characterized by X-ray diffraction, scanning electron microscopy and DLS particle size analysis. The effects of drying methods of as-synthesized zeolite nanoparticle suspension, zeolite contents in frozen nanoparticle suspension, exfoliating agent concentrations, and zeolite doses in ultrasonic suspension on exfoliation efficiency are systematically investigated. It is found that the S-1 zeolite nanoparticle (∼70 nm) achieves a yield up to 95 % through a 30 min ultrasonic exfoliation in a 3-aminopropanol solution along with a freeze-drying process. The proposed exfoliation mechanism involves two primary stages: guest molecule insertion followed by water expansion, both substantially enhanced by tip sonication. This work offers a comprehensive understanding of the exfoliation process, provides valuable insights into the dispersion of sintered zeolite nanoparticles.
研究领域:
材料科学
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化学工程
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 45
·31444-31456
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IF 3.3
Yiwei Zhu,Jian Kang,Die Gao,Bingtong Chen,Yi Nie,Hui Wang,Xiaowen Wu
Ionic liquid based technology is promising in the pretreatment of lignocelluloses. More efforts are still being made to intensify the separation of the main components in this biomass and to inhibit biopolymer degradation, especially in the fabrication of functional materials where excellent mechanical properties are often requisite. In this study, additives with amino and/or hydroxyl groups were proposed to improve the dissolution of lignocellulosic biomass in ionic liquids and to inhibit the degradation of cellulose. Among the tested additives (i.e., urea, L-2-aminobutyric acid, DL-aminopropanol, 3-aminopropanol and ethanolamine), 3-aminopropanol showed the best performance in enhancing wheat straw dissolution and cellulose recovery in 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac). Further study revealed that this additive could also inhibit cellulose degradation in [EMIM]Ac. The interactions between the ionic liquid and additive were revealed by NMR and IR analysis. It was found that the formation of hydrogen bonds between 3-aminopropanol and [EMIM]Ac changed the interactions between ionic liquids and biomass, resulting in improved dissolution efficiency and inhibition of cellulose degradation. Optimization investigation showed that when using the 3-aminopropanol/[EMIM]Ac composite system as the solvent and pine as the raw biomass, the cellulose content in the recovered cellulose-rich material was increased from 33.3% (for the raw pine) to 66.9%. Correspondingly, the regenerated cellulose spinning in the composite system exhibited improved mechanical properties, with the elongation at break reaching 15.6% and the tensile fracture strength of 184.1 N per tex (in comparison with 9.6% for elongation at break and 99.7 N per tex for tensile fracture strength for the sample obtained in neat [EMIM]Ac).
研究领域:
生物化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Run Li,Xiandong Hao,Bo Wang,Ning Zhao,Zhiyong Xu,Wenbo Zhao
In the present work, a novel non-aqueous 3-aminopropanol/polyethylene glycol 200 (3AP/PEG200) absorbent for efficient carbon dioxide (CO 2 ) capture was designed using environment-benign and non-toxic polyethylene glycol 200 (PEG200) as an alternative to water. The mechanism, physical, thermodynamic, and kinetic properties of absorption process was investigated through a combination of experimental and multi-scale computational simulation approaches including molecular dynamics (MD) simulation and quantum chemical (QC) calculations. It was found that the addition of PEG200 not only enhanced the thermal stability of the absorbent, but also did not significantly increase the viscosity. In addition, kinetic studies revealed that the absorption process conforms to a pseudo-first-order equation, with the activation energy ( E a ) value of 20.40 kJ/mol, significantly lower than that of the benchmark 30 % monoethanolamine (MEA) aqueous solution used in industrial CO 2 capture. Furthermore, the enthalpy change ( ΔH ) and entropy change ( ΔS ) values were found to be more negative than those of other liquid absorption systems, indicating that the 3AP/PEG200 absorbent is favorable for CO 2 absorption even at low partial pressures. Most importantly, the absorption system exhibited good regeneration capability, as demonstrated by five absorption–desorption cycle experiments. In conclusion, the non-aqueous 3AP/PEG200 absorbent exhibits low viscosity, high thermal stability, enhanced absorption capacity, and excellent cyclic performance, positioning it as a promising candidate for CO 2 absorption in industrial applications.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Qi Liu,Tong Luo,Yiyan Yin,Yan Ouyang,Min Xiao,Hongxia Gao,Teerawat Sema,Zhiwu Liang
Amine degradation is one of the key issues that hampers the implementation of amine-based post combustion carbon capture technology. In this work, the oxidative degradation of fourteen structurally varied amines were experimentally studied by measuring the amine loss, alkalinity change, ammonia yield, and degradation product. There is a linear relationship between amine loss against alkalinity change and ammonia yield, indicating that the degradation product either loss reactivity for CO 2 absorption or emit out as the small molecule. The results have shown that amine stability generally increased with amine order and stronger steric hindrance effect. Most primary and secondary amines showed more than 40 % amine loss after 336 h degradation experiment, while most of tertiary amines showed less than 10 % amine loss. This may be due to the exposed amine groups of primary and secondary amines. The oxidative degradation mechanism was studied based on density functional theory (DFT) calculations.
研究领域:
化学工程
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环境科学
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材料科学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Si Li,Ruizhe Xu,Luochao Wan,Chaomeng Dai,Jixiang Li,Xueji You,Yanping Duan,Xiaoying Lai,Zhi Li,Jifeng Guo,Yalei Zhang,Jiajun Hu,Lang Zhou,Xiaoyi Huang
This study examines the efficacy and environmental impact of peracetic acid (PAA) activated by thermally modified activated carbon (AC600) for degrading antibiotics in actual groundwater. Laboratory-scale experiments evaluated the system's effects on contaminant degradation, ecological balance, and substance cycling in the hyporheic zone. Our findings demonstrated the effectiveness of the AC600/PAA system in removing sulfamethoxazole (SMX) from groundwater porous media. Additionally, the AC600/PAA system synergistically interacted with the in-situ microbiota of the hyporheic zone, producing more fragmented degradation products without increasing mixed toxicity. Bacterial abundance increased post-reaction, with notable alterations in the bacterial community and enhanced bacterial metabolism. Key genera such as Lysobacter thrived in the treated environment, playing critical roles in microbiota modification and SMX degradation. The pH remained stable before and after the reaction, while dissolved organic carbon content increased. Overall, our results highlight the promising potential of PAA activation by carbonaceous materials as a low-impact, ecologically friendly technology for in-situ remediation of organic pollutants in groundwater, characterized by high compatibility and biosynthesis.
研究领域:
环境科学
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生态学
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生物技术
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DOI
PubMed
高影响因子
Science China-Chemistry
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2025
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IF 9.7
Ding Shurong,Liu Shasha,Yang Yuzhuo,Shi Linlin,Zhang Yongqiang,Yu Jingkun,Song Haoqiang,Shi Yingge,Lu Siyu
In the fields of biomedicine, detection, and anti-counterfeiting, there is a widespread demand for cost-effective, easily synthesized, and environmentally friendly near-infrared (NIR) materials. Carbon dots (CDs), a cheap and non-toxic zero-dimensional carbon nanomaterial exhibiting exceptional photoluminescence (PL) properties and facile structural modification, have emerged as a promising candidate for the development of novel NIR materials. This study presents the synthesis of CDs capable of emitting a wide range of wavelengths from blue to NIR (456–836 nm) as their concentrations increase. The incorporation of oxygen and nitrogen co-doped atoms facilitates the optimization of non-coplanar angles, thereby promoting favorable π-π stacking interactions. This leads to the formation of metal-free rigid clusters through interconnecting adjacent nanoparticles in a gear-like meshing pattern through self-assembly. Consequently, intramolecular motion is constrained, vibration coupling is mitigated, non-radiative transition losses are minimized, and efficient NIR emission from CD clusters in high concentrations is ensured. Furthermore, NIR light-emitting diode (NIR LED) based on the CD clusters was successfully fabricated and employed for various applications including information encryption, anti-counterfeiting, and penetration detection in the field of NIR imaging.
研究领域:
生物医学
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材料科学
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光学检测
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ningbo Yu,Qiang Sun,Minghao Wang,Huiying Liao,Zhiwu Liang,Hongxia Gao
Water-lean absorbents have garnered significant attention for CO 2 capture due to their advantages of low corrosivity and reduced regeneration energy consumption. However, current research indicates that alcohol-based solvents generally exhibit inhibiting effects on CO 2 absorption kinetics, and the underlying suppression mechanisms remain unclear. This study employs molecular dynamics simulations to confirm that the kinetic inhibition mechanism induced by alcohols stems from dual regulatory effects where alcohol molecules form a tighter solvation shell around amines to impede zwitterion formation, while their hydrophobic alkyl groups disrupt hydrogen-bond networks to hinder zwitterion deprotonation. Further research reveals a significant structure-kinetic relationship in 3AP-alcohol solutions, where increased chain length and branching degree of alcohols correlate with slower reaction kinetics. Through integrated analysis of electrostatic potential, non-covalent interactions (NCI), and charge density, we elucidate how solvent effects inhibit the 3AP-CO 2 reaction by three mechanisms: reducing the negative electrostatic potential contribution at the amino nitrogen site, increasing transition-state bonding resistance, and decreasing charge transfer efficiency. The validity of this structure-kinetic mechanism was confirmed by our established kinetic model (AARD <4 %). This study provides a theoretical basis for the solvent screening of CO 2 poor water absorbents, which is helpful for the development process of absorbents.
研究领域:
化学工程
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环境科学
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物理化学
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分离科学
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绿色化工
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DOI
高影响因子
NANO
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2025
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IF 1.1
Miao Wang,Liwang Lan,Chaohong Gao,Wangchuan Xiao
Electrochemically splitting water greatly demands low-cost, high-performance oxygen evolution reaction (OER) catalysts. However, synthesizing size-controllable magnetite (Fe 3 O 4 ) nanoclusters as high-performance electrocatalysts poses a great challenge, as the size significantly affects their properties. Here, we present a modified polyol process for tuning the size of Fe 3 O 4 nanoclusters in the presence of an ionic liquid. The average size of the as-prepared nanoclusters, which are composed of nanocrystals with a fixed size ( ∼ 5 . 6 nm), can be effectively adjusted from 236 nm to 63 nm with the increase of the added volume of ionic liquid from 0 μ L to 2 0 μ L. The nanoclusters were successfully used as catalysts for OER, and those with a size of 63 nm showed the highest catalyst activity, possessing 336 mV of overpotential under 20 mA cm − 2 of current density. The result of the double-layer capacitance analysis firmly confirms that the large electrochemical active area of the magnetite nanoclusters provides more catalytic active sites, which leads to higher catalyst activity. Furthermore, the magnetite nanoclusters exhibit stable catalyst performance and can maintain oxygen evolution activity for a long time. This process provides a new strategy for the size-controlled synthesis of other metal oxide nanoclusters that could be an effective substitute for OER noble metal catalysts.
研究领域:
材料科学
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电化学
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纳米技术
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能量转换
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催化
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yuxin Qi,Ying Bi,Chao Kong,Changyin Zhu,Hu Cheng,Yinlong Zhang,Jiangang Han,Jianming Xue,Ziyan Li,Yang Song,Dongmei Zhou
Recycling difficult-to-degrade plastics, also known as “white pollution”, is currently being researched in the fields of materials and the environment, which is an extremely challenging topic. In this study, a pyrolysis-activation method combined with multiple activators was developed to prepare stable porous plastic chars (PPCs) from discarded plastic bottles for removing the typical antibiotic sulfamethoxazole (SMX). Micro/mesopores were formed in the PPCs, with the specific surface area reaching 961.20 m 2 /g. C, O, and N were the main elements in the PPCs, and their atomic ratios showed the hydrophobicity and aromaticity. Graphite-like structures and abundant surface functional groups were generated in the PPCs. Unlike conventional char materials, impurities, such as aluminum oxide, have high reflectivity, resulting in the appearance of many shining spots. PPCs display a high sorption capability for SMX, with the maximum sorption quantity determined reaching 487.52 mg/g. Multilayer sorption is dominated by physical processes, and pore filling, partitioning, hydrogen bonding, π-π stacking, and electrostatic interactions are the main sorption processes. Chemical-like sorption and mass transfer control the sorption rate. Furthermore, PPCs have stable performance and good recyclability and could be used for practical applications. This study provides a novel strategy and an example of the upcycling of discarded plastic as an excellent char material for environmental remediation.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-10
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IF 3.8
Zhu Dancheng,Wu Yifan,Zheng Kai,Xu Hao,Chen Chao,Qiao Jun,Shen Chao
In this study, we deposited Ti 3 C 2 T x -modified, rare-earth-doped PbO 2 on the surface of a carbon fabric via electrodeposition. The surface morphology and electronic structure of the electrode were characterized with SEM, XRD and XPS. The layered Ti 3 C 2 T x did not change the structure of β-PbO 2 , and at the same time, it improved the crystallinity of the material and reduced the grains of PbO 2 . Electrochemical experiments showed that the addition of Ti 3 C 2 T x increased the electrochemical activity of the electrode and produced more H 2 O 2 , which contributed to the degradation of pollutants. The efficiency of sulfamethoxazole (SMX) degradation reached 95% after 120 min at pH 3 with a current density of 50 mA/cm 2 . Moreover, the electrode has good cycling performance, and the degradation efficiency was still 80% after 120 min after 10 cycles of recycling. Based on the intermediates identified by HPLC‒MS, a mechanism for SMX degradation was proposed. Our results will provide a new idea for the development of efficient electrocatalytic degradation of antibiotics.
研究领域:
环境科学
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材料科学
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电化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Wang Tang,Tianxiong Liu,Hongxia Gao,Shaofei Wang,Min Zhou,Ningbo Yu,Zhiwu Liang
In this study, the viscosity of 12 alkanolamine or diamine aqueous solutions was measured at atmospheric pressure, with amine mass fractions ranging from 15 % to 100 % and temperatures ranging from 293.15 K to 353.15 K. An empirical model was used to correlate the viscosity experimental results of the 12 alkanolamine or diamine systems. Building upon the empirical model, the influence of chemical structure on viscosity was further explored, and two artificial neural networks with different data partitioning schemes, namely R-ANN and C-ANN, were developed. The mean absolute error (MAE) of the R-ANN and C-ANN models were 0.42 and 0.53, respectively. The evaluation results demonstrated that the R-ANN model effectively predicted the viscosity of the 12 alkanolamine and diamine systems. Additionally, the C-ANN model showed reliable predictive performance on a test set consisting of new amines—those not included in the training set. Finally, the structure–activity relationship between amine structure and viscosity was analyzed by calculating the electrostatic potential (ESP) of amine molecules. This research provides an effective theoretical framework and computational approach for predicting and understanding the viscosity of amine aqueous solutions.
研究领域:
化学工程
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计算化学
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DOI
高影响因子
AICHE JOURNAL
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2026
·
IF 4
Ningbo Yu,Shaofei Wang,Min Zhou,Min Xiao,Bo Jin,Hongxia Gao,Zhiwu Liang
Amine-based water-lean solvents serve as energy-efficient absorbents for carbon dioxide (CO 2 ) capture but face paradoxical kinetic challenges, where the mixed solvents inconsistently accelerate or decelerate reaction rates across amine classes. By integrating stopped-flow kinetics, molecular dynamics simulations, and electrostatic potential analysis, we elucidate water modulates CO 2 absorption in mixed absorbents systems via amine-specific solvent encapsulation effect for the first time. For primary amines (e.g., monoethanolamine, MEA), water preferentially hydrates nucleophilic nitrogen atoms, forming steric barriers that impede CO 2 access and suppress kinetics with increasing hydration. Conversely, secondary amines (e.g., methylaminoethanol, MAE) exhibit oxygen-directed hydration, which weakens nitrogen solvation and enhances electrostatic CO 2 -amine interactions, accelerating kinetics. A zwitterion-based kinetic model quantifies these solvent-induced activation energy shifts, revealing a universal mechanism validated across diverse solvent systems. This work establishes molecular design principles for tailoring water-lean absorbents, bridging the critical gap between solvent engineering and reaction pathways to advance energy-efficient carbon capture technologies.
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高影响因子
危险品化学品经营许可证（带存储）