FLUID PHASE EQUILIBRIA
·
2024
·
IF 2.8
Nan He,Yukun Zhang,Fenhong Song,Jing Fan,Xiwu Zhang
Deep eutectic solvents (DESs) have appealed increasing research interest across various scientific and industrial applications, notably in relation to efforts in CO 2 capture. This study presents a novel series of DESs were synthesized on the basis of monoethanolamine (MEA) and N-methyldiethanolamine (MDEA) as hydrogen bond donors with tetrabutylammonium bromide (TBAB) and tetrabutylphosphine bromide (TBPB) salt as hydrogen bond acceptors. A gas solubility measurement experimental system based on pressure drop method has been established to evaluate the solubility of CO 2 in amine-based deep eutectic solvents. The evaluation was performed over a temperature range of 303.15 to 323.15 K and a pressure range of 100 to 1000 kPa. The results indicated that as the molar ratio of hydrogen bond donors increases, the solubility of CO 2 in DESs increases, while it was found to be less affected by the hydrogen bond acceptor. Of these, the solubility of CO 2 is strongest at a 1:10 molar ratio of TBAB and MEA. The nuclear magnetic resonance spectroscopy spectra (NMR) and FTIR spectroscopy revealed that the MEA-based DES mixture primarily exhibited chemical absorption of CO 2 , while the MDEA-based DES predominantly showed physical dissolution of CO 2 . In addition, it was observed that both temperature and pressure significantly influenced the CO 2 solubility, and a successful correlation was developed using different semi-empirical models.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2024
·
IF 5.5
Huikai Shao,Zhenping Liu
A selective and sensitive epitope imprinted electrochemical sensor for the precise quantification of alpha-fetoprotein (AFP) was developed through electropolymerization by using the C-terminus of alpha-fetoprotein as the template and o-phenylenediamine as the functional monomer. The prepared epitope molecularly imprinted polymer film was characterized by the scanning electron microscope (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Experimental parameters including the molar ratio of template to functional monomer, electropolymerization cycle, elution time and rebinding time were systemically investigated and optimized. Under optimized conditions, the proposed epitope imprinted electrochemical sensor demonstrated outstanding sensing capabilities within the alpha-fetoprotein concentration range of 0.1 pg mL −1 to 1.0 μg mL −1 , with a limit of detection of 0.075 pg mL −1 . Furthermore, this electrochemical sensor exhibited exceptional selectivity when tested against other proteins or disease biomarkers, including human serum albumin, bovine serum albumin, prostate-specific antigen and carcinoembryonic antigen. In practical application, it was successfully employed for the analysis of alpha-fetoprotein in human serum samples, yielding a recovery rate ranging from 99.70 % to 108.48 %. This study proposed a straightforward approach for the construction of epitope molecularly imprinted electrochemical sensor tailored for the determination of alpha-fetoprotein.
研究领域:
分析化学
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生物传感器
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电化学
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分子印迹
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医学诊断
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Jia Liu,Houfang Lu,Yingying Liu,Kejing Wu,Binshen Wang,Yingming Zhu,Bin Liang
As a highly toxic gas, H2S is conventionally removed via a chemical absorption process. However, the high regeneration energy is still a challenge. 1,5-Diazabicyclo[4.3.0]non-5-ene (DBN)/polyethylene glycol dimethyl ether (NHD) solution was developed as an efficient nonaqueous phase change absorbent for the removal of H2S with low energy consumption. A homogeneous DBN/NHD solution turns into two immiscible liquid phases upon the absorption of H2S, which results from the higher polarity of the product compared to that of the original solution. The loading capacity of H2S can reach 0.16 g·g–1 solvent even under a H2S partial pressure of 10 kPa at 30 °C. After absorption, more than 94% of the absorbed H2S is concentrated in the lower phase, which can be regenerated at 90 °C with an energy consumption estimated to be 1.69 GJ·t–1 H2S. The regeneration energy is 58% lower than that of 30 wt % aqueous solution of N-methyldiethanolamine. 81% of the initial H2S loading was maintained after 4 absorption–desorption cycles. In addition, the selectivity of DBN/NHD solution to absorb H2S from N2 containing H2S and CO2 or from N2 containing H2S and CH4 was investigated. It shows that the selectivity increases with the increase in the volume ratio of H2S to CO2, which can be as high as 27.8 when the ratio is 1:1. CH4 cannot be absorbed in the DBN/NHD solution in the presence of H2S and N2.
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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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jingyi Zhao,Yidan Shan,Biao Chen,Mengxiang Fang,Renxian Wu,Wei Zhang,Tao Wang,Qinhui Wang
To reduce the high energy consumption associated with chemical absorption, catalysts are introduced into the regeneration stage. The absorption and desorption performance of mixed amine systems monoethanolamine (MEA)-methyldiethanolamine (MDEA)-2-Amino-2-Methyl-1-Propanol (AMP) and n-butyldiethanolamine (BDEA)-2-(2-aminoethylamino)ethanol (AEEA) is first explored in absorption and desorption experimental apparatus, with MEA as the benchmark for comparison. Four commercially available, low-cost catalysts (HZSM-5, Hβ, HY and γ-Al 2 O 3 ) are tested, and the optimal absorbent-catalyst combination, 20 %BDEA-20 %AEEA + γ-Al 2 O 3 is selected. A relevant study is conducted on a 10 Nm 3 /h bench-scale CO 2 capture plant using feed gas with composition of 12 % CO 2 to validate the industrial feasibility of the catalytic process., where optimal conditions are identified based on absorption efficiency, cyclic capacity, and heat duty. Under the condition of 1.8 kW heating power and 60 L/h flow rate, 20 %BDEA-20 %AEEA + γ-Al 2 O 3 achieves the lowest heat duty of 3.15 GJ/t CO 2 , with a capture efficiency of 92 %. This represents a 29.2 % reduction (4.45 GJ/t CO 2 ) compared to the BA system without catalyst under the same capture efficiency, and a 44.7 % reduction (5.7 GJ/t CO 2 ) compared to the traditional MEA solution. A 15-day cyclic life experiment demonstrates good performance under these optimal conditions, providing important insights for industrial applications.
研究领域:
化学工程
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碳捕集与封存
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催化
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分离过程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Lijie Fu,Juanjuan Gong,Hengyu Li,Jinhua Xiao,Bihong Lv,Xiaomin Wu,Zhiwei Huang,Zuoming Zhou,Guohua Jing
The regeneration of catalytic amine-based solvents using solid acid offers a promising approach to reduce energy consumption in CO 2 capture processes. Nickel-based solid acid catalysts, endowed with multiple Lewis acid sites, could enhance the efficiency of regeneration reactions. Nevertheless, the irregular pore structure of NiO and the deficiency in Brønsted acid sites posed significant challenges to the practical use of amine solvent regeneration in CO 2 vapor stripping processes. A highly effective solid acid catalyst, nickel-modified H-β (Ni/β), were synthesized to enhance CO 2 desorption from MEA solutions saturated with CO 2 . The catalyst with 1.25% Ni (1.25% Ni/β) exhibited the highest activity and stability, with a 43.19% increase in the amount of desorbed CO 2 and a 30.16% reduction in relative heat duty. The catalyst maintained excellent stability, enhancing the desorption performance of MEA after ten cyclic absorption–desorption experiments. According to theoretic calculations and experimental analyses, the incorporation of H-β zeolite significantly enhanced the specific surface area of the composite and introduced a substantial number of Brønsted acid sites. Concurrently, the introduction of metal nickel substituted the hydrogen proton on the hydroxyl groups of the H-β molecular sieve, increasing the Lewis acid sites and modulating the Brønsted-to-Lewis acid site ratio. The Brønsted acid sites functioned as proton donors, while the Lewis acid sites facilitated N-C bond cleavage, promoting carbamate decomposition and the deprotonation of protonated amines. This work presents a valuable solid acid catalyst for amine-based CO 2 capture and offers insights for developing innovative solid acids for various catalytic processes.
研究领域:
化学工程
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环境科学
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催化材料
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
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2025
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IF 3.6
Xin Liu,Xiaojun Wang,Rongrong Chen,Qi Liu,Dalei Song,Gaohui Sun,Jing Yu,Jingyuan Liu,Jiahui Zhu,Shifeng Guo,Jun Wang
Biological fouling will cause severe damage to the functionality of marine underwater facilities, shorten their service life, impede their normal operation, and trigger a biological invasion event. The traditional marine antifouling coatings release heavy metal elements, which cause harm to the marine environment. To overcome this issue, a self-polishing antifouling resin based on vanillin methacrylate (VMA) was prepared via the free radical polymerization method. In seawater, the VMA-based coatings achieve self-polishing through the hydrolysis of the phenolic ester group. The hydrolysis mechanism of VMA was calculated using density functional theory by Cp2k software, and the results show that VMA achieves one-step hydrolysis by the S N 2 mechanism. It exhibited antibacterial and environmentally friendly antifouling properties by releasing vanillin, which is a natural antifouling active substance. The antibacterial, diatom adhesion inhibition, and the 9-month marine field test demonstrated the excellent antifouling performance of VMA-based coatings. It provides a novel concept for environmentally friendly self-polishing coatings and has a promising application prospect. Graphical
研究领域:
材料科学
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海洋生物学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Qian Qiao,Tongge Zhao,Jian Zheng,Huiting Yin,Yuan Zhang,Jinhao Zang,Xun Yang,Haoyu Li,Taotao Rao,Xuan Yu,Xiaoming Yu
Self-powered poly (3-hexylthiophene)/zinc oxide (P3HT/ZnO) heterojunction ultraviolet photodetectors decorated by silver nanoparticles (Ag NPs) were fabricated by sol-gel and spin-coating techniques. The ultraviolet photoresponse performance of the P3HT/ZnO heterojunction photodetectors influenced by the position of plasmonic Ag NPs was investigated. The responsivity and detectivity of the P3HT/Ag/ZnO photodetector with placed Ag NPs at the interface of ZnO and P3HT layers enhanced to 1.92 and 1.15 times compared to the reference devices. When the Ag NPs embedded into ZnO layer , the responsivity, detectivity and external quantum efficiency were 16.42 mA/W, 5.97 × 10 11 Jones, and 5.36 %, respectively, which were 5.77 times, 4.64 times and 5.77 times to that of the pristine P3HT/ZnO photodetector. The enhancement mechanism of plasmonic metallic nanoparticles to the performance of the photodetectors was discussed in details. This study presents a simple route to high performance self-powered photodetectors.
研究领域:
材料科学
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光电子学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Yajun Mi,Wu Tong,Yin Lu,Xia Cao,Ning Wang
Currently, combining multimodal perceptual ability with mechanical robustness poses a significant challenge for developing hydrogel-based flexible electronics. Herein, a robust conductive hydrogel was successfully synthesized by introducing cellulose nanocrystals (CNC) as nanofillers and lithium chloride (LiCl) as the conductive component into the copolymer network through a one-pot crosslinking procedure in a water-dimethyl sulfoxide binary solvent. Besides excellent stretchable, self-adhesive, anti-freezing, self-healing, and anti-swelling properties, tunable and reversible optical property was realized due to the polarity-induced microphase separation of the hydrophilic and hydrophobic group in the zwitterionic sulfobetaine chains, enabling cyclic information encryption and decryption. An all-weather wearable sensor array was thus developed for multi-modal sensing of various environmental stimuli, including mechanical, and thermal variations. Specifically, the intensity and spatial distribution of strain can be detected almost in real time within a broad strain range, thus realizing speech recognation, text-to-speech and human electrocardiogram signal acquisition and underwater non-contact sensing functions. Notably, the CPAMD-based triboelectric nanogenerator demonstrates impressive temperature tolerance (−40 °C and 60 °C), and remarkable material identification capability. A non-contact proximity sensing sensor and a foul detection system were thus developed by coupling the piezoresistive, triboelectric and capacitive sensing metrics to serve as an electronic referee for identifying foul in curling. This work provides a valuable reference toward combining excellent mechanical robustness with balanced electrical performance for tactile perception and intelligent sports monitoring.
研究领域:
材料科学
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生物医学工程
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柔性电子学
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产品关联
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 2
·474
·
IF 3.4
Wenkai Zhao,Runxiang Tan,Yanping Yang,Haoyong Yang,Jianing Wang,Xiaodong Yin,Daheng Wu,Tao Zhang
Surface-enhanced Raman scattering (SERS) spectroscopy is a powerful technology in trace analysis. However, the wide applications of SERS in practice are limited by the expensive substrate materials and the complicated preparation processes. Here we report a simple and economical galvanic-replacement-assisted synthesis route to prepare Ag nanoparticles on Cu(0) foil (nanoAg@Cu), which can be directly used as SERS substrate. The fabrication process is fast (ca. 10 min) and easily scaled up to centimeters or even larger. In addition, the morphology of the nanoAg@Cu (with Ag particles size from 30 nm to 160 nm) can be adjusted by various additives (e.g., amino-containing ligands). Finally, we show that the as-prepared nanoAg@Cu can be used for SERS characterization of two-dimensional polymers, and ca. 298 times relative enhancement of Raman intensity is achieved. This work offers a simple and economical strategy for the scalable fabrication of silver-based SERS substrate in thin film analysis.
研究领域:
材料科学
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分析化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xiao-Chun Yang,Xiao-Xue Wang,Chen-Yu Wang,Meng Yin,Ke Ma,Yan Li,Ke-Zheng Chen,Sheng-Lin Qiao
Meningitis is a critical condition, particularly prevalent among young children, necessitating prompt diagnosis and intervention to prevent severe complications and mortality. This study presents the design and application of Janus-adhesive ionogels for real-time monitoring of physiological parameters with a focus on the early detection and management of infantile meningitis. The ionogel features a dual-layer structure, with an inner adhesive layer that strongly adheres to the skin and an outer anti-adhesive layer that minimizes external interference, ensuring accurate and reliable monitoring. These ionogels demonstrate superior properties such as high tensile strength, breathability, anti-freezing capabilities, and excellent ionic conductivity, making them ideal for continuous, long-term monitoring. The integrated monitoring system effectively tracks joint activity, body temperature, and ECG signals, providing real-time data critical for early warning and intervention in meningitis cases. This research represents a significant advancement in the field of wearable health monitoring technologies, showcasing the potential of Janus-adhesive ionogels to enhance the performance of wearable devices and contribute to personalized medicine.
研究领域:
医学
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Lichang Zhang,Yaxin Chen,Kaiyun Wu,Guanqing Sun,Ren Liu,Jing Luo
In this paper, a novel kind of amino-functionalized polyurethane capsules encapsulating self-healing agent (linseed oil) and corrosion inhibitor (benzotriazole) with an average size of 1.0 μm were prepared by “phase separation inside emulsion droplet” combined with photopolymerization. In our strategy, the formation of capsule and the modification of capsule shell by amino group were realized simultaneously in one-pot process for the first time, which was much simpler and more efficient compared with other well-developed synthetic methods. The amino-functionalized polyurethane capsules were incorporated in UV-curable resins to prepare green coatings with outstanding self-healing and anticorrosion performances. After modification by amino group, the dispersibility of PUA capsule in coatings was significantly improved and the interfacial compatibility between capsule and coating matrix was enhanced, which was beneficial to prepare coatings with excellent anticorrosion as well as self-healing performances. It has been demonstrated that the low frequency impedance of the coating based on amino-functionalized PUA capsules remained basically unchanged within 30 days and no obvious corrosion products were observed on the surface of coatings within 500 h. In the meanwhile, the scratches of coating with amino-functionalized PUA capsules were almost completely repaired, demonstrating much higher healing efficiency than the coating with unmodified capsules. With the scalable fabrication process, it can be envisioned that the one-pot efficient synthesis of amino-functioned capsules in this work has significant potentials for application in coatings, especially in self-healing and anti-corrosion coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2024
·
IF 10.4
Wei Wei,Donghui Li,Xiaoxuan Yan,Xujia Mu,Zhiyi Li,Zhijun Liu
In recent years, research into biphasic solvents has become an important direction more efficient control of CO 2 emissions. However, most biphasic absorbents still face challenges such as low cyclic capacity and high viscosity of the rich phase. To develop a novel solvent with enhanced cyclic capacity and reduced regeneration energy consumption, a biphasic solvent consisting of DETA/Isobutanol/H 2 O was proposed. The results demonstrate excellent absorption and desorption performance of the DETA/Isobutanol/H 2 O biphasic solvent, with an absorption capacity ranging from 1.13 to 1.35 mol/mol and a cyclic capacity ranging from 0.61 to 0.84 mol/mol. After conducting 5 times absorption-desorption experiments, the cyclic capacity of DETA/Isobutanol/H 2 O biphasic solvent remained at 0.8 mol/mol. The estimated energy consumption for regeneration, under lean phase load, was calculated to be 2.42 GJ/t CO 2 , which was 42.24 % lower than that of 30wt% MEA aqueous solution (4.19 GJ/t CO 2 ). The DETA/Isobutanol/H 2 O solution exhibits promising potential in terms of absorption-desorption performance and regenerative energy consumption, making it an exceptional CO 2 absorbent.
研究领域:
环境科学
·
化学工程
·
碳捕集与封存
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）