PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2017
·Vol. 19
·期 35
·23898-23904
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IF 4.123
Congdi Shang,Li Wang,Yanqin An,Ping Chen,Xingmao Chang,Yanyu Qi,Rui Kang,Yu Fang
Fast, sensitive and selective detection of diamines in the vapor phase is of pivotal importance for air and food quality monitoring. In this work, an electron-poor fluorophore, perylene bisimide (PBI), was modified with hydrophilic residues at its bay positions, resulting in an amphiphilic derivative, PEBBO. Photophysical studies revealed that the compound shows a strong aggregation tendency in various solvents, but the aggregates could be highly fluorescent provided suitable solvents are used. Accordingly, a fluorescent film was constructed via utilization of the well-known Langmuir–Blodgett technique. Sensing performance studies revealed that the film as prepared is sensitive and selective to the presence of diamines in air. Specifically, (1) the experimental detection limit is lower than 0.016 g m−3 and the linear range of the analysis extends from 0.33 g m−3 to 8.20 g m−3 when ethylenediamine was adopted as an example analyte; (2) the presence of other amines and solvents shows little effect upon detection; (3) the response time is less than 5 s. Considering the importance of diamine sensing, the convenience of fluorescence techniques and the superiorities of the film and method as developed, it is believed that the present work is of great importance for promoting technical progress in diamine sensing.
研究领域:
化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Haonan Liu,Ruixi Liu,Ali Hassan Bhatti,Mamoona Waris,Qingzhi Zhang,Yingjie Niu,Francesco Barzagli,Ruqi Xiao,Chao’en Li,Rui Zhang
Accurately predicting CO 2 equilibrium solubility is essential for optimizing amine-based sorbents in carbon capture processes. However, traditional experimental approaches require extensive testing, making data collection time-consuming and often incomplete. In this study, we address this challenge by developing six machine learning models to predict CO 2 solubility in three dual-amine blends (MEA + MDEA, MEA + DEEA, and MEA + DMEA), significantly reducing the reliance on labor-intensive experiments. The PSO-BPNN model achieved the highest accuracy, with errors below 2.2 %, demonstrating the potential of machine learning to provide reliable solubility data without exhaustive experimental measurements. Additionally, we experimentally evaluated the CO 2 absorption and desorption performance of MEA-based blends, complemented by 13 C NMR spectroscopy to elucidate reaction mechanisms. Among the tested systems, the 2 M MEA + 3 M DEEA blend exhibited the highest CO 2 loading, fastest desorption rate, and lowest heat duty compared to 5 M MEA, underscoring its potential as a superior sorbent for energy-efficient CO 2 capture.
研究领域:
化学工程
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环境科学
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人工智能
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DOI
高影响因子
MATERIALS LETTERS
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2019
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IF 3.019
Ning Cao,Rujian Jiang,Lingwan Hao,Limei Tian,Ru Mo,Yong Fan,Jie Zhao,Luquan Ren
Herein, we report an effective bacterial anti-adhesive and bactericidal coating based on a Schiff-base reaction. The hydrophilic polyoxyethylene-bis-amine (PEG-bis-amine) is introduced in the system to endow the coating with valid bacterial anti-adhesive performance, while the tobramycin (Tob) with multi-amines serves as both a bactericidal agent and one of the cross-linkers for the construction of polyimide networks. The coating is obtained via a facile solvent-annealing method. This type of dual-functional antibacterial coating may provide as an excellent antibacterial platform for broad applications in bactericidal surfaces.
研究领域:
材料科学
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生物医学工程
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微生物学
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DOI
高影响因子
Journal of CO2 Utilization
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2019
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IF 5.189
Jing Chang,Chengming Hou,Donghai Wan,Xiuli Zhang,Bin Xu,Hongjing Tian,Xia Wang,Qingjie Guo
An alcoholamine, 2-[2-(dimethylamino)ethoxy]ethanol (DMAEE), was co-tethered with pentaethylenehexamine (PEHA) on the surfaces of the flue gas desulfurized gypsum (FGDG) carriers to synthesize a solid bi-amine adsorbent. The effects of temperature, loading of the blended amines, mass ratio of DMAEE to PEHA, CO 2 partial pressure on the CO 2 adsorption performance were discussed. The water of hydration contained in the FGDG carriers promoted the CO 2 adsorption capacity of the bi-amine adsorbent. Both the breakthrough time and the saturation adsorption capacity of the bi-amine adsorbent were distinctly higher than the DMAEE or PEHA singly tethered adsorbents. The adsorption capacity of the bi-amine adsorbent decreased by only 1.86% over twelve cycles. The isosteric heat of adsorption Q s t and the mean free energy of adsorption E f e was determined and both the values indicated that the adsorption was primarily chemisorption. In the kinetics analysis, Avrami model fitted best with the measured adsorption capacity. With the aid of the 13 C–NMR quantitative analysis results, the CO 2 adsorption mechanism of the bi-amine adsorbent in the presence of the water of hydration was revealed. For the bi-amine adsorbents supported on some porous carriers, FGDG particles were testified to replace up to 7 wt.% of montmorillonite clay or 7 wt.% of MCM–41 zeolite or 10.5 wt.% of ZSM–5 zeolite without any decrease in the CO 2 adsorption capacity.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Hongjing Tian,Jin Du,Peng Lu,Shengnan Xu,Yanxia Guo,Jixing Tang,Man Wu,Qingjie Guo
A novel solid bi-amine adsorbent was synthesized by simultaneously impregnating pentaethylenehexamine (PEHA) and aminoethylethanolamine (AEEA) on the surfaces of mesoporous MCM–41 nanospheres. AEEA and PEHA had a synergistic effect during the CO 2 adsorption of the bi-amine adsorbent and the highest CO 2 adsorption capacity was 4.03 mmol·g −1 . The bi-amine adsorbent exhibited the favorable recyclability because its saturated CO 2 adsorption capacity decreased by 6.20 % after the initial eight adsorption/desorption cycles while by only 2.23 % in the following seven cycles. The adsorption activation energy and the desorption activation energy were determined to be 12.53 and 16.81 kJ·mol −1 , respectively. The low value of the desorption activation energy suggested an inconsiderable energy requirement in the multicycles of the adsorbent. The characterization results indicated that hydrogen bonds were formed between the hydrogen atom in hydroxyl groups of AEEA and the oxygen atom in carbonyl groups of the carbamate. The synergistic effect between AEEA and PEHA was unveiled on the CO 2 adsorption of the bi-amine adsorbent. The formed hydrogen bonds facilitated the release of protons from carbamic acids, enhanced the stability of the produced carbamate anions, and thus boosted the CO 2 adsorption performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Rui Zhang,Yufan Li,Xinwei He,Yingjie Niu,Chao'en Li,Mohammad Waleed Amer,Francesco Barzagli
Mixing amines with different properties is considered a smart strategy for developing efficient aqueous solutions for reversible CO 2 capture. Specifically, dual-amine blends containing the tertiary amine 2-dimethylamino-2-methyl-1-propanol (2DMA2M1P) have proven to be particularly advantageous due to significantly lower regeneration costs compared to conventional sorbents. With the aim of formulating high-efficiency sorbents, in this work we evaluated the improvement in the CO 2 capture performance of such dual-amine blends by adding a further amine to form trio-amine systems: the use of three amines with different characteristics could further emphasize the advantages obtainable during both absorption and desorption. We formulated three new different aqueous solutions prepared by mixing 2DMA2M1P with the reaction rate promoter ethanolamine (MEA) and the absorption capacity promoter 2-amino-2-methyl-1-propanol (AMP) in different molar ratios. For each blend, the CO 2 solubility at equilibrium, the CO 2 absorption rate from a gaseous mixture, the regeneration rate at T = 373 K and the energy requirement for desorption were determined experimentally. In addition, to better understand the capture mechanism, 13 C NMR spectroscopy was employed to evaluate the speciation of each blend during the CO 2 absorption. Their CO 2 capture performance was compared with that of the benchmark aqueous MEA and two 2DMA2M1P-based dual-amine mixtures, obtained with the same procedure. As a finding, all formulated trio-amine blends have superior CO 2 equilibrium solubility and desorption performance compared with MEA 5 M. Noteworthy, the comparison with similar dual-amine systems highlighted the role of a suitable third amine in order to obtain enhance both absorption and desorption efficiencies. Among the formulated systems, MEA-2DMA2M1P-AMP (1:2:2) is potentially the most suitable to replace MEA in CO 2 capture processes after a careful cost-benefit analysis on larger scale systems.
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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DOI
高影响因子
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