ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Minghan Wu,Siqi Hao,Linfeng Qi,Yu Shi,Wei Yang,Jingjing Bao,Min Du,Zhengyu Mo,Licheng Sun
Thermogalvanic cells (TGCs) are at the forefront of effective thermoelectric conversion methods, but the practical utilization of their integrated devices is hindered by the suboptimal performance of N-type TGCs. Herein, a novel redox couple of Cu/Cu(en)22+ is proposed to construct a liquid-state N-type TGC. The electrochemical reaction involving the Cu electrode, ethylenediamine (en), and their chelated compound Cu(en)22+ exhibits a significant reaction entropy change, resulting in an enhanced temperature coefficient (α). We reveal that the α of the Cu/Cu(en)22+-based TGC reaches 1.64 mV K–1. Furthermore, by optimizing the concentrations of Cu2+, ethylenediamine, and (NH4)2SO4 in the electrolyte, both α and normalized power density can be significantly improved, achieving values of 2.12 mV K–1 and 676 μW m–2 K–2, respectively. Moreover, by constructing a P–N junction with P-type and N-type TGC, we achieve a high potential of 121 mV under a temperature gradient of 35 K. This work expands the available redox couple options for N-type TGCs and offers a new pathway for efficient thermoelectric conversion.
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Zhi-Juan Zhang,Peng-Wei Li,Lu-Ping Liu,Li-Hua Ru,Han-Xiao Tang,Wei-Sheng Feng
The analysis of breath VOC biomarkers is an efficient method for the early diagnosis of lung cancer. In this work, the zirconium UiO-66 was post-synthetically modified by using methylamine (MA), ethylenediamine (ED) and N,N′ -dimethylethylenediamine (MMEN), respectively. The modified UiO-66 materials were thoroughly characterized, including PXRD , FTIR, TGA , physical adsorption at 77 K by nitrogen and photoluminescence analysis. The sensing properties of the modified UiO-66 materials toward the selected five potential breath VOC biomarkers were investigated. Results showed that after modification, the BET surface area and total pore volume all decreased, and followed the order: UiO-66 > UiO-66-MA > UiO-66-MMEN > UiO-66-ED. Furthermore, the N–H group was successfully grafted into the modified UiO-66 samples. In comparison with UiO-66, the fluorescence intensities of UiO-66-MA, UiO-66-ED and UiO-66-MMEN toward hexanal , styrene and isoprene all obviously increased, while the fluorescence intensities of the modified UiO-66 materials toward 1-propanol and ethylbenzene all decreased a lot, accompanied by the frequency shift. In addition, the LOD of hexanal on UiO-66-MA was calculated to be as low as 12 ppm, which was obviously lower than that of UiO-66 (31 ppm). The fluorescence quenching of hexanal was mainly due to the FRET mechanism. The results of this study would provide information for the development of early breath diagnosis of lung cancer.
研究领域:
医学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·
IF 4.229
Meiqing Chen,Pingxiao Wu,Yajie Zhu,Shanshan Yang,Yonghong Lu,Zhang Lin
In order to enhance the visible light-driven photocatalytic H 2 production activity of CdZnS, an ethylenediamine-assisted hydrothermal pathway was used to synthesize CdxZn1-xS(en) with different Cd/Zn molar ratios . It was found out that the prepared Cd 0.5 Zn 0.5 S(en) possessed the highest photocatalytic H 2 production rate of 13539.0 μmol h −1 g −1 that was higher than that of CdZnS. The key to this achievement could be ascribed to the stacking faults formation, the optimum band gap with conduction band position and small crystallite size. Based on this, Cd 0.5 Zn 0.5 S(en) was modified by NiS for further improving the activity. The obtained Cd 0.5 Zn 0.5 S(en) NiS with NiS loading content of 0.25 wt% exhibited much higher photocatalytic H 2 production rate, reaching up to 38187.7 μmol h −1 g −1 that were among the highest efficiencies for semiconductor photocatalysts ever reported. It was confirmed that the nanosized NiS anchored on Cd 0.5 Zn 0.5 S(en) interface, acting as electron trapping sites, attributed to the spatial suppressions of electron-hole recombination. Meanwhile, the NiS loaded on the surface optimized the photogenerated electron transfer pathway between the semiconductor materials that gives rise to significantly enhanced photocatalytic activity . This study would put forward a facile method for developing high photocatalytic activity and low-cost catalytic material for H 2 production, which provide a new thought to address the global energy crisis and the environmental contamination.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
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2020
·Vol. 13
·期 2
·326
·
IF 3.057
Yanxuan Ma,Yingrui Zhang,Jiatong Liu,Yi Sun,Yajie Ge,Xiaoning Yan,Jian Wu
Polyurea microcapsules with Ethylenediamine (EDA) as the core material were synthesized. A set of characterization methods, including optical and scanning electron microscopy (OM and SEM), the Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) were used to confirm the microcapsule morphology and chemical structures. The influence of emulsifier content and stirring rate on size and morphology of the microcapsules was investigated, and the self-healing performance of EDA-Polyurea microcapsule/epoxy coatings was evaluated by electrochemical impedance spectroscopy (EIS) measurements. The results showed that the microcapsules obtained had good spherical shape with a mean diameter of 0.54–0.70 μm. Compared with pure core material, the microcapsule showed excellent thermostability, and the content of core materials was up to 56.00 wt%. The epoxy coating with 5.0 wt% EDA-Polyurea microcapsules achieved average corrosion resistance efficiencies of 90.00%, significantly enhancing the capability of the scratched coating to resist external corrosion.Keywords:ethylenediamine;polyurea;microcapsules;self-healing;anti-corrosion
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2012
·Vol. 22
·期 15
·7502-7506
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IF 5.968
Hechun Jiang,Pengcheng Dai,Zhenyu Feng,Weiliu Fan,Jinhua Zhan
Cu2ZnSnS4 (CZTS) is acknowledged as an alternative to traditional p-type semiconductors. Traditionally obtained CZTS, however, is mostly kesterite or stannite phase, which features a tetragonal crystal cell. Herein, novel orthorhombic CZTS has been synthesized via an ethylenediamine-assisted hydrothermal method. Ethylenediamine plays an important part in the construction of the orthorhombic phase. Kesterite CZTS was also obtained in an ultrapure water system without ethylenediamine. The structure was confirmed by XRD, XPS and HRTEM. The band gap of the orthorhombic CZTS is about 1.45 eV, which approaches the optimum value for solar photoelectric conversion. What's more, we found that this orthorhombic CZTS is metastable. After annealing at 500 °C, a phase transformation from the orthorhombic structure to the tetragonal kesterite structure was achieved. The photoelectric response was also characterised, which demonstrated its potential for application in photovoltaic devices.
研究领域:
材料科学
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光伏技术
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DOI
高影响因子
RSC Advances
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2025
·Vol. 15
·期 1
·420-427
·
IF 4.6
Zongmei Huang,Jing Li,Lu-Shuang Li
Levodopa (L-Dopa), a precursor drug for dopamine has been widely used to treat Parkinson's disease. However, excess accumulation of L-Dopa in the body may cause movement disorders and uncontrollable emotions. Therefore, it is vital to monitor L-Dopa levels in patients. In this study, a carbon dot (CD)-based fluorescence sensing system was developed for sensitive detection of L-Dopa. The CDs were prepared using a novel biomass, Pandanus amaryllifolius Roxb., as a carbon source via a simple hydrothermal method. Interestingly, it was found that ethylenediamine doping in the preparation system increased the quantum yield of CDs, as well as their fluorescence response sensitivity to L-Dopa. After optimizing the preparation and sensing conditions, the detection limit of L-Dopa decreased from 1.54 μM to 0.05 μM. A complete methodological validation was conducted and the probe was successfully applied to the determination of L-Dopa in fetal bovine serum with excellent precision (RSD ≤ 2.99%) and recoveries of 88.50–99.71%. Overall, this work provides an effective strategy for the regulation of properties of CDs derived from biomass and an innovative method for clinical L-Dopa monitoring.
研究领域:
医学诊断
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材料科学
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药物分析
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 2
·211
·
IF 3.52
Yongxin Zhang,Long Lin,Xiaoming Zheng,Chunyan Liu,Quanren Zhu,Hongchen Guo
In this study, a series of SnO2modified zeolite catalysts (Snx-S-1; x is the weight percentage of Sn) were prepared with SnCl2and a defective Silicalite-1 (S-1) zeolite via facile deposition–precipitation method. It was found that the stannic species modified all-silica zeolite catalysts were active for the intermolecular condensation of ethylenediamine (EDA) to 1, 2-Diazabicyclo [2, 2, 2] octane (TEDA) and piperazine (PIP). The best catalyst Sn6-S-1 (6 wt.% Sn loading) showed 86% EDA conversion and 93% total selectivity to TEDA and PIP. By contrast, the defective S-1 zeolite parent showed only approximately 9% EDA conversion under the same conditions. With the help of catalyst characterization techniques including hydroxyl vibration and pyridine adsorption FT-IR spectroscopy (transmission mode), the enhancement of the catalytic activity of the SnO2modified zeolite catalysts (Snx-S-1) was mainly attributed to the formation of mild Lewis acid sites in the siliceous zeolite. Both the hydroxyl nests of the defective S-1 zeolite and the dispersed SnO2clusters should be the important factors for the formation of mild Lewis acid sites on the modified zeolite. Based on the catalytic performance of the modified zeolite in the conversion of EDA to PIP and TEDA, it is inferred that the mildly acidified defective S-1 zeolite by the SnO2deposition modification might become a very active and durable catalyst for reactions involving strongly alkaline reactants and products.Keywords:defective Silicalite-1;SnO2modification;acidity;condensation of ethylenediamine
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Peng Liu,Ni Yuan,Wei Xiong,Hanyu Wu,Duoqiang Pan,Wangsuo Wu
β-Zeolite was synthesized and modified with ethylenediamine (EDA). The synthesized materials were characterized and used for the removal of nickel(II) from aqueous solutions. The influences of the pH, contact time, and temperature on nickel(II) adsorption onto synthesized β-zeolite and β-zeolite modified with ethylenediamine (β-zeolite–EDA) were studied by a batch technique, and X-ray photoelectron spectroscopy was employed to analyze the experimental data and identify the formation of coordination bonds between the adsorbents and nickel(II). The dynamic process showed that the adsorption of nickel(II) onto β-zeolite and β-zeolite–EDA matched the pseudo-second-order kinetics model, and the adsorption of nickel(II) was significantly dependent on the pH values. Through simulation of the adsorption isotherms by the Langmuir, Freundlich, and Dubinin–Radushkevich models, it could be seen that the adsorption patterns of nickel(II) onto β-zeolite and β-zeolite–EDA were mainly controlled by surface complexation and the adsorption processes were endothermic and spontaneous. The modification of β-zeolite–EDA improved the adsorption capacity of nickel(II) significantly; this shows a novel material for the removal of nickel(II) from the water environment for industrialized application.
研究领域:
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
PHYSICS AND CHEMISTRY OF LIQUIDS
·
2017
·
IF 1.145
Bosheng Zhao,Lihua Liu,Xiaoxia Yang,Chang Liu,Feng Sha,Jianbin Zhang
Thermophysical properties for binary mixture of tetraethylene glycol (T4EG) (1) + 1,2-ethanediamine (EDA) (2), a potential scrubbing solution for the absorption of CO2, are very important as well as lacking in the literatures. This work reports densities and viscosities over the entire concentration range for the binary mixture at T = (293.15-318.15) K under atmospheric pressure. According to the experimental density and viscosity values, the mixtures’ excess molar volume (VmE), absolute viscosity deviation (∆η), excess free energies of activation (∆G*E), apparent molar volumes, partial molar volumes and isobaric thermal expansion coefficient were calculated, respectively. Meanwhile, the VmE, ∆η and ∆G*E values were fitted by a Redlich–Kister equation to obtain coefficients. To further study, the Fourier transform infrared, UV-Vis and fluorescence spectra of T4EG + EDA mixtures with various concentrations were measured, and the intermolecular interaction of T4EG with EDA was also discussed as the formation of –OCH2CH2O–H···N(H2)CH2CH2(H2)N···.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
Water Cycle
·
2023
·
IF 0
Yuankun Liu,Xinxia Zhang,Liyuan Zhao
In this work, the magnetic chitosan nanoparticles were prepared by in-situ co-precipitation method and then modified by glutaraldehyde and ethylenediamine. The effect dose of crosslinking agents for adsorbent preparation on tetracycline (TC) adsorption was investigated. The experiment results showed that the modified chitosan (EMMCS-G) had the best adsorption performance, which was more than twice that of raw magnetic chitosan. EMMCS-G was characterized by SEM, TEM, VSM, FTIR, XRD and XPS. The effects of experimental parameters such as time, temperature, pH, adsorbent dosage and Cu 2+ on TC adsorption by EMMCS-G were discussed. The result indicated that the optimal pH was 6.5. Under the conditions of an initial TC concentration of 50 mg/L and an EMMCS-G dosage of 50 mg, the removal rate reached an impressive 94%. The isotherm and kinetic studies of adsorption process illustrated that adsorption of TC onto EMMCS corresponded to Freundlich isotherm and pseudo-second-order kinetic models. The maximum adsorption capacity was 84 mg/g. Thermodynamic analysis revealed that adsorption process was both endothermic and spontaneous. The regeneration experiment suggested that the adsorbent possessed excellent reusability for further use. Moreover, the adsorption mechanisms of TC onto EMMCS-G mainly involved pore filling, π-π interactions, hydrogen bonding and electrostatic attraction.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
Crystals
·
2018
·Vol. 8
·期 11
·397
·
IF 2.144
Lingxiao Chen,Hang Liu,Linghao Liu,Yifan Zheng,Haodong Tang,Zongjian Liu
Ni nano-micro structures have been synthesized via a solution reduction route in the presence of ethylenediamine (EDA) under strong alkaline conditions. The phase composition, morphology, and microstructure of the resulting products are investigated by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The presence of EDA plays an important role in the formation of Ni nano-micro structures, and microflowers or microspheres assembled from nanosized horns can be produced by changing the amount of EDA. The size of Ni nano-micro structures is dependent on the NaOH concentration, and long chains assembled from Ni nano-micro structured microspheres can be obtained by reducing the amount of NaOH solution used. The role of both EDA and NaOH in the reduction of Ni (II) to Ni, as well as in the growth of Ni nano-micro structures, has been discussed, and a possible formation mechanism of these Ni nano-micro structures has been proposed based on the experimental results.Keywords:ethylenediamine;microspheres;nanohorns;nano-micro structures;nickel
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 11
·e202200423
·
IF 4.782
Wei-Qing Li,Lei Jin,Jia-Qiang Yang,Zhao-Yun Wang,Dongping Zhan,Fang-Zu Yang,Zhong-Qun Tian
Graphical Copper Electronic Electroplating : A novel copper electroplating bath in weak alkalinity and containing citrate (Cit) and ethylenediamine (En) in the through-hole thickening of printed circuit board (PCB) was presented. The selective adsorption of Cit−Cu and En−Cu coordination ions at different sites was driven by respective overpotential in TH of PCB for conformal copper electroplating. In this work, an electronic copper electroplating bath with low copper ion concentration and preeminent throwing power in through hole (TH) thickening of the printed circuit board (PCB) was successfully developed. Based upon the weak alkaline bath containing the composite complexants of citrate (Cit) and ethylenediamine (En), their synergistic effects on the preeminent bath throwing power were carefully investigated and theoretically proved. The UV-vis spectroscopy results illustrated that En exhibited a stronger coordination ability with Cu (II) ion than citrate, and the stoichiometric coordination ratio between En and Cu (II) ion was 2 : 1. The linear sweep voltammetry (LSV) results showed that the electro-reduction peak potential of Cit−Cu coordination ion was −0.55 V (vs. Hg/HgO), whereas that of En−Cu ion was at a more negative potential of −0.82 V. The in situ Fourier transform infrared (FTIR) spectroscopy revealed that the adsorptions of the Cit−Cu and En−Cu coordination ions were potential dependent on the copper electrode. The Cit−Cu coordination ion was easily adsorbed at the interior sites of through holes with lower over-potential to promote the growth of copper coating. Moreover, the En−Cu coordination ion adsorbed preferably on the surface and the edge of through hole for its higher electro-reduction overpotential, to hinder the germinating of copper nuclear. The cross-section observation of optical microscope proved that the throwing power of novel copper electroplating bath behaved surpassingly, up to 105.8 %.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）