JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Dai Zhengyuan,Liu Hao,Sun Xuyuan,Wang Ying,Fan Jie,Li Li,Ding Yaping
Using o-phenylenediamine as carbon source and phytic acid as phosphorus source, two P-rich carbon quantum dots RCDs and BCDs were synthesized successfully by changing the reaction temperature and time of hydrothermal method. It was found that RCDs with red emission could realize sensitive detection of 2-methylimidazole, and 2-methylimidazole had no obvious quenching effect on BCDs with blue emission, which made RCDs a sensitive, quick and selective fluorescence sensor for 2-methylimidazole detection. Under the optimal experimental conditions, the fluorescence intensity of RCDs decreased with the increasing of 2-methylimidazole concentration. The detection of 2-methylimidazole concentration by the carbon quantum dots sensor showed a good linear relationship in the range of 5 ~ 110 µM, and the low detection limit was 0.61 µM (S/N = 3). The sensor is able to detect 2-methylimidazole in lake water, enabling the application of real samples. The results show that this work provides a simple fluorescence method to detect 2-methylimidazole in water.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2015
·
IF 2.133
Xiangli Guo,Tiantian Xing,Yongbing Lou,Jinxi Chen
Zeolitic imidazolate frameworks ZIF-67 were prepared under hydrothermal (120 °C) and non-hydrothermal (room temperature) from various cobalt sources and 2-methylimidazolate (Hmim) in aqueous solution within 30 min. The particle size and morphology were found to be related to the reactivity of the cobalt salt , Hmim/Co 2+ molar ratios and experimental condition. Using Co(NO 3 ) 2 as cobalt source, small-sized ZIF-67 crystals with agglomeration were formed. For CoCl 2 , small-sized rhombic dodecahedron were obtained. While large-sized crystals of rhombic dodecahedron structure were obtained from CoSO 4 and Co(OAc) 2 . Under hydrothermal condition, the size of ZIF-67 crystals tended to be more uniform and the morphology were more regular comparing to non-hydrothermal condition. This study provides a simple way to control the size and morphology of ZIF-67 crystals prepared in aqueous solution.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Jin Cao,Mingzi Sun,Dongdong Zhang,Yuefeng Zhang,Chengwu Yang,Ding Luo,Xuelin Yang,Xinyu Zhang,Jiaqian Qin,Bolong Huang,Zhiyuan Zeng,Jun Lu
Manipulating the crystallographic orientation of zinc deposition is recognized as an effective approach to address zinc dendrites and side reactions for aqueous zinc-ion batteries (ZIBs). We introduce 2-methylimidazole (Mlz) additive in zinc sulfate (ZSO) electrolyte to achieve vertical electrodeposition with preferential orientation of the (100) and (110) crystal planes. Significantly, the zinc anode exhibited long lifespan with 1500 h endurance at 1 mA cm–2 and an excellent 400 h capability at a depth of discharge (DOD) of 34% in Zn||Zn battery configurations, while in Zn||MnO2 battery assemblies, a capacity retention of 68.8% over 800 cycles is attained. Theoretical calculation reveals that the strong interactions between Mlz and (002) plane impeding its growth, while Zn atoms exhibit lower migration energy barrier and superior mobility on (100) and (110) crystal planes guaranteed the heightened mobility of zinc atoms on the (100) and (110) crystal planes, thus ensuring their superior ZIB performance than that with only ZSO electrolyte, which offers a route for designing next-generation high energy density ZIB devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jian Wang,Zheng Yang,Jinpeng Wang,Chaoyi Fan,Dandan Peng,Lizheng Jin,Furong Chen,Yang Xiang,Yang Su,Xue Yang,Yajun Pang,Hao Chen,Xin Zheng,Zhehong Shen,Sai Wu
Traditional inorganic anti-mildew materials exhibit limited anti-mildew efficacy when applied to bamboo, while organic anti-mildew reagents face issues of low loading and easy leaching. To address these challenges, this study explored the use of a two-dimensional leaf-shaped zeolitic imidazolate framework (ZIF-L), formed by the coordination of 2-methylimidazole with Zn 2+ , as an anti-fungi additive in polyurethane (PU) coatings. The objective was to enhance the anti-mildew properties of bamboo and its products in outdoor environments. Analysis of the mechanical properties reveals that the dynamic mechanical performance of the modified PU coating is significantly improved compared to that of pure PU coatings. The anti-mildew tests further demonstrate that, compared to inorganic zinc oxide (ZnO) nanoparticles and small-molecule 2-methylimidazole, the ZIF-L structure exhibits a synergistic anti-mildew effect of Zn 2+ and the 2-methylimidazole ligand, resulting in superior mildew resistance. No fungal growth was observed over 28 days. Furthermore, the ZIF-L modified PU coating demonstrated excellent resistance to leaching in a simulated rainfall exposure experiment, with an extremely low leaching rate of anti-mildew agent in the PU coating. The anti-mildew test after the simulated rainfall exposure confirmed its anti-mildew effect remained durable and stable, with significantly lower area of mold infection. These results reveal that the metal–organic framework (MOF) structure effectively immobilizes 2-methylimidazole and Zn 2+ , providing synergistic mildew resistance. The interaction between ZIF-L and PU enhances the anti-leaching properties of the coating.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2019
·
IF 8.426
Wan Chen,Mengzijing Chen,Mingke Yang,Enbao Zou,Hai Li,Chongzhi Jia,Changyu Sun,Qinglan Ma,Guangjin Chen,Huibo Qin
Although a series of advanced technologies and materials, like ionic liquids and metal organic frameworks, is being developed for carbon capture, traditional techniques, like propylene carbonate (PC) washing, are still widely applied in industry because of their low material costs and ease of operation. Considering the low CO 2 solubility and selectivity in PC, we have tried to improve the PC washing process by adding 2-methylimidazole (mIm) to PC in the presence of ethylene glycol (EG) as cosolvent. A series of EG-mIm-PC complex solvents was prepared and their viscosities measured at different temperatures. The absorption isotherms of CO 2 in these complex absorbents, as well as in pure PC, were measured at 293.15, 303.15, and 313.15 K at 0.1–0.8 MPa. The heats of CO 2 absorption in these solvent mixtures were calculated using the Clausius-Clapeyron equation. For evaluating the effect of mIm on the selectivity of CO 2 over other gas species, the absorption isotherms of CH 4 , N 2 , and H 2 in pure PC and in 24%-mIm complex solvent with highest CO 2 solubility were also measured. The results showed that the viscosities of these complex absorbents, as well as the solubility and heats of absorption of CO 2 in all of them, moderately or slowly increased with an increase in mIm mass fraction, when the mIm content was lower than 20 wt%, and rapidly increased when it surpassed 20 wt%. The CO 2 solubility could be more than doubled when the mIm content reached 24 wt% while viscosity and absorption heat still remains at low levels, that is, lower than 14 mPa·s and 26 kJ/mol, respectively. More importantly, the solubilities of CH 4 , N 2 , and H 2 drastically decreased in the presence of mIm; using the 24 wt%-mIm complex absorbent instead of pure PC, the selectivity of CO 2 over those other gas species increased by: 0.7–2.8 times for CH 4 , 3.9–6.3 times for N 2 , and 3.5–7.7 times for H 2 , with more significant improvements at lower pressure ranges. This work presents a very promising approach to PC washing technology upgrading.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Linbo Zhang,Haoyu Gao,Peng Zhang,Xianyu Jiang,Yujie Zhao,Liangjun Yin,Zhou Deng,Hanxuan Zhang,Jianliang Xie,Li Zhang,Haipeng Lu,Longjiang Deng
Magnetic metal absorbers are susceptible to strong corrosion in acid, alkali and salt fog environments, resulting in strong limitations of their applications. Therefore, it is urgent to develop magnetic absorber with enhanced anti-corrosion and microwave absorption. In this paper, carbonyl iron powder (CIP) coated with 2-methylimidazole/epoxy (2-MI/EP) composites were prepared by in-situ polymerization. The CIP@2-MI/EP composites showed better microwave absorption performance with a minimum reflection loss (RL min ) value of −54.11 dB at 9.69 GHz with 2 mm thickness. The electrochemical test results show that the corrosion current density of the composites decreases by two orders of magnitude and the corrosion potential is positively shifted to −0.1. In addition, the presence of 2-MI/EP layer can enhance the oxidation resistance of this composite. Considering the corrosion resistance , electromagnetic properties and oxidation resistance of this composite material, it provides an opportunity for valuable addition at commercial level.
研究领域:
材料科学
·
腐蚀与防护
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yahui Xuan,Xiaofang Feng,Shuning Liu,Xiaobo Liu
The difficulty of recycling and the finite photocatalytic performance of primitive nano-photocatalysts restrict their application in wastewater purification. In this study, a multifunctional membrane with efficient synergistic adsorption and degradation performance was constructed. The nano-photocatalyst layered bimetallic oxide (LDO) was combined with the matrix membrane polyarylether nitrile (PEN) by delayed phase transition technology. The introduced 2-Methylimidazole (2-MeIm) provided a virtual electron transfer pathway between PEN and LDO and enhanced the photocatalytic performance. The results suggested that PEN/LDO/2-MeIm has outstanding removal performance to organic dyes methylene blue (MB). After three consecutive cycles, the reacted membrane can be readily recovered from the system. The MB removal rate remained high at 89.38%, suggesting that the functional membrane is eligible for recycling and reuse. Finally, based on liquid chromatography-mass spectrometry (LC-MS) analysis and density functional theory (DFT) calculations, the mechanism and pathway of MB photodegradation by the PEN/LDO/2-MeIm system were proposed. Therefore, constructing PEN/LDO/2-MeIm membranes in this study may offer a novel perspective on creating eco-friendly and functional PEN-based membranes for practical use in wastewater purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yidi Teng,Xiaoke Wei,Bingshu Wu,Yanmin Liu,Naixuan Fan,Yueyu Ma,Fengxiang Wang,Xiangyu Dou,Xifeng Yang,Weiwei Zhang
Developing eco-friendly coatings is crucial for protecting the surface of carbon steel , and particularly important is the development of chemically stable, durable, and highly stable superhydrophobic coatings which have become a growing trend. In this study, a hydrophobic nano-composite coating was synthesized, which consists of 2-methylimidazolezincsalt (ZIF-8) particles stabilized in cross-linked TEOS and coated with micro/nano-sized silica . Electrochemical experiments and surface analysis were conducted to evaluate the electrochemical behavior and interaction mechanism between ZIF-8 @SiO 2 /APTES/EP and Fe. The results showed that ZIF-8 @SiO 2 /APTES/EP has excellent inhibition performance in 3.5 wt% NaCl solution with inhibition efficiency up to 99.99%. Even after soaking for 72 h, the impedance modulus remains at 6 orders of magnitude, demonstrating excellent anti-corrosion performance. SEM and contact angle analysis demonstrated that a dense ZIF-8 @SiO 2 /APTES/EP film was formed on the mild steel surface, which has good corrosion resistance and chemical stability. This study is of great significance for guiding the design of high-performance hydrophobic coatings and meets the requirements of various industries for corrosion protection of mild steel surfaces.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Tingnan Xiao,Yating Wang,Yongshen Hao,Zidong Cai,Meiying Song,Jincan He,Zhengquan Su,Yan Bai
In weakly acidic BR buffer solution, a convenient and sensitive resonance Rayleigh scattering (RRS) method for the detection of Cu(Ⅱ) was developed based on the formation of salicylaloxime-Cu(Ⅱ) supramolecular complex by complexation reaction. The coordination reaction of salicylaldehyde oxime with Cu(Ⅱ) led to the significant enhancement of the resonance Rayleigh scattering intensity of the solution, and the increase of the resonance Rayleigh scattering intensity was proportional to the concentration of Cu (Ⅱ). When organic compounds with different molecular structures were introduced into the system, the resonant Rayleigh scattering intensity of the solution system changed differently. The interaction between the compounds and the spatial structure of the complexes were characterized by transmission electron microscopy (TEM), Fourier real-time infrared spectroscopy (FT-IR), zeta potential and particle size. The results showed that when 2-methylimidazole was introduced, the layered texture of Cu(Ⅱ)-CH 3 COO - -H 2 PO 4 - -salicylaldoxime system changed to porous reticular spatial structure, and the RRS value increased significantly. Under the optimal conditions, in the range extending from 0.08 to 2.81 µmol/L, the equation of linear regression was Δ I = 3202 c + 10.88 ( c , µmol/L) with a correlation coefficient 0.9996, and the detection limit was estimated to be 4.23 × 10 -2 µmol/L. The method was successfully applied for the determination of Cu(Ⅱ) in tap and river water sample, suggesting its great potential toward Cu(Ⅱ) analysis.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Chunyu Qiu,Fuxian Cai,Yuan Wang,Yijun Liu,Qingxiang Wang,Chuan Zhao
It is a highly desired yet challenging task to replace rare and expensive noble metal catalysts with inexpensive and earth-abundant metal ones in electrochemical sustainable chemistry field. Herein, the bimetallic zinc-cobalt layered double hydroxide nanosheets (ZnCo-LDH NS) have been facilely synthesized using 2-methylimidazole as a bifunctional alkali source (OH − ) and a morphological controlling reagent by the one-step room-temperature reaction. The mechanism study shows that the weak organic base of 2-methylimidazole-induced slow release of OH − in water/ethanol is the controlling factor for the formation of the LDH nanosheets. The ZnCo-LDH NS modified on glassy carbon electrode exhibited an overpotential of 385 mV at 10 mA cm −2 and a Tafel slope of 108 mV dec −1 in 1.0 M KOH for oxygen evolution reaction , outperforming the corresponding the monometal oxides of Zn-OH, Co-OH, the NaOH produced ZnCo-LDH microparticles , and even the benchmark catalyst of RuO 2 at high current density. Characterization experiments indicated that the outstanding electrocatalytic activity can be ascribed to the nanosheet-induced surface area effect, excellent electronic conductivity, and the coupling effect between Zn 2+ and Co 2+ in the material. This work offers a facile and environmental-friendly method for synthesising LDH nanosheets bearing enhanced oxygen evolution reaction activity.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yu-Qin Mao,Guang-He Dong,Yuan-Qing Li,Pei Huang,Shao-Yun Fu
Doping engineering is a high-efficiency strategy to introduce heteroatom species and modify the surface electronic structures of porous carbon materials. However, the conventional doping strategies for porous carbons usually involve with either complicated fabrication processes or difficulty in quality control. Herein, nitrogen‑oxygen self-doped porous carbons (NOPCs) with adjustable structure are prepared by a facile one-step process of direct carbonization/activation the mixture of 2-methylimidazole (2-MeIM) and KOH. The as-prepared NOPCs possess hierarchical porous structure with interconnected micro-/ meso -/macropores, high specific surface area (2900 m 2 g −1 ), large pore volume (1.2 cm 3 g −1 ) and high N,O heteroatoms level (26.8 at.% in total), which exhibit ultra-high specific capacitance of 424.2 F g −1 at 1.0 A g −1 in a three-electrode system in 2 M KOH electrolyte and 173.4 F g −1 at 1.0 A g −1 in a two-electrode system in EMIMBF 4 ionic liquid electrolyte. Impressively, the symmetric supercapacitor based on NOPC exhibits a wide operating voltage window up to 3 V, a high energy density of 56.4 Wh kg −1 at a power density of 373.6 W kg −1 , excellent rate performance with the retention of ~76.2 % from 1.0 to 100 A g −1 , and splendid cycling stability with only 0.0011 % capacity fading per cycle within 10,000 loops. Consequently, the one-step carbonization/activation strategy with commercial-available 2-MeIM as raw material is promising for mass production of high performance NOPC materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yu-Xuan Dai,Wen-Li Xin,Lian-Hua Xu,Ji Li,Yi-Xuan Li,Junji Li,Serge Cosnier,Xue-Ji Zhang,Robert S. Marks,Dan Shan
Rational design highly active transition metal or transition metal oxides/nanocarbon hybrids is one of the feasible way to deliver a cooperative oxygen reduction (ORR) with a synergistic effect of the hybrid interface. Herein, based on benzimidazole-5-carboxylate (BIMC), CoO/Co-N-C nanocomposites are fabricated via 2-methylimidazole (2-MeIm)-tuned “4-Self” strategy, namely, self-templating, self-adapting, self-assembly and self-catalysis. As a base competitive ligand with N and C sources, 2-MeIm modulates the dispersion of BIMC in methanol to generate collodial-like BIMC tiny particles, the coordination ability of BIMC to Co(II), the composition and morphology of the self-assembled precursor (Co-BM), and as well as the conductivity of the resultant electrocatalyst. Impressing, carbonization of Co-BM at 800 °C under N 2 atmosphere endows the pyrolysis product (Co-BM-800) with the well-dispersed Co/CoO riveted on nitrogen-doped carbon, as well as the enhanced ORR performance in terms of positive onset-potential (0.890 V vs. RHE), large diffusion limiting current density (5.21 mA cm −2 ), and high stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）