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 CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Lixia Yang,Yuexia Han,Zhen Jiao
To obtain the basic data for the recovery of 1-methylimidazole from wastewater by extraction, the ternary liquid–liquid phase equilibrium data of the water (1) + 1-methylimidazole (2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) (3) system were determined using an equilibrium autoclave at the temperatures of 303.15 to 323.15 K and 101.32 kPa. The solute distribution coefficient (D) and the selectivity (S) of the ternary system were calculated in accordance with the experimental data. Their values were up to 1.39 and 41.17, respectively, which showed that the ionic liquid can extract 1-methylimidazole effectively. The experimental results showed that the temperature had a slight effect on the liquid–liquid equilibrium behavior. Meanwhile, the calculated results revealed that the selectivity coefficient decreased with the enhancing concentration of 1-methylimidazole in the ternary system and the increasing temperature. In addition, the nonrandom two liquid (NRTL) model was used for correlation of the ternary systems. The root-mean-square deviation value of 0.0218 indicated that the calculated results using the model were in good agreement with the experimental data and were reliable to apply to practice.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
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
DESALINATION
·
2023
·
IF 9.9
Yingying Liu,Xinyu Dong,Ming Wang,Shujie Guo,Haifeng Zhang,Zhi Wang
Nanofiltration (NF) membrane technology has become the most critical alternative to resolve fresh water resources shortage and water pollution . Preparing polyamide (PA) NF membrane with excellent water permeance and mono/multivalent salts selectivity is highly desired. Herein, we introduced 1-methylimidazole (1-MI) as a reactive additive into interfacial polymerization (IP) to prepare NF membrane and attempted to improve the NF membrane performance . 1-MI modified NF membranes exhibited enlarged pore size and thickness of PA layer, as well as a smooth and hydrophilic membrane surface , the water permeance improved from 7.7 L/(m 2 ·h·bar) of Virgin-NF to 13.1 L/(m 2 ·h·bar) of 1-MI-0.05-NF. The Na 2 SO 4 rejection was maintained at 95.01% while NaCl rejection dramatically reduced from 25.79% to 13.29%, and the Cl − /SO 4 2− selectivity slightly increased from 21.47 to 23 under the mixed salts solution as feed. The enhancement of water permeance was ascribed to the looser PA layer and enhanced hydrophilicity . The retaining Na 2 SO 4 rejection was attributed to electrostatic repulsion caused by more carboxylic acid groups, and the decreased NaCl rejection was ascribed to the looser PA layer. Besides, the modified membrane had an acceptable pH stability. In summary, 1-MI modified NF membrane was suitable for the separation of monovalent/divalent anionic salts.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yunlian Yang,Wei Zhong,Ruonan Ma,Chunxin Lu,Zhongquan Shen,Xiaoming Liu,Shuhua Zhang,Hongming Wang
The surface organometallic chemistry or surface coordination is considered as an important tool for modifying the surface properties and electronic structure of metal centres to achieve enhancement in catalysis. In this piece of work, we report how cuprous oxide (Cu 2 O) was turned into an efficient catalyst alongside with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and N-methylimidazole (NMI) for catalytic aerobic oxidation of benzylic alcohols into aldehydes under ambient conditions through surface coordination. The coordination not only enhanced the capability of O 2 -activation via the ligation of NMI to the metal sites, but also the surface structure was engineered in such a way that a vacancy was created for O 2 -binding, one of the key steps as revealed by DFT calculations. Both experimental and theoretical results suggested that the coordination to the metal sites at the surface by NMI activated cuprous oxide via breaking up its oxo bridge at the surface to form hydroxyl group to allow O 2 -binding, and increased also the electron density on the metal site to enhance its capability of O 2 activation. A plausible mechanism was proposed by using a variety of spectroscopic and electrochemical techniques as well as DFT calculations.
研究领域:
化学
·
催化科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Zhen Jiao,Mengnan Zhang,Lixia Yang,Yuxuan Wang,Jiajie Fu
To evaluate the feasibility of extraction of 1-methylimidazole from its low-concentration aqueous solution by ionic liquids, the liquid–liquid equilibrium of the ternary system of water + 1-methylimidazole + ionic liquid ([Hmim][PF6], [Omim][PF6], or [Omim][BF4]) was determined at 303.15 K and atmospheric pressure. The distribution coefficient and selectivity were calculated in accordance with the experimental results. The effects of the anion and cation of ionic liquids on the separation ability were discussed. The results indicated that the extraction capacity increased with increasing cationic carbon chain length, and the change of anions significantly affected the distribution coefficient and selectivity. As expected, the three ionic liquids were feasible as extractants for separating 1-methylimidazole from water. It also indicated that [Omim][PF6] was a more suitable extractant than [Hmim][PF6] and [Omim][BF4] for the extraction. The highest distribution coefficient and selectivity of [Omim][PF6] could reach 1.71 and 111.92, respectively, indicating [Omim][PF6] as a good choice for extracting 1-methylimidazole from water. In addition, the non-random two-liquid model was employed to successfully correlate the experimental data with a root-mean-square deviation of less than 0.0188. Moreover, a GUI-MATLAB tool was used to verify the consistency of the correlated parameters.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 8
·1705-1712
·
IF 7
Jie Guan,Dandan Yang,Junyi Ma,Yingzhuo Shen,Qin Xu,Xiaoya Hu
The extension application of perovskites in aqueous media such as bioassays requires the development of a water-stable perovskite with a simple preparation process and low cost. However, the degradation of perovskites in aqueous solution is still a thorny problem. Here, we develop a methylimidazole-assisted two-step synthesis protocol to prepare CsPbBr3@PbBrOH nanorods with superior water stability and remarkable optical properties at room temperature. The synergy of 2-methylimidazole (2-MIM), an N-donor ligand, with water can not only facilitate CsPbBr3 formation and suppress CsPb2Br5 or Cs4PbBr6 formation, but also promote the formation of a PbBrOH shell capping CsPbBr3. 2-MIM is ionized into 2-MIM− in DMF and 2-MIM+ in water. They passivated the surface defects and changed the crystallization environment, leading to water-stable CsPbBr3@PbBrOH. The obtained CsPbBr3@PbBrOH nanorods can still maintain 91% PL intensity after being stored in water for more than 2 months. Furthermore, the CsPbBr3@PbBrOH nanorods show excellent stability in polar solvents, water, and phosphate buffer solution in a wide pH range, as well as better thermal and irradiation stability. In addition, the CsPbBr3@PbBrOH nanorods are further functionalized with polydopamine (PDA) for biomolecular immobilization and immunoassay studies. The resulting assay shows a detection limit of 0.003 ng mL−1 for IgG detection, illustrating important progress towards expanding fluorescence labeling application of perovskite nanomaterials for immunoassays.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
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
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Congrong Yang,Suli Wang,Wenjia Ma,Luhua Jiang,Gongquan Sun
The alkaline stability of 1,2-dimethylimidazolium with various N3-substituents (including butyl, benzyl and vinylbenzyl) and corresponding quaternary ammonium small molecular compounds, and the 1,2-dimethylimidazolium- and quaternary ammonium-based membranes are systemically studied in the same condition. The spectroscopy (such as NMR, FT-IR, XPS and mass spectrum) results of the two kinds of small molecular compounds indicate that the quaternary ammonium cations are more stable than 1,2-dimethylimidazolium cations in 3 M KOH at elevated temperature, especially at 80 °C. Moreover, the alkaline stability of the 1,2-dimethylimidazolium cations would be influenced by the N3-substitutions of the imidazolium, and N3-butyl substituted cation shows a better alkaline stability. The quaternary ammonium-based membrane are also more stable than the 1,2-dimethylimidazolium-based membrane in 1 M KOH at 60 °C. In addition, the performance of the alkaline direct methanol fuel cell using quaternary ammonium-based membrane (22 mW cm −2 ) is much better than that of the fuel cell using 1,2-dimethylimidazolium-based membrane (0.04 mW cm −2 ).
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
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Fufeng Cai,Wei Zhu,Yanbin Wang,Tongzhen Wang,Guomin Xiao
In this work, the ability of ionic liquids (ILs) 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]), 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]), and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][DBP]) as alternative solvents used in liquid removal of toluene from its combination with heptane was studied. The liquid–liquid equilibrium (LLE) data in relation to ternary systems {toluene + heptane + [MMIM][DMP], [EMIM][DEP], or [BMIM][DBP]} calibrated at T = 298.2 K and atmospheric pressure. The LLE results studied in relation to ternary systems were fitted by the thermodynamic nonrandom two-liquid (NRTL) model. The toluene solute distribution ratios and toluene/heptane selectivities, derived from the experimental LLE data, were compiled and analyzed to determine the extraction capacity of the studied ILs.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Yingying Liu,Wentao Yan,Zhi Wang,Huihui Wang,Song Zhao,Jixiao Wang,Peng Zhang,Xingzhong Cao
A novel aqueous solution additive, 1-methylimidazole (1-MI), was applied to prepare aromatic polyamide (PA) reverse osmosis (RO) membranes with excellent performance by interfacial polymerization of trimesoyl chloride (TMC) and m-phenylenediamine. The RO membrane structure and performance were characterized in detail. The results indicated that the addition of 1-MI was beneficial to forming the membrane with a dense and thin PA layer. This is because 1-MI could react with TMC, which is in favor of the formation of back surface structure with more pores. The product generated by 1-MI and TMC was hydrolyzed easily, and then endowed the membrane with more carboxylic acid groups. The membrane desalination performance for feeds with different NaCl concentration was evaluated. The membrane prepared with 1-MI possessed a higher flux and rejection because of the thinner and denser PA layer and more carboxylic acid groups. Considering that the membranes inevitably face chemical cleaning with acid or alkaline solutions in the real processes, the RO membranes were exposed to acidic-alkaline solution, and the results showed that the membrane prepared with 1-MI had good pH stability. This study offers a new route for preparing an excellent-performance RO membrane via using 1-MI as an additive.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
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
危险品化学品经营许可证（带存储）