Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Hanlin Shao,Xiaoshuang Yin,Kegui Zhang,Wenzhong Yang,Yun Chen,Ying Liu
In this work, N-[2-(3-indolyl)ethyl]-cinnamamide (IA) synthesized from tryptamine (TA) and cinnamic acid was evaluated as green corrosion inhibitor for Q235 steel in 0.5 M HCl solution by weight loss tests, potentiodynamic polarization (PDP) curve and electrochemical impedance spectroscopy (EIS). Gravimetric measurements displayed the maximum inhibition efficiencies of TA and IA at 1.0 mM were up to 92.8% and 97.6%, respectively. PDP and EIS studies revealed they could hinder both hydrogen evolution and metal dissolution reactions and that the inhibiting effect was temperature and concentration dependent. The surface analysis of sample was presented through scanning electron microscope (SEM), energy dispersive spectroscopy (EDX) and atomic force microscope (AFM), which indicated the anti-corrosion ability of Q235 steel in hydrochloric acid was enhanced by the inhibitor. The adsorptive behavior of inhibitors including physisorption and chemisorption obeyed Langmuir isotherm. The inhibition mechanism was elucidated by determining the potential of zero charge ( E pzc ) at solid/liquid interface. Quantum chemistry calculation provided a theoretical estimate of the reactivities of TA and IA as corrosion inhibitors to ascertain the correlation between the inhibition efficiency and molecular structures. Results of molecular dynamics (MD) simulations confirm that IA shows better inhibitive performance due to higher interaction energy (– 79.1 kJ mol −1 for TA and – 144.16 kJ mol −1 for IA).
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 9
·3905-3913
·
IF 1.754
Guo Zong,Chu Taiwei
In this work, a separation and purification process of U(VI), Zr(IV) and I 2 from various fission products in nitric acid solution by 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C 4 mim][NTf 2 ]) and dibutyl-3-(3-methylimidazolium)propylphosphoramide bis(trifluoromethanesulfonyl)imide-task specific ionic liquid (phosphoramide-TSIL) was investigated. The phosphoramide-TSIL was found to reduce ligand loss compared to dibutyl propylphosphoramidate by total organic carbon testing (TOC). The stripping of U(VI), Zr(IV) and I 2 could be achieved by guanidine carbonate solution, oxalic acid solution and sodium hydroxide solution, respectively. The phosphoramide-TSIL/[C 4 mim][NTf 2 ] showed good irradiation stability and recyclability. Phosphoramide-TSIL has the potential to be applied for separation and purification in the actual radioactive environment. Graphical abstract
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FUEL
·
2022
·
IF 8.035
Miao Zuo,Xinyu Wang,Wenlong Jia,Yanzhong Zhu,Xianhai Zeng,Lu Lin
As one of the essential building blocks for bio-chemicals and bio-fuels, the 5-Hydroxymethylfurfural (HMF) production is still challenging in a green and cheap way. This work developed a bio-derived aqueous-natural deep eutectic solvent (A-NADES) to synthesize HMF using α-Al 2 O 3 or Al(OH) 3 as robust catalysts, obtaining high yields of 67.1% and 63.6% HMF from glucose under mild reaction reactions, respectively. Different kinds of starches and starchy food waste also exhibited high conversion efficiency in the A-NADES system. The mechanistic study indicated that the in-situ formed Al (III) site of α-Al 2 O 3 during the reaction was critical for converting glucose-based carbohydrates. A-NADES could be effectively reused six times with a more convenient direct reuse method without significant activity loss. This study suggested a novel A-NADES reaction media in the synergistic reaction with robust aluminum-based catalysts for HMF synthesis, and proposed a novel process of food waste utilization in green solvents.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Lijian Shi,Yaping Zhang,Yujia Tong,Wenlong Ding,Weixing Li
Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology. Recently, plant-/mussel-inspired interface chemistry has received more and more attention. Herein, a high antifouling poly (vinylidene fluoride) (PVDF) membrane, coated with tea polyphenols (TP, extracted from green tea) and 3-amino-propyl-triethoxysilane (APTES), was developed to purify oil-in-water emulsions. ATR-FTIR, XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid coatings. The performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water emulsions. The experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability (14570 L·m −2 ·h −1 ·bar −1 , 1 bar=0.1 MPa) and isooctane-in-water emulsion permeability (5391 L·m −2 ·h −1 ·bar −1 ) with high separation efficiency (>98.9%). Even treated in harsh environment (acidic, alkaline and saline) for seven days, the membrane still maintained considerable underwater oleophobic property (148°–153°). The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 20
·12550-12562
·
IF 3.945
Xue Fu,Xiaochen Tang,Tingting Chen,Yingjie Xu,Xiang Luo,Yueqing Lu,Xuming Wang,Dandan Qin,Lin Zhang
The interactions between azole-anion-based ionic liquids (AILs) and 2-methyl-3-butyn-2-ol (MBY) play an important role in AIL-promoted carboxylative cyclization of MBY with CO2. To better understand the interactions between AILs ([P66614][Im], [P66614][4-MeIm], and [P66614][4-BrIm]) and MBY, a detailed investigation from the experimental perspective has been carried out in this study. The results show that the derivative of viscosity (η) with the mole fraction of AIL (xAIL) of AIL + MBY mixtures appears to have the maximum value when xAIL ≈ 0.3, while 1H NMR chemical shifts of P-CH2 of [P66614]+ reach the minimum value at xAIL ≈ 0.3, indicating that [P66614]+ of AILs tend to self-aggregate. The interaction parameters (gji–gii) of the systems obtained from η by the Eyring-UNIQUAC equation are positive, and the difference between the bulk and local composition (xi–xii) is always negative, indicating that AILs can interact with MBY. Moreover, excess molar volumes and isentropic compressibility deviations are all negative deviations and become more negative as the temperature increases, reaching a minimum value at xAIL ≈ 0.30, indicating that azole-based anions can form H-bonds with MBY, and MBY molecules tend to enter the aggregates formed by AILs. Consequently, the cage effect is proposed to describe the interactions between AILs and MBY: MBY first enters the cage formed by the aggregation of [P66614]+, and then forms H-bonds with azole-based anions. Finally, the sizes of the particles of the [P66614][Im] + MBY mixture from dynamic light scattering increase first and then decrease with xAIL, with the maximum of 122 nm at xAIL ≈ 0.25, which confirms the rationality of the cage effect.
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PubMed
高影响因子
SENSORS
·
2022
·Vol. 22
·期 6
·2222
·
IF 3.847
Mengxue Li,Yiwen Kuang,Ziyan Fan,Xiaoli Qin,Shiyu Hu,Zhanning Liang,Qilin Liu,Weizhong Zhang,Birui Wang,Zhaohong Su
Sensitive simultaneous electrochemical sensing of phytohormones indole-3-acetic acid and salicylic acid based on a novel poly(L-Proline) nanoparticles–carbon dots composite consisting of multiwalled carbon nanotubes was reported in this study. The poly(L-Proline) nanoparticles–carbon dots composite was facilely prepared by the hydrothermal method, and L-Proline was used as a monomer and carbon source for the preparation of poly(L-Proline) nanoparticles and carbon dots, respectively. Then, the poly(L-Proline) nanoparticles–carbon dots–multiwalled carbon nanotubes composite was prepared by ultrasonic mixing of poly(L-Proline) nanoparticles–carbon dots composite dispersion and multiwalled carbon nanotubes. Scanning electron microscope, transmission electron microscope, Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy, energy dispersive spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry were used to characterize the properties of the composite. poly(L-Proline) nanoparticles were found to significantly enhance the conductivity and sensing performance of the composite. Under optimal conditions, the composite-modified electrode exhibited a wide linear range from 0.05 to 25 μM for indole-3-acetic acid and from 0.2 to 60 μM for salicylic acid with detection limits of 0.007 μM and 0.1 μM (S/N= 3), respectively. In addition, the proposed sensor was also applied to simultaneously test indole-3-acetic acid and salicylic acid in real leaf samples with satisfactory recovery.Keywords:poly(L-Proline) nanoparticles;carbon dots;multiwalled carbon nanotubes;indole-3-acetic acid;salicylic acid;simultaneous detection
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yuanyuan Chen,Jingting Wang,Zhenan Rao,Junfeng Hu,Qiming Wang,Yueru Sun,Xiaojuan Lei,Jichun Zhao,Kaifang Zeng,Zhigang Xu,Jian Ming
The biological activity and absorption of curcumin (Cur) is limited in application due to its low water solubility, poor stability and rapid metabolism. In this work, Cur loaded (-)-epigallocatechin-3-gallate (EGCG)/poly( N -vinylpyrrolidone) (PVP) nanoparticles (CEP-NPs) was successfully fabricated via self-assembly driven by hydrogen bonding , providing with desirable Cur-loading efficiency, high stability, strong antioxidant capacity , and pH-triggered intestinal targeted release properties. Molecular dynamics simulations further indicated the Cur was coated with EGCG and PVP in CEP-NPs and high acid prolonged release property was attribute to low ionization degree of EGCG. Besides, the enhanced intestinal absorption of Cur was related to inhibition of Cur metabolism by EGCG, enhancement of cellular uptake and higher Caco-2 monolayer permeation. Pharmacokinetic study showed that the oral bioavailability presented nearly 12-fold increment. Therefore, this study provides a new horizon for improving the Cur utilization in food and pharmaceutical fields.
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高影响因子
BIOMEDICAL CHROMATOGRAPHY
·
2023
·Vol. 37
·期 9
·e5668
·
IF 1.8
Linjie Li,Jingxuan Tan,Yujing Du,Xixuan Li,Yongning Lv,Xuejia Zhai
A sensitive and specific high-performance liquid chromatography–tandem mass spectrometry method has been developed to determine the pharmacokinetic interactions of the antiplatelet agents aspirin and clopidogrel combined with dl -3 -n- butylphthalide. For the determination of aspirin metabolite salicylic acid, clopidogrel inactive metabolite SR26334 and NBP prototype drug in rat plasma, plasma samples were prepared by precipitation of proteins using methanol containing 0.1% formic acid, followed by centrifugation. Chromatography was performed on a C 18 column, eluting with a gradient of acetonitrile (with 0.1% formic acid)–water (with 0.1% formic acid). The detection adopted electrospray ion source and positive ion multiple reaction monitoring modes. The linear detection response range of salicylic acid is 80–80,000 ng/ml, and the linear detection response range of SR26334 and dl -3 -n- butylphthalide is 10–10,000 ng/ml. Our study revealed that dl -3 -n- butylphthalide affected the pharmacokinetics of aspirin and clopidogrel when administered to rats.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shahid Hussain,Haifeng Dong,Yanqiang Zhang,Guoxiong Zhan,Shaojuan Zeng,Huifang Duan,Xiangping Zhang
The efficient capture of carbon dioxide (CO2) has industrial, economic, and environmental significance. Here, CO2 capture performance in terms of CO2/CH4 selectivity for the zeolitic imidazolate framework (ZIF-8) is enhanced by impregnation of 1-n-butyl-3-methylimidazolium dicyanide [BMIM][DCA]. The preparation of ionic liquids (ILs)/ZIF-8 composites, their comprehensive characterization, and the impact of IL impregnation are all investigated. The crystal structure and morphology of ZIF-8 remained intact even after the impregnation of ILs, according to X-ray diffraction and scanning electron microscopy studies. The infrared spectroscopy known as Fourier transform infrared spectroscopy determines the interaction between ILs and ZIF-8 in the composite. The isotherm fitting was also performed by dual site Langmuir models, which showed good agreement with the experimental results. The CO2/CH4 selectivity results demonstrated that the ideal selectivity for the IL-impregnated ZIF-8 composite has five times higher selectivity than pristine ZIF-8 at 0.05 bar which is the highest reported selectivity. The normalized selectivity of this type of IL/ZIF-8 composite is also higher. This study suggested that the IL/MOF composite with a tunable structure have a strong potential for enhanced acid gas separation performance to meet the environmental challenges.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Xiaoli Song,Yang Lu,Yongling Lu,Lishuang Lv
Acrolein (ACR) derives from the external environment and the endogenous metabolism of organisms. It has super-reactivity and can induce various diseases. We investigated the capacity of cyanidin-3-O-glucoside (C3G) and its degradants/metabolites to capture ACR during thermal processing or in vivo. Our results indicated that both C3G and its degradants, including phloroglucinaldehyde (PGA) and protocatechuic acid (PCA), could efficiently trap ACR to form adducts, such as C3G–ACR, C3G–2ACR, PGA–ACR, PGA–2ACR, PCA–ACR, and PCA–2ACR. Additionally, these adducts were detected in commercial canned red bayberry products. The adducts of C3G and its metabolites conjugated with ACR, such as C3G–ACR, C3G–2ACR, PGA–ACR, and 4-hydroxybenzoic-acid–ACR (4-HBA–ACR), were also detected in mice feces treated with C3G by oral gavage, where the adduct level was dose-dependent. A similar pattern was observed in tests on human consumption of red bayberry. In human urine, only PGA–2ACR and 4-HBA–ACR, were found, whereas C3G–ACR, C3G–2ACR, myricetin-3-O-rhamnoside–ACR (M3R–ACR), PGA–2ACR, 4-HBA–ACR and ferulic acid–ACR (FA–ACR) were detected in human feces following administration of red bayberry. Our results are the first demonstration that C3G and its metabolites can capture ACR in vitro and in vivo (mice and humans) and present a novel strategy, the development of C3G as a promising ACR inhibitor.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 24
·8061
·
IF 4.6
Jiaying Lv,Ruimao Hua
A two-step, one-pot synthesis of 3-substituted 1H-dibenzo[e,g]indazoles in good to high yields via a LiOtBu-promoted intramolecular 1,3-dipolar cyclization of 2′-alkynyl-biaryl-2-aldehydeN-tosylhydrazones was developed. TheN-Ts-hydrazones used were prepared in situ via the reactions of 2′-alkynyl-biaryl-2-aldehydes and TsNHNH2(p-methylbenzenesulfonohydrazide). Two types of signals related to the hydrogen bonds, forming in several products, were observed in the1H NMR spectra recorded in DMSO-d6, assigned to N-H bonds in their dimeric species of product and tautomer.Keywords:N-tosylhydrazones;1H-dibenzo[e,g]indazoles;intramolecular cycloaddition;lithiumtert-butoxide;hydrogen bonds
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 9
·6612-6624
·
IF 1.569
Wang Jingchao,Wang Linlin,Gao Jun,Zhou Ling,Ge Yunlong,Jing Liqiang,Shi Keying,Li Li
The 3D flower-like mesoporous hierarchical architecture materials were fabricated via a facile one-pot reflux method. The composites were carefully characterized by XRD, SEM, BET, XPS, EIS and MS plot measurements. The results indicated that the morphology of the obtained products could be controlled by adjusting the reaction time, and the sample with the mass ratio of 30 % In(NO 3 ) 2 ·6H 2 O/Ni(NO 3 ) 2 ·6H 2 O (labeled as NIDH-30) formed 3D flower-like mesoporous hierarchical architecture, which was composed of nanopetals with porous thin nanosheets and the size of In(OH) 3 nanoparticles around 8–13 nm. As a result, NIDH-30 exhibited excellent sensing properties at ultra low detection limit of 9.7 ppb for detection of NO x . The response toward 97 ppm NO x could reach to 60 % and the response time was 1.2 s. Moreover, it showed a great selectivity and stability at room temperature. The excellent gas sensing performance could be ascribed to higher surface area and space-charge layer which induce the highly effective surface interaction between the target gas molecules and the surface active sites. Synergetic effect and electronic effect also favoring the effective adsorption of NO x on the surface. All the factors were obviously beneficial for the mesoporous hierarchical Ni(OH) 2 –In(OH) 3 double hydroxide composites as gas sensor for monitoring air pollution.
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危险品化学品经营许可证（带存储）