JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yichang Ma,Jianxian Zeng,Yajie Zeng,Hu Zhou,Guoqing Liu,Yuan Liu,Lingwei Zeng,Jian Jian,Zhengqiu Yuan
In order to separate palladium (II) from electroplating wastewaters, poly(4-vinylpyridine)-b-polysulfone-b-poly(4-vinylpyridine) (P4VP-PSF-P4VP) / polysulfone blend membranes were fabricated by combining non-solvent induced phase separation, surface segregation and self-assembly of block copolymer . Amphiphilic P4VP-PSF-P4VP was used as the membrane base material, which was synthesized by introducing the functional monomer of 4-vinylpyridine (4-VP), and polysulfone as the additive. Effects of blend ratio and 4-VP content on membrane performance, such as structure, hydrophilicity, pure water flux and adsorption capacity towards Pd (II), were investigated. The membranes exhibited dense surface structure and low roughness due to surface segregation and self-assembly of P4VP-PSF-P4VP. The presence of 4-VP increased hydrophilicity and water flux of membrane, and it also provided good adsorption capacity towards Pd (II) (up to 103.1 ± 5.15 mg/g). Further, the membrane was used to separate Pd (II) from simulated wastewaters during filtration. It showed good rejection ability and high selectivity towards Pd (II) in co-existence of Cu (II) and Ni (II), and selectivity coefficients of Pd/Cu and Pd/Ni are 41.9 ± 1.88 and 97.8 ± 4.32, respectively. In filtration process of actual electroplating wastewater, the membrane also exhibited excellent rejection performance (Pd (II) rejection reached up to 96.8 ± 2.71%). Perhaps it is suitable for future practice applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 6
·3470-3475
·
IF 3.361
Ye Meng,Weiwei Zhao,Jun Zheng,Daofa Jiang,Jie Gao,Yanmei Jin,Peihua Ma
Since the first reportal on decamethylcucurbit[5]uril (Me10Q[5]) in 1992, substituted cucurbit[n]urils have attracted considerable research interest. In this study, the host–guest modes between the tetramethyl cucurbit[6]uril (TMeQ[6]) as a host and 4-chloroaniline and 4,4′-diaminostilbene (G1 and G2) as guests were investigated by single-crystal X-ray diffraction, NMR, ITC, UV-Vis spectrum, and MALDI-TOF mass spectrometry analyses. The experimental results showed that TMeQ[6] formed a 1 : 1 inclusion compound with G1, and the carbonyl portal of TMeQ[6] formed a 1 : 1 self-assembly with G2. Further, multi-dimensional supramolecular frameworks were formed driven by weak interaction forces in the system (hydrogen bonding, C–H⋯π interactions, ion–dipole interactions, and dipole–dipole interactions).
研究领域:
化学
·
超分子化学
·
结构化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 16
·7585-7597
·
IF 2.302
Zhong Hanyi,Qiu Zhengsong,Tang Zhichuan,Zhang Xin,Xu Jiangen,Huang Weian
In order to develop high-performance water-based drilling fluid with the aim of meeting the increasing requirement of drilling industry, highly inhibitive and high-temperature-resistant shale inhibitors are essential. In this study, 4, 4′-methylenebis-cyclohexanamine was introduced as a potential shale inhibitor. The inhibitive properties of the amine compound in comparison with currently available polyether diamine inhibitor were evaluated using bentonite inhibition test, shale cuttings hot-rolling dispersion test, linear swelling test, and pressure transmission test. The inhibitive mechanism was investigated with zeta potential measurement, X-ray diffraction analysis, and contact angle measurement. The results indicated that 4, 4′-methylenebis-cyclohexanamine can inhibit shale hydration and dispersion effectively, and prevent pressure transmission to a certain extent, performing better than that of polyether diamine. Furthermore, the new diamine provides reliable thermal stability as high as 220 °C, preserving the benefits of high-temperature wells application. This novel diamine inhibits shale hydration and dispersion with the combination of chemical inhibition and physical plugging. The intercalation into the interlayer of clay with monolayer collapses the hydrated clay structure and expels the water molecules. After adsorption, clay surface became more hydrophobic, which prevents the imbibition of water. The variation of solubility separates the compound from the solution, which can plug the micro-pores of shale and prevent fluid invasion.
研究领域:
石油工程
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
SYNTHETIC COMMUNICATIONS
·
2023
·
IF 2.1
Jun Yang,Guang-Ping Liang,Xiong-Li Liu
To investigate the effects and mechanisms of 4-(1H-indol-1-yl)-4-oxobutanoic acid spliced podophyllotoxin derivatives (3a–3l) on tumor cells. The MTT method was adopted to evaluate (3a–3l) antitumor activity in vitro against A549 cells, A549/DDP cells, MCF-7 cells. The results showed that compound 3l had the most prominent inhibitory effect and high selectivity with IC50 18.53 ± 1.51 µM against A549/DDP cells. Meanwhile, the effects of compound 3l on the nuclear state, cell cycle and apoptosis of A549/DDP cells showed that compound 3l induced apoptosis by delaying the G2/M phase of A549/DDP cell cycle. In addition, molecular docking of compound 3l also showed that it could form a good hydrogen bond with ARG-158 (d = 2.6, 2.7 Å) and HIS-406 (d = 2.5 Å) at the colchicine site of tubulin. Compound 3l could provide lead compound for the development of new multi-drug resistant anti-tumor drugs.
研究领域:
药理学
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肿瘤学
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化学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2025
·Vol. 13
·期 1
·232
·
IF 2.8
Jiulong Che,Jian Zhang,Qing Lang,Jiayuan Yu,Yixiao Yang,Longqi Luo,Zhiyi Liu,Jiahui Ye,Gang Wang
Dual-ion batteries (DIBs) were demonstrated as a promising technology for large-scale energy storage due to their low cost, recyclability, and impressively fast charge capability. Graphite as a commonly used cathode material in DIBs, however, suffers from poor compatibility with commercial Li-ion electrolytes and graphite anodes, making it difficult to directly utilize the well-established infrastructure for Li-ion batteries. Herein, we report a small aromatic amine molecule 4,4′,4″-tris(diphenylamino)triphenylamine (N4) functioning as a compatible anion host in the EC-containing Li-ion electrolyte. With an average discharge voltage of 3.6 V (vs. Li+/Li), the N4 electrode delivers a reversible specific capacity of 108 mAh/g, which is much higher than 29 mAh/g for the graphite cathode at the same condition. The high capacity retention of 91.3% was achieved after 500 cycles at 1 A/g. The N4 electrode also exhibited good rate performance. Via different characterization techniques like Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, the energy storage mechanism of N4 was revealed as a conversion between amine and quaternary amine cations, accompanied by PF6−(de-)insertion. As consequences, the assembled N4||graphite DIB w showed a high discharge capacity of 90 mAh/g within 1.5–4.1 V, and good cycling stability with a 98% capacity retention after 40 cycles. Decent rate performance was achieved in the N4||graphite DIB as well. This work provides new insights into designing a compatible anion host for affordable DIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 124
·期 1
·109-115
·
IF 1.24
Jikui Wang,Guofeng Cai,Xudong Zhu,Xiaping Zhou
The oxidative chemical polymerization of 3, 4-ethylenedioxythiophene (EDOT) was conducted at room temperature in the presence of poly(styrene sulfonate) (PSS) as the doping agent, sodium supersulphate (Na 2 S 2 O 8 ) and ferric sulphate(Fe 2 (SO 4 ) 3 ) as the compound oxidant and deionized water as the solvent. In order to remove sodium ion (Na + ), ferric ion (Fe 3+ ), and sulfate ion (SO4 2− ), certain amount of ion exchanger was added after 24 h, the dark blue poly(3, 4-ethylenedioxythiophene) (PEDT)/PSS solution was obtained. The influence of different proportions of EDOT and PSS, different proportions of EDOT and the compound oxidant, different stirring rates on the morphology, and surface resistivity were discussed. The influence of pH value of the PEDT/PSS solution, the coating thickness, and soak time on the surface resistivity was investigated. Recipe and experimental conditions were optimized and the PEDT/PSS solution was obtained with excellent performance which has relatively low in surface resistance, good water tolerance, and light transmittance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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
CHEMISTRY OF NATURAL COMPOUNDS
·
2017
·Vol. 53
·期 5
·860-865
·
IF 0.46
Li Na,Wang Bing,Sun Jing-yong,Wang Xiao-jing,Sun Jie
Twelve 4-aryl-3,4-dihydrocoumarins were synthesized by the condensation of phenols with the corresponding substituted cinnamic acids in the presence of nitrobenzene and sulfated montmorillonite K-10. This method displayed the property of green chemistry with respect of reuse of the catalyst. These compounds were evaluated for hydroxyl radical scavenging activity in vitro. Results showed that compounds with 7,8-dihydroxy groups had relatively strong hydroxyl radical scavenging activity.
研究领域:
有机化学
·
药物化学
·
自由基生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2014
·
IF 2.637
Cunling Ye,Xueyuan Wang,Heping Wang,Zhike Wang
Three 4-methylimidazolium-modified silica adsorbents with different counter anions such as BF 4 − , PF 6 − and Tf 2 N − (named as SilprM 4 ImBF 4 , SilprM 4 ImPF 6 and SilprM 4 ImTf 2 N, respectively) were prepared and characterized. Three types of adsorbents were used to remove 2,4-dinitrophenol (2,4-DNP) from aqueous solutions under static and dynamic conditions. It was found that the adsorption capacity of 2,4-DNP increases according to the order: SilprM 4 ImTf 2 N < SilprM 4 ImPF 6 < SilprM 4 ImBF 4 , which was opposite to the van der Waals volume of these counter anions and consistent with the hydrophilicity of these counter anions. The reason could be related that counter anions with large van der Waals volume would have large space steric hindrance and be unfavorable for the anion exchange reaction. Counter anions with good hydrophilicity would dissociate from these materials easily and the anion exchange reaction could easily take place. Under dynamic conditions, the geometry shape of counter anions could affect the recovery yields of 2,4-DNP. Tetrahedron such as BF 4 − and Tf 2 N − had similar recovery yields of 2,4-DNP, while regular octahedron such as PF 6 − had slightly low recovery yields.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2022
·
IF 8.455
Kun An,Jia Gao,Yihang Chen,Jingjing Nie,Yongjin Li,Junting Xu,Binyang Du
A series of linear poly(ethylene oxide)- b -poly(4-vinylbenzyl chloride)- b -poly(4‑ ter t-butylstyrene) (PEO 113 - b -PVBC 130 - b -P t BS x or E 113 V 130 T x ) triblock terpolymers with various lengths x (=20, 33, 66, 104, 215) of P t BS block were synthesized via a two-step reversible addition-fragmentation chain transfer (RAFT) polymerization. The E 113 V 130 T x triblock terpolymers were non-crystalline because the PVBC and P t BS blocks strongly hindered the crystallization of PEO block. The effects of P t BS block length x on the phase structures of E 113 V 130 T x triblock terpolymers were investigated by combined techniques of small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). It was found that with increasing x from 20 to 215, the phase structure of E 113 V 130 T x triblock terpolymers became more ordered and changed from disordered structure , hexagonally-packed cylinder (HEX), hexagonally perforated layer (HPL), to lamellar (LAM) phase structures. Temperature-variable SAXS measurements showed that the HEX, HPL and LAM phase structures obtained for E 113 V 130 T 66 , E 113 V 130 T 104 and E 113 V 130 T 215 by thermal annealing, respectively, were thermodynamically stable in the temperature range of 30–170 °C.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Weinan Gong,Xiaoshuang Yin,Ying Liu,Yun Chen,Wenzhong Yang
The inhibitory effects of 2-amino-4-(4-methoxyphenyl)-thiazole (MPT) on mild steel corrosion were evaluated in 0.5 M H 2 SO 4 and 1 M HCl solutions, respectively. From the analysis of potentiodynamic polarization curves and electrochemical impedance spectroscopy, MPT can effectively inhibit the corrosion of mild steel in acidic solutions. Under the optimal conditions, the inhibition efficiency ( η ) was as high as 95% in 0.5 M H 2 SO 4 solution. The inhibition property of MPT was much better than that of the reported corrosion inhibitor 2-amino-4-phenylthiazole (APT). Polarization curves also demonstrated that MPT mainly inhibited the anodic corrosion of mild steel in HCl solution and the cathodic corrosion in H 2 SO 4 solution, respectively. The adsorption of MPT on the surface of mild steel was found to obey Langmuir adsorption isotherm in both acid solutions. Quantum calculations suggest that the addition of electron donor group (−OCH 3 ) endowed the molecule better adsorption ability on mild steel surface. The interaction between protonated MPT and anions on Fe (0 0 1) surface was firstly investigated using molecular dynamic stimulations, and the results showed that with the adsorption of sulfate ions, MPTH + had a superior binding energy on the surface of Fe. The investigation of UV–vis spectrum demonstrated the direct correlation of the experimental data and the theoretical calculations.
研究领域:
材料科学
·
腐蚀工程
·
电化学
·
表面科学
✓ 已验证
DOI
高影响因子
PHYSICS LETTERS A
·
2024
·
IF 2.3
Ting-ting Yan,Yi-fei Xu,Dong-yang Xi,Zhi-qing Yu,Ran Jiang,Dan-dan Zhang
The study investigates the structural stability of the hydrogen-bonded energetic material 4-nitropyrazole (4-NP, C 3 H 3 N 3 O 2 ) from ambient pressure to 10 GPa at room temperature using diamond anvil cell (DAC) and Raman spectroscopy. Based on the changes observed in the high-pressure Raman spectra, it is proposed that the hydrogen-bonded energetic material 4-NP undergoes a phase transition within the pressure range of 2.7–6.4 GPa. Upon complete pressure release from 10 GPa, the resulting spectrum is consistent with the Raman spectrum observed under ambient pressure, indicating that the phase transition is reversible. Ab initio calculations were used to explain the changes in molecular arrangements and hydrogen-bonded networks. Hirshfeld surfaces and fingerprint plots were used to directly compare the variations in packing patterns and intermolecular interactions. Based on the experimental and calculated results, it is proposed that the phase transition of 4-NP was likely caused by the rearrangements of the hydrogen-bonded networks.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1256-1267
·
IF 3.925
Lei Yin,Hui Yang Li,Tingting Ge,Yuchao Li,Cuncun Zuo,Ming Wang,GuangJun Cui,Haofei Huang,Lin Guo
A series of acid–base-loaded γ-Al2O3 catalysts was applied as the catalysts for the isomerization of 3/4-methyl-tetrahydro phthalic anhydride. With a basic metal (K or Na) as the basic source and phosphorus (P) as the acid source, γ-Al2O3 was modified by equal volume immersion. NH3/CO2-TPD, XRD, TEM/EDS, BET, and TGA were used to analyze the catalysts, and 15%-K/Al2O3 and 10%-P/Al2O3 were determined as the most appropriate catalysts. The isomers were qualitatively and quantitatively analyzed using nuclear magnetic resonance (1H-NMR) and infrared spectroscopy (IR), and the reaction mechanism for the isomer formation was proposed. With 3-MTHPA as the substrate, the acid/base reaction temperature was 165/150 °C, the reaction time was 3 h and the amount of the catalyst added was 3%. A new type of continuous isomeric fixed-bed reactor was designed. The stability of the catalyst was tested, and the activity loss was 4.6–6.6% after 10 hours of operation.
研究领域:
化学工程
·
催化科学
✓ 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）