Advanced Composites and Hybrid Materials
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2026
·Vol. 9
·期 2
·172
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IF 15.5
Pan Shijie,Li Shuli,Deng Shuduan,Li Xianghong
Lignin is an ideal precursor for developing efficient, green, and low-cost carbon dot corrosion inhibitors because it is one of the most abundant sustainable resources. Nevertheless, its potential in this field has not yet been fully exploited. In this paper, a novel type of N, S-doped lignin-based carbon dots (N, S-LCDs) with ultra-high inhibition performance was successfully prepared, using lignin as a precursor and 2-thiazoline-2-thiol as both the nitrogen and sulfur source. It was demonstrated that the N, S-LCDs maintained a high corrosion inhibition efficiency of nearly 90% within the temperature range of 20 to 50 °C, with the maximum efficiency of 97.24% observed at 30 °C. Furthermore, a prolonged immersion test over 72 h confirmed the excellent stability of N, S-LCDs. Characterization results indicated that the synergistic co-doping of N and S is the key to N, S-LCDs superior performance. The adsorption of N, S-LCDs on the cold rolled steel (CRS) surface conforms to the Langmuir adsorption isotherm, and a protective film is formed on the CRS surface through physical and chemical adsorption, thereby effectively inhibiting the corrosion process.
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高影响因子
PHYTOMEDICINE
·
2019
·
IF 4.18
Wensong Yao,Zhen Lin,Gang Wang,Shaoguang Li,Bing Chen,Yuxia Sui,Jianyong Huang,Qicai Liu,Peiying Shi,Xinhua Lin,Qicai Liu,Hong Yao
Background Cervical cancer (CCa) represents the fourth most common cause of cancer-related death in women worldwide. CCa therapy is still a major clinical challenge worldwide. Finding and developing new anti-CCa chemotherapeutic drugs is a very significant issue. Delicaflavone is a rare biflavonoid from Selaginella doederleinii Hieron , which has shown strong anti-cancer activities in our preliminary screening. Purpose The present study aimed to investigate the apoptotic effect and mechanism of delicaflavone against CCa. Methods In this study, the effect and potential mechanism of delicaflavone against CCa were investigated in vitro and in vivo by MTT assay , TEM , flow cytometry, western blot assay, qPCR assay, immunofluorescence assay and the mouse xenograft tumor model. Results It was confirmed that delicaflavone inhibited the proliferation of human CCa HeLa cells, and induced morphological changes, G2/M phase arrest and apoptosis in a dose- and time-dependent manner. HeLa cells treated with delicaflavone showed the loss of mitochondrial membrane potential , release of Cytochrome c , activation of caspases , alteration of Bax/Bcl-2 balance, and the inhibition of MAPK signaling cascades. Furthermore, delicaflavone significantly decreased tumor growth in a dose-dependent manner without apparent side effects in a xenograft tumor model of HeLa cells. Immunohistochemistry analysis confirmed the up-regulation of Caspase-9, Caspase-3, Bax protein and down-regulation of Bcl-2 protein in the xenografts tumors , which was consistent with the results in vitro . Conclusion The results of the current study show that apoptosis is induced by the mitochondrial pathway accompanying with G2/M cycle arrest and inhibition of MAPK signaling cascades in human CCa HeLa cells, which can be used as a promising therapeutic drug for CCa.
研究领域:
肿瘤学
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药理学
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细胞生物学
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分子生物学
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Journal of Water Process Engineering
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2022
·
IF 7.34
Chengdong Guan,Lijuan Yang,Lijun Zhu,Daohong Xia
The fabrication of membranes with the advantages of simple operation and high separation efficiency is considered of great importance to meet the separation challenge of the oil-in-water emulsions produced in various types of industries. Along these lines, in this work, a membrane with a biomimetic gracilaria surface was ingenious designed and manufactured by using poly-pseudorotaxane structured poly ( m -phenylene isophthalamide) (PMIA) for attaining high efficiency of the oil-in-water separation. m-Phenylenediamine (MPD) included by γ-cyclodextrin (γ-CD) was also used to participate in the synthesis of PMIA and introduce more hydroxyl groups into the polymer chains. By the implementation of a non-solvent induced phase-inversion (NIPS) method, the superhydrophilic and the underwater superoleophobic γ-CD@PMIA membrane was successfully fabricated. Under the 0.05 MPa cross-flow filtration test, in addition to the high pure water flux (1366.69 L·m −2 ·h −1 ·bar −1 ) of the γ-CD@PMIA membrane, its separation efficiency for soybean oil-in-water emulsion was higher than 98.20 %. Moreover, during the application of the continuous separation process of up to 4 h, the membrane maintained a stable separation capacity for different oily wastewaters, which proved its good anti-pollution performance. Furthermore, the membrane exhibits good stability in harsh environments, which is of great significance for the future development of membranes with excellent chemical stability. Our work paves the way for the design of a novel biomimetic surface-based membrane with efficient oil-in-water emulsion separation properties.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Shi Zhou,Jing Yin,Qiang Ma,Baikerouzi Baihetiyaer,Jiaxue Sun,Ya Zhang,Yanji Jiang,Jun Wang,Xianqiang Yin
In this study, a type of montmorillonite-reduced graphene oxide aerogel (M−rGO) was successfully prepared by the sol–gel method and used for the effective removal of heavy metals (cadmium, Cd) and cationic dyes (methylene blue, MB) in wastewater. The chemical composition and micromorphology of the resulting M−rGO were characterized utilizing scanning electron microscopy and energy dispersive spectrometry, Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, and X-ray diffraction. Furthermore, the effects of the initial concentration, adsorption time, and temperature on the static adsorption process were systematically studied. Equally important, the effects of the concentration, pH, ionic strength (IS), and pumping flow rate of contaminated solution on the dynamic removal of Cd and MB by M−rGO were investigated by a fixed-bed column experiment. The kinetics, isothermals, and thermodynamic adsorption experiment results showed that the Langmuir and pseudosecond-order models best suited the adsorption process in which physical adsorption and chemical adsorption act together. Functional groups containing O and C were involved in the adsorption of Cd and MB, and the hydrogen bonds, π-π, n-π interaction, and hydrophobic interaction between M−rGO and MB made important contributions to adsorption. The lower initial concentration, higher pH value, and slower pumping flow rate of the contaminated solution can effectively increase the dynamic adsorption capacity of Cd and MB on M−rGO. Contrary to that of Cd, the adsorption capacity of MB on M−rGO increased with IS. Both static adsorption and dynamic column experiments confirmed that the presence of Cd promoted the adsorption of MB, and MB inhibited the adsorption of Cd by M−rGO. In addition, the Cd/MB combined pollution wastewater experiment and the regeneration study showed that M−rGO could be a cost-effective and promising sorbent for Cd and MB wastewater treatment due to its high efficiency and excellent reusability.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 16
·52004
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IF 3.125
Taolin Li,Lin Zou,Kaichang Cheng,Xiang Liu,Honghui Shi,Qingqing Yang,Baobao Chang,Xianzhang Shi,Jialu Ma,Chuntai Liu,Changyu Shen
As one of the high-performance polymer fibers, poly(m-phenylene isophthalamide) (PMIA) is widely used in the area of military and aerospace applications. Whereas, its insulation and hydrophilic nature may lead to electric charge accumulation and dust adherence. This work aims to fabricate a PMIA fabric with integrated conductive and superhydrophobic abilities via a simple method including γ-ray irradiation and dip-coating. Results show that after γ-ray irradiation, the surface roughness of PMIA was enhanced and the content of the oxygen element was increased. In the dip-coating step, the micro-pits and grooves on the surface of PMIA were covered totally by a layer of graphene oxide (GO). After reduction to reduced GO (rGO), a conductive network was built. The conductivity of the fabric was decreased to a minimum value of 0.5 Ω m. Meanwhile, the quite low volume resistivity was retained as 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFTS)/hydrophobic fumed silica nanoparticles (SiO 2 ) was decorated on rGO. Due to the microscale aggregation constituted by nano-SiO 2 , the fabric presented a superhydrophobic property and self-cleaning ability against simulated Lunar dust. Furthermore, the durability performance proves that an excellent environment-tolerant ability has been endowed to the PMIA fabric by the modification.
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RSC Advances
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2021
·Vol. 11
·期 35
·21607-21621
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IF 3.361
Mingjun Cui,Xia Li
Novel nitrogen and sulfur co-doped carbon dots (N,S-CDs) were synthesized via a hydrothermal procedure using citric acid (CA) and thiourea (TU) as precursors, and the corresponding corrosion protection performance was first investigated for Q235 carbon steel in 1 M HCl solution. Experimental results indicated that N,S-CDs as mixed-type corrosion inhibitors could effectively prevent Q235 carbon steel from corrosion in 1 M HCl solution, and the corrosion inhibition efficiency was improved with the increase in N,S-CD concentration. The maximum value was achieved at 400 ppm of N,S-CDs at 25 °C, which was approximately 96.6%, 94.6% and 90.55%, according to the potentiodynamic polarization curves, EIS results and weight loss measurement, respectively. Additionally, with the temperature ranging from 25 to 55 °C, the inhibition efficiency obtained from the weight loss measurement was enhanced from 90.55% to 94.04%. Such superior inhibition effect was assigned to the physisorption and chemisorption of N,S-CDs on the Q235 carbon steel surface, which was also be confirmed by XPS analysis. The adsorption of N,S-CDs onto a steel substrate conformed to the Langmuir adsorption isotherm.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Tao Peng,Zhiwei Sui,Zhenghui Huang,Jie Xie,Kai Wen,Yongzhuo Zhang,Wenfeng Huang,Wei Mi,Ke Peng,Xinhua Dai,Xiang Fang
The coronavirus disease 2019 (COVID-19) epidemic continues to ravage the world. In epidemic control, dealing with a large number of samples is a huge challenge. In this study, a point-of-care test (POCT) system was successfully developed and applied for rapid and accurate detection of immunoglobulin-G and -M against nucleocapsid protein (anti-N IgG/IgM) and receptor-binding domain in spike glycoprotein (anti-S-RBD IgG/IgM) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Any one of the IgG/IgM found in a sample was identified as positive. The POCT system contains colloidal gold-based lateral flow immunoassay test strips, homemade portable reader, and certified reference materials, which detected anti-N and anti-S-RBD IgG/IgM objectively in serum within 15 min. Receiver operating characteristic curve analysis was used to determine the optimal cutoff values, sensitivity, and specificity. It exhibited equal to or better performances than four approved commercial kits. Results of the system and chemiluminescence immunoassay kit detecting 108 suspicious samples had high consistency with kappa coefficient at 0.804 (P < 0.001). Besides, the levels and alterations of the IgG/IgM in an inpatient were primarily investigated by the POCT system. Those results suggested the POCT system possess the potential to contribute to rapid and accurate serological diagnosis and epidemiological survey of COVID-19.
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Molecular Catalysis
·
2020
·
IF 3.687
Jingyi Yang,Yanping Fan,Zhong-Li Li,Zhikun Peng,Jing-He Yang,Baozhong Liu,Zhongyi Liu
Herein, we reported an effective method to synthesis a series of supported bimetallic Pd-M/SiO 2 (M = Pt, Ni, Cu, Co) catalysts with highly exposed and well-alloyed nanoparticles via simultaneous strong electrostatic adsorption (co-SEA), which controlled metal precursors strongly anchored onto the oppositely charged support (SiO 2 ) by changing the pH relative to the surface point of zero charge (PZC). The toluene and benzene hydrogenation were used as probe reactions to evaluate the catalytic hydrogenation activity performance of the Pd-M/SiO 2 catalysts. Compared to the catalysts synthesized by the common technique simultaneous dry impregnation (co-DI), the co-SEA Pd-Ni/SiO 2 catalyst exhibited the highest turnover frequencies (TOFs) of 3.7 s −1 for benzene hydrogenation and 3.2 s −1 for toluene hydrogenation. This was attributed to the large amount of electron-deficient Pdδ + sites on the surface of SEA Pd-M/SiO 2 that easily for electron-rich benzene and toluene to adsorb. Besides, the co-SEA catalysts produced well stability and reusability without significant decrease in the catalytic activity after six runs.
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SOLID STATE SCIENCES
·
2020
·
IF 2.434
Xiaofang Li,Yuandong Wu,Dajiang Mei,Hagen Poddig,Thomas Doert
Three hexasodium transition metal sulfates, Na 6 M (SO 4 ) 4 ·2H 2 O ( M = Fe, Co, Ni) were obtained by a dissolution and precipitation route and by hydrothermal reactions . The compounds were characterized by single crystal X-ray diffractions, UV/vis and IR spectroscopy , thermal analyses, and magnetization measurements. The title compounds all crystallize in the triclinic space group P 1 ‾ (No. 2) with Z = 1 and lattice parameters : a = 6.0679(8), b = 6.8658(8), c = 10.1508(12) Å, β = 92.557(4)° for Na 6 Fe(SO 4 ) 4 ·2H 2 O; a = 6.0595(5), b = 6.8446(6), c = 10.1149(8), β = 92.548(2)° for Na 6 Co(SO 4 ) 4 ·2H 2 O; a = 6.0490(4), b = 6.8265(5), c = 10.0793(7), β = 92.5470(10)° for Na 6 Ni(SO 4 ) 4 ·2H 2 O, respectively. [M(SO 4 ) 4 ] 6- anions are interconnected by hydrogen bonds to form two-dimensional layers in these structures. The solid-state UV/vis/NIR diffuse reflectance spectroscopy indicates that Na 6 M (SO 4 ) 4 ·2H 2 O ( M = Co, Ni) are insulators. Magnetization experiments show a nearly linear temperature dependence of the inverse susceptibility down to 2 K, which indicates a paramagnetic behavior for all three compounds.
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MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Guohan Sun,Shiqiao Wang,Jianfeng Zhou,Jianbin Pan,Yanli Tong,Qinghua Mei,Haiyun Zhai
In the present study, a novel and facile poly-m-amino-benzenesulfonic acid (p-m-ABSA) film on glassy carbon electrode (GCE) was developed using pulse potentiostatic method (PPM), which is employed with the oxidative polymerization of m-ABSA at anode potential. Meanwhile, a simple and sensitive sensor was fabricated to detect normetanephrine (NMN), which is one of the significant diagnostic markers for diseases. Compared with bare GCE, the p-m-ABSA film prepared on GCE surface has the advantage of increasing electrode surface area and active sites distinctly, thus obviously improving the electrocatalytic activity. The results demonstrated that the developed electrochemical sensor exhibited high sensitivity, stability, selectivity and excellent electrocatalytic activity towards NMN. The surface morphology of p-m-ABSA/GCE was characterized by scanning electron microscopy (SEM), indicating that the electrode surface had a layered structure. The preparation conditions and analysis methods of sensors were studied in detail. Under optimum conditions, peak current and concentrations of NMN were linearly related well from 0.5 to 30.0 µM with a limit of detection (S/N = =3) of 0.17 µM. Moreover, this modified sensor has also been successfully used for the detection of NMN in human serum samples.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Peixi Hao,Linwen Jiang,Hanlei Zhao,Jiangtao Li,Shiwen Qiu,Hongbing Chen
The MFeO 3 : R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders were successfully synthesized by the sol–gel combustion method using glycine-based gel at a low ignition temperature. The as-burnt products present honeycomb-like structure with many irregular continuous pores due to the releasing of a large amount of gas during the combustion reaction process. The lattice parameters and cell volumes of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders are compared in detail. The magnetic properties of all the samples were studied systematically. The results show that the doping of rare-earth ions enhanced greatly the coercivity of GdFeO 3 and LaFeO 3 as a result of the enhancement of magnetic anisotropy . The influence of doped rare-earth ions on the magnetic properties was summarized. The distinction of magnetism of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) were explained in detail by the intrinsic magnetism of doped rare-earth ions. This work is significant for the application of rare-earth elements in other magnetic materials.
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ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Zhengquan Yan,Xuemei Zhou,Lingmin Kong,Wenjing Xu,Junkai Hao,Shuo Sun,Jing Feng,Huitian Zhi,Xiao Zhu,Lei Hu
To effectively differentiate toxic aminophenol isomers, a kind of spindle-shaped Cu-Ru bimetal mesoporous nanozyme (Cu-Ru MPNZ) with high specific surface was developed by one-pot homogeneous reduction method, directed by hexadecyl trimethyl ammonium bromide (CTAB) in this work. By virtue of the distinctive microstructure, Cu-Ru MPNZ expressed superior bi-functional oxidase- and peroxidase-mimic activity to catalyze the oxidation of 3,3′,5,5,’-tetramethylbenzidine (TMB) and 2,2′-azinobis (3-ethylbenzothiazoline-6- sulfonic acid) ammonium salt (ABTS) with low Michaelis-Menten constants and quick reaction rates. Especially, toxic aminophenol isomers could exclusively react with the oxydates of TMB or ABTS to express differentiable signals in color. Under the optimal conditions, Cu-Ru MPNZ was successfully applied for visual differentiation of toxic aminophenol isomers in real aqueous, juices and medicinal samples with low detection limits (1.60 × 10 −8 mol/L for o -aminophenol and 3.25 × 10 −8 mol/L for m -aminophenol) and satisfactory recoveries (96.6–103.5%). The different recognition mechanisms of Cu-Ru MPNZ to toxic o - and m -aminophenol isomers were proposed for the first time as far as we known. This work will provide a potential way to monitor different organic isomer pollution in future.
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危险品化学品经营许可证（带存储）