ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 5
·5094-5110
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IF 2.914
Zhang Mengjiao,Zhu Liyun,He Changhua,Xu Xiaojun,Duan Zhengyang,Liu Shuli,Song Mingyao,Song Shumin,Shi Jiemei,Li Yu’e,Cao Guangzhu
In this study, the novel adsorbent PVA-TA-βCD was synthesized via thermal cross-linking between polyvinyl alcohol and β-cyclodextrin. The characterization methods SEM-EDS, FTIR, and XPS were adopted to characterize the adsorbent. The effect of pH, contact time, initial concentrations, and temperature during the adsorption of Pb(II), Cd(II), and Mn(II) onto the PVA-TA-βCD was also investigated. In a single-component system, the data fitted well to pseudo-second-order, and film diffusion and intra-particle diffusion both played important roles in the adsorption process. As for isotherm study, it showed a heterogeneous adsorption capacity of 199.11, 116.52, and 90.28 mg g −1 for the Pb(II), Cd(II), and Mn(II), respectively. Competition between the ions existed in a multi-component system; however, owing to the stronger affinity of the PVA-TA-βCD for Pb(II) relative to Cd(II) and Mn(II), the Pb(II) adsorption onto the PVA-TA-βCD was less affected by the addition of the other metals, which could be effectively explained by the hard and soft acid and base theory (HSAB). Furthermore, PVA-TA-βCD showed good reusability throughout regeneration experiments.
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ULTRASONICS SONOCHEMISTRY
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2018
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IF 6.012
Nan Chang,Dui Qin,Pengying Wu,Shanshan Xu,Supin Wang,Mingxi Wan
Inertial cavitation is crucial for the therapeutic effects of sonodynamic. Therefore, approaches that can induce highly efficient inertial cavitation should be of benefit for sonodynamic effect. Our previous study demonstrated that highly efficient inertial cavitation activity can be achieved through the combinatorial use of a short-pulsed focused ultrasound (SPFU) sequence and perfluorohexane (PFH) nanodroplets. Herein, we applied the SPFU sequence and PFH nanodroplets in sonodynamic. A hydrophobic sonosensitizer, IR780 iodine, was loaded inside denatured bovine serum albumin-shelled PFH (PFH@BSA-IR780) nanodroplets. The sonodynamic efficacy was validated by treating HeLa cervical cancer cells. Under SPFU exposure, PFH@BSA-IR780 nanodroplets were highly effective in promoting reactive oxygen species generation and inducing cancer cell death. A significant decrease in cell viability was achieved within just 10 s. Besides the cytotoxicity of ROS, the mechanical bioeffects of inertial cavitation also led to severe cell death resulting from higher acoustic power or the longer treatment time. The application of the SPFU sequence coupled with PFH@BSA-IR780 nanodroplets is a promising strategy for efficient sonodynamic.
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CARBOHYDRATE POLYMERS
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2019
·
IF 6.044
Wenjiao Ge,Shan Cao,Feng Shen,Yuyuan Wang,Junli Ren,Xiaohui Wang
Here, we designed a self-healing composite hydrogel with antioxidant and antibacterial activities by using cellulose nanofibrils (CNF) and tannic acid (TA) as functional additives. Excellent mechanical stability, moldability, stretchability and rapid self-healing ability without any external intervention were realized in one system due to the combined dynamic borate ester bonding between polyvinyl alcohol-borax (PB) and multi-hydrogen bonding between different components. The rheological measurements indicated the incorporation of CNF and TA to PB system substantially affected the viscoelasticity of hydrogels. The unique antioxidant and antibacterial properties were achieved due to the complexation of TA. These high performance multifunctional hydrogels opens a window for a broad application in the field of smart devices and surface engineering.
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Nature Communications
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2019
·Vol. 10
·期 1
·1-16
·
IF 11.878
Li Wei,Yang Jie,Luo Lihua,Jiang Mengshi,Qin Bing,Yin Hang,Zhu Chunqi,Yuan Xiaoling,Zhang Junlei,Luo Zhenyu,Du Yongzhong,Li Qingpo,Lou Yan,Qiu Yunqing,You Jian
Immunogenic cell death (ICD)-associated immunogenicity can be evoked through reactive oxygen species (ROS) produced via endoplasmic reticulum (ER) stress. In this study, we generate a double ER-targeting strategy to realize photodynamic therapy (PDT) photothermal therapy (PTT) immunotherapy. This nanosystem consists of ER-targeting pardaxin (FAL) peptides modified-, indocyanine green (ICG) conjugated- hollow gold nanospheres (FAL-ICG-HAuNS), together with an oxygen-delivering hemoglobin (Hb) liposome (FAL-Hb lipo), designed to reverse hypoxia. Compared with non-targeting nanosystems, the ER-targeting naosystem induces robust ER stress and calreticulin (CRT) exposure on the cell surface under near-infrared (NIR) light irradiation. CRT, a marker for ICD, acts as an ‘eat me’ signal to stimulate the antigen presenting function of dendritic cells. As a result, a series of immunological responses are activated, including CD8 + T cell proliferation and cytotoxic cytokine secretion. In conclusion, ER-targeting PDT-PTT promoted ICD-associated immunotherapy through direct ROS-based ER stress and exhibited enhanced anti-tumour efficacy.
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JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Xiaobin Yang,Linlin Yan,Yadong Wu,Yuyan Liu,Lu Shao
The polymeric membrane has been widely used for wastewater remediation due to its low energy consumption and benign mechanical properties . Its inherent hydrophobicity leads to non-ideal performances during energy-/environmental-related processes, the surface manipulation strategies towards much hydrophilicity are urgently to be developed for practical usages. Herein, a biomimetic coating is realized on porous membrane surface for surface hydrophilization via facilely combining mussel-inspired chemistry with polyphenol-based surface engineering. The as-deposited eco-friendly biomimetic coating greatly enhanced membrane hydrophilicity, infiltration , and antifouling potential via one-step co-depositing dopamine and plant-derived tannic acid. As a demonstration, water remediations of oil-in-water emulsion and simulated protein wastewater were conducted, leading to highly-efficient separation performances and antifouling potential. The initial flux of modified microfiltration membrane for the cycling oil-in-water emulsion separation could reach ca. 2100 L m −2 h −1 with oil rejection of >99.6%; the corresponding ultrafiltration membrane exhibited benign protein interception performance (BSA rejection of 93% with water flux of 490 L m −2 h −1 ) and antifouling ability (80% enhancement). Most importantly, the novel modified membrane demonstrates the ultra-stability under harsh bending and leaching tests. The facile biomimetic surface hydrophilization engineering will greatly power the membrane-based water environment remediation and stimulate the rapid advances in control release, anti-corrosion coating and other fields highly depending on surface properties.
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MICROCHIMICA ACTA
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2019
·Vol. 186
·期 6
·1-9
·
IF 5.479
Song Hongwei,Li Xin,He Yanfang,Peng Yinxian,Pan Jianming,Niu Xiangheng,Zhao Hongli,Lan Minbo
The authors present a colorimetric method for the evaluation of the hydroxyl radical scavenging capability of antioxidants by exploiting carbon-confined mixed cobalt oxide nanoparticles (denoted as C-confined CoO x NPs) as a novel peroxidase mimic. The nanozyme can be prepared from the metal-organic framework ZIF-67 by calcination at a moderate temperature. It exhibits peroxidase-mimicking activity and catalyzes the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to form a blue product in the presence of H 2 O 2 via generation of hydroxyl radicals. However, in the presence of an antioxidant, the color reaction is suppressed due to scavenging of hydroxyl radicals by the antioxidant. Based on this principle, the hydroxy radical scavenging ability of glutathione (GSH), cysteine (Cys), tannic acid (TA) and tea polyphenols (TP) was assessed. It was found that these antioxidants can scavenge hydroxyl radicals in the following decreasing order: TA>Cys>GSH>TP. The assay was also used to quantify the antioxidative power of common fruit extracts.
Schematic presentation for evaluating the hydroxyl radical scavenging ability of different antioxidants using carbon-confined mixed cobalt oxide nanoparticles (denoted as C-confined CoO x NPs) as a highly active peroxidase mimic. With excellent activity, the C-confined CoO x NPs together with the visible peroxidase reaction can be employed as a powerful tool to rapidly screen appropriate antioxidants from natural samples and measure their activity for guiding their usage in related products.
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ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Haiyan Qiao,Pengfei Qi,Xiaohui Zhang,Linan Wang,Yeqiang Tan,Zhaohui Luan,Yanzhi Xia,Yanhui Li,Kunyan Sui
Herein, we demonstrate a ternary ionic hydrogel sensor consisting of tannic acid, sodium alginate, and covalent cross-linked polyacrylamide as skin-mountable and wearable sensors. Based on the multiple weak H-bonds and synergistic effects between the three components, the as-prepared hybrid hydrogel exhibits ultrastretchability with high elasticity, good self-healing, excellent conformability, and high self-adhesiveness to diverse substrates both in air and underwater. More importantly, the ternary hydrogel exhibits high strain sensitivity especially under subtle strains with a gauge factor of 2.0, which is close to the theoretical value of the ionic hydrogel sensors; an extremely large workable range of strain (0.05–2100%); and a low operating voltage 0.07 V. Consequently, the sensor demonstrates superior sensing performance for real-time monitoring of the large and subtle human motions, including limb motions, swallowing, smiling, and wrist pulse. Therefore, it is believed that the STP hydrogel has great potential applications in health monitoring, smart wearable devices, and soft robots.
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ACS Biomaterials Science & Engineering
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2018
·
IF 4.432
Long Meng,Kai Pan,Ye Zhu,Wei Wei,Xiaojie Li,Xiaoya Liu
Herein, a hydrophobized zwitterionic-based copolymer poly(sulfobetaine methacrylate-co-2-(dimethylamino)ethyl methacrylate-co-isobornyl acrylate) (P(SBMA-co-DMA-co-ISA), PSDI) containing a chiral structure has been successfully synthesized by free radical polymerization and subsequent sulfonation reactions. Together with tannic acid (TA), PSDI colloidal particles (CPs) were anchored onto the Ti alloy surface by the electrophoretic deposition method. The composition, morphology, and surface properties of the CP-TA composite coatings were characterized by fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), optical contact angle (OCA), and other methods. The results show that the introduction of TA improves the stability of coatings by participating in the noncovalent interactions including ionic pairing and hydrogen bonding. According to the in vitro bacterial adhesion test, the modified titanium surface containing SBMA and chiral ISA functional units can effectively inhibit Gram-negative bacteria (E. coli) and Gram-positive bacteria (S. aureus) adhesion. Furthermore, the excellent cytocompatibility and favorable cell adhesion and growth behavior of zwitterionic-based coatings were realized as a result of the appropriate hydrophobicity provided by the ISA moiety. This work provides a new strategy for preparing zwitterionic-based multifunctional coating. The coating with excellent bacterial and cell selective adhesion properties has great potential in the applications of metal implant materials, such as cardiovascular stents and human hard tissue repair and replacement materials.
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International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 12
·2187
·
IF 2.468
Yue Teng,Zhiying Liu,Ke Yao,Wenbin Song,Yongjun Sun,Hailing Wang,Yanhua Xu
The use of attapulgite (ATP)-based materials for adsorption of pollutants from water and wastewater has received growing attention. However, recovering ATP-based adsorbents remains a challenge. In this study, a magnetic adsorbent ATP/CoFe2O4with high tannic acid (TA) adsorptive capacity was fabricated via a facile co-precipitation approach and was well characterized. The loaded CoFe2O4particles were embedded into the adsorbent surfaces to allow magnetic separability. For this material, its TA adsorption kinetics, isotherm behavior, and magnetic separation efficiency are reported. The developed magnetic composites had rapid sorption kinetics of 3 h, high sorption capacity of 109.36 mg/g, and good magnetic separation efficiency of 80%. The used ATP/CoFe2O4was successfully regenerated by NaOH and reused five times without a substantial reduction in TA removal and magnetic performance. Intermolecular hydrogen bonding formation and surface complexation were identified as the sorption mechanisms of TA by ATP/CoFe2O4.Keywords:attapulgite;adsorption;CoFe2O4magnetic nanoparticle;tannic acid
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 10
·A1884
·
IF 3.12
Xu Wang,Dawei Gu,Junjie Yu,Hongying Jiang,Hongshun Sun,Lei Wang,Linjiang Shen
Polyaniline and ruthenium oxide electrodes are prepared to assemble the supercapacitors. The electrochemical properties of the electrodes are studied by cyclic voltammetry and galvanostatic charging/discharging measurements. The potential dependence of specific capacitance for the electrodes in the supercapacitors is established. Based on the relationship between specific capacitance and potential of electrodes, the optimum mass ratio of the electrodes in asymmetric supercapacitor of ruthenium oxide//polyaniline can be accurately determined. The working voltage window for ruthenium oxide//polyaniline supercapacitor is significantly increased by the modulation of mass ratio. Accordingly, the electrical energy density of supercapacitor with a mass ratio of = 0.79 is as high as 7.25 Wh kg−1, about 314% higher than that of the supercapacitor with a mass ratio of 0.26.
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MATERIALS SCIENCE FORUM
·
2018
·
IF 0
Miao Ying Jin,Shi Yan Chen,Bao Xiu Wang,Hua Ping Wang
Wound healing is accompanied by keloids, it is important to develop a wound dressing which can inhibit keloid and relieve pain and pruritus in patients. In this paper, bacterial cellulose/triamcinolone acetonide (BC/TA) composites are prepared by easy solution impregnation method, which the structures of BC/TA composites were analyzed by fourier transform infrared spectroscopy (FTIR). The drug release and inhibition of L929 cells were also analyzed. It can be concluded that BC/TA composites have a sustained release effect on TA and can effectively inhibit proliferation of L929 in the range of 0.5-2.0 mg/cm2.
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JOURNAL OF MEMBRANE SCIENCE
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2018
·
IF 6.578
Huazhen Sun,Beibei Tang,Peiyi Wu
Metal-organic frameworks (MOFs) are being intensively investigated for the design of advanced composite membranes , primarily due to their favorable polymer affinity, and highly tunable porous structure and surface properties. However, the development of engineered MOF-based ultrafiltration (UF) membranes for water treatment remains in its infancy. In the present study, hydrophilic hollow zeolitic imidazolate framework-8 (hZIF-8) was meticulously synthesized via surface functionalization-assisted etching approach by using tannic acid (TA), and then incorporated into polysulfone (PSf) casting solution to fabricate novel hybrid UF membranes via phase inversion method. The resultant hZIF-8 not only possessed a highly hydrophilic surface derived from the coated TA but also yielded a unique hollow structure without destroying the intrinsic frameworks. Thanks to the well-tailored surface property and nanostructure of hZIF-8, the obtained PSf/hZIF hybrid UF membranes showed highly improved water permeation (597 L m −2 h −1 ), which was 2.8 times that of the pristine PSf membrane (210 L m −2 h −1 ), while well maintaining the rejection property. What's more, the incorporation of hZIF-8 rendered the membrane with enhanced resistance to fouling. These results indicated the great application potential of such MOF/polymer hybrid UF membranes in wastewater treatment and separation in many industrial fields.
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