MICROCHIMICA ACTA
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2022
·Vol. 189
·期 6
·1-11
·
IF 6.408
Guo Jingjing,Liu Yangyang,Mu Zhao,Wu Shu,Wang Jueyu,Yang Yue,Zhao Min,Wang Yan
A bifunctional Ni-MOF nanosheet was synthesized and developed for label-free fluorescent detection of H 2 O 2 and glucose. The Ni-MOF exhibited intrinsic peroxidase-like activity and its catalytic activity was demonstrated to be originated from the hydroxyl radicals (•OH) produced in catalytic process. Since the generated •OH enabled terephthalic acid, the non-fluorescent organic ligand of Ni-MOF, to form a strongly fluorescent 2-hydroxy terephthalic acid, the Ni-MOF nanozyme was endowed with dual-function properties of mimicking peroxidase and emitting fluorescence. Based on this bifunctional Ni-MOF nanozyme, the proposed label-free fluorescence sensing strategy was applied to detecting H 2 O 2 and glucose with wide linear ranges of 0.1–20 mM and 8–30 μM, and low detection limits of 4.0 × 10 −5 M and 4.0 × 10 −6 M, respectively. Furthermore, the bifunctional Ni-MOF-based label-free sensing platform was successfully used for the glucose detection in human serum samples, showing good reproducibility and high accuracy. This strategy provides a green and sensitive method for the determination of small biomolecules in practical applications by the combination of enzyme cascade reaction. Graphical abstract
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高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2022
·
IF 3.682
Junyu Liu,Haifeng Liu,Yongliang Jia,Ziwei Tan,Ruxia Hou,Jie Lu,Dongmei Luo,Xinyu Fu,Lu Wang,Xiangyu Wang
A glucose-sensitive antibacterial and anti-inflammatory hydrogel film with controlled release of tannic acid (TA) was synthesized using chitosan (CS). Specifically, the photo-crosslinked CS hydrogel was first obtained and then immersed in TA solution to generate composite hydrogel film with enhanced mechanical properties. Subsequently, N-hydroxysuccinimide/1-ethyl-3-(3-dimethylaminopropyl) carbodiimide based coupling chemistry was used to covalently crosslink glucose oxidase (GOx) to CS to obtain glucose sensitivity. The physicochemical properties, including chemical composition, enzyme-related characteristics, glucose responsiveness, and mechanical strength, were thoroughly investigated, followed by the cytotoxicity, antibacterial and anti-inflammatory tests. The results showed that the GOx immobilized on the film surface by covalent bonding gave better stability than those that were physically adsorbed. In addition, it could quickly and correspondingly modify its inner pore structure in response to the glucose stimulus and then control the loaded TA release. Meanwhile, the TA addition could enhance the film's mechanical properties. The composite hydrogel film demonstrated adequate biocompatibility and can inhibit NO, IL-6, and TNF-α production in stimulated macrophages, as well as Porphyromonas gingivalis growth, demonstrating effective antibacterial and anti-inflammatory activity.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2022
·Vol. 102
·期 13
·5814-5825
·
IF 4.125
Xin-lei Zhao,Yi-hong Bao,Yang Guo,Jia-yuan Luo,Shi-long Jiang,Xue Yang
BACKGROUND For decades, pine nut oil Pickering emulsions have been stabilized using a covalent composite of two phenolic chemicals (tannic acid, TA; and gallic acid, GA) and whey protein isolate (WPI) following alkali treatment. Based on covalent composite particles being excellent sources of high-quality stabilizers, this research explored the influence of phenolic addition and hydroxyl content on stability, rheological parameters and characterization of Pickering emulsions. RESULTS Tannic acid was more effective in reducing the average particle size of the emulsion, which decreased from 479.4 ± 2.1 nm without addition to between 187.6 ± 5.9 and 368.2 ± 16.8 nm ( P < 0.05). The potential values of all the emulsions were between −30 and −50 mV (except for the gallic acid addition of 2.5 g kg −1 ). When the phenolic addition was 7.5 g kg −1 , emulsions demonstrated the best emulsification ability. Pickering emulsion stabilized by WPI-TA and WPI-GA particles were successfully generated, according to confocal laser scanning microscopy. Rheological results showed that the increase of phenolic addition contributed to larger elastic modulus ( G ′), viscosity modulus ( G ″) and viscosity of emulsions, which was beneficial to the stability of emulsions. CONCLUSION Both phenolic compounds significantly improved the physicochemical stability of the emulsions ( P < 0.05) and their oxidative stability. Covalently crosslinking phenolic compounds to proteins is a better method to prepare stable emulsions. It is more prominent that TA shows a more significant improvement in emulsion stability due to the number of hydroxyl groups it can provide. This research might serve as a theoretical foundation for enhancing the quality of pine nut oil-related products. © 2022 Society of Chemical Industry.
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ChemPhotoChem
·
2022
·Vol. 6
·期 5
·e202100208
·
IF 3.679
Tian-Jiao Lou,Jing-Qi Wang,Wenyi Wang,Tao Wang,Peng-Fei Qian,Ze-Long Bao,Li-Chao Jing,Xiao-Tong Yuan,Hong-Zhang Geng
Graphical Steps in the right direction : ZnO/CNT (carbon nanotube) heterojunctions were prepared by non-covalent modification of CNTs using a simple spraying method and subsequent annealing. This heterojunction was constructed without affecting the film sheet resistance and transmittance, and the non-covalently modified CNT showed a substantial improvement in the recession time relative to the pristine CNT and improved the device with higher photoresponsivity and detectivity at 365 nm. Flexible electronic devices have received significant attention in recent years as a result of their flexibility and portability. Carbon nanotube (CNT) films could serve as a promising material for photodetection because of their broad absorption spectral coverage. In this research, vertical ultraviolet (UV) to visible (UV/Vis) detectors based on tannic acid functionalized carbon nanotube/zinc oxide (TCNT/ZnO) heterojunctions were prepared by a simple spraying method. The TCNT electrode had excellent photoelectric properties with a sheet resistance of 40.6 Ω/sq and transmittance of 80.4 % at 550 nm, and the resulting TCNT/ZnO device could achieve photocurrent of 3.0 mA at 360 nm in the UV range, a recession time of 8.05 s, photoresponsivity of 7.12 A/W, and detectivity of 25.2×10 11 Jones. As a comparison, for the pure CNT electrode with a sheet resistance of 45.5 Ω/sq and transmittance of 79.6 % at 550 nm, the CNT/ZnO photocurrent was only 0.6 mA at 360 nm, with a recession time of 17.25 s, photoresponsivity of 1.00 A/W, and detectivity of 3.4×10 11 Jones. The prepared device was also able to operate stably after 1000 mechanical bending tests and maintained more than 95 % detectivity, providing a feasible path for the generation of carbon nanotube based photodetector devices.
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POLYMER
·
2022
·
IF 4.432
Wenyan Song,Tianfeng Huang,Huajiang Zuo,Dongmei Deng,Chunyi Tang
Environmentally friendly natural materials, chitosan (CS) and tannic acid (TA), were used to prepare a composite membrane and immobilize Stenotrophomonas maltophilia on it, which was then applied for removing manganese in water. Surface morphology was investigated, and the amount of immobilized fungus on the composite membrane was probed using scanning electron microscopy (SEM). A composite membrane was prepared by grafting CS and TA on a cotton cloth, and the experimental conditions were optimized; preferential immobilization of S. maltophilia on the composite was achieved. A Mn 2+ standard calibration curve was obtained via atomic absorption spectroscopy ; the removal of manganese ions was determined and compared before and after immobilization on the composite membrane. For glutaraldehyde concentration of 8%, solution pH of 5, TA concentration of 0.05 g/mL, and temperature of 80 °C, the grafting of the TA/CS composite membrane was the best, resulting in better immobilization of S. maltophilia . SEM images showed that a large number of S. maltophilia were immobilized on the composite membrane, substantially improving the manganese removal performance. The removal rate of the manganese ions was the best and reached >70% for solution pH of 5 and Mn 2+ concentration of 0.6–1.2 mg/L.
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ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 21
·2112685
·
IF 19.924
Xinghuan Lin,Xin Xing,Shanshan Li,Xiaoyi Wu,Qiaoqiao Jia,Hu Tu,Haolin Bian,Ang Lu,Lina Zhang,Hongye Yang,Bo Duan
Anisotropic structure is key for exploring the biomimetic functions of anisotropic hydrogels. However, the anisotropic hydrogel study should not be limited to its architecture design but must include the understanding and improvement of the internal interaction among their components. Herein, a noncovalent mediated assembly strategy is proposed to simultaneously improve the chitin chain mobility and enhance the interfacial interaction, for achieving anisotropic chitin/2D material (molybdenum disulfide and brushite as example) hydrogels via mechanical deformation. Tannic acid (TA) is used to i) introduce the dynamic noncovalent crosslinking structure among the chitin chains for affording considerable molecular mobility to allow chitin chains alignment under mechanical deformation; ii) enhance chitin–2D interfacial interaction for benefiting 2D materials orientation under the chitin chains driving. The design concept achieves multiple noncovalent assembly crosslinks (chitin–chitin, chitin–TA, and chitin–TA–2D) and biomimetic anisotropic nanofibrous morphology, leading to the superior mechanical performance. The anisotropic chitin–TA/brushite hydrogel effectively accelerates bone regeneration by promoting cell osteogenic differentiation and directional migration, showing potential in tissue engineering. It is anticipated that the noncovalent mediated assembly concept could be used to fabricate other polymer based composite anisotropic hydrogels for diverse applications.
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MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Zhenhu Guo,Jingsong Lu,Wensheng Xie,Xuezhong Li,Hong Wu,Lingyun Zhao
The strategic design for fabricating metal phenolic networks (MPNs) at different dimension brings potential possibilities to obtain MPNs-based system with controlled structure, biologically tunable physicochemical properties and high responsiveness behavior. Considering adequate Fe ions within Fe-based materials, self-supplied metal ions for polyphenol to form coating layer on the surface are served as a novel and facile strategies to obtain metal-based phenolic networks composites. Combing these, herein, a simple, green and fast strategy was performed to fabricate recyclable Fe@Fe 3+ -tannic acid-Au (Fe@MPNs-Au) system with high efficiency to catalyze the reduction of 4-nitrophenol. The obtained experimental results showed that the catalytic rate of Fe@MPNs-Au for 4-nitrophenol could be improved from 0.4398 min −1 to 1.5804 min −1 with the increase of Au loading. Additionally, the increased Fe 3+ -tannic acid MPNs layer thickness could also enhance the catalytic rate of Fe@MPNs-Au from 0.2226 min −1 to 2.085 min −1 . More importantly, the superior magnetic properties contributed by Fe core make it possible to be easily separated and collected by a magnet from the solution after multiple catalytic reduction reaction. Finally, we hope this strategy can provide a novel paradigm for fabricating metal-based phenolic networks system by in situ coordinating reaction between self-supplied Fe sources and phenolic molecules.
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RSC Advances
·
2022
·Vol. 12
·期 6
·3454-3464
·
IF 4.036
Weijing Kong,Qiaolin Du,Yinan Qu,Changyu Shao,Chaoqun Chen,Jian Sun,Caiyun Mao,Ruikang Tang,Xinhua Gu
It is currently known that crosslinking agents can effectively improve the mechanical properties of dentin by crosslinking type I collagen. However, few scholars have focused on the influence of crosslinking agents on the collagen-mineral interface after crosslinking. Analysis of the Fourier transform infrared spectroscopy (FTIR) results showed that hydrogen bonding occurs between the tannic acid (TA) molecule and the collagen. The crosslinking degree of TA to collagen reached a maximum 41.28 ± 1.52. This study used TA crosslinked collagen fibers to successfully induce dentin biomineralization, and the complete remineralization was achieved within 4 days. The crosslinking effect of TA can improve the mechanical properties and anti-enzyme properties of dentin. The elastic modulus (mean and standard deviation) and hardness values of the remineralized dentin pretreated with TA reached 19.1 ± 1.12 GPa and 0.68 ± 0.06 GPa, respectively, which were close to those of healthy dentin measurements, but significantly higher than those of dentin without crosslinking (8.91 ± 1.82 GPa and 0.16 ± 0.01 GPa). The interface energy between the surface of collagen fibers and minerals decreased from 10.59 mJ m−2 to 4.19 mJ m−2 with the influence of TA. The current work reveals the importance of tannic acid crosslinking for dentin remineralization while providing profound insights into the interfacial control of biomolecules in collagen mineralization.
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npj Quantum Materials
·
2023
·Vol. 8
·期 1
·1-7
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IF 5.7
Xu R. Z.,Du X.,Zhou J. S.,Gu X.,Zhang Q. Q.,Li Y. D.,Zhao W. X.,Zheng F. W.,Arita M.,Shimada K.,Kim T. K.,Cacho C.,Guo Y. F.,Liu Z. K.,Chen Y. L.,Yang L. X.
TaTe 4 , a metallic charge-density wave (CDW) material discovered decades ago, has attracted renewed attention due to its rich interesting properties, such as pressure-induced superconductivity and candidate nontrivial topological phase. Here, using high-resolution angle-resolved photoemission spectroscopy and ab initio calculation, we systematically investigate the electronic structure of TaTe 4 . At 26 K, we observe a CDW gap as large as 290 meV, which persists up to 500 K. The CDW-modulated band structure shows a complex reconstruction that closely correlates with the lattice distortion. Inside the CDW gap, there exist highly dispersive energy bands contributing to the remnant Fermi surface and metallic behavior in the CDW state. Interestingly, our ab initio calculation reveals that the large CDW gap mainly opens in the electronic states with out-of-plane orbital components, while the in-gap metallic states originate from in-plane orbitals, suggesting an orbital texture that couples with the CDW order. Our results shed light on the interplay between electron, lattice, and orbital in quasi-one-dimensional CDW materials.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
You Wu,Yangyang Duan,Juan Qiu,Xiang Gao,Houyi Ma
The aim of this work is to develop an eco-friendly pH-responsive intelligent coating with long-term corrosion protection by a convenient method. Herein, an eco-friendly and long-term pH-responsive intelligent anti-corrosion coating (BTA-CaCO 3 @TA coating) is fabricated through the addition of a hydrophilic pH-responsive release material (BTA-CaCO 3 @TA microspheres) into a waterborne epoxy resin coating. The electrochemical impedance spectroscopy results indicated that BTA-CaCO 3 @TA microspheres could endow the coating with long-term corrosion protection. The |Z| f =0.01Hz values of the BTA-CaCO 3 @TA coating after 130 days of immersion were still higher than those of the pure waterborne epoxy resin coating at the beginning of immersion. The excellent long-term protection performance was related to the good dispersibility of BTA-CaCO 3 @TA microspheres in the waterborne coatings, the TA conversion film and the BTA inhibitor protection film, which formed on the steel surface in situ. This synergistic strategy demonstrated its future application for protecting metals from corrosion.
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Small
·
2021
·Vol. 18
·期 9
·2105465
·
IF 13.281
Jiayu Xiao,Luo Hai,Yaoyao Li,Huan Li,Minhui Gong,Zefeng Wang,Zifeng Tang,Le Deng,Dinggeng He
Nanozyme-based chemodynamic therapy (CDT) for fighting bacterial infections faces several major obstacles including low hydrogen peroxide (H 2 O 2 ) level, over-expressed glutathione (GSH) in infected sites, and inevitable damage to healthy tissue with abundant nonlocalized nanozymes. Herein, a smart ultrasmall Fe 3 O 4 -decorated polydopamine (PDA/Fe 3 O 4 ) hybrid nanozyme is demonstrated that continuously converts oxygen into highly toxic hydroxyl radical (•OH) via GSH-depleted cascade redox reactions for CDT-mediated bacterial elimination and intensive wound disinfection. In this system, photonic hyperthermia of PDA/Fe 3 O 4 nanozymes can not only directly damage bacteria, but also improve the horseradish peroxidase-like activity of Fe 3 O 4 decorated for CDT. Surprisingly, through photothermal-enhanced cascade catalytic reactions, PDA/Fe 3 O 4 nanozymes can consume endogenous GSH for disrupting cellular redox homeostasis and simultaneously provide abundant H 2 O 2 for improving •OH generation, ultimately enhancing the antibacterial performance of CDT. Such PDA/Fe 3 O 4 can bind with bacterial cells, and reveals excellent antibacterial property against both Staphylococcus aureus and Escherichia coli . Most interestingly, PDA/Fe 3 O 4 nanozymes can be strongly retained in infected sites by an external magnet for localized long-term in vivo CDT and show minimal toxicity to healthy tissues and organs. This work presents an effective strategy to magnetically retain the therapeutic nanozymes in infected sites for highly efficient CDT with good biosafety.
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CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Qiang Huang,Xinxin Li,Pengpeng Zhang,Shichao Zhang,Yahua Liu,Peng Cui,Jin Ran
Transition metal dichalcogenide (TMD) derived stratiform membranes exhibit sub-nanometer scale interlayer distances and exceptional anti-swelling property in water environments but they are frustrated in ion rejections. Herein, the in-plane regulating concept to improve ion exclusion of TMD laminates was proposed. We demonstrate this concept using flexible and hydrophilic polyvinyl alcohol (PVA) polymers as the intercalators to implant TMDs. The resulting TMD/PVA membranes show obviously decreasing ion permeation. Taking the TaS 2 /PVA membrane as an example, its monovalent, divalent and trivalent ion transport rates reduce by 87, 131 and 168 times respectively compared with the pristine TaS 2 membrane. Additionally, the ion permeation behaviors of TMD/PVA membranes reveal long-term and cyclic stability. For the practical desalination process under the forward osmosis mode, the TaS 2 /PVA membrane shows an extraordinarily high water flux of 3.9 L m −2 h −1 together with a promising NaCl rejection of 98.7%, which is superior to the existing two dimensional membranes.
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