APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Yiming Liu,Qiang Tian,Yuhan Chen,Tianyi Guo,Yanjuan Zhang,Zuqiang Huang,Huayu Hu,Tao Gan
The 1 O 2 -dominated radical pathway is highly active for the complex aquatic environments, but the 1 O 2 generation with high efficiency and selectivity is difficult. Herein, iron single-atom catalysts (SACs) supported on graphitized chitin-derived carbon (Fe 1 /NC-700) are synthesized by ball milling combined with high-temperature pyrolysis method using chitin as a carbon and nitrogen source. Fe 1 /NC-700 exhibits excellent catalytic performance and satisfactory stability in the activation of peroxymonosulfate (PMS) for the degradation of acid orange 7 (AO7), the degradation efficiency is 99.8 % within 5 min, and its apparent rate constant k can reach 0.5695 min −1 , which is 3 times higher than that of Fe NPs /NC-700. Free radical scavenging experiments, electron spin resonance, in-situ Raman spectroscopy , and electrochemical analyses demonstrate that the degradation process is a 1 O 2 -dominated non-radical pathway with the auxiliary participation of Fe(IV)=O and electron transfer , the 1 O 2 selectivity is 96.2 %, while Fe(IV)=O and e – are 3.8 %, causing Fe 1 /NC-700 + PMS system exhibits superior anti-interference ability. The reaction mechanism shows that pyrrolic N is the adsorption sites for pollutants, whilst Fe-N x and graphite N are the activation sites for PMS, meanwhile, the graphite N can facilitate the transfer of electron, resulting in the production of large amounts of 1 O 2 for the degradation process.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Subramani Kandhasamy,Baofang Wu,Jiayin Wang,Xiaojing Zhang,Gao Hongzhi,Da-Peng Yang,Yiming Zeng
Hydrogels incorporating natural biopolymer and adhesive substances have extensively been used to develop bioactive drugs and to design cells encapsulating sturdy structure for biomedical applications. However, the conjugation of the adhesive in most hydrogels is insufficient to maintain long-lasting biocompatibility inadequate to accelerate internal organ tissue repair in the essential native cellular microenvironment. The current work elaborates the synthesis of charged choline-catechol ionic liquid (BIL) adhesive and a hydrogel with an electronegative atom rich polyphenol (PU)-laden gelatinmethacryloyl (GelMA) to improve the structural bioactivities for in vivo tracheal repair by inducing swift crosslinking along with durable mechanical and tissue adhesive properties. It was observed that Bioactive BIL and PU exhibited potent antioxidant (IC 50 % of 7.91 μg/mL and 24.55 μg/mL) and antibacterial activity against E. coli , P. aeruginosa and S. aureus . The novel integration of photocurable GelMA-BIL-PU revealed outstanding mechanical strength, biodegradability and sustained drug release. The in vitro study showed exceptional cell migration and proliferation in HBECs, while in vivo investigation of the GelMA-BIL-PU hydrogel on a rat's tracheal model revealed remarkable tracheal reconstruction, concurrently reducing tissue inflammation. Furthermore, the optimized GelMA-BIL-PU injectable adhesive bioink blend demonstrated superior MSCs migration and proliferation, which could be a strong candidate for developing stem cell-rich biomaterials to address multiple organ defects.
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PubMed
高影响因子
Chemistry-Switzerland
·
2024
·Vol. 6
·期 4
·506-516
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IF 2.4
Xinmiao Xu,Yi Zhang,Yong Chen,Yu Liu
Traditional separation membranes used for dye removal often suffer from a trade-off between separation efficiency and water permeability. Herein, we propose a facile approach to prepare cyclodextrin-based high-flux nanofiber membranes by electrospinning and vapor-driven crosslinking processes. The application of glutaraldehyde vapor for crosslinking hydroxypropyl-β-cyclodextrin (HP-β-CD)/polyvinyl alcohol (PVA)/laponite electrospun membranes can build interconnected structures and lead to the formation of a porous hierarchical layer. In addition, the incorporation of inorganic salt, laponite, can alter the crosslinking process, resulting in membranes with improved hydrophilicity and highly maintained electrospun nanofibrous morphology, which contributes to an ultrafast water flux of 1.0 × 105Lh−1m−2bar−1. Due to the synergetic effect of strong host–guest interaction and electrostatic interaction, the membranes exhibit suitable rejection toward anionic dyes with a high removal efficiency of >99% within a short time and achieve accurate separation for cationic against anionic dyes, accompanied by suitable recyclability with >97% separation efficiency after at least four separation–regenerations. The prepared membranes with remarkable separation efficiency and ultrafast permeation properties might be a promising candidate for high-performance membranes in water treatment.
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Bioactive Materials
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2024
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IF 18
Ying Qi,Chenyu Xu,Zhuodan Zhang,Qian Zhang,Ziyang Xu,Xinrui Zhao,Yanhong Zhao,Chunyan Cui,Wenguang Liu
Periodontitis, a common chronic inflammatory disease caused by pathogenic bacteria, can be treated with diverse biomaterials by loading drugs, cytokines or proteins. However, these biomaterials often show unsatisfactory therapeutic efficiency due to their poor adhesion, short residence time in the wet and dynamic oral cavity and emerging drug resistance. Here we report a wet-responsive methacrylated gelatin (GelMA)-stabilized co-enzyme polymer poly(α-lipoic acid) (PolyLA)-based elastic patch with water-induced adhesion and softening features. In PolyLA-GelMA, the multiple covalent and hydrogen-bonding crosslinking between PolyLA and GelMA prevent PolyLA depolymerization and slow down the dissociation of PolyLA in water, allowing durable adhesion to oral periodontal tissue and continuous release of LA-based bioactive small molecule in periodontitis wound without resorting external drugs. Compared with the undifferentiated adhesion behavior of traditional adhesives, this wet-responsive patch demonstrates a favorable periodontal pocket insertion ability due to its non-adhesion and rigidity in dry environment. In vitro studies reveal that PolyLA-GelMA patch exhibits satisfactory wet tissue adhesion, antibacterial, blood compatibility and ROS scavenging abilities. In the model of rat periodontitis, the PolyLA-GelMA patch inhibits alveolar bone resorption and accelerates the periodontitis healing by regulating the inflammatory microenvironment. This biomacromolecule-stabilized coenzyme polymer patch provides a new option to promote periodontitis treatment.
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ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yage Sun,Xinrui Zhao,Rong Yang,Meng Xiao,Wenguang Liu
Anti-epilepsy drugs (AEDs), a common therapeutic approach for clinically treating epilepsy, suffer from low permeability toward the blood-brain barrier (BBB), side effect risks, and a failure to regulate the pathological microenvironment. These issues hinder the complete control of epilepsy and lead to a vicious cycle of inflammation-epileptogenesis. Herein, an α-lipoic acid (LA)-based nanozyme that loads phenytoin (PHT) and complexes calcium ions (LA@PHT-Ca 2+ ) is developed. This nanozyme combines the functions of delivering AEDs across the BBB and regulating undesirable microenvironments to treat epilepsy. Amphipathic LA self-assembles into stable nanoparticles in water with BBB crossing ability endowed by the transporting of LA through sodium-dependent multivitamin transporter. LA's enzyme-like and redox functions provide LA@PHT-Ca 2+ with excellent scavenging effects on several free radicals via cascade reactions, thereby protecting neurons from oxidative stress. Moreover, Ca 2+ disrupts neuronal respiration, resulting in reduced production of bioenergetic adenosine triphosphate and an improved hypoxic microenvironment. This leads to decreased expression of P-glycoprotein, a drug-efflux gating protein. This novel lipoic acid-based nanozyme, with intrinsic BBB crossing capability, prolonged intracellular drug retention time, and the ability to block the inflammation-epileptogenesis cycle, presents a satisfactory therapeutic effect in epileptic rats, resulting in attenuated symptoms and an improved microenvironment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Tianyue Zhao,Ran Wang,Shengnan Wei,Lexin Zhang,Zhiwei Liu,Mingli Wang,Tifeng Jiao
In this work, the self-assembled films of sericin protein (SP), silk fibroin (SF), and dye molecules were prepared by the Langmuir-Blodgett (LB) technique. Surface-enhanced Raman scattering (SERS) experiments demonstrated that the SP/saffron T (ST)-80 and SF/ST-60 composite LB films exhibited good Raman enhancement characteristics with enhancement factors (EFs) of 5.74×10 4 and 7.05×10 4 , respectively. The relative standard deviations (RSDs) of Raman intensity were 7.19% and 18.40%, respectively, confirming the uniformity of the composite LB films. Furthermore, photoelectric conversion efficiencies indicate that the electrodes fabricated from SP/ST and SF/ST film electrodes have high carrier rates and good photocurrent generation properties. This study provides novel insights into the fabrication of multifunctional SP/dye and SF/dye composite LB films, demonstrating their potential applications in SERS and photovoltaic conversion.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xiujuan Liu,Na Li,Tianyue Zhao,Qing Li,Zihe Lu,Ze Chen,Bo Feng,Tifeng Jiao
The Langmuir-Blodgett (LB) technique can be used to obtain highly ordered arrangement and assembly of high polymer molecular chains , and the obtained LB films exhibit the controllable structures and special physicochemical properties . Here, we successfully prepared the composite LB films based on bisphenol fluorene (BPF) and epoxy bisphenol fluorene (DGPF) by LB technique, as well as explored the microstructures of the composite LB films by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The different aggregation states of various dye molecules in the composite LB films are investigated by UV–vis. Interestingly, the composite LB film electrodes exhibit promising photoelectrochemical properties. In particular, BPF/MB and DGPF/MB LB films show better photoelectric conversion efficiency. It is attributed to the ordered arrangement of BPF and DGPF and their effective aggregation with dye molecules, which improves the light absorption ability and charge transfer efficiency of the materials. Therefore, the prepared LB films based on the synthetic polymers BPF and DGPF are expected to play an important role in microelectronics.
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