Advanced Healthcare Materials
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2023
·
IF 10
Xiaohu Zhou,Tiantian Chen,Tengda Ma,Lizhao Yan,Haojie Wei,Shuang Liu,Zhiyin Dai,Zhizhong Xie,Jun Deng,Shengxiang Tao,Lihong Fan,Yingying Chu
Bacterial infection is a critical factor in wound healing. Due to the abuse of antibiotics, some pathogenic bacteria have developed resistance. Thus, there is an urgent need to develop a non-antibiotic-dependent multifunctional wound dressing for the treatment of bacteria-infected wounds. In this work, a multifunctional AOCuT hydrogel embedded with CuS@TA-Fe nanoparticles (NPs) through Schiff base reaction between gelatin quaternary ammonium salt – gallic acid (O-Gel-Ga) and sodium dialdehyde alginate (ADA) along with electrostatic interactions with CuS@TA-Fe NPs is prepared. These composite hydrogels possess favorable injectability, rapid shape adaptation, electrical conductivity, photothermal antimicrobial activity, and biocompatibility. Additionally, the doped NPs not only impart fast self-healing properties and excellent adhesion performance to the hydrogels, but also provide excellent peroxide-like properties, enabling them to scavenge free radicals and exhibit anti-inflammatory and antioxidant capabilities via photothermal (PTT) and photodynamic (PDT) effects. In an S. aureus infected wound model, the composite hydrogel effectively reduces the expression level of wound inflammatory factors and accelerates collagen deposition, epithelial tissue, and vascular regeneration, thereby promoting wound healing. This safe and synergistic therapeutic system holds great promise for clinical applications in the treatment of infectious wounds.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yanjun Pang,Xinxin Luan,Kefeng Zhang,Yuxiang Liu,Lu Li,Congxia Xie,Jinhui Pang
In this study, we have successfully prepared a freeze-resistant conductive hydrogel with a fast polymerization rate and excellent mechanical and adhesive properties. In this paper, hydrogels capable of rapid polymerization in a short time were prepared based on the TA@WSCA-Zn (WSCA, water-soluble cellulose acetate; TA@WSCA, tannic acid-coated WSCA suspension; TA@WSCA-Zn, a certain amount of zinc chloride (ZnCl 2 ) was added to TA@WSCA suspension;) autocatalytic system at room temperature or low temperature. TA@WSCA-Zn forms a stable reversible quinone-catechol redox reaction to activate the decomposition of ammonium persulfate (APS, initiator) to produce SO 4 −· radicals, which triggers the ultra-fast polymerization of amphoteric ([2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl), SBMA) and acrylic monomers (AA). To improve the frost resistance and electrical conductivity of the hydrogels, we also introduced amphoteric ions, which can provide migration channels for Zn 2+ and greatly increase the migration rate. The TA@WSCA-7.5/PSA hydrogel (PSA, hydrogel prepared by polymerization of acrylic acid and SBMA as monomers;) can achieve tensile strength and toughness of 1.33 MPa and 4.89 MJ m −3 . It can provide excellent electrical conductivity and interfacial adhesion over a temperature range of 25 to −60 °C. In addition, the supercapacitor assembled from the TA@WSCA-7.5/PSA hydrogel electrolyte still has good capacitance characteristics after folding and 10,000 charge/discharge cycles, with a capacitance retention of 93.33 % and an excellent cycle life. This autocatalytic system provides a new strategy and approach for the preparation of freeze-resistant conductive hydrogel electrolytes.
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Small Methods
·
2023
·Vol. 7
·期 8
·2300054
·
IF 12.4
Lu Chen,Youbing Li,Kun Liang,Ke Chen,Mian Li,Shiyu Du,Zhifang Chai,Michael Naguib,Qing Huang
Two-dimensional (2D) transition metal carbides and/or nitrides, MXenes, are prepared by selective etching of the A-site atomically thin metal layers from their MAX phase precursors. High entropy MXenes, the most recent subfamily of MXenes, are in their infancy and have attracted great interest recently. They are currently synthesized mainly through wet chemical etching of Al-containing MAX phases, while various MAX phases with A-sites elements other than Al have not been explored. It is important to embody non-Al MAX phases as precursors for the high entropy MXenes synthesis to allow for new compositions. In this work, it is reported on the design and synthesis of Ga-containing medium/high entropy MAX phases and then their corresponding medium/high entropy MXenes. Gallium atomic layer etching is carried out using a Lewis acid molten salt (CuCl2). The as-prepared (Ti 1/4 V 1/4 Nb 1/4 Ta 1/4 ) 2 CT x exhibits a Li + specific capacity of ≈400 mAh g −1 . For (Ti 1/5 V 1/5 Nb 1/5 Ta 1/5 Mo 1/5 ) 2 CT x a specific capacity of 302 mAh g −1 is achieved after 300 cycles, and high cycling stability is observed at high current densities. This work is of great significance for expanding the family members of MXenes with tunable chemistries and structures.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Hongri Wan,Teng Chen,Ya Lu,Xin Li,Fei Yu,Yunwei Ma,Zhaojian Gao
Porous materials with excellent mechanical stability and robust superhydrophobic performance exhibit promising prospect for practical applications in the field of oil−water separation. The construction of superhydrophobic surfaces typically involve two individual steps, including increase surface roughness and decrease surface energy. Unlike traditionally approach, the superhydrophobic performance of modified PU sponge can be accomplished by one−pot approach, which does not require complicated processing procedures or specific equipment. The present study successfully developed a superhydrophobic porous PU sponge using a facile and cost−effective one−pot approach by employing tannic acid (TA), 3–aminopropyltriethoxysilane (APTES), and octadecyltrimethoxysilane (ODTS) as superhydrophobic modifiers. The water contact angle of the modified PU sponge was determined approximately 152.3 °, suggesting its superhydrophobic characteristic. The modified PU sponge showed remarkable environmental tolerance when subjected to a wide pH range of acidic and alkaline solutions. The WCAs remained consistently above 150°, indicating its durability and stability against harsh circumstances. The superhydrophobic PU sponge also demonstrated remarkable of self−cleaning and antifouling capacities. The obtained sponge exhibited an impressive selective oil adsorption capacity from oil−water mixtures, ranging from 18.7 to 88.4 times of its initial mass, depending on the specific type of oil utilized in the test. The sponge still maintained its excellent adsorption capacity even after 20 cycles of adsorption–squeezing experiment. Immiscible oil−water mixtures with different densities could also be highly effectively separated by the superhydrophobic PU sponge in a continuous way. The separation efficiencies for diesel/water and chloroform/water were determined to be 98.5 % and 99.5 %, respectively, demonstrating outstanding levels of continuous separation effectiveness. With the readily available PU sponge as substrate material and the simple modification process, this work could provide a potential pathway for fabrication of cost−effective, long durable, and high efficient superhydrophobic materials in oil/water separation.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Liping Rong,Xiaohui Fan,Gang Wang,Huanhuan Li,Dayong Zhang,Danni Luo,Sheng Li,Zhiguo Li
Improving the bond strength of wood emulsion adhesives is an ongoing challenge for the wood-processing industry. In this study, PVAc/PS core-shell emulsion particles are functionalized by forming coordination complexes between natural biomaterial tannic acid (TA) and Fe 3+ . The functionalized emulsion particles are assembled on the surface of the core template SiO 2 to form a “superstructure” through hydrogen bonding between the phenolic hydroxyl groups in the TA and the hydroxyl groups on the surface of SiO 2 , which can enhance the cohesive strength of the emulsion adhesive layer, thereby increasing the peel strength of wood adhesives. The results indicated that the functionalized emulsion particles were most effectively assembled on core template SiO 2 particles when the ratio of TA to Fe 3+ was 1:1 and the encapsulation rate of the assembled SiO 2 particles was 150 %. The glass transition temperatures (Tg1 and Tg2), storage modulus, tensile strength, and hardness of the assembled PVAc/PS emulsion film were measured by DSC, DMA, tensile testing machine, and durometer. These properties increased by 11.6 %, 5.3 %, 14.9 %, 127.6 %, and 46.3 %, respectively, compared to those of the PVAc/PS emulsion film. Further, the shear strength of the assembled PVAc/PS emulsion for bonding wood blocks and the peel strength for bonding thin veneers increased by 33.8 and 35.7 %, respectively, compared to those of the PVAc/PS emulsion. This study confirmed that using a modular assembly to improve PVAc/PS emulsion bonding properties can help formulate high-performance waterborne emulsion adhesives with promising applications in the field of thin-wood veneer bonding. This strategy provides an effective method to design and build environmentally friendly, low-cost, and high-performance water-based emulsion adhesives.
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MINERALS ENGINEERING
·
2025
·
IF 5
Jiaozhong Cai,Shuiping Zhong,Jiushuai Deng,Bozeng Wu,Chengyan Xu,Xiaopeng Chi,Guangsheng Zeng,Wei Weng,Wen Tan,Junnan Chen
Talc is a layered silicate mineral with pronounced crystal anisotropy, consisting of a basal (001) surface and an edge (100) surface, which complicates its separation from valuable minerals. In this study, tannic acid (TA) was used as a depressant, and its adsorption behaviors on the two representative surfaces of talc—silica (basal plane surface) and magnesium silicate (edge surface)—were systematically investigated using experimental methods and molecular simulations. TA addition reduced the contact angles of the talc basal and edge surfaces by 30.5° and 22.7°, respectively, indicating enhanced hydrophilicity. ToF-SIMS analysis revealed that TA physically adsorbs onto the silica surface, while both physical and chemical interactions occur on the magnesium silicate surface. AFM showed lumpy adsorbate on the silica surface and point-like adsorbate on the magnesium silicate surface, with a greater roughness change observed for the former. QCM-D measurements confirmed that TA formed a multilayer flexible adsorbate on the silica surface and a dense, rigid monolayer on the magnesium silicate surface. Molecular dynamics simulations further revealed that van der Waals interactions dominated TA adsorption on the (001) surface, while electrostatic interactions prevailed on the (100) surface. These findings provide insight into the selective depression mechanism of talc and offer guidance for the depression of other layered silicate minerals.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Chen Liu,Mengjiao Yan,Kangying Guo,Yue Gao,Fang Liu,Baoyu Gao
Membrane fouling is a serious problem that limits the widespread application of membrane technology. Herein, we propose an effective modification method by in-situ modifying polyethersulfone (PES) ultrafiltration membrane with tannic acid (TA) and Fe 3+ chelates to improve its pollution resistance. The TA-Fe 3+ complexes could deposit on the PES membrane surface and form a hydration layer by Van Der Waals force, hydrogen bonding force, and hydrophobic association. The modified membrane (PES\TA\Fe 3+ ) had enhanced fouling resistance and membrane flux due to its dual advantages of abundant OH groups and favorable spatial structure. After modification, the roughness of membrane surface increased from 219 nm to 257 nm, and its water contact angle decreased from 58.9° to 26.5°, endowing the PES\TA\Fe 3+ membrane with a strong resistance to oil droplets through electrostatic repulsion, steric hindrance effect, and hydrogen bonding force. Polyaluminum chloride-polydimethyldiallylammonium chloride (PAC-PDMDAAC) could alleviate 85 % membrane fouling resistance. PAC-PDMDAAC mainly mitigated irreversible membrane fouling by removing oil droplets and forming large and loose flocs. While the use of PES\TA\Fe 3+ membrane mainly reduced the adsorption resistance and the resistance of membrane itself. The anti-fouling performance of PES\TA\Fe 3+ membrane changed with pH owing to the changes in the properties of TA-Fe 3+ complexes. The hydrophilic layer would be decomposed under alkaline conditions due to the deprotonation of TA and excessive hydrolysis of Fe 3+ . This study provides an efficient anti-fouling strategy and reveals the modification and anti-fouling mechanisms of the hydrophilic membrane, providing theoretical guidance for the further development of membrane technology.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Yixuan Wang,Xingxiang Zhang,Xuhuan Yan,Na Han
Polyphenylene sulfide (PPS) membrane materials have attracted significant attention for separating oily wastewater due to their remarkable separation precision and permeation capability. Nevertheless, the inherent hydrophobic characteristics result in a single wetting property, which restricts their broad applicability in treating diverse types of oily wastewater. In this study, the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes exhibit outstanding under-liquid dual superlyophobicity, which were formed via constructing a composite coating containing polyphenol-polycation and calcium alginate (CaAlg) hydrogel, and assembling ZIF-8 nanocrystals with suitable surface chemistry. Through the solvent pre-wetting approach, the surface wettability of the PPS composite membranes can be flexibly transitioned between under-water superoleophobicity and under-oil superhydrophobicity, thus realizing on-demand separation of oily wastewater. It is noteworthy that the treatment efficiency of the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes for the various oil-water mixtures (surfactant-free) and emulsions (stabilized by surfactants) attained greater than 98.1%. Meanwhile, the rapid transport capability of diverse types of oil-water emulsions can also be exhibited, with a permeance of 1652.4 L m -2 h -1 bar -1 for water-in-oil (W/O) emulsions and 2087.5 L m -2 h -1 bar -1 for oil-in-water (O/W) emulsions. In addition, the PPS composite membranes demonstrated outstanding anti-fouling capacity, recyclability, and switchable separation capacity. This work extended the utilization of the PPS membrane material in the controllable treatment of oily wastewater.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2025
·
IF 8
Yueshu Lu,Yuqing Li,Wenqiang Yang,Kaiyuan Ma,Yanfeng Zhang,Lingyan Zhu
As a widely used alternative to the conventional per- and polyfluoroalkyl substances (PFAS) of perfluorooctanoic acid (PFOA), hexafluoropropylene oxide trimer acid (HFPO-TA) is of growing concern due to its toxicity and potential risks to human health. Water quality criteria of HFPO-TA for protecting human health were established, and 412 ng/L was set as the maximum concentration level for groundwater ( MCL gw ) to calculate the soil control value to protect groundwater ( CVS pgw ). Utilizing recommended default values for the properties of HFPO-TA and the soil, the generic CVS pgw value of 24.0 μg/kg was obtained. Subsequently, column experiments were conducted to investigate the transport of HFPO-TA in the site soil of a fluorochemical industrial park (FIP) in China. The resulted retardation factor ( R ) was applied to derive the site-specific CVS pgw , and a value of 2.48 μg/kg was obtained. Using the experimentally measured R instead of the default empirical values reduced the uncertainties in deriving the CVS pgw dramatically. The transport of 13 PFAS in the soil as a mixture was investigated and revealing a significant linear correlation between R and organic carbon-water partition coefficient ( K OC ) ( r 2 = 0.991, p < 0.01), which was utilized to predicted R values for PFAS compounds. Comparison to the site-specific CVS pgw , HFPO-TA in the soil near the FIP may pose a risk to the groundwater quality. HFPO-TA concentrations in the groundwater of certain areas around the FIP were higher than MCL gw and not recommended for directly consumption, while HFPO-TA in the tap water was at the safe level.
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Materials Horizons
·
2025
·
IF 10.7
Menglong Gao,Yao Guo,Shiding Zhang,Yinghui Xue,Jianxin Li,Shuaishuai Hu,Haixiang Song,Kaidi Wu,Miaomiao Li,Huihui Zhao,Zhongyuan Zhou,Qing Shen
We study the interface properties of CsPbBr3/Nb2O5 and CsPbBr3/Ta2O5 heterojunctions for structural, electronic, and optical characteristics. First-principles calculations were performed to analyze interfacial binding energy, electronic local function (ELF), charge density difference, and electrostatic potential. Four interface configurations were constructed based on CsPbBr3 (100) and M2O5 (001) terminations, revealing that the PbBr/TaO interface exhibits the highest binding energy (0.0073 eV Å−2), indicating superior stability. Charge transfer calculations demonstrate electron migration from CsPbBr3 to M2O5, forming an internal electric field that promotes charge separation. ELF and charge density difference maps highlight strong covalent interactions at the interfaces, particularly in the PbBr/TaO interface. Experimental characterization via XRD, SEM, TEM and XPS confirms successful heterojunction formation with preserved crystallinity. These findings provide theoretical and experimental insights into optimizing M2O5-based electron transport layers to enhance PSC efficiency and stability.
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高影响因子
APPLIED OPTICS
·
2022
·Vol. 61
·期 34
·10065-10071
·
IF 1.905
Jing-Ru Zhao,Jing-Ru Zhao,Zhen-Jie Wu,Gui-Qiang Wang,Chun-Nan Wang,Bo-Fu Deng,Shu-Qing Sun
A total internal reflection system based on the weak value amplification principle is set up for the precise measurement of the thickness of an ultra-thin film. In this system, the film thickness is derived from the change of the double-peak pointer caused by the effective refractive index of the film, which is correlated to its thickness. The sensitivity and resolution of this system reached 2727.21 nm/RIU and ${7.2} \times {{10}^{- 6}}\;{\rm RIU}$, respectively, determined by using a sodium chloride solution with a refractive index of 1.331911. The growth process of TA/Fe(III) assembled films with thicknesses in the few nanometers range is monitored using the as-set-up system, and the experimental results are consistent with a theoretical calculation based on the Maxwell Garnett effective medium. Additionally, we theoretically calculated the detection limit for the thickness measurement of the film as 22 pm. We clearly provide a potential method for the precise measurement of the thickness of an ultra-thin film.
研究领域:
光学
·
材料科学
·
物理学
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiping Zhao,Youlong Xu,Shiheng Liu,Xiangdong Ding
Adsorption of oxygen-containing species on the surface of tantalum (Ta) electrode significantly affects its electrochemical corrosion behavior. Density-functional theory (DFT) is employed to investigate the adsorption energies, structural properties and electronic structures of atomic oxygen (O) and molecular water (H 2 O) on Ta (1 1 0) surface. The adsorption behavior of H 2 O at room temperature is also studied based on ab initio molecular dynamics (AIMD). We find the passivation of Ta metal is mainly attributed to the strong adsorption of oxygen atoms. Thermodynamic results show that bulk Ta 2 O 5 is easily formed at room temperature, which is the fundamental reason for the spontaneous passivation of Ta (1 1 0) surface. The formation of an oxygen monolayer (1.00 ML) on Ta (1 1 0) surface dramatically increases the work function, making the equilibrium potential of Ta electrode move in the positive direction, thus slowing down the corrosion rate of Ta metal. However, the adsorption of H 2 O causes a negative work function change, which promotes its anodic dissolution. The electrochemical impedance spectra (EIS) of tantalum foil in three different NH 4 F-methanol electrolytes (pure, 0.01 M water and oxygen saturated) shows that the charge transfer resistance increases in the sequence R H2O < R pure < R oxygen , which can be well explained by the results of DFT calculations.
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