JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2025
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IF 3.6
Xiaoguang Liu,Qi Lin,Yi Zhong,Yanling Li,Ji’e Zhang,Yuhua Zhan,Yijia Sun,Ruixia Hou
Catheter-associated urinary tract infections (CAUTIs), the most prevalent hospital-acquired infections globally, remain unresolved despite the development of antimicrobial catheters incorporating silver or antibiotics. To address this challenge, a quaternized chitosan (HTCC)-functionalized catheter was developed through oxygen plasma activation of polyvinyl chloride (PVC) surfaces, followed by polydopamine (PDA) coating and HTCC grafting. This process improves the hydrophilicity of the PVC surface, which is beneficial for reducing urethral mucosal damage in patients, inhibiting the formation of bacterial biofilms, reducing friction and improving patient comfort. This approach eliminated the need for potentially toxic silver nanoparticles and the issue of antibiotic resistance while enhancing surface hydrophilicity. The modified catheter demonstrated superior antibiofilm and antimicrobial efficacy against key uropathogens, including Staphylococcus aureus and Escherichia coli, compared to commercial PVP-urea coated PVC catheters. With its combined advantages in surface wettability, antimicrobial performance, and biocompatibility, this HTCC-based design presents a promising solution for CAUTI prevention and establishes a new paradigm for medical device coatings.
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ACS Applied Nano Materials
·
2025
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IF 5.5
Yue Wang,Aofeng Yang,Lihao Xiong,Jiayi Song,Sihan Chen,Huang Zhou,Le Li,Deshuai Zhen
Uranium, a radioactive element, exists in aqueous environments primarily as uranyl ions (UO22+), posing significant risks to human health and the environment. Detecting UO22+ in such environments remains challenging. Here, an upconversion fluorescent sensor (UCDM) for the detection of UO22+ in an aqueous environment was constructed based on the fluorescence resonance energy transfer (FRET) principle. This sensor utilizes upconversion nanoparticles loaded with DNAzyme (UCDA) as energy donors and molybdenum disulfide (MoS2) as energy acceptors. MoS2 exhibits a high affinity for single-stranded DNA (ssDNA), enabling the sensor to function effectively. In the presence of UO22+, DNAzyme catalyzes substrate cleavage at the rA site, releasing ssDNA that binds to MoS2. This interaction leads to a decrease in UCDA upconversion luminescence. The unique upconversion luminescence property of an upconversion nanoparticle minimizes background autofluorescence, enhancing sensitivity. The sensor achieves a low detection limit of 5.81 nM and demonstrates robust recoveries (98.7%–102.7%) in complex aqueous matrices such as Xiangjiang water, uranium mine wastewater, human serum, and urine samples, underscoring its practical applicability.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Yingying Li,Guangyao Zhang,Deqi Fan,Zongze Li,Yi Lu
Achieving efficient and selective solar-driven CO2 reduction remains a grand challenge due to sluggish proton–electron transfer kinetics and limited reactant availability at catalytic interfaces. Herein, we present a hierarchically structured aerogel integrating triazine-based covalent organic frameworks (TCOF) with Nb2CTx MXene nanosheets embedded in a poly(vinyl alcohol)/sodium alginate (PVA/SA) matrix. The aerogel leverages broadband light harvesting, hierarchical water regulation, and localized photothermal activation to enhance multielectron CO2 conversion. The hydrophilic–hydrophobic PVA/SA scaffold promotes rapid water uptake and vapor-phase transport, while Nb2CTx enables efficient near-infrared-induced heating to establish a proton-rich interfacial microenvironment. Simultaneously, the porous TCOF network offers abundant CO2 adsorption and activation sites. This synergistic architecture facilitates stable proton-coupled electron transfer (PCET) pathways and C–C coupling. In situ spectroscopic analyses reveal enhanced formation and stabilization of *COOH, *CH3, and *OCCHO intermediates under photothermal conditions, evidencing facilitated C–C coupling for C2 product generation. Under 3-sun irradiation for 3 h, the optimized TCOF/Nb2CTx aerogel delivers exceptional yields of 119.3 μmol·g–1 CH4 and 94.9 μmol·g–1 C2H4, which is 2-fold higher than powder analogues and surpassing previous COF/MXene systems. This work demonstrates a generalizable strategy to engineer carbohydrate polymer-based aerogels with integrated light-to-heat conversion, vapor regulation, and catalytic site accessibility for efficient solar-to-chemical fuel generation.
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Chemical Science
·
2025
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IF 7.4
Yuanming Wang,Jinlong Wu,Jiayue Dong,Xiaoxu Xu,Huan Song,Libei Yuan,Xiaolong Li,Zhaoqing Lu
Flexible microsupercapacitors are attracting much more attention for use in miniature energy storage devices due to their attractive electrochemical characteristics. However, it is difficult to achieve high energy density and long-term stability at the same time due to a lack of suitable high-specific-energy materials. Herein, an innovative asymmetric microsupercapacitor is obtained by the highly efficient surface chemistry regulation of conductive two-dimensional nanosheets of both graphene and MXene with highly active covalent groups. To optimize the positive graphene material, graphene oxide powder is first employed, undergoing a fast expansion and exfoliation process via water molecule explosive vaporization. Then, the conductive graphene sheet layer with a high specific surface area is oxidized selectively by acid treatment to introduce pseudocapacitive groups at an optimized proportion and density (more –COOH and less –OH), and this is labelled as expanded-and-oxidized graphene (EOG). To optimize the negative MXene material, delaminated MXene nanosheets undergo hydroxyl substitution through alkalization, and the two-dimensional (2D) lamellae become wrinkled using coulombic attraction for fast intercalation pseudocapacitance, and this is labelled as wrinkled-and-hydroxylated MXene (WOM). Through surface chemistry modification and all-pseudocapacitive 2D structure design, flexible EOG and WOM composite electrodes exhibit capacities of 382 F g−1 and 550 F g−1, respectively, and have remarkable stability. An assembled proton-type solid-state microsupercapacitor with a voltage window of 1.5 V readily achieves an energy density of 47.25 mW h cm−3 (23.62 W h kg−1) at a power density of 1900.55 mW cm−3 (950.27 W kg−1), with high capacity retention of 86.8% after 8000 cycles. This work shows a well-designed microdevice with flexible and integrable properties based on 2D microstructure engineering for use in flexible electronics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Chenhui Yan,Bowen Zhang,Xing Ai,Chunping Xie,Tao Wang,Jinglin Huang,Guo Chen,Xiaoshan He,Yansong Liu,Zhibing He
Radioiodine anions (I and IO 3 ) pose a serious threat to the environment and human health due to their high radioactivity and solubility. Therefore, it is important to develop efficient and economical adsorbent materials for radioiodine anions. In this work, combined with the excellent properties of chitosan (CS) and (3-acrylamidopropyl) trimethylammonium chloride (AMPTAC), a novel interpenetrating network hydrogel CS@AMPTAC was synthesized to improve the adsorption efficiency of CS hydrogel for I and IO 3 . Due to the electrostatic interaction and anion exchange ability of the quaternary ammonium group (−N + (CH 3 ) 3 Cl⁻), the introduction of AMPTAC constructs a more complex and effective adsorption sites for CS@AMPTAC. Combined with the protonated amino group (−NH 3 + ) in CS, the CS@AMPTAC showed better adsorption efficiency and anti-interference performance than CS. The CS@AMPTAC hydrogel shows excellent adsorption performance over a wide pH range (pH 2–11), which overcomes the sensitivity of traditional adsorbents to pH. Meanwhile, the maximum adsorption capacities of CS@AMPTAC for I and IO 3 are 359.9 mg/g and 312.64 mg/g, respectively, which exhibits remarkable enhancements of 246.26 mg/g and 267.34 mg/g compared to CS. In addition, based on the synergistic adsorption mechanism and the hydrophilicity of CS@AMPTAC, the hydrogel can reach adsorption equilibrium within 30 min. The synergic strategy shows great potential for application in the treatment of radioiodine anions.
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ANALYTICA CHIMICA ACTA
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2025
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IF 6
Yao Chu,Yangyang Chen,Zhen Gu,Xinyi Liu,Tao Cheng,Yichuan Shen,Jian Lv,Yiping Wu,Nan Chen,Haifeng Yang,Wanxin Tang
As an electrochemical cell and sweat reservoir, hydrogel plays a significant role in wearable sweat glucose sensing. However, the uncontrolled and randomly distributed network in the hydrogel, the aggregation of enzyme and leaching from the sensing surface often cause a concentration gradient of sweat glucose, which could lead to the distorted signal. In this study, a magnetic porous hydrogel is designed with uniformly embedded GOx. Such hydrogel is integrated with MWCNTs, CaCO 3 , and glutaraldehyde-coated magnetic nanoparticles (G-Fe 3 O 4 NPs). Acid etching of CaCO 3 forms the porous structure of hydrogel with high water absorbency. G-Fe 3 O 4 NPs provide controllable cross-linkers between GOx and hydrogel. Guided by an external magnet, GOx distribution in the hydrogel is oriented in a constant and uniform order, thus can avoid non-quasi-equilibrium and distorted glucose sensing that caused by GOx aggregation and leakage. Importantly, MG-MFPH-GOx hydrogel show enhanced sensitivity when tested for both on-body and finger sweat glucose sensing and the detection limit reaches 0.25 μmol/L. Moreover, sweat glucose sensors based on MG-MFPH-GOx hydrogel show stable performance for 30 days. Therefore, the regulated enzymatic hydrogel prepared with the facility of an external magnetic field provides a new strategy for constructing wearable sensors.
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BIORESOURCE TECHNOLOGY
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2025
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IF 9
Wenye Li,Binghan Xie,Zhipeng Li,Guoyu Zhang,Zhiying Lv,Qinghao Li,Shuyu Zhao,Mu Tong,Yuanyuan Gao,Langming Bai
The effective dewatering of waste activated sludge (WAS) and the utilization of resources are crucial for the sustainable development of wastewater treatment plants. Ultrasonic (US) collaborative iron-carbon (Fe-C) activated peroxydisulfate (PDS) coupling system was constructed to investigate the transformation of physicochemical properties and explore the mechanisms during the cracking and oxidation of WAS. The ultrasonic enhanced Fe-C/PDS system, which exhibited excellent oxidation capacity under the conditions of PDS, Fe-C, and ultrasonic power levels at 0.12 g/g TS, 0.3 g/g TS, and 0.3 W/mL. The water content of the sludge cake was reduced to 61.71 %, while the specific resistance to filtration was lowered to 1.12 × 10 12 m/kg (decreased by 88.2 %). Furthermore, ultrasonic improved the WAS cracking capacity with a satisfying SCOD production (630.64 mg/L) and a dramatic reduction of 9.16 % in volatile solids. Compared to Fe-C/PDS, the addition of ultrasonic enhanced the leaching of Fe, released carbon source and promoted the formation of various reactive oxidative species to degrade bound EPS. The contribution of O 2 − and 1 O 2 was 37.00 % and 43.17 %, indicating the oxidation process of free radicals and non-free radicals in Fe-C/PDS/US system. Additionally, the concentration of short-chain fatty acids was increased by 96.7 %, which significantly accelerating the quality of carbon source suitable for recycling. The positive improvement of sludge physicochemical properties revealed the disintegration-degradation synergistic effect of the Fe-C/PDS/US systems. These findings provide a novel strategy for effective disposal and reduction in WAS while also offering valuable insights into resource utilization.
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Food Chemistry-X
·
2025
·
IF 8.2
Henan Wei,Xiaoqun Zeng,Yangying Sun,Changyu Zhou,Qiang Xia,Zhen Wu,Hongbing Yan,Yangyang Hu,Daodong Pan
Reducing salt in reconstructed duck ham while maintaining its texture is still challenging. This study developed a novel salt-reducing strategy using lyophilized emulsion complexes of myofibrillar protein (MP) and gum Arabic (GA) (4:0, 3:1, 2:2, 1:3 and 0:4) with TGase as control. Spectroscopic analysis revealed that MP-GA complexation enhanced the protein unfolding, particularly the balanced protein/polysaccharide ratio at 3:1 (M 3 G 1 ). M 3 G 1 incorporation favored the MP association and meat integration macroscopically, increasing water holding capacity by 8.02 % and gel strength by 143.3 % versus control. Sensory and electronic tongue analysis confirmed M 3 G 1 maximized saltiness perception score (8.2) than other treated groups (7.4–7.8) and the control (5.4) through heterogeneous sodium distribution. Sodium release kinetics and porcine tongue perception further reflected that M 3 G 1 rendered prolong Na + releasing out for saltiness enhancement. Therefore, MP-GA complexes with manipulated ratio (especially M 3 G 1 ) can simultaneously enhance texture and saltiness perception, offering a promising alternative for low-sodium duck ham.
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Analytical Methods
·
2025
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IF 2.6
Zheng Chang,Zhenyuan Duan,Junpeng Li,Xiangze Meng
In this study, hemin-functionalized polyethyleneimine/silica nanoparticles (hemin/PEI/SiO2 NPs) served as an electrochemical label for ultrasensitive detection of prostate-specific antigen (PSA), a clinically important prostate cancer biomarker. A poly(thionine)/carbon nanotube (PTh/CNTs) multilayer film was fabricated on a glassy carbon electrode (GCE) via integrated electropolymerization and electrostatic layer-by-layer (LbL) assembly, forming a {PTh/CNTs}2/PTh modified GCE with abundant amino groups. PSA capture antibodies (Ab1) were then covalently immobilized on the modified electrode through glutaraldehyde (GA) crosslinking, leveraging the film's surface-exposed amino groups. Furthermore, hemin/PEI/SiO2 NPs were synthesized through amine-carboxyl interactions between carboxyl groups of hemin and amine groups of PEI/SiO2 NPs. The immunosensor assembly employed a sandwich-type electrochemical platform using PSA detection antibody (Ab2)-conjugated hemin/PEI/SiO2 NPs. The specific antibody-antigen binding enables efficient electron transfer across the nanoscale spacing (several nanometers) between hemin/PEI/SiO2 NPs and the {PTh/CNTs}2/PTh multilayer film. In this architecture, CNTs serve as excellent electron mediators, significantly facilitating electron transport. Moreover, the high-density immobilization of hemin on PEI/SiO2 NPs significantly amplifies the electrochemical redox currents of the multilayer film through proximity effects. This enhanced electrical signal enables highly sensitive detection of target protein antigen–antibody binding events. Consequently, by correlating the enhanced reduction peak current of the immunosensor with PSA concentration, highly sensitive detection of PSA at various concentrations can be achieved. Under optimized conditions, it exhibited a linear response to logarithmic PSA concentrations (0.01 pg mL−1 to 100 pg mL−1, R = 0.9963), with an ultralow detection limit of 3.0 fg mL−1 (S/N = 3). Furthermore, the immunosensor demonstrated outstanding analytical performance in human serum samples (96.0–103% recovery, n = 3), confirming its high accuracy for clinical applications.
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Desalination and Water Treatment
·
2025
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IF 1
Jingyi Chen,Chunyu Ji,Junsheng Liu,Jie Zhang
A series of new PMDA@CS/PVA composite membranes were fabricated by the crosslinking of pyromellitic dianhydride (PMDA) with chitosan (CS) and poly(vinyl alcohol) (PVA) in the presence of glutaraldehyde (GA) as a crosslinking agent. While, their adsorptions for Cu(II), Co(II), and Ni(II) in a single- and multiple mixed solutions were investigated. It was found that the incorporation of PMDA in the membranes can significantly enhance the adsorption capacity of membranes for these metals. The fitting of kinetic modeling s showed that the sorption manner of Cu(II), Co(II) and Ni(II) on the membranes obeyed the quasi-2nd kinetic modeling, indicating that it was dominated by chemisorption. The kinetic rate constants K 2 of membranes A-E for Cu(II), Co(II), and Ni(II) were in the region of 0.005–0.02, 0.026–0.082, and 0.002–0.053 [g/(h·mg)], respectively. The fitting of sorption isotherm modeling followed the Langmuir isotherm equation and the maximal Langmuir adsorption capacities for Cu(II), Co(II), and Ni(II) could reach 36.466, 32.119, and 30.916 mg/g, respectively. In addition, in the multi-component solutions, these membranes exhibited better selection for Cu(II) in Cu(II), Co(II), and Ni(II) mixed solutions. Moreover, it can be recycled five times when an EDTA was used as a de-sorbent. The exploration based on statistical physics principle confirmed that the adsorption of these membranes for Cu(II) is a mono-ion manner. These findings suggest that PMDA@CS/PVA composite membranes are promising sorbents for the removal of toxic metal ions from waste vehicle power batteries or metal-bearing wastewater.
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Biosensors-Basel
·
2025
·Vol. 15
·期 11
·720
·
IF 5.6
Xi Su,Xinyu He,Chuang Ge,Yipei Wang,Yi Xu
Rapid detection and identification of airborne bacteria are critical for safeguarding human health, yet current technologies remain inadequate. To address this gap, we developed a multifunctional biochip that synergistically integrated a heptagonal micropillar array with a silver nanostructure–polydopamine–co–chitosan (AgNS@PDA–co–CS) composite gel to achieve highly efficient sampling, capture, enrichment, and in situ SERS detection of airborne bacteria. The integrated micropillar array increased the capture efficiency ofS. aureusin aerosols from 11.4% (with a flat chip) to 86.3%, owing to its high specific surface area and its ability to generate chaotic vortices that promote bacterial impaction. Subsequent functionalization with the AgNS@PDA–co–CS gel improved the capture efficiency further to >99.9%, due to the synergistic effect of the gel’s adhesive properties and the abundant capture sites provided by the nanostructure, which collectively ensure robust bacterial retention. The incorporated AgNS also served as SERS-active sites, enabling direct identification of capturedS. aureusat concentrations as low as 105CFU m−3after 20 min of sampling. Furthermore, the platform successfully distinguished among three common bacterial species—S. aureus,E. coli, andBacillus cereus—based on their SERS spectral profiles combined with principal component analysis (PCA). This work presents a synergistic strategy for simultaneous bacterial sampling, capture, enrichment, and detection, offering a promising platform for rapid airborne pathogen monitoring.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xin Huang,Yongqian Cui,Hao Liang,Xiaobo Li,Jenyuk Lohwacharin,Chuanyi Wang
Hydrogel-based solar interfacial evaporation for seawater desalination is limited by inadequate evaporation rates and inefficient light harvesting, particularly under non-perpendicular illumination. Herein, This study introduces a peony-like single-layer graphene oxide (SLGO)/polyvinyl alcohol (PVA) 3D hydrogel evaporator (GPH) featuring a geometric light-trapping architecture. By exploiting synergistic edge curvature gradients and surface aperiodic wrinkles, the GPH induces multiple internal reflections to effectively manipulate the optical path, thereby overcoming the light absorption limitations of conventional evaporators under oblique incidence. Beyond optical management, precisely tuning the SLGO/PVA ratio optimizes the polymer network's hydrogen bonding, which elevates the intermediate/free water ratio to 0.78 and drastically reduces the water evaporation enthalpy to 1248 J g −1 (cf. 2450 J g −1 for bulk water). Consequently, an exceptional evaporation rate of 2.761 kg m −2 h −1 (20% enhancement over conventional homogeneous hydrogels) and energy efficiency of 91.61% are achieved under 1-sun intensity. Crucially, the hierarchical 3D porous architecture facilitates rapid water replenishment and efficient ion diffusion, endowing the evaporator with robust salt-rejection capabilities. Moreover, the GPH demonstrates outstanding mechanical robustness, with a high fracture strain of 800% in uniaxial tensile tests, indicating its resilience and potential for practical application. This work presents a promising pathway for efficient, reliable seawater desalination and offers a novel perspective for next-generation interfacial solar evaporation technologies.
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