DYES AND PIGMENTS
·
2025
·
IF 4.2
Xiang-Yi He,Gui-Xin Guo,Qing Li
This study introduces a dual-mode sensing platform based on a cerium-based metal-organic framework (UIO-66-NH 2 (Ce)) that exhibits dual-enzyme-like activity for the sensitive and selective detection of tetracycline (TC) in water and milk. It employs feedback-regulated dual-enzyme cascades along with Ce 3+ /Ce 4+ redox-mediated ligand-to-metal charge transfer (LMCT) to achieve signal inversion in both colorimetric and fluorescence outputs. The phosphatase-like activity of UIO-66-NH 2 (Ce) hydrolyzes L-ascorbyl-2-phosphate (AAP), resulting in the generation of ascorbic acid (AA), which subsequently reduces Ce 4+ to Ce 3+ within UIO-66-NH 2 (Ce). This reduction suppresses its oxidase-like activity while enhancing fluorescence through LMCT inhibition. In the presence of TC, the phosphatase-like activity is selectively inhibited, thereby restoring Ce 4+ -driven oxidase activity and quenching fluorescence. The platform offers broad detection ranges, low limits (5.95 nM fluorescence, 17.54 nM colorimetry), high selectivity, and real sample applicability, with smartphone-based analysis via RGB signals for rapid, on-site testing, aiding environmental and food safety monitoring.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Hanlong Liu,Siyao Zhang,Touqeer Premy,Chunpeng Zhang,Fangyuan Liu
Electrocatalytic nitrate reduction to ammonia (NRA) is a promising technology for water remediation, but its application to environmentally relevant low concentrations (< 20 ppm) is severely hampered by mass transport limitations and low selectivity. This study introduces a novel strategy combining pulse electrocatalysis with a tailor-made iron-decorated copper foam (Fe@CF) electrode to overcome these challenges. When applied to 20 ppm nitrate solution, the system under optimized pulse conditions demonstrated a remarkable performance, achieving 99 % nitrate removal efficiency and 96 % ammonia selectivity within 150 min, resulting in an ammonia yield of 93 μg·h⁻¹ ·cm⁻². This represents a significant enhancement over conventional direct current (DC) electrolysis, which suffered from substantial nitrite accumulation. Characterization confirms that Fe nanoparticles, acting as tandem catalytic sites, were uniformly deposited on the porous Cu foam. The superior performance is attributed to a dual-enhancement mechanism: (1) the pulsed potential effectively alleviates mass transport limitations by facilitating reactant replenishment and product desorption, and (2) the synergistic effect between Cu and Fe sites promotes the rapid conversion of nitrite intermediates to ammonia. This work highlights that integrating advanced electrode design with pulse electrocatalysis is a potent approach for efficient and selective nitrogen recovery from dilute nitrate-contaminated water.
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Micromachines
·
2025
·Vol. 16
·期 7
·754
·
IF 3
Shuang Fan,Yangyang Gong,Suliang Chen,Yingmeng Zhang
Layered transition metal dichalcogenides (TMDs) have gained considerable attention as promising cathodes for aqueous zinc-ion batteries (AZIBs) because of their tunable interlayer architecture and rich active sites for Zn2+storage. However, unmodified TMDs face significant challenges, including limited redox activity, sluggish kinetics, and insufficient structural stability during cycling. These limitations are primarily attributed to their narrow interlayer spacing, strong electrostatic interactions, the large ionic hydration radius, and their high binding energy of Zn2+ions. To address these restrictions, an in situ organic polyaniline (PANI) intercalation strategy is proposed to construct molybdenum disulfide (MoS2)-based cathodes with extended layer spacing, thereby improving the zinc storage capabilities. The intercalation of PANI effectively enhances interplanar spacing of MoS2from 0.63 nm to 0.98 nm, significantly facilitating rapid Zn2+diffusion. Additionally, the π-conjugated electron structure introduced by PANI effectively shields the electrostatic interaction between Zn2+ions and the MoS2host, thereby promoting Zn2+diffusion kinetics. Furthermore, PANI also serves as a structural stabilizer, maintaining the integrity of the MoS2layers during Zn-ion insertion/extraction processes. Furthermore, the conductive conjugated PANI boosts the ionic and electronic conductivity of the electrodes. As expected, the PANI–MoS2electrodes exhibit exceptional electrochemical performance, delivering a high specific capacity of 150.1 mA h g−1at 0.1 A g−1and retaining 113.3 mA h g−1at 1 A g−1, with high capacity retention of 81.2% after 500 cycles. Ex situ characterization techniques confirm the efficient and reversible intercalation/deintercalation of Zn2+ions within the PANI–MoS2layers. This work supplies a rational interlayer engineering strategy to optimize the electrochemical performance of MoS2-based electrodes. By addressing the structural and kinetic limitations of TMDs, this approach offers new insights into the development of high-performance AZIBs for energy storage applications.
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高影响因子
Foods
·
2025
·Vol. 14
·期 12
·2116
·
IF 5.1
Xianghui Yan,Ting Peng,Zheling Zeng,Pengbo Wang,Yifang Gao,Xuefang Wen,Jiaheng Xia,Deming Gong,Ping Yu
Medium chain triglycerides (MCTs) are regarded as an important ingredient for functional foods and nutraceuticals.Cinnamomum camphoraseed kernel oil (CCSKO) contains more than 95% medium chain fatty acids (MCFAs), which is a significantly higher level than palm kernel oil (62%) and coconut oil (55%). However, the safety assessment of CCSKO, as the only natural MCT oil rich in capric acid and lauric acid found so far in the world, has not been fully verified. The study aimed to investigate the 90-day sub-chronic oral toxicity and teratogenicity of CCSKO. In the sub-chronic oral toxicity study, no clinically significant adverse events occurred in male or female Sprague–Dawley (SD) rats with CCSKO daily administration for 13 weeks. Moreover, there were no dose–response relationships between CCSKO and body-weight gain, food intake and food utilization in male or female SD rats. No significant differences (p> 0.05) were found in the hematological properties or organ weights between the male and female SD rats. In the teratogenicity test, no toxicological signs were observed in either Wister pregnant rats or fetuses. The no-observed-adverse-effect level of CCSKO was determined to be more than 4 mL/kg body weight. These results suggested that CCSKO may be an excellent edible oil with high oral safety.
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MOLECULES
·
2025
·Vol. 30
·期 12
·2618
·
IF 4.6
Kaining Sun,Xinyi Yang,Fei Qi,Yingjie Liu,Lijing Wang,Bo Feng,Jiankang Yu,Guangbo Che
Peroxymonosulfate (PMS)-based advanced oxidation technology has emerged as an effective means for removing organic pollutants from water due to its strong oxidizing ability. However, enhancing the activation efficiency of PMS represents a key challenge at present. SrTiO3, a typical perovskite metal oxide, holds potential in the field of the photocatalytic degradation of pollutants, yet its application is limited by the wide bandgap and fast carrier recombination rates. This study optimized the photocatalytic performance of SrTiO3by regulating its electronic structure and optical properties through cobalt (Co) doping. Experimental results (TRPL, TPV, UV–Vis DRS, ESR, etc.) and DFT calculations (GGA-PBE) demonstrated that Co doping shifted the d-band center of SrTiO3upwards, optimized the adsorption energy of SO4−, enhanced the sunlight response range, and significantly improved carrier extraction efficiency. Under visible light irradiation, 2,4-dichlorophenol (2,4-DCP) could be effectively degraded within 60 min in a wide pH range. Through Fukui function calculation (B3LYP/6-31G*) and experimental characterization analysis (HPLC-MS and IC), the possible degradation pathways of 2,4-DCP and the mechanism for photocatalysis were investigated. The toxicity analysis (T.E.S.T) confirmed the reduced toxicity of the degradation products of 2,4-DCPs. This study provides a reference for the catalyst design and optimization strategy of PMS-based advanced oxidation technology.
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Materials
·
2025
·Vol. 18
·期 13
·3090
·
IF 3.2
Yuyang Zhou,Yun Li,Hao Liu,Chi Ma,Jing Sun,Xin Liu
Low-surface-energy and wettability-based antifouling coatings have garnered increasing attention in marine applications owing to their environmentally friendly characteristics. However, their limited functionality often results in suboptimal long-term antifouling performance, particularly under dynamic marine conditions. To address these limitations, a polydimethylsiloxane (PDMS)-based slippery (PSL) coating was fabricated on TC4 titanium alloy by integrating surface silanization via (3-Aminopropyl)triethoxysilane (APTES), antimicrobial Ag-TiO2nanoparticles, laser-induced hierarchical microtextures, and silicone oil infusion. The resulting PSL coating exhibited excellent oil retention and stable interfacial slipperiness even after thermal aging. Compared with bare TC4, low-surface-energy Ag-containing coatings, Ag-containing superhydrophobic coatings, and conventional slippery liquid-infused porous surfaces (SLIPS), the PSL coating demonstrated markedly superior resistance to protein adsorption, bacterial attachment, and diatom settlement, indicating an enhanced synergistic antifouling effect. Furthermore, it significantly reduced the diatom concentration in the surrounding medium without complete eradication, underscoring its eco-friendly and non-disruptive antifouling mechanism. This study offers a scalable, durable, and environmentally benign antifouling strategy for marine surface protection.
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Water
·
2025
·Vol. 17
·期 11
·1700
·
IF 3
Xiaoni Lin,Qiang Ge,Xianbo Zhou,Yan Wang,Congyun Zhu,Kuanyong Liu,Jinquan Wan
Bimetallic catalysts can effectively enhance the catalytic degradation efficiency of peroxymonosulfate (PMS), which is usually attributed to the enhancement of electron transfer, but currently, there is no clear explanation of the mechanism of how the electron transfer is enhanced. A nitrogen-doped Fe/Mn composite biochar (FeMn-NBC) was co-constructed by hydrothermal synthesis and high-temperature calcination. The FeMn-NBC activated PMS more efficiently than the monometallic one due to the enhanced electron transfer between Fe and Mn. The FeMn-NBC/PMS system activated PMS with Mn as the active center, and the high oxidation state of Mn4+promoted the acceleration of the PMS adsorption of the generation of Mn2+/Mn3+. This gaining effect accelerated the electron cycling between Fe2+/Fe3+and Mn2+/Mn3+/Mn4+, which enhanced the PMS catalysis to generate free radicals (•OH, SO4•−and •O2−) and non-radicals (1O2) for the efficient degradation of diisobutyl phthalate (DIBP). Benefiting from this gaining effect, the degradation rate of DIBP by the FeMn-NBC/PMS system was increased by 2.43 and 3.38 times compared to Fe-NBC and Mn-NBC. The bimetallic-enhanced electron transfer mechanism proposed in this study facilitated the development of efficient catalysts for more efficient and selective removal of organic pollutants.
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SENSORS
·
2025
·Vol. 25
·期 13
·3948
·
IF 3.5
Kuo Zhao,Yunbo Shi,Haodong Niu,Qinglong Chen,Jinzhou Liu,Bolun Tang,Canda Zheng
Polyaniline (PANI) is an important conductive-polymer gas-sensing material with working temperature and mechanical flexibilities superior to those of conventional metal oxide sensing materials. However, its applicability is limited by its low sensitivity, high detection limits, and long response/recovery times. In this study, we prepared PANI/WS2composites via chemical oxidative polymerization and mechanical blending. A multilayer sensor structure—sequentially printed silver-paste heating electrodes, fluorene polyester insulating layer, silver interdigitated electrodes, and sensing material layer—was fabricated on a polyimide substrate via flexible microelectronic printing and systematically characterized using scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The optimized 5 wt% WS2composite showed enhanced gas-sensing performance, with 219.1% sensitivity to 100 ppm ammonia (2.4-fold higher than that of pure PANI) and reduced response and recovery times of 24 and 91 s, respectively (compared to 81 and 436 s for pure PANI, respectively). Notably, the PANI/WS2sensor detected an ultralow ammonia concentration (100 ppb) with 0.104% sensitivity. The structural characterization and performance analysis results were used to deduce a mechanism for the enhanced sensing capability. These findings highlight the application potential of PANI/WS2composites in flexible gas sensors and provide fundamental insights for PANI-based sensing materials research.
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Membranes
·
2025
·Vol. 15
·期 7
·194
·
IF 3.6
Xiaoyao Wang,Benbing Shi
Proton exchange membranes are widely used in environmentally friendly applications such as fuel cells and electrochemical hydrogen compression. In these applications, an ideal proton exchange membrane should have both excellent proton conductivity and mechanical strength. Polymer proton exchange membranes, such as sulfonated poly(ether ether ketone) (SPEEK) membranes with high ion exchange capacity, can lead to higher proton conductivity. However, the ionic groups may reduce the interaction between polymer segments, lower the membrane’s mechanical strength, and even cause it to dissolve in water as the temperature exceeds 55 °C. The porous graphitic C3N4(Pg–C3N4) nanosheet is an important two–dimensional polymeric carbon–based material and has a high content of –NH2and –NH– groups, which can interact with the sulfonic acid groups in the sulfonated SPEEK polymer, form a more continuous proton transfer channel, and inhibit the movement of the polymer segment, leading to higher proton conductivity and mechanical strength. In this study, we found that a SPEEK membrane containing 3% Pg–C3N4nanosheets achieves the optimized proton conductivity of 138 mS/cm (80 °C and 100% RH) and a mechanical strength of 74.1 MPa, improving both proton conductivity and mechanical strength by over 50% compared to the SPEEK membrane.
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Gels
·
2025
·Vol. 11
·期 6
·440
·
IF 5.3
Haoren Ma,Sijia Liu,Jinyi Ren,Xiaochan Liu,Weiyi Zhang,Ying Zhu,Zhipeng Yuan,Jinxu Zhu,Xibin Yi
Traditional β-eucryptite (LiAlSiO4) is renowned for its unique characteristics of low thermal expansion and high temperature thermal stability, making it an ideal material for precision instruments and aerospace applications. In this study, β-eucryptite was fabricated into an aerogel structure through the sol–gel process and supercritical drying method and using alumina sol as a cost-effective precursor. The synthesized β-eucryptite aerogel demonstrated unique properties including a negative thermal expansion coefficient (−7.85 × 10−6K−1), low density (0.60 g/cm3), and high specific surface area (18.1 m2/g). X-ray diffraction (XRD) and transmission electron microscopy (TEM) mutually corroborated the crystalline structure of β-eucryptite, with XRD confirming the phase purity and TEM imaging revealing well-defined crystal lattice characteristics. Combined nitrogen adsorption–desorption analysis and scanning electron microscopy observations supported the hierarchical porous microstructure, with SEM visualizing interconnected nanoporous networks and nitrogen sorption data verifying the porosity. The negative thermal expansion behavior was directly linked to the β-eucryptite crystal structure, as collectively validated by thermal expansion measurements. Additionally, Fourier transform infrared spectroscopy (FTIR) independently confirmed the aluminosilicate framework structure through characteristic vibrational modes. This research shows the innovation in the synthesis of β-eucryptite aerogel, especially its application potential in precision instruments and building materials that need low thermal expansion and high stability, and the use of aluminum sol as an aluminum source has simplified the preparation steps and reduced production costs.
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Cell Reports Physical Science
·
2025
·
IF 7.3
Keke Shao,Xuan Zhang,Mengjie Song,Jun Shen,Lizhen Huang,Tianzhuo Zhan,Haidong Wang,Bo You,Libor Pekař,Dong Rip Kim,Christopher Yu Hang Chao,Long Zhang
Message storage using documents and telecommunications encounters high energy consumption and a short life cycle in cold regions. Easily available low temperature and water have created the history-recording glaciers. Inspired by the naturally occurring bubbles in glaciers, we elucidate the underlying physics governing them and develop an ice-based message storage method. The formation process of trapped air bubbles is controlled by the heat and mass transfer during freezing. We identify four ice regions based on the bubbles’ distribution and determine the critical freezing rate between the bubble and clear ice regions at 2.87 μm/s. Manipulating the bubble layer by varying the freezing rate successfully utilizes Morse, binary, and ternary codes to store messages. These findings reveal the underlying physics of the trapped air bubble formations, and the intermittent growth of bubble layers also provides the potential for incorporating artificial intelligence into material solidification, glacier analysis, and gas exploration.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jinhua Rao,Wenhui Qin,Julian Lava,Junsheng Chen,Xin Mao,Meishan Wang,Ruiling Zhang
Low-dimensional metal halide perovskites have emerged as a promising class of high-performance phosphors for solid-state lighting applications, owing to their outstanding optical properties, structural diversity, and low-cost solution processability. Here, we report a Mn2+-doped two-dimensional (2D) cadmium chloride perovskite, Mn2+:(EDA)CdCl4 (EDA: ethylenediamine), that achieves highly efficient orange light emission with a near-unity photoluminescence quantum yield (PLQY). The host (EDA)CdCl4 can emit an unusual ultraviolet emission at 320 nm with a PLQY of 51%, associated with Cd vacancy defects. Upon incorporation of Mn ions into the host lattice, an intense broad orange emission emerges at 610 nm with a PLQY of 97% at 265 nm excitation, originating from the spin-forbidden 4T1(G) → 6A1(S) transition of isolated Mn ions. Theoretical calculations and spectroscopic characterizations reveal that efficient electron transfer from the host to Mn contributes to the highly efficient orange emission, giving the doped samples great potential in WLED applications.
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