Food Bioscience
·
2025
·
IF 5.9
Wenhui Wang,Heera Jayan,Usman Majeed,Xiaobo Zou,Qin Hu,Zhiming Guo
The misuse of additives is a major problem for global food safety, and of particular concern is Auramine O (AO). Although the analysis of AO by fluorescent carbon dots (CDs) has been extensively explored, the development of effective sensitivity enhancement and portable detection solutions based on CDs remains a significant challenge. Herein, we developed a dual-signal ratiometric fluorescent probe (RFP) integrated with fluorescent nanopaper and smartphone application, which has been used to achieve portable visualization and quantitative detection of AO in food and drug samples. The specific response analysis model (RFP) for AO detection was constructed using fluorescence resonance energy transfer and electrostatic attraction between B-CDs and O-CDs. Within a concentration range of 0.0–10.0 μM, achieving a detection limit as low as 12.3 nM. Furthermore, a laboratory device that incorporates portable fluorescent nanopaper into a smartphone was developed to record the color information response ratio (R/B) in combination with the ColorColl application, enabling visual quantitative measurement of AO. This is powerful construction of RFP, which avoids time-consuming synthesis and complex modification. It directly demonstrates the superiority of proportional fluorescence detection over single wavelength detection. This work provides a referable perspective for preliminary monitoring and rapid on-site detection of harmful factors such as AO in food and drug samples.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Wangfei Shen,Qingzhe Zhang,Yingying Wang,Pu Zhang,Xiaoliang Zhang,Chunxia Wu,Cunxin Jia,Jingkang Liu,Xudong Xue,Yanming Wang
Two-dimensional lubricating fillers play a crucial role in strengthening the tribological performance of polymer coatings. In this study, MXene-PDA-Bi 6 O 7 (MXene/Bi 6 O 7 ) heterostructured composite nanofillers were prepared via a mussel-inspired chemical method. Polyimide (PI) composite coatings with varying MXene:Bi₆O₇ mass ratios were fabricated, and their microstructure, mechanical properties, and tribological performance were systematically characterized. The loading of Bi 6 O 7 nanoflowers onto the surface of PDA-modified MXene was achieved through in situ assembly, resulting in the formation of MXene/Bi 6 O 7 heterostructures. The experimental results demonstrated that the synergistic effect of MXene and Bi 6 O 7 significantly enhanced the properties of the PI composite coatings. Specifically, when the MXene-to-Bi₆O₇ mass ratio was 4:6, the PI composite coatings exhibited an 11.2 % reduction in friction coefficient and a 70.5 % decrease in wear rate compared with pure PI. Additionally, the tensile strength of the PI matrix was increased to 185.99 MPa. The MXene/Bi 6 O 7 heterostructure effectively reduced direct contact between the friction pairs by forming a dense transfer membrane, thereby maintaining stable lubrication performance under a broad range of conditions. The study elucidates the role of two-dimensional heterostructures in enhancing the interfacial mechanics and tribological properties of polymers, providing theoretical guidance and technical routes for the development of high-performance abrasion-resistant polymer coating materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jianying Wang,Xu Luo,Tongzhou Li,Jingchen Na,Wanxiu Pang,Hongjie Zhang,Jinkai Hao,Zhigang Shao
Developing efficient and stable single-atom catalysts (SACs) for acidic oxygen evolution reaction (OER) offers a promising direction toward achieving economical and sustainable development of proton exchange membrane water electrolysis (PEMWE). However, their widespread application remains hindered by intrinsic stability challenges. Herein, we engineered an m-Ir SA -CeO 2 catalyst featuring an Ir-O-Ce 4-δ (0 < δ <1) coordination that delivered exceptional efficiency and stability in PEMWE. In this configuration, low-valent Ce species stabilized high-valent Ir active sites through lattice charge compensation, significantly enhancing catalyst activity and durability. X-ray photoelectron spectroscopy, X-ray absorption fine structure spectroscopy, and theoretical calculations revealed electron transfer from Ir to Ce through the Ir-O-Ce 4-δ coordination, which optimized oxygen intermediate adsorption in the adsorbate evolution mechanism and reduced the ionic character of Ir O bonds to boost intrinsic activity and structural stability. The m-Ir SA -CeO 2 achieved a 267 mV overpotential with >500 h stability at 10 mA cm −2 in 0.1 M HClO 4 . Furthermore, the PEMWE electrolyzer employing the m-Ir SA -CeO 2 anode catalyst maintained stable operation at 100 mA cm −2 for >1000 h with an ultralow Ir loading of 0.12 mg cm −2 .
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Environmental Science-Nano
·
2025
·
IF 5.1
Zhehan Yang,Yijie Huang,Mingfang Yang,Ruiqi Wang,Xiaoyan Wu
Poor conductivity and insufficient structural stability of metal–organic frameworks (MOFs) restrict their use in detecting water pollutants. In this work, a PtCu hydrogel was synthesized to support the Cu-BTC MOF (PtCu@Cu-BTC) by coordinating 1,3,5-benzenetricarboxylic acid (BTC) directly on the surface of the PtCu hydrogel for the sensitive detection of o-sec-butylphenol (osBP). Importantly, the three-dimensional network structure of the PtCu hydrogel serves as a stable scaffold, providing a matrix to load metal ions that chelate with BTC. This approach not only enhances the structural stability of the MOFs but also greatly improves their electrical conductivity, allowing the catalyst to maintain consistent catalytic activity and stability during water pollutant detection. Additionally, the in situ formed Cu-BTC coordination layer increases the specific surface area, creating numerous active sites, and offers functional groups that promote pollutant adsorption, thereby significantly boosting sensor performance. The findings show that the developed biosensor has a strong linear response to osBP concentrations ranging from 3 to 100 μM, with a low detection limit of 0.68 μM. This work offers new insights for designing MOF-based functional materials that combine excellent conductivity with robust structural stability.
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CARBON
·
2025
·
IF 11.6
Yadong Li,Yajuan Zhang,Liang Lv,Liuyuan Han,Zhen Guo,Han-Pu Liang,Xilong Wang,Yousheng Yin
The rational design of Pt-based alloy electrocatalysts is vital to improve the durability and performance of proton exchange membrane fuel cells (PEMFCs). However, the instability caused by transition metal leaching and insufficient particle confinement remains a major challenge. Herein, the development of highly dispersed PtFe alloys with rare-earth Gd doping and carbon confinement (PtFeGd x /N–C) by a synergistic strategy of coordination engineering and Gd–O species incorporation is reported. A nitrogen-doped porous carbon support was synthesized via pyrolysis of ZIF-8 precursors containing EDTA-FeNa and Gd(NO 3 ) 3 , yielding uniformly dispersed Gd–Fe oxide domains. Subsequent wet impregnation and in situ alloying with H 2 PtCl 6 generated highly dispersed PtFeGd x nanoparticles. The optimized PtFeGd40/N–C catalyst exhibited a high half-wave potential of 0.94 V and a mass activity of 0.94 A mg Pt −1 , with only 0.5 % activity loss after 100,000 durability cycles. Structural characterizations confirmed strong coordination among Pt, Fe, and Gd, with Gd predominantly present as oxidized species. DFT calculations revealed that Gd and Gd–O doping effectively modulate the Pt d-band center, optimize intermediate adsorption energies, and reduce the reaction barrier to 0.332 eV. This work highlights the synergistic role of rare-earth doping and carbon confinement in enhancing ORR activity and stability, offering a promising strategy for the development of durable Pt-based electrocatalysts for PEMFCs.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhen Wang,Yunhao Wu,Jianjian Zhong,Jianling Li
Two-dimensional transition metal carbide/nitride MXenes have become a hot topic in the field of lithium-ion energy storage due to their unique surface chemistry and excellent electronic conductivity. However, electrodes made of multilayer MXenes suffer from low capacity, poor cycling performance, and slow lithiation kinetics. In this paper, the MoP2@Ti3C2Tx composite was prepared by adsorbing Mo cations on the surface of Ti3C2Tx followed by phosphatization. The uniformly distributed MoP2 nanostructure effectively increases the layer spacing, enlarges the specific surface area, and improves the structural stability of the material. At the same time, MoP2 and Ti3C2Tx are connected by a P−O bond, which accelerates the diffusion and migration of lithium ions and the charge transfer, and the strong covalent Ti−O−P bond can cause rapid charge transfer and stabilize the structure of the material. The electrochemical activity of MoP2 nanostructures also provides more active sites for lithium ions. The presence of the lamellar structure of Ti3C2Tx also inhibits to some extent the expansion of the transition metal phosphide volume with the cycling process, thus realizing more excellent lithium storage capacity. 1/2 MoP2@Ti3C2Tx material has a high reversible capacity of 165.7 mAh g−1 (172% improvement over the original material) at a current density of 3000 mA g−1. The assembled 1/2 MoP2@Ti3C2Tx//AC Li-ion hybrid capacitor LIC has 85.5% capacity retention after cycling at a current density of 1500 mA g−1. The ability of the assembled full battery to illuminate light-emitting diode (LED) light bulbs further confirms that the electrochemical reliability of the device meets the requirements of real-world applications. The results demonstrate that the strategy of constructing in situ-grown MoP2 nanostructures can effectively improve MXene high-energy-density applications in lithium-ion energy storage.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Weifang Zhang,Lianyang Huang,Weijing Guo,Yuan Cheng,Menglu Zhang,Aristides Bakandritsos,Radek Zbořil,Chunli Wang
In Fenton-like reactions, the elevation of the spin state of transition metals enhances the redox processes of adsorbed peroxides and improves the oxidative performance. This study reports an easily accessible carbon-supported high-spin cobalt cluster, Co–NCs/C, which demonstrates enhanced kinetics through selective high-valent cobalt-oxo species (Co(IV)═O) generation for peroxymonosulfate (PMS)-induced catalytic oxidation. This catalyst achieves rapid degradation of sulfamethoxazole (SMX) within the modified kinetic rate constant (k-value) of 2001.7, surpassing all previously reported Co-based catalysts. Furthermore, combined experimental characterizations and density functional theory calculations demonstrate the stable size distribution of cobalt clusters anchored on carbon supports. Within a broad size distribution (0–6 nm), these clusters consistently retain high-spin configurations and exhibit excellent catalytic performance in SMX degradation. The tailored electronic structure of the high-spin Co sites enhances the adsorption and activation of PMS, thereby accelerating the degradation process. This work provides a practical and cost-effective strategy for designing high-efficiency catalysts for PMS-based advanced oxidation processes.
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PubMed
高影响因子
Small
·
2025
·
IF 12.1
Deguang Ji,Zi Yang,Yaxiong Yao,Yichao Hou,Zidong He,Pengfei Da,Wei Shen,Li An,Yuanmiao Sun,Pinxian Xi,Chun-Hua Yan
Copper-based catalysts show considerable promise in the electrochemical CO 2 reduction reaction (CO 2 RR) for the production of hydrocarbons and oxygenates, particularly methane (CH 4 ), which is a highly reduced product. The high-valent state of copper (Cu) exerts a positive influence on the formation pathway of CH 4 , but the reduction potential will lead to a decrease in the valence state during CO 2 RR. In this study, a highly crystalline and structurally well-defined Y 2 Cu 2 O 5 catalyst is constructed to stabilize Cu 2+ with the orderly alternating Y─O skeleton layer, owing to the strong bonding interaction. The Y 2 Cu 2 O 5 exhibits a remarkable enhancement in CH 4 selectivity compared to CuO (up to 9.59-folds), achieving a selectivity of 61.3% at 300 mA cm −2 and 58.4% at 400 mA cm −2 , together with good stability. In situ attenuated total reflectance Fourier transform infrared spectra (ATR-FTIR) and density functional theory (DFT) calculations reveal that the presence of the Y─O skeleton layer in Y 2 Cu 2 O 5 significantly enhances the adsorption of *CO intermediate, and accelerates its hydrogenation process, facilitating the conversion of CO 2 to CH 4 . This work highlights Y─O skeleton-mediated stabilization of Cu 2+ for efficient electroreduction of CO 2 to CH 4 , providing valuable insights into the design of efficient electrocatalysts for CO 2 conversion.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-11
·
IF 5.3
Zhu Guancheng,Zou Jiahui,Lin Xueer,Zhong Huimin,Jiang Cong,Huang Yanyan
By self-assembly of MnCl 2 and arginine under alkaline conditions, ultra-small MnArg nanoparticles were successfully constructed as oxidase (OXD) mimics for intelligent detection of the Ginkgo toxin 4′- O -methylpyridoxal (MPN). The obtained MnArg nanozymes possessed excellent OXD-like activity and thermal stability. Based on the inhibitory effect of MPN for the catalytic activity of MnArg, this system was utilized for the colorimetric sensing of MPN with a low limit of detection (LOD) of 2.16 µg mL −1 . The detection system exhibited good selectivity against other potential interferents. FTIR data showed that the presence of MPN binds with MnArg and shields the active sites, thereby interfering with the oxidase-like activity. Combined with a smartphone and the ColorMax software, this nanozyme-based intelligent detection platform could effectively detect MPN with a LOD of 2.1 µg mL −1 . Our MnArg nanozyme–based system was applied to detect real ginkgo nut samples with recoveries of 92.4–108.7%, and the relative standard deviations were less than 0.7%. This work may promote the development of novel nanozymes and expand their applications in the field of food safety detection. Graphical Abstract
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高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 7
·1361-1367
·
IF 4.872
Juanjuan Li,Xiaochun Hu,Shuo Shi,Yiwei Zhang,Tianming Yao
Early disease diagnosis is very important for the prevention or mitigation of metastasis. Effective and efficient methods are needed to improve the diagnosis and assessment of diseases. Thrombin is a biomarker for diagnosis of some diseases, such as pulmonary metastases and diseases associated with coagulation abnormalities. Lots of methods for detecting thrombin have been reported, however, most of them were based on a single aptamer and needed modification of aptamers, and label free sensors for thrombin detection based on an aptamer pair are challenging. In this work, we present three label free sensing platforms based on [Ru(bpy)2(o-mopip)]2+ (bpy = 2,2-bipyridine; o-mopip = 2-(2-methoxylphenyl)imidazo[4,5-f][1,10]phenanthroline) (OMO) and graphene oxide (GO) for thrombin detection. Thrombin detection using our three label free sensors is accomplished by specific target recognition based on aptamer pair TBA1/TBA2–thrombin, single aptamer TBA1–thrombin or TBA2–thrombin, respectively. Direct readouts of the target recognition is achieved by restoration of the fluorescence of OMO prequenched by GO. All of the three sensing platforms exhibited high sensitivity and selectivity. Furthermore, all sensing platforms were successfully applied to thrombin analysis in diluted bovine serum. According to the thrombin dependent response of the three platforms, the sensing platform based on aptamer pair TBA1 and TBA2 showed the highest sensitivity, widest linearity, best selectivity and recovery in diluted serum to thrombin. These results show that the sensing platform based on an aptamer pair have great potential for clinical diagnosis of disease-related biomarkers.
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PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Lifang Cao,Pu Wang,Yuhan Tang,Hong Liu,Jiasheng Wang
Amorphous ZSM-5 was facilely synthesized by simply tuning the aqua ammonia amount and used as support of Mo-V-O for aerobic oxidation desulfurization. It was found that both geometric and electronic effects help to enhance the catalytic performance. Geometrically, the amorphous ZSM-5 could better disperse the metals due to its higher specific area. Electronically, the amorphous ZSM-5 could enable V to enrich electrons availing for oxygen activation to superoxide radical thanks to its low work function. The superoxide radical combines with Mo to form peroxide and then oxidize the sulfur-containing substrates. 100% desulfurization can be realized at 80°C for model oil with sulfur content of 500 ppm over the amorphous ZSM-5 supported Mo-V-O catalyst. This study provides inspiration for designing efficient catalysts for aerobic oxidation desulfurization.
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ORGANIC & BIOMOLECULAR CHEMISTRY
·
2022
·Vol. 20
·期 28
·5535-5542
·
IF 3.89
Na Li,Xiao Liu,Mingliang Zhang,Zekun Zhang,Beibei Zhang,Xiaohui Wang,Juan Wang,Pengfei Tu,Yong Jiang,She-po Shi
Prenyltransferases (PTs) play important roles in the biosynthesis and structural diversification of natural products. In the present study, two new PTs were characterized from a medicinal plant Murraya exotica. MePT1 unprecedentedly catalyses the formation of two C-geranylated products 8/6-C-geranylumbelliferone together with a trace product 7-O-geranylumbelliferone from umbelliferone. MePT2 regio-specifically catalyses the formation of C-3 dimethylallylated products from quinolone alkaloids. This is the first report that a plant PT catalyses the simultaneous formation of C- and O-prenylated products, and a plant PT specifically utilizes quinolone alkaloids as prenyl acceptors. The results not only provide important insight into the functional diversity of plant PTs and the biosynthesis of the prenylated coumarins, quinolone and carbazole alkaloids in Murraya plants, but also pave the way for the overproduction of the prenylated coumarins and alkaloids using metabolic engineering approaches.
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高影响因子
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