Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121360
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IF 7.2
Feifei Hu,Zhiqiang Liu,Hao Du,Baohua Wang,Jian Qi,Liang Zhao,Shaona Wang,Lanjie Li
Vanadium redox flow batteries (VRFB) is recognized as one of the most promising technologies for large-scale renewable energy storage, owing to its high safety, long cycle life and lack of cross-contamination. The vanadium electrolyte, which governs the overall energy storage capacity, performance and stability of VRFB, still faces challenges such as complex preparation process and high production cost. In this work, we present a short-route synthesis of V 3.5+ electrolytes via COG-assisted thermal reduction of NH 4 VO 3 under controlled atmospheric conditions. This approach enables rapid conversion of NH 4 VO 3 into mixed-valence vanadium oxide, followed by direct acid dissolution into the desired V 3.5+ electrolyte. Combined thermodynamic analysis and molecular dynamics simulations reveal a sequential mechanism involving deammoniation, dehydration, and reduction, with V 4 O 7 (V 3.5+ ) identified as the key intermediate phase. After optimized acid dissolution, the resulting electrolyte exhibits a V 3+ /V 4+ ratio of 1.01. Electrochemical evaluations confirm that the prepared electrolyte possesses reversibility, conductivity, and stability comparable to those of commercial counterparts, along with superior capacity retention over 400 charge–discharge cycles. A techno-economic analysis indicates that the proposed process increases the profit to 4.88 $ per kg of NH 4 VO 3 compared to conventional chemical reduction–electrolysis methods, while reducing energy consumption by 40.64 %. These findings underscore the potential of this route for scalable, industrial production of high-performance vanadium electrolytes.
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CARBON
·
2026
·
IF 11.6
Haowei Zhou,Xiao Li,Zilin Huang,Zhongming Liu,Man Li,Jieyan Zhang,Yu Wang,Zhaochen Xi,Moustafa Adel Darwish,Tao Zhou,Di Zhou
To meet the demand for miniaturisation in electronic devices, the development of absorptive films with adjustable thickness and uniform structure enables direct integration into microelectronic components, thereby addressing electromagnetic interference issues within constrained volumes. To address the limitation of single electromagnetic wave transmission pathways in few-layer MXene films. Three-dimensional interconnect films were fabricated using in situ NH 3 etching technology. The self-stacking phenomenon of MXene was suppressed by pre-deposited carbon dots (CDs), thereby exposing more active sites and enhancing the horizontal attenuation path for electromagnetic waves. During the annealing process, the decomposition of certain CDs releases NH 3 gas, which in situ etches MXene nanosheets. This forms large in-plane pores within the film, thereby constructing vertical electromagnetic wave transmission channels. Moreover, Fe 3 O 4 nanospheres optimise impedance matching whilst incorporating a magnetic loss mechanism. Ultimately, the MXene/CDs/Fe 3 O 4 (MCFs) film not only achieves a minimum reflection loss (RL m ᵢ n ) value of −51.05 dB at 13.2 GHz but also attains a maximum effective absorption bandwidth (EAB max ) value of 4.96 GHz, significantly outperforming pure MXene films. CST simulations indicate that at 13.2 GHz, the radar cross section (RCS) of the PEC plate covered with MCFs decreases by 24.91 dB m 2 under perpendicular incidence across an incidence angle range of −60° to +60°. This study offers novel insights into developing high-performance MXene-based absorber films by constructing bidirectional electromagnetic wave transmission pathways.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Chenyan Lu,Dajie Zou,Ning Zhang,Huye Li,Yanyan Jia,Huan Wang
In this study, the hexane extract of Asters tataricus was used as the carbon source, and ethylenediamine and 4-bromophenylene diamine were selected as dopants to prepare nitrogen and bromine co-doped carbon dots (N,Br-CDs) by the hydrothermal synthesis method. The obtained fluorescent probe has a uniform particle size distribution, good water solubility and high stability, with a fluorescence quantum yield of 48.43%. Under 420 nm excitation conditions, N,Br-CDs exhibited the strongest fluorescence emission at 513 nm, indicating that the sensing system was in the “ON” state. Subsequently, TA was introduced as a quencher to induce static quenching of the N,Br-CDs system, significantly weakening the fluorescence intensity and switching the sensing system from “ON” to “OFF”. Finally, after EM was introduced into the N,Br-CDs/TA system, EM preferentially formed a complex with TA and weakened its quenching effect on the quantum dots, thereby achieving fluorescence recovery and returning the sensing system from the “OFF” state to the “ON” state. Based on the above mechanism, an “ON-OFF-ON” fluorescence sensing system with N,Br-CDs as the luminescent substrate was constructed for the sensitive detection of TA and EM. The results showed that the system exhibited good linear response to TA, with the linear ranges being 1.50–22.94 μM and 34.88–348.42 μM, respectively, and the limits of detection being 0.2168 μM and 2.1797 μM, respectively (LOD, S/N = 3). The linear range for EM was 1.93–377.08 μM, with a detection limit of 0.6693 μM. Furthermore, the sensor system was capable of quantitatively determining TA and EM in human serum, Huangshui River water, and milk matrices, demonstrating its potential for broad application in environmental monitoring and bioanalysis.
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FOOD CHEMISTRY
·
2026
·
IF 9.8
Yujia Song,Li Tian,Ruidan Li,Yanjia Guo,Pengfei Han,Guangping Ma,Hanyue Jiang,Wenzhuo Wang,Tengying Ma
A highly sensitive molecular imprinting electrochemiluminescence (MIP-ECL) sensor was developed for Sudan III detection in food. The sensor utilized nitrogen-vacancy carbon nitride (CNNV) as an efficient ECL emitter in the S 2 O 8 2− system, with sea-urchin-like Pt Au nanoparticles (Pt Au NPs) and Ti 3 CN MXene serving as co-reaction accelerators and support material respectively to enhance signal intensity. Molecular imprinting was achieved using O -phenylenediamine (O-PD) as functional monomer, creating specific recognition sites for Sudan III. The detection mechanism was based on target-induced ECL quenching through electron transfer inhibition. The sensor showed excellent analytical performance with a wide linear range from 1 × 10 −12 to 1 × 10 −6 mol L −1 and an ultralow detection limit of 3.3 × 10 −13 mol L −1 (S/N = 3). Real sample analysis demonstrated good accuracy and precision. The sensor maintained 87.5% of initial response after 20-day storage, indicating good stability. This method provides a reliable approach for monitoring Sudan III in food.
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Small
·
2026
·
IF 12.1
Yu Pan,Hui-Min Xu,Hong-Rui Zhu,Xue-Shan Lin,Lian-Jie Song,Wan-Qing Lu,Jun Mao,Vyacheslav Yu. Fominski,Mikhail M. Maslov,Gao-Ren Li
Electrocatalytic nitrate reduction reaction (NO 3 − RR) for ammonia synthesis is extremely compatible with the concept of green development as it enables both low carbon emission and low energy consumption ammonia (NH 3 ) production, as well as the treatment of pollution in wastewater. However, the unavoidable competing reactions present in the NO 3 − RR process and adsorption limitations of the reactants on the surface hinder the effective activation of nitrate and affect the efficient NH 3 synthesis. Herein, the high-performance V P - CoP/Co(OH) 2 heterojunction catalysts for enhancing NO 3 − RR competition in the NO 3 − to NH 3 conversion process was skillfully constructed by successfully growing Co(OH) 2 nanosheets on P vacancy-rich CoP via an electrochemical in situ reconfiguration strategy. The optimized V P -CoP/Co(OH) 2 exhibits excellent electrocatalytic performance of NO 3 − RR at −0.1 V vs. RHE, corresponding to an NH 3 Faraday efficiency of 96.60% and an NH 3 yield of 0.091 mmol h −1 cm −2 , with a favorable stability. Combination of experimental studies and theoretical calculations demonstrates that P vacancies modify the coordination environment of the Co sites, which in turn modulates the electronic structure and accelerates the charge transfer rate. Heterojunctions, on the other hand, lead to a reconfiguration of the electronic structure at the interface, inducing a further accumulation of charge at the Co active sites. The synergy of both further activates the electronic states around the Co sites, which causes the d-band center moving toward the Fermi energy level, further enhancing the adsorption of NO 3 − and promoting the reduction of NO 3 − . This work focuses on modulating the electronic structure of the Co active sites to enhance its NO 3 − RR electrocatalytic performance, thus delivering a viable pathway for NO 3 − to NH 3 high-efficiency conversion.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Yang Xue,Zhang Likang,Lu Biao,Yin Zhifu,Liu Zongming,Ding Ao
Heavy metal ions (HMIs) pollution poses severe threats to ecological integrity and human health, necessitating the development of sensitive, cost-effective, and matrix-adaptable detection technologies. Carbon quantum dots (CQDs) and their composites have emerged as promising candidates for HMI detection, owing to their exceptional optical properties, high stability, and excellent biocompatibility. In this study, we report a facile, cost-effective, and green synthesis route for the fabrication of red-emitting (R-CQDs) and green-emitting (G-CQDs) carbon quantum dots. These materials were systematically evaluated for the sensitive and selective detection of Hg 2+ , Ag + , and Cu 2+ ions in both aqueous and saliva samples, thereby addressing critical needs in environmental monitoring and non-invasive health assessment. The detection performance was quantified using both ultraviolet–visible (UV–Vis) absorption spectroscopy and fluorescence (FL) spectroscopy. UV–Vis spectroscopy measurements revealed a limit of detection (LOD) of 50 nmol/L for Hg 2+ at 235 nm (using G-CQDs), 100 nmol/L for Ag + at 226 nm (using G-CQDs), and 5 nmol/L for Cu 2+ at 215 nm (using R-CQDs). Fluorescence spectroscopy further demonstrated LODs of 250 nmol/L for Hg 2+ and 5 µmol/L for Ag + (both at an excitation wavelength of 480 nm using G-CQDs), and 0.5 µmol/L for Cu 2+ at an excitation wavelength of 427 nm (using R-CQDs). Collectively, our findings demonstrate that the as-synthesized R-CQDs and G-CQDs exhibit high sensitivity and selectivity toward target HMIs. Their successful application in real water and saliva samples underscores their significant potential for practical environmental monitoring and personal health screening.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Wenting Cai,Shuai Liu,Tongxue Zhang,Ke Fan,Xubin Zhang,Fumin Wang,Jing-Jing Lv,Xijun Liu
The electrooxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) serves as an effective means to substitute the kinetically slow anode oxygen evolution reaction (OER) in water electrolysis for hydrogen generation. Nickel-based materials are promising catalysts, but the weak adsorption ability of the active species NiOOH on HMF leads to slow dehydrogenation kinetics, making the rational design of active Ni sites a huge challenge. Herein, a novel heterojunction catalyst (NiO@Co 3 S 4 /NF) with S vacancies is successfully synthesized by interface engineering. Specifically, the construction of the heterostructure optimizes the electronic structure of Ni, which in turn facilitates the generation of NiOOH and enhances its ability to adsorb substrate molecules. S vacancies are beneficial for exposing more active sites and increasing the active surface area. Density functional theory calculations demonstrate that the interfacial electronic redistribution effectively adjusted the d-band center of Ni, and the strong d-p orbital coupling interaction between Ni and HMF can significantly lower the energy barrier of the dehydrogenation step, thereby promoting the highly selective oxidation of HMF to FDCA. Consequently, the NiO@Co 3 S 4 /NF exhibits outstanding electrocatalytic activity, achieving a current density of 50 mA cm −2 at only 1.30 V vs. RHE, with a FDCA yield of 99.62% and a Faradaic efficiency of 99.67%, along with excellent cycling stability. Our work provides new insights into catalyst regulation for biomass upgrading.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Yiqi Tang,Gongcheng Xu,Xu Zhang,Peicheng Cai,Dingning Mo,Qiuna Zhang,Ying Zhou,Xinghui Hou,Yu Wang
rGO/ZnO- x ( x = 1, 2, 3, 4) composites were successfully synthesized via a two-step co-precipitation method for effective hydrazine (N 2 H 4 ) detection, achieved by embedding reduced graphene oxide (rGO) flakes into ZnO hollow spheres. A systematic study was carried out on the effect of rGO incorporation on the gas sensing performance of the composites, and the enhanced mechanism was deeply discussed. The results indicated that the rGO/ZnO-3 sample exhibited optimum gas-sensing performance, achieving a high response value of 81 and a short response/recovery times (21 s/95 s) to 50 N 2 H 4 at 180℃, along with a low detection limit of 0.1 ppm, excellent reproducibility and long-term stability. The enhanced sensing performance of rGO/ZnO-3 sample can be attributed to the synergistic effect of structural advantages (3D porous networks for rapid gas diffusion) and electronic effects (heterojunction-driven charge transfer), achieving dual optimization of gas adsorption kinetics and signal transduction efficiency. This study presents an effective strategy for developing high-performance N 2 H 4 sensors while offering new insights into the modification of metal oxide-based sensing materials.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8
Xingying Xue,Zhiwen Qi,Hao Zhou,Ran Tao,Wenjun Li,Qin He,Jiandu Lei,Chengzhang Wang
A pulsed ultrasound-assisted deep eutectic solvent (DES) strategy enabled high-efficiency tannin extraction from chestnut burr waste, yielding 104.40 ± 4.31 mg TAE/g DW—2.1-fold higher than conventional aqueous extraction. Comprehensive mechanistic investigations revealed synergistic effects: DES components enhanced hydrogen bonding and electrostatic attraction with tannins, while a favorable solvation energy barrier (ΔG = −85.15 kcal/mol) facilitated extraction. Advanced spectroscopic analysis (FT-IR, HPLC-IT-TOF-MS 2 ) demonstrated DES-induced structural stabilization of hydrolysable tannins, with key components exhibiting a 3.1-fold increase in relative abundance. Specifically, DES was found to suppress water activity while forming protective tannin-DES complexes, as evidenced by characteristic upfield 1 H NMR shifts (Δδ = −0.19 ppm) and distinct vibrational frequency changes. The sustainability of this method was validated through five successful recycling trials and comprehensive green metric assessments. DES-extracted tannins demonstrated >1.2-fold enhanced antioxidant capacity and superior antibacterial activity compared to aqueous extracts. This work establishes an innovative method for agroforestry waste valorization and advances green extraction technologies.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.5
Xichen Yu,Jinan Huang,Yi Zou,Zhuqun Shi,Hongmei Qin,Chuanxi Xiong,Quanling Yang
Lightweight, bio-based absorbers are needed for noise mitigation without bulky cavities. Inspired by graded natural porous media, we prepared regenerated cellulose (RC) cryogels by dissolving and regenerating cellulose, followed by directional or isotropic freezing and subsequent freeze-drying. Directional freezing produced channels with an axial alignment of gradients. In directionally frozen RC cryogels, larger pores were near the hot end, whereas finer pores were near the cold end. Increasing the cellulose content refined the pores. In contrast, epichlorohydrin (ECH) cross-linking stabilized the pore walls while decreasing open porosity. Compression tests showed that compressive strength and volumetric energy absorption increased with solid content, and directionally frozen cryogels were superior at the same cellulose content. The optimal directional RC cryogel exhibited a noise reduction coefficient (NRC) of 0.56, exceeding those of the isotropic and cross-linked RC cryogels (0.54). The directional RC cryogel enabled acoustoelectric energy conversion. The device achieved a voltage output of 3.2 V and a current output of 0.38 μA at 100 Hz. These results demonstrate a scalable, bio-based route to lightweight cryogels that couple centimeter-scale sound absorption with acoustoelectric functionality, offering a sustainable platform for buildings, transportation, and personal noise mitigation.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Yandong Wu,Zihui Zhao,Shiwei Chen,Zhenzhong Guo,Xiaoli Cai,Ling Zhou,Nicole Jaffrezic-Renault,Li Ma,Lang Xu
Valosin-Containing Protein(VCP) as a novel biomarker for heart failure (HF), accurate and timely detection of VCP is crucial for the diagnosis and treatment of HF. This study successfully constructed an electrochemical Immunosensor for ultra-sensitive detection of VCP in serum based on NH 2 -MIL-101 (Fe) and Pt-Pd NPs. Specifically, Pt-N and Pd-N coordination bonds were anchored on NH 2 -MIL-101 (Fe) to immobilize bimetallic nanoparticles, enhancing the conductivity of NH 2 -MIL-101 (Fe) while providing abundant heteronuclear Pt-Pd binding sites for VCP antibodies. Under the optimal experimental conditions, this sensor exhibited a good linear relationship within the VCP concentration range of 10 -7 to 10 -1 μg/mL, with a detection limit as low as 1.99 × 10 -9 μg/mL. Further validation was conducted using clinical serum samples, and the results showed that the sensor could effectively distinguish healthy individuals, HF patients, and patients after treatment. The trend of VCP level changes measured was consistent with the clinical pathological status of the patients, opening up a new avenue for the early diagnosis and therapeutic monitoring of heart failure.
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ENERGY
·
2026
·
IF 9.4
Hui Wan,Chen-Xiang Zhang,Chen-Le Peng,Jian-Hang Nie,Ming-Hua Xian,Zi-Xuan Yang,Lei Li,Yang Liu,Zhen Peng,Shi-Yan Ning,Guang-Dong Liu,Han Chen,Gui-Fang Huang,Wei-Qing Huang
Crystalline-amorphous heterointerfaces, enriched with unsaturated coordination sites and tunable electronic structures, hold great potential for accelerating the hydrogen evolution reaction (HER). However, conventional synthesis strategies provide little control over their density and spatial distribution. Here, by tailoring the Fe composition in NiFe x P, we achieve dynamic phase evolution that drives extensive dissolution-redeposition of Fe 2 P domains, producing dense defect-rich, sub-nanometer amorphous NiFeOOH on NiFe x P (NiFeOOH@NiFe x P). This process enables precise regulation of interface density and establishes intimate crystalline-amorphous junctions. Density functional theory calculations reveal that such interfaces synergistically activate a dual-pathway mechanism: amorphous NiFeOOH reduces the water dissociation barrier to 0.834 eV, while crystalline NiFe x P weakens H* binding via d-band modulation, jointly overcoming the kinetic bottleneck. As a result, the activated NiFeOOH@NiFe 0.2 P catalyst exhibits an ultralow overpotential (only 20 mV at 10 mA cm -2 ), a low Tafel slope of 35.86 mV dec -1 , and remarkable durability (20 mA cm -2 for over 60 h). This work highlights interface-density engineering as a powerful route to break the kinetic bottleneck of alkaline HER.
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