FOOD CHEMISTRY
·
2026
·
IF 9.8
Ping Li,Zhen-quan Yang,Lixia Xiao,Xuechao Xu,Tianzu Guan,Wenyuan Zhou,Xiaowei Tang,Xiaojuan Gong,Qin Hu
This work pioneered a triple-channel probing strategy for ultra-sensitively detecting of quercetin (QRT) using triple-emissive CDs ( TE -CDs) as a fluorescence reporter. The TE- CDs featured triple emission at 350, 415, and 485 nm under 290 nm excitation. Specifically, the introduction of QRT induced differential quenching effects on each emission band, thereby fostering a novel triple-channel sensing approach for QRT detection. This reporter demonstrated a linear detection range of 0.0–60.0 μmol L −1 and an ultralow limit of detection (LOD) of 0.06 μmol L −1 . Notably, QRT triggered a bright-to-dark cyan color transition, facilitating the development of a smartphone-integrated platform and a disposable paper device with LODs of 0.49 and 0.72 μmol L −1 , respectively. The proposed sensing platforms were successfully applied for the detection of in diversified food samples with satisfactory results. This work underscored the significance of TE -CDs as a triple-channel visual reporter, marking a pivotal advancement in enabling on-site detection of QRT.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Jiahao Sun,Yifan Liang,Qiuling Zhang,Pengcheng Hu,Yudong Shen,Jinyi Yang,Lin Luo,Zhenlin Xu,Hong Wang
Organophosphorus (OPs) and carbamate (CMs) pesticides are widely used in agricultural production, which inevitably results in excessive pesticide residues in food. The traditional colorimetric enzyme inhibition method has low sensitivity and cannot achieve trace detection of pesticide residues in food. In this study, we combined the fluorescence of hydrogen-bonded organic frameworks (PFC-1-Cu 2 + ) with the inhibitory effect of pesticides on acetylcholinesterase. By inhibiting the acetylcholinesterase activity upon pesticides to decrease the choline production, a switch-off mode fluorescent emission can be achieved and then a fluorescent enzyme inhibition method for rapid and ultra-sensitive detection of multiple OPs and CMs in food was constructed. As a result, the limits of detection (LOD) for OPs and CMs were 0.19 ng/mL and 0.39 ng/mL, respectively, representing improvements of 33-fold and 27-fold compared to the colorimetric method. Additionally, three representative OPs or CMs (dichlorvos, profenofos and aldicarb sulfoxide) residues were detected in lettuce and rice by this method. The recoveries of the three pesticide residues in lettuce and rice by this method ranged from 81.63 % to 106.67 %, providing a new option for the sensitive detection of OPs and CMs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Lingfeng Liu,Junhui Zhou,Ziqi Cao,Miaolin Chen,Jincheng Cai,Qingjiang Feng,Yuhan Chen,Jianbo Jia,Mengchen Zhang
Membrane-based mono/divalent ions sieving is pivotal for enhancing sustainable development across various fields related to resource extraction, environmental preservation and energy conversion. Two-dimensional (2D) laminar membranes are emerging as promising candidates for high-precision ion separation, where selective ion transport occurs either along the plane (interlayer) or through the plane (interedge). Herein, we propose a reduction-assisted cation-anchored strategy for tailoring both interlayer and interedge ion channels in 2D graphene oxide (GO) membranes. By rational immobilization of a series of semi-dehydrated cations, the GO interplanar interactions and architectures are elaborately manipulated. Characterizations and simulations unveil that alkali cations (K + , Na + , Li + ) and alkaline earth cations (Mg 2+ , Ca 2+ , Ba 2+ ) tend to anchor at interlayer and interedge regions of GO through cation-π and coordination interactions, enabling the angstrom-level size control over the GO interlayer spacings (from 4.4 to 4.6 Å) and the edge-to-edge distances (from 4.1 to 5.8 Å), respectively. By leveraging the synergy of dual-channel co-regulation, the Li + &Ca 2+ -co-anchored reduced GO (Li + &Ca 2+ -rGO) membrane exhibited an extraordinary discrimination ability towards mono/divalent ions. Our findings elucidate the semi-dehydration binding mechanisms of alkali and alkaline earth cations within GO membranes, and highlight their critical roles in angstrom-scale fine-tuning of interlayer and interedge ion channels, paving the way for the development of 2D laminar membranes for precise ion separation applications.
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FOOD HYDROCOLLOIDS
·
2026
·
IF 13.8
Shuo Han,Yanan Zhao,Herui Zhang,Qiufeng Zhang,Boqun Liu,Yang Li
3D printing has emerged as a promising technology for developing nutritional foods to meet the needs of people with dysphagia. However, a single hydrogel or oleogel cannot meet the strict performance requirements for 3D printing, while bigels are ideal inks by combining the merits of both gels. In this study, soybean protein isolate (SPI)–rice bran oil (RBO) bigels were prepared at oleogel/hydrogel ratios of 30:70, 40:60, 50:50, 60:40, and 70:30. The samples were characterized by confocal laser scanning microscopy (CLSM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), rheology, texture profile analysis (TPA), low-field nuclear magnetic resonance (LF-NMR), liquid binding capacity (LBC), oxidative stability, International Dysphagia Diet Standardisation Initiative (IDDSI) tests, and manual extrusion using a 3D printing pen. Increasing oleogel content promoted phase evolution from oil-in-water (O/W) to bicontinuous and water-in-oil (W/O) structures, enhanced hydrogen-bonding-related spectral changes and crystallinity, and reduced free-water mobility. All formulations showed shear-thinning behavior and elastic-dominant networks. Among them, BG6 (60:40) showed the most balanced performance, including the highest thermal stability (Tpeak = 55.17 °C), high LBC (98.68%), relatively slow lipid oxidation, IDDSI Level 5 compliance, and visually stable F-, Z-, and cube-shaped structures under manual extrusion. These results suggest that SPI-RBO bigels, particularly BG6, have potential as plant-based edible inks for dysphagia-oriented 3D printed foods under the tested conditions.
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Qun-Fang Wang,Yun Li,Shi-Hang Yang,Zi-Qi Xiao,Zong Li,Bei-Ning Xiao
Green synthesis of PLA-CQDs as PLA-based N-doped carbon quantum dots is developed. • PLA-CQDs can exhibit quick fluorescence quenching for Fe 3+ and three NAC explosives. • PLA-CQDs probe can have lower LODs, e.g., 57.9 nM (for PA, a typical NAC explosives). • Mechanistic studies show that the quenching reason of Fe 3+ and three NACs is different. • Detection in real water samples and visual sensing with test strips can be achieved. In this study, biobased polymer material poly(lactic acid) (PLA) was used as a green carbon source and ethylenediamine as a nitrogen source to successfully prepare nitrogen-doped carbon quantum dots PLA-CQDs with excellent performance via a one-step hydrothermal method. The morphology, structure, and optical properties of the carbon quantum dots were characterized by using transmission electron microscopy, X-ray photoelectron spectroscopy, FT-IR, and fluorescence spectroscopy. The results show that the PLA-CQDs exhibit a uniform particle size distribution with an average diameter of 4.81 ± 0.89 nm, being rich in amino, hydroxyl, and other functional groups on their surface. Under 365 nm UV lamp irradiation, they can emit bright blue fluorescence with a fluorescence quantum yield of 11.09%. Experimental results demonstrate that the carbon quantum dots have a highly selective fluorescence quenching response to Fe 3+ within 10 s, while also showing excellent recognition ability towards three nitro aromatic compounds (NACs), namely picric acid, p -nitrophenol, and 2,4-dinitrophenol. However, when two types of target analytes coexist, the fluorescence signal overlap occurs, thus the probe is currently only suitable for the detection of a single target analyte. The lower detection limits can reach 3.92 × 10 −7 M (for Fe 3+ ), 5.79 × 10 −8 M (for picric acid), 5.56 × 10 −7 M (for p -nitrophenol), and 1.79 × 10 −7 M (for 2,4-dinitrophenol), respectively. The probe has been applied to the detection of target analytes in real water samples, with spiked recoveries ranging from 94.9% to 104.9% and relative standard deviations below 2.5%, indicating good accuracy and reliability. This study not only achieves high-value utilization of biomass resources by using PLA as a carbon source to prepare multifunctional fluorescent probes, but also provides a new technical approach for the rapid detection of environmental pollutants such as heavy metal ions and NACs in water. Download: Download high-res image (346KB) Download: Download full-size image
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DESALINATION
·
2026
·
IF 9.9
Jiaxin Li,Mengxia Tang,Haopeng Wang,Minrui Huang,Xuenan Feng,Yao Wang,Junxia Yin,Peiyun Wei,Yanfeng Wang,Guandao Gao
Ultrasound-driven polytetrafluoroethylene contact-electro-catalysis reduces Cr(VI) to Cr(III). • PTFE contact-electro-catalysis enables generation of e − , •O 2 − , •OH and H 2 O 2 . • The PTFE contact-electro-catalytic system exhibits strong tolerance toward coexisting ions. • Contact-electro-catalysis decreases the biological toxicity of chromium. Efficient conversion of highly toxic hexavalent chromium (Cr(VI)) into low-toxicity trivalent chromium (Cr(III)) is of critical importance for mitigating environmental risks associated with chromium-containing wastewater. Here, we report an ultrasound-driven contact-electro-catalysis (CEC) process using commercial polytetrafluoroethylene (PTFE) as an efficient catalyst for Cr(VI) reduction. The PTFE CEC system achieved >99% Cr(VI) removal within 30 min under ambient conditions, and bioassays with Microcystis aeruginosa and wheat seedlings confirmed a marked decrease in ecotoxicity. Mechanistic studies revealed that PTFE continuously generated energetic electrons, superoxide radicals, and hydrogen peroxide during ultrasonication, which synergistically mediated the selective conversion of Cr(VI) to Cr(III). The system exhibited high tolerance to coexisting ions and maintained >90% removal efficiency in real water samples and > 95% activity after use in 27 cycles. Unlike conventional approaches, this strategy does not require sacrificial agents, engineered catalysts, or a controlled atmosphere. These findings demonstrate ultrasound-driven PTFE CEC is a green and efficient solution for treatment of Cr(VI)-contaminated wastewater. Download: Download high-res image (87KB) Download: Download full-size image
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JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Huang Zewei,Wang Yingjie,Ye Meiying,Cheng Heyong
Real-time, online and accurate detection of ferric/ferrous ions is quite important for environmental protection and healthcare, which is preferred by portable fluorescent sensors (in solid state) compared to previous sensors (dominant in liquid or turbid suspensions) associated with susceptibility to oxidation and precipitation. Considering the scarcity of the solid-state fluorescent sensors, a nitrogen-doped carbon quantum dots (NCQDs) encapsulated ZIF-8 (NCQD@ZIF-8) photonic crystal (PC) sensor for Fe 3+ and ascorbic acid detection in solid state was constructed by rapid evaporation self-assembly technique. The fluorescence intensity of NCQD was enhanced with slow light effect of ZIF-8 PC. Fe³⁺ was selectively detected based on its ability to quench the fluorescence of QDs@ZIF-8 PC through a combination of the internal filter effect and possible Fe 3+ −QDs complexation. Detection of ascorbic acid (AA) was based on the fact that AA can recover the fluorescence intensity of the NCQD@ZIF-8 PC quenched by Fe 3+ due to AA reduction of Fe 3+ to Fe 2+ . Both Fe 3+ and ascorbic acid can be quickly and selectively detected by the NCQD@ZIF-8 PC sensor in the linear range of 0. 1− 10 mmol L − 1 (R 2 = 0.996) with detection limits of 0.06 mmol·L − 1 and 100 µL sample consumption. Iron speciation analysis (Fe 3+ and Fe 2+ ) in simulated water samples was realized with good precision and accuracy. The NCQD@ZIF-8 PC sensor provided a rapid and portable way for determination of Fe 2+ /Fe 3+ in environmental samples and new possibilities for device fabrication. Graphical
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jiaqi Chen,Weiye Chen,Xinyi Zhao,Yun Xue,Jianzhang Gao,Yongde Yan
The effective treatment of uranium-containing wastewater is of critical importance for environmental radiological protection and the sustainable development of nuclear energy. Nevertheless, achieving directed uranium separation from highly complex systems remains a significant technological challenge. To address this issue, we developed an innovative carbonate-assisted separation strategy specifically for targeted uranium extraction from ultra-complex matrices (13 metal cations and 4 anions). Following the initial separation, uranium retention rate (>50%) in the aqueous phase substantially exceeded that of competing impurity ions, thereby establishing a favorable basis for subsequent purification stages. The separation factors for Cs and Sr were relatively low (3.7 and 7.6), rendering these two elements the hardest impurities to separate from uranium. The separation factors for the remaining impurities range from tens to tens of thousands, indicating excellent separation performance. Further refinement was successfully accomplished through electrochemical processing, which significantly enhanced uranium purity. And the recovery rate could reach over 99%. Comparative experimental studies demonstrated that increased cation concentrations and operating temperatures markedly enhanced the electrochemical extraction efficiency of uranium. To explore the relative importance of experimental parameters, machine learning analysis employing XGBoost gradient boosting combined with SHAP interpretability methods was conducted, revealing that reaction time and electrolyte concentration exerted the greatest influence on the model’s predictions. Characterization results further revealed that carbonate addition simplified uranium reaction pathways to a single dominant process. Collectively, this study establishes a novel conceptual framework and practical methodology for selective uranium separation in uranium-containing wastewater treatment.
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LUMINESCENCE
·
2026
·Vol. 41
·期 7
·e70559
·
IF 2.8
Huiping Zhou,Mingyi Kang,Zhifeng Hao,Xue Zhang,Peng Liu,Guangyou Zhang,Xueying Wang,Na Jiang
Two simple Schiff bases PHMP( (E)-2- ((2-(9H-purin-6-yl)hydrazono)methyl)phenol) and PHMEP( (E)-2- ((2-(9H-purin-6-yl)hydrazono)methyl)-6-ethoxyphenol) were designed and synthesized based on 6-hydrazine-purine with salicylaldehyde and 3-ethoxy-salicylaldehyde, respectively. Among them, both PHMP and PHMEP exhibit significant “turn-on” response characteristics when coordinating with Zn 2+ ions in an EtOH/H 2 O buffer solution, demonstrating remarkable selectivity and sensitivity, accompanied by a noticeable color change. Initially, neither probe exhibited significant fluorescence. However, upon forming complexes with Zn 2+ , PHMP and PHMEP exhibit bright blue and green fluorescence responses, respectively. In contrast, the ethoxy modification in PHMEP alters its steric hindrance and electron cloud density, resulting in fluorescence signals with both superior selectivity and sensitivity compared with PHMP . Additionally, the newly formed complex PHMEP -Zn 2+ can serve as a selective “turn-off” fluorescence probe for Cu 2+ ions. Experimental data indicate that the detection limits of PHMP and PHMEP for Zn 2+ ions are 1.08 × 10 −8 M and 8.85 × 10 −9 M, respectively; the detection limit of PHMEP -Zn 2+ for Cu 2+ ions is 1.79 × 10 −8 M. Job's plot analysis, ESI-MS titration, and theoretical calculations confirmed that the stoichiometric ratio of the probes to the target ions is 1:1. Additionally, PHMP and PHMEP demonstrate broad potential applications in quantitative detection, being suitable for both tap water and convenient test strips.
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ACS ES&T Engineering
·
2026
·
IF 6.3
Shen Xiaotie,Li Ruiyi,Chen Baoliang,Zhu Xiaoying
The degradation of perfluorooctanoic acid (PFOA) remained
challenging
due to the extraordinary stability of its carbon–fluorine bonds,
which were resistant to conventional photocatalytic processes. In
this work, a metal–organic framework (MOF), MIL-125-NH 2 , was grown in situ on reduced graphene oxide (rGO) to form
nanocomposites (RMGs), enabling rapid PFOA degradation via an integrated
dual-redox pathway without the addition of sacrificial agents. Under
UV irradiation, the RMG composite achieved an 80.2% degradation of
PFOA (20 mg L –1 ) within 4 h, corresponding to an
apparent rate constant of 0.405 h –1 , and exhibited
competitive degradation productivity among reported photocatalytic
systems operating without external oxidants or sacrificial agents.
PFOA degradation exhibited pronounced pH dependence with the RMG composite
delivering optimal performance at pH 5. Moreover, the RMG catalyst
showed excellent stability and reusability. In natural water matrices,
the RMG composite achieved approximately 70% PFOA degradation within
10 h. The MOF/rGO heterojunction promoted directional charge separation,
enabling photogenerated holes to trigger carbon–carbon bond
cleavage and stepwise shortening of perfluorinated intermediates,
while electrons were efficiently transferred to PFOA to induce hydrogen–fluorine
atom exchange. Overall, this study highlights the pivotal role of
synergistic redox integration in enabling efficient PFOA remediation
in aqueous systems.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Xuemei Hu,Siying Che,Haiyan Fu,Yuanbin She
Colorimetric detection of trace Hg 2+ relies primarily on enzymes -catalyzed 3,3’,5,5’-tetramethylbenzidine (TMB) reactions, with two inherent drawbacks: substrate solubilization dependence on organic solvents and enzymes-associated limitations. By virtue of unique structural tunability and ionic properties, ionic liquids (ILs) dual-substitute enzymes and organic solvents, breaking through traditional bottlenecks via electrostatic assistance. Specifically, ILs enhance TMB water solubility efficiently through π-π interaction/charge-assisted hydrogen bond (CAHB) synergy, thus obviating organic solvents; meanwhile, CAHB and electrostatic interactions accelerate TMB-Hg 2+ redox reactions, eliminating exogenous H 2 O 2 and enzymes s and cutting response equilibrium time by ~35 min. Experiments confirmed that vs. CAHB-free blank systems shows a 2.2-fold increase in absorbance. Moreover, the system exhibits robust anti-interference, maintaining high sensitivity and stability across the pH range of 4.0–6.0. The paper-based ILs sensor allows naked-eye, on-site detection of trace Hg 2+ efficiently.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Mengru Wang,Biao Zhang,Wen-Sheng Zou,Jinhui Zhang,Yaqin Wang
A self-cleaning ultrafiltration membrane with electrically switchable antifouling and antibacterial functions was developed by incorporating a g‑C 3 N 4 /reduced graphene oxide (rGO) composite into a polyvinylidene fluoride (PVDF) matrix. At + 1.5 V, the optimized membrane (M3, 7.5 wt% g‑C 3 N 4 ) achieved a pure water flux of 115.97 L·m −2 ·h −1 , and a BSA flux retention 85.6 % (51.35 L·m −2 ·h −1 ) after 3 h, outperforming the control membrane (M0) with 76.57 L·m −2 ·h −1 , and 59.2 % retention (35.53 L·m −2 ·h −1 ). The M3 membrane achieved a BSA rejection of 99.70 %, a flux recovery ratio (FRR) of 93.86 %, and an antibacterial efficiency of ∼99.7 % against E. coli under dark conditions. The superior self-cleaning performance is attributed to the synergistic effects of enhanced electrostatic repulsion and electrocatalytic generation of reactive oxygen species (ROS). This work offers a practical strategy for designing smart separation membranes with on-demand antifouling and self-cleaning capabilities for advanced water purification.
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