JOURNAL OF LIGHTWAVE TECHNOLOGY
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2026
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IF 5.2
Zhiyong Yin
The simultaneous and specific detection of multiple heavy metal ions in complex environments remains a significant challenge for optical fiber sensors, primarily due to spectral crosstalk and temperature interference. To address this, we present a monolithically-integrated, dual-channel surface plasmon resonance (SPR) fiber sensor capable of crosstalk-compensated and temperature-compensated detection of Cu²⁺ and Ni²⁺. The sensor is fabricated by cascading two sensing regions on a single microstructured optical fiber (MOF), where a strategic combination of heterogeneous metallic films—a silver film for the Cu²⁺ channel and a gold film for the Ni²⁺ channel—creates two spectrally distinct resonance dips in the visible range. To overcome the limitation of specificity, ion-imprinted polymers (polyacrylic acid and chitosan) are functionalized onto the respective channels, creating highly selective recognition sites. Furthermore, an independent temperature-sensing probe, with its resonance strategically located in the near-infrared region, is incorporated into the optical path for real-time temperature monitoring, effectively eliminating thermal cross-sensitivity. Experimental results demonstrate that the sensor exhibits high sensitivity (up to 0.41 nm/μM for Cu²⁺ and 0.34 nm/μM for Ni²⁺ in the low concentration regime), a fast response time (20-30 s), and low detection limits. This work provides a compact and robust all-in-one sensing solution that paves the way for practical, multi-analyte environmental monitoring.
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高影响因子
Energy Materials
·
2026
·Vol. 6
·期 3
·N
·
IF 11.9
Jie Zhang\u003Csup\u003E1,\u003C\u002Fsup\u003E,Xiao-Lei Shi\u003Csup\u003E2,\u003C\u002Fsup\u003E,Li Zhang\u003Csup\u003E1,*\u003C\u002Fsup\u003E,Meng Li\u003Csup\u003E2\u003C\u002Fsup\u003E,Wenyi Chen\u003Csup\u003E2\u003C\u002Fsup\u003E,Jianfeng Zhu\u003Csup\u003E1\u003C\u002Fsup\u003E,Yanling Yang\u003Csup\u003E1,*\u003C\u002Fsup\u003E,Zhi-Gang Chen\u003Csup\u003E2,*\u003C\u002Fsup\u003E
p-Type Mg3Sb2 possesses strong thermoelectric potential, yet effective strategies to further enhance its performance remain underexplored. In this study, we investigated the p-type Zintl-phase compound Mg3Sb2 and proposed a Zn/Cu co-doping strategy to synergistically optimize carrier transport and lattice thermal conductivity. Mg3.1-xZnxSb2 (x = 0, 0.4, 0.6, and 0.8) and Mg2.3-yZn0.8CuySb2 (y = 0, 0.075, 0.100, and 0.125) series samples were prepared via high-energy ball milling followed by hot pressing. First-principles calculations reveal that substituting Mg sites with Zn and Cu induces pronounced band-structure modulation, shifting the Fermi level into the valence band and narrowing the bandgap. These effects collectively increase hole concentration and enhance electrical conductivity. Meanwhile, the mass fluctuation and local lattice distortion introduced by co-doping intensify phonon scattering, resulting in a substantial reduction in lattice thermal conductivity. Experimentally, Zn/Cu co-doping delivers a well-balanced optimization of thermoelectric transport properties. The Mg2.2Zn0.8Cu0.1Sb2 sample achieves a power factor of 351.99 μW cm-1 K-2 and a peak figure of merit (ZT) of 0.42 at 735 K, corresponding to a 147% improvement compared with the undoped sample. This work elucidates the synergistic effects of Zn/Cu co-doping in electronic band engineering and phonon modulation, offering a promising strategy for the rational design of high-performance p-type Mg3Sb2 and other Zintl-phase thermoelectric materials.
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高影响因子
Molecular Catalysis
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2026
·
IF 4.3
Xiaofei Ma,Shijiao Hao,Hui Jiang,Weiqian Qi,Hefang Wang
Cu-Al mixed oxide catalysts (CxA-LDO), prepared via calcination of layered double hydroxides (LDHs) precursors, were investigated for the transesterification of propylene carbonate (PC) with methanol to dimethyl carbonate (DMC). Characterization demonstrated that calcination temperature and the Cu/Al molar ratio critically influence the surface basicity properties and structural stability. Under optimized conditions (80 °C, 2 h, 2.0 wt% loading, MeOH/PC = 10:1), the C 0.5 A-400-LDO catalyst achieved 57.93% PC conversion and 57.29% DMC yield (TON = 28.94). Surface basicity was identified as the key governing factor for the reaction. This conclusion is supported by a strong correlation observed between the reaction rate and the number of total basic sites. However, the catalyst deactivated significantly over six cycles (PC conversion dropped from 57.93% to 47.2%), which ICP-AES analysis unambiguously attributed to significant copper leaching (8.1 wt.% net loss) rather than sintering. Kinetic analysis revealed a complex reaction mechanism that could be simplified to pseudo-first-order reaction behavior. The activation energies were determined to be Ea( k + ) = 51.61 kJ·mol -1 for the forward reaction and Ea(k - ) = 55.34 kJ·mol -1 for the reverse reaction. Concurrently, a hybrid genetic algorithm-optimized backpropagation (GA-BP) neural network was developed. Compared to conventional BP, the GA-BP model demonstrated superior predictive accuracy (R 2 = 0.997 for training set and 0.977 for testing set) and exhibited significantly reduced error metrics. This study not only contributes to the fundamental understanding of base-catalyzed transesterification but also introduces a synergistic experimental-computational strategy applicable to rational catalyst design.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Siyi Liu,Mingqin Kang,Zhongping Dong,Shuyan Xiao
Single-atom nanozymes exhibit high catalytic efficiency, which is strongly determined by the coordination environment of metal centers and the structure of the supporting carbon matrix. Herein, a series of sulfur-coordinated copper single-atom nanozymes with atomically dispersed Cu-N x sites was synthesized via pyrolysis of zeolitic imidazolate framework-8 precursors co-encapsulating sodium copper chlorophyllin (SCC) and L -cysteine. SCC provided Cu-N 4 motifs, stabilizing atomically dispersed Cu sites during pyrolysis. L -cysteine plays a multifaceted role by introducing Cu-S coordination, regulating carbon framework size, and generating defect-rich structures, collectively enhancing oxidase-like activity. The optimized nanozyme exhibited a Michaelis-Menten constant of 0.28 mM and a maximum reaction rate of 6.73 × 10⁻ 8 M·s⁻ 1 , indicating strong substrate affinity and rapid catalytic turnover. Using this nanozyme, a colorimetric sensor for D -penicillamine ( D -PA) was developed, achieving an ultra-wide detection range from 0.5 to 3000 μM through a segmented detection strategy, with a low detection limit of 0.279 μM and recoveries of 92.7–107.4% in river water samples. This work demonstrates a robust sulfur-coordination strategy for high-performance single-atom nanozymes and provides a practical platform for monitoring pharmaceutical pollutants over an ultra-wide concentration range.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 4.4
Zhao Jianghui,Cui Huaqiang,Yang Qinqin,Ye Wuyi,Huang Aofeng,Wu Bo,Liu Zhi
Doping has been widely explored as an effective strategy to enhance the photocatalytic performance of TiO 2 under visible light for degrading organic pollutants. However, conventional dopants derived from chemical reagents raise environmental and human safety concerns. In this study, natural down fiber (DF) was innovatively employed as a sustainable and green source of C and N, combined with copper acetate as the copper source, to fabricate C–N–Cu co-doped TiO 2 (C–N–Cu@TiO 2 ) via a facile one-step hydrothermal method. Comprehensive characterization revealed that, compared to pure TiO 2 , the co-doped C–N–Cu@TiO 2 exhibited a narrowed band gap (from 3.11 to 2.83 eV), reduced photoluminescence intensity, and enhanced photocurrent density, indicating improved visible-light absorption and effective suppression of electron–hole recombination. Under simulated one-sun irradiation, C–N–Cu@TiO 2 demonstrated outstanding photocatalytic activity, achieving a high degradation efficiency of 98.20% for methyl orange within 2 h, which is competitive with many reported doped TiO 2 photocatalysts. Trapping experiments identified O 2 − and h + as the primary active species, and a plausible photocatalytic mechanism was proposed accordingly. This work not only confirms the effectiveness of natural DF as an eco-friendly and sustainable doping source, but also encourages further exploration of biomass-derived functional materials for applications in wastewater treatment, photocatalytic hydrogen evolution, carbon dioxide reduction, and related fields.
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高影响因子
Analytical Methods
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2026
·
IF 3
Shengyi Fang,Sheng Ye,Dan Ouyang,Songyan Tie,Jianzhong Cao
Nanocatalysts based on metal-organic frameworks exhibit limited catalytic activity due to their symmetrical inactive structures, thereby restricting their application in nanozyme-linked immunoassays (NLISA). This work constructed geometrically structure expanded Cu-Co bimetallic metal-organic frameworks (GS-CCBM) nanozymes through a two-step hydrothermal and alkali treatment, enabling a specific nanozyme-based immunoassay for the target alpha-fetoprotein (AFP). The constructed GS-CCBM nanozyme demonstrated excellent substrate affinity (Km = 1.79 mM) and H2O2 reaction rate (Vm = 8.569 μmol min-1). Based on this, a signal probe was constructed that enables changes in the absorbance and color of the catalytic system in the presence of the target AFP. Semi-quantitative and quantitative analyses were performed using a self-developed color value extraction system. Under optimized conditions, the constructed NLISA method demonstrated an acceptable working range (0.01–50 ng mL⁻¹) and a sensitive detection limit (LOD = 4.7 pg mL⁻¹) for AFP. This approach innovatively proposes a novel strategy for constructing highly efficient MOF-based nanozymes with catalytic activity, offering a new method for developing novel clinical detection techniques.
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高影响因子
ACS Nano
·
2026
·
IF 17.3
XuanLin Zhao,Tao Wang,QiLong Zhou,ZeLiang Wei,Ying Zhang,XiaoYi Wu,YuDa Zhu,XiuXian Yu,HongLi Jiang,XinRui Xu,Kun Zhang,Guang Xin,Wen Huang
Acute pancreatitis (AP) is a common and potentially fatal inflammatory disorder lacking effective targeted therapies. Mitochondrial dysfunction, marked by ATP depletion and excessive ROS production, lies at the heart of disease initiation and progression. This study presents a hierarchically targeted nanotherapeutic, Cu-CDs/Kyna@RM (RMCK), in which copper-doped, mitochondria-targeting carbon dots (Cu-CDs) are grafted with kynurenic acid (Kyna) and encapsulated within red blood cell-macrophage hybrid membranes. Upon systemic administration, RMCK homes to inflamed pancreatic tissue, where it sequentially releases Cu-CDs to target mitochondria, scavenge ROS, liberate Kyna, and restore mitochondrial function. It markedly improves survival, lowers serum amylase/lipase, attenuates pancreatic edema and necrosis, and prevents secondary lung injury, outperforming free Kyna therapy. In vitro, RMCK significantly reduces sodium taurocholate (STC)-induced acinar cell injury, measured by decreased cell necrosis and LDH release. Mechanistic studies including transcriptomics, immunohistochemistry, and functional assays reveal that RMCK amplifies GPR35-NF-κB inhibition to curb cytokine storms, prevents mtDNA-driven inflammasome activation, and alleviates hypoxia to downregulate HIF-1α and upregulate PPARγ for restored fatty acid oxidation. By integrating organ- and organelle-level targeting with ROS scavenging and mitochondrial energy remodeling, RMCK delivers synergistic, precision therapy for AP and offers a versatile platform for other inflammatory diseases characterized by mitochondrial dysfunction.
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高影响因子
ACS Applied Materials & Interfaces
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2026
·
IF 7.8
Xunxun Li,Lei Jing,Shiwei Wang,Hexin Li,Yijia Li,Yaru Wang,Shouying Huang,Hongbo Yu,Jing Lv,Xinbin Ma
Copper-based catalysts suffer from sintering and excessive oxidation during the methanol oxidation carbonylation process to produce dimethyl carbonate (DMC), which leads to their easy deactivation and thus are restricted in industrial applications. In this work, we designed and fabricated a series of nitrogen-doped carbon-supported copper-cobalt nanoparticles (CuxCo-NC). A distinctive volcano-type dependence of catalytic activity on the Cu/Co molar ratio was revealed, and a remarkable DMC space-time yield (STY) of 5.35 g g-1 cat·h-1 was delivered by the optimal composition (Cu/Co = 3). There was a strong metal-support interaction between the Cu-Co nanoparticles and the N-doped carbon matrix, promoting the dispersion of the metal. This study has demonstrated the role of ZIF-derived nitrogen-doped carbon materials in the liquid-phase oxidation and carbonylation of methanol, providing a foundation for subsequent research.
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高影响因子
TALANTA
·
2026
·
IF 6.7
Wenli Chen,Renjie Li,Wenxi Wang,Kaixi Yin,Xiandeng Hou,Li Wu
A facilely fabricated Ag/Cu-TCPP was developed as a SERS substrate. • Saliva uric acid (UA) was quantified with 0.04 μM detection limit. • Synergy in molecular enrichment and EM enhancement improved SERS sensitivity. • Time-resolved monitoring of UA fluctuations in real saliva samples was achieved. Surface-enhanced Raman scattering (SERS) methods offer high sensitivity for uric acid (UA) detection, but efficient molecular enrichment and reliable analysis in complex biological matrices remain challenging. Here, we developed an Ag/Cu-TCPP SERS platform for noninvasive determination of UA in saliva. The platform combined the electromagnetic enhancement provided by Ag nanoparticles (Ag NPs) with the molecular enrichment capability of Cu-TCPP. Density functional theory calculations further indicated that UA can be enriched on Cu-TCPP through weak Cu···O quasi-coordination between the UA carbonyl oxygen and exposed Cu centers, accompanied by interfacial charge redistribution. Consequently, the platform achieved a low detection limit of 0.04 μM and a wide linear range of 0.1–1000 μM. Beyond conventional single-point determination, the platform enabled time-resolved assessment of salivary UA concentration, revealing temporal fluctuations under physiological and feeding-related conditions. These results highlight the potential of MOF-integrated SERS platforms for noninvasive monitoring of small-molecule biomarkers. Download: Download high-res image (242KB) Download: Download full-size image
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 44
·34779-34794
·
IF 4.4
Wen Lihan,Shen Juan,Wu Shuangxian,Jin Bo
Radioactive strontium ( 90 Sr) contamination in water bodies poses one of the most persistent and serious threats to both ecological safety and public health, owing to its long half-life, high environmental mobility, and strong propensity for biological accumulation. However, a rapid and sustainable synthetic route for bimetallic MOF-74 with high Sr 2+ adsorption capacity remains lacking. This study reports a solvent‑free mechanochemical strategy for the synthesis of a bimetallic Cu/Zn-MOF-74 (CZ-M74-11) using a spiral gas-solid flow (S-GSF) method in just 1 min. The material achieves 98.26% Sr 2+ removal within 15 min and exhibits a maximum Langmuir adsorption capacity of 295.13 mg·g −1 at 303.15 K. Kinetic and thermodynamic analyses indicate that the adsorption is spontaneous and exothermic. XPS and FT-IR analyses, together with cyclic desorption data, reveal that Sr 2+ uptake proceeds primarily through outer-sphere complexation, with a minor contribution from inner‑sphere coordination involving carboxylate groups. This work addresses the gap in rapid and sustainable routes for bimetallic MOF-74 synthesis by introducing an S-GSF method that achieves excellent adsorption capacity and ultrafast kinetics for Sr 2+ removal. Graphical abstract
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Yifan Du,Yanfang Huang,Wenjuan Wang,Bingbing Liu,Guihong Han
Traditional flotation separation relies heavily on the electrostatic attraction mechanism for surfactant adsorption. The low surface potential of heavy metal-organic aggregates poses a challenge to flotation. This near-neutrality causes the traditional electrostatically driven adsorption mode to fail, creating a critical bottleneck for efficient pollutant removal. In this study, the near electroneutral aggregates of DDTC-Cu were selected as the research object, and the regulatory effect of surfactants on them was innovatively revealed. Zeta potential measurements and DFT simulations revealed that surfactants cause charge redistribution. This enables directional adsorption through local electrostatic and van der Waals interactions and alters the flocculation morphology and structure. The addition of DTAB did not significantly change the particle contact angle but enhanced aggregate floatability. It significantly increased the zeta potential from near zero to a moderately positive level, reduced the aggregate size from large to medium, and increased the fractal dimension from relatively loose to more compact and smooth, resulting in a denser and smoother structure. AFM confirmed that the interaction energy increased by 4.4 times. Therefore, the improvement in flotation recovery of near electroneutral particles by surfactants is not mainly driven by enhanced hydrophobicity. Instead, it results from the synergistic regulation of surface potential and the optimization of aggregate structure. This study provides key mechanistic insights for improving the flotation process of complex pollutants with near electroneutral characteristics.
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高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Xiaolu Sun,Yong Liu,Linhua Jiang,Ning Duan,Jinyu Wang,Hao Jin,Guangbin Zhu,Lijun Wang,Weidong Li
The sulfidation is widely adopted for treatment of arsenic-contained solution. Within the copper smelting industry, multivalent arsenic hazards primarily arise from copper smelting waste acid (CSWA) and electrolytic refining purification solution (ERPS), also containing valuable copper resources. Due to the diversified competitive sulfidations of multivalent arsenic, the conventional mixed treatment process of Cu(Ⅱ)-As(Ⅲ) and Cu(Ⅱ)-As(Ⅴ) solutions is difficult to achieve efficient copper recovery and arsenic removal. According to Avrami kinetics, the sulfidation reaction rates for Cu(Ⅱ), As(Ⅲ), and As(Ⅴ) are 35.0339 M −1 s −1 , 34.7333 M −1 s −1 , and 0.05551 M −1 s −1 , respectively. Thus, Cu/As separation causes 72.02% arsenic content in the Cu(Ⅱ)-As(Ⅲ) sulfide precipitates, and less than 6.45% arsenic content in the Cu(Ⅱ)-As(Ⅴ) sulfide precipitates. Interestingly, the rapid nucleation of As(Ⅲ) sulfide provides a heterogeneous nucleation and secondary growth platform for As(Ⅴ) sulfide, facilitating rapid settling of As(Ⅲ)-As(Ⅴ) sulfide. Therefore, based on the difference in sulfidation rates, a novel process for Cu/As separation in CSWA and ERPS is proposed, involving copper split recovery and arsenic mixed removal. Value assessment of this process suggests that arsenic reuse can be diminished by approximately 645 tons annually through copper split recovery, and the particle size of As(Ⅲ)-As(Ⅴ) sulfide increases at least 44.3% via arsenic mixed removal. This study improves the sulfidation process of Cu/As separation in the copper smelting industry, which is significant for environmental protection and resource recovery.
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PubMed
高影响因子
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