INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.4
Bin Hu,Yifang Hua,Xianghong Yang,Zhenhua Wang,Jun Sun,Jian Cai
The ethnic minority villages in Qiandongnan, Guizhou, are renowned for a large number of traditional stilted wooden buildings, which hold significant ethnic characteristics and cultural value. However, the widespread use of Chinese fir ( Cunninghamia lanceolata ) as construction material poses significant fire safety challenges due to its inherent combustibility, highlighting the need for effective flame-retardant treatments for this species of timber. This study proposed a green and facile flame-retardant strategy based on a supramolecular chelated flame retardant (Cu-AP), assembled from aminotris (methylenephosphonic acid) (ATMP), piperazine (PI), and Cu 2+ . Modified wood was prepared via a vacuum impregnation process. This method significantly enhanced flame retardancy at low concentrations and short treatment times. The introduction of Cu 2+ promoted rapid char formation and aromatization, improving thermal stability and smoke suppression. The treated wood achieved a UL-94 V-0 rating, an increased limiting oxygen index (LOI) of 29.6%, and a peak heat release rate reduction of over 65% in cone calorimetry. This work presented a practical modification approach and material solution for fire protection of traditional stilted wooden buildings with regional characteristics.
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Analytical Methods
·
2015
·Vol. 8
·期 2
·303-310
·
IF 1.821
Xiao Sun,Chuanjie Cai,Tao Liu,Guilong Zhang,Dongqing Cai,Shiquan Xiong,Zhengyan Wu
A Fe3O4/Gd2O3 nanocomposite grafted with polyethyleneimine (PEI) molecules was prepared using a one-pot synthesis method. Through this amino functionalized nanocomposite, a selective and ultra-trace electrochemical sensor for Cu2+ was constructed. The electrochemical performances of the sensor were demonstrated by square wave anodic stripping voltammetry (SWASV). Parameters such as the supporting electrolyte, pH of solution, deposition time, and deposition potential for the sensor were optimized. The sensor linearly responded to Cu2+ concentration in the wide range from 6 to 1680 nM with a detection limit of 0.4 nM (3δ method), indicating that this amino functionalized Fe3O4/Gd2O3 composite could be a promising candidate material for the detection of Cu2+.
研究领域:
材料科学
·
分析化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xike Tian,Yuan Zhao,Yong Li,Chao Yang,Zhaoxin Zhou
Copper is a highly toxic environmental pollutant in the environmental, biological and chemical fields. Therefore, sensitive, selective and visual detection of Cu 2+ is very important for human health and practical applications. Herein, a novel hybrid ratiometric fluorescent nanosensor was developed for rapid and on-site visualization of Cu 2+ on the basis of integrating benzothiazole fluorophore (MDBT) and red-emissive quantum dots (QDs) embedded in silica nanospheres. Such hybrid ratiometric fluorescent nanosensor exhibits dual emissions at 420 and 640 nm under a single excitation wavelength. Due to the ions promoted oxidation reaction of Cu 2+ towards MDBT, the fluorescence of MDBT can be selectively enhanced. Although the embedded QDs are insensitive to the analyte, variations of the dual emission intensity ratios display continuous colour changes from red to blue. The ratiometric fluorescent approach shows high sensitivity and selectivity towards Cu 2+ against other interfering metal ions. The detection limit of Cu 2+ for the hybrid ratiometric fluorescent nanosensor is determined to be 41.71 nM, which is much lower than the allowable level of Cu 2+ (∼20 μM) in drinking water set by U.S. Environmental Protection Agency. Furthermore, this kind of novel nanosensor can also be applied for Cu 2+ detection in actual water samples and exhibits excellent detection ability. This hybrid ratiometric fluorescent nanosensor is simple, fully self-contained and thus potentially attractive for visual identification without the need of elaborate equipments.
研究领域:
环境科学
·
分析化学
·
材料科学
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-20
·
IF 12.6
Sun Xianbin,Wang Xinyi,Li Xudong,Wang Ya,Xu Ruofei,Shen Xinyi,Tan Ding,Liao Jingjing,Chen Haijun,Gao Yu,Zheng Jianping
Reactive oxygen species (ROS)-based nanodynamic therapy is emerging as a promising approach for tumor treatment, particularly in eliciting immune responses for tumor immunotherapy. Nevertheless, the complex tumor microenvironment (TME) and the constraints of current sensitizers substantially compromise therapeutic efficacy. To address these challenges, we developed a rationally designed nanoplatform (LP/CuTT) through lipoic acid-modified orchestrated Cu²⁺-coordinated tetracycline-porphyrin self-assembly, to precisely remodel the immunosuppressive TME while potentiating antitumor immunotherapy via a novel photo-enhanced chemodynamic therapy (CDT) strategy. In vitro studies demonstrated that LP/CuTT-mediated photo-enhanced CDT effectively promoted concurrent apoptosis and cuproptosis in B16-F10 melanoma cells, coupled with robust induction of immunogenic cell death (ICD). Mechanistic investigations revealed that LP/CuTT drives macrophage polarization from tumor-promoting M2 to antitumor M1 phenotypes while promoting dendritic cell (DC) maturation, thereby orchestrating potent antitumor immune responses. In vivo evaluations showed preferential tumor accumulation of LP/CuTT, correlating with substantial ROS generation at tumor sites and remarkable therapeutic outcomes. Quantitative assessments further demonstrated elevated M1 macrophage infiltration in both tumor and splenic tissues, accompanied by enhanced CD8+ and CD4+ T cell recruitment. These findings provide key insights into developing orchestrated metal-coordinated nanotherapeutics by repurposing existing therapeutic agents, enabling the design of multifunctional systems that integrate efficient chemodynamic activity, TME remodeling, and immune activation for effective nanodynamic therapy.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Han Yang,Renqiang Chen,Linjun Dai,Boquan Ren,Feng Yang,Yan-Jun Xu,Qing Li
The purpose of this study was to develop a novel reaction-based fluorescent sensor for the detection of Cu 2+ and glutathione in real wine samples. The sensor, tris-(2-pyridyl)-methylamine rhodol derivative, was synthesized and validated for the tandem and selective detection of both Cu 2+ and glutathione. The sensor exhibited a strong linear correlation between fluorescence intensity and Cu 2+ concentration ranging from 100 to 900 nM, while the in situ generated Cu 2+ ensemble selectively detected glutathione with a robust linear response from 3 to 30 μM. The detection limits for Cu 2+ and glutathione were as low as 28 nM and 0.60 μM, respectively. Additionally, the sensor enabled quantitative detection of Cu 2+ and glutathione in real wine samples. This work provides the first reaction-based fluorescence sensor with an “on-off-on” fluorescence response for the tandem detection of Cu 2+ and glutathione in wine, offering potential applications in food and beverage quality control.
研究领域:
分析化学
·
食品科学
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Analytical Methods
·
2024
·
IF 2.7
Yanhong Chen,Li Lv,Xuanjiao Mao,Jun Chai,Jayne Wu,Yicheng Zhou,Jian Zhang,Haochen Qi
A flexible electrochemical sensor with high sensitivity and specificity is developed using gold nanoparticles (AuNPs) and a reduced graphene oxide/molybdenum disulfide (rGo–MoS2) composite modified screen printed carbon electrode (SPCE), with L-cysteine (L-Cys) as a probe for Cu2+ target recognition. Owing to the AuNPs/rGo–MoS2, the electron transference ability is improved by increasing the specific surface area of the working electrode, and a high sensitivity is achieved. Meanwhile, the bidentate chelation of L-Cys to Cu2+ contributes to a good selectivity. Using differential pulse voltammetry (DPV) for spiked standard Cu2+, the test results show a dynamic range from 0.1 μM to 100 μM, a detection limit of 0.020 μM, and a high sensitivity of 1.190 μA μM−1. Furthermore, detection in both environmental water and human plasma samples demonstrates a wide applicability of this sensor in various matrices, and an excellent feasibility for environmental and clinical applications.
研究领域:
分析化学
·
环境科学
·
生物医学工程
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Shanhao He,Dongmei Yang,Zuqi Li,Bin Li,Huiyan Pan,Zhiqiang Wang,Keliang Wu,Zhiyong Liu
To address the challenges of insufficient near-infrared light utilization and rapid charge recombination in traditional photocatalysts, this study designed and synthesized a hollow-structured Cu 2−x S@ZnIn 2 S 4 S-scheme heterojunction with synergistic photothermal-photocatalytic properties. The synergistic mechanism between plasmonic photothermal effects and heterojunction charge-transfer in broad-spectrum catalysis was systematically elucidated. Experimental results demonstrated that the composite achieved a hydrogen evolution rate of 32.58 mmol g −1 h −1 under AM 1.5G irradiation without cooling water (WCW), which is 3.00 times that of pure ZnIn 2 S 4 . Moreover, the solution temperature reached 47.4 °C under near-infrared (NIR) illumination. Theoretical analysis revealed that the localized surface plasmon resonance (LSPR) of Cu 2−x S extended light absorption into the NIR region and generated a photothermal effect. Meanwhile, the S-scheme band alignment, together with multiple light scattering induced by the hollow structure, synergistically optimized carrier separation and promoted directional charge migration. The catalyst exhibited excellent stability over 750 min and demonstrated measurable NIR-driven activity at wavelengths above 800 nm. By coupling band-engineering with photothermal conversion, this work provided a theoretical foundation and a material prototype for designing efficient full-spectrum solar-to‑hydrogen conversion systems, showing clear application potential in photothermal-assisted artificial photosynthesis.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Mansoor Ahmad,Neha,Yijing Ai,Naseer Ahmad,Behisht Ara,Wei Sun
Monitoring of heavy metals in the environment is critical to reduce health risks. The establishment of a simple and effective electrochemical sensor with high sensitivity and a wide linear range is required for the determination of heavy metal ions. This study reports a new nanocomposite of MAX-phase Ti3AlC2 and graphene oxide (GO) for the electrochemical sensing of cadmium and copper ions. The nanocomposite was synthesized by a modified mixture method and characterized using various physicochemical characterization techniques. XRD patterns confirmed a highly crystalline, phase-pure structure, and SEM analysis revealed the rough and porous surface morphology of the Ti3AlC2@GO nanocomposite. The elemental composition and XPS spectra of the nanocomposite confirmed the successful integration of MAX-phase Ti3AlC2 with GO. The nanocomposite was modified onto a glassy carbon electrode (GCE) using a simple drop-casting procedure. The electrochemical activity of the Ti3AlC2@GO/GCE was analyzed by cyclic voltammetry with differential pulse anodic stripping voltammetry (DPASV) for metal ion analysis. The results indicated that the presence of the Ti3AlC2@GO nanocomposite on the GCE enhanced the sensitivity and selectivity for Cd2+ and Cu2+ analysis. The sensor demonstrated a wide linear range from 0.1 to 100.0 µM with low detection limits of 0.055 µM for Cd2+ and 0.059 µM for Cu2+. The Ti3AlC2@GO/GCE showed excellent stability, sensitivity, selectivity, and reproducibility, making it a promising platform for the reliable electrochemical detection of Cd2+ and Cu2+ in environmental monitoring applications.
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JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·Vol. 77
·期 9
·1131-1140
·
IF 1.237
Qiao Xiujuan,Chen Gengjia,Yue Tianli,Sheng Qinglin
Abstract Zn 2+ and Cu 2+ related to transition metal ions present in foods play essential roles in the health of human and animal metabolism. However, the excess of these ions contaminates foods and causes many kinds of diseases. In recent years, designing chemosensors for detection of the two targets has been widespread but is still a great challenge for practical application. In this study, by reducing expenses, simplifying analytical procedures, and enabling multifunctions, a functional chemosensor was proposed by using tetraphenylethylene derivative ( H 4 tcbpe ) which could selectively and sensitively response to Zn 2+ and Cu 2+ . H 4 tcbpe can be used to detect Zn 2+ with fluorescence enhancement based on aggregation induced emission effect, while fluorescence of H 4 tcbpe can be quenched by Cu 2+ due to the disassembly of H 4 tcbpe aggregates in a solvent/nonsolvent binary mixture of EtOH and H 2 O. Fluorophotometry, UV-Vis, and SEM were used to characterize behavior of the fluorescence sensor. In this work, the detection in liquid solutions was conducted, and a fluorescent test pen for the assay of Zn 2+ and Cu 2+ on a piece of filter paper was fabricated. The proposed fluorescent test pen contained H 4 tcbpe as a “fluorescent probe ink” and made it possible to write words on the area of a filter paper spiked with solutions with different concentrations of Zn 2+ and Cu 2+ . The detection limits for Zn 2+ and Cu 2+ are 43 nM and 0.5 μM, respectively. This fluorescent sensor was applied to sense ions in black fungus samples. The proposed sensor could successfully detect Zn 2+ and Cu 2+ , and the results were in agreement with the data from inductively coupled plasma mass spectrometry, which indicated the reliability of the proposed sensor for applications in the real samples.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 12
·3571-3580
·
IF 4.478
Ye Cui,Xu Fan,Ullah Fateh,Wang Minqiang
Photoelectrochemical (PEC) detection as a potential development strategy for Cu 2+ ion sensor has arisen extensive attention. Herein, CdS/Ti 3 C 2 heterostructure was synthesized by electrostatically driven assembly and hydrothermal method. On the basis of a CdS/Ti 3 C 2 heterostructure, a novel anodic PEC sensing platform was constructed for highly sensitive detection of trace amount of Cu 2+ . Carrier transport at the interface of CdS/Ti 3 C 2 heterostructure was tremendously improved, due to the generation of effective Schottky junctions. Under visible light irradiation, the CdS/Ti 3 C 2 heterostructure-modified PEC platform exhibits great anode photocurrent signal, and the formation of Cu x S reduces the PEC response with the presence of Cu 2+ as a representative analyte. Thus, the linear response of Cu 2+ ranges from 0.1 nM to 10 µM and the limits of detection (LOD, 0.05 nM) are obtained, which is lower than that of WHO’s Guidelines for Drinking-water Quality (30 μM). This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors. Graphical abstract
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Shufang Liu,Ziqian Liu,Qing Su,Qiaolin Wu
Covalent organic frameworks (COFs) with excellent porosity and pre-designable structure have emerged as ideal and promising organic scaffolds for broad applications such as in gas storage, heterogeneous catalysis and fluorescence sensing. Herein, a hydrazone-based COF was synthesized by the condensation of 2,5-bis(2-methoxyethoxy) terephthalohydrazide ( BMTH ) with 1,3,5-triformylbenzene ( TFB ) under solvothermal conditions. The resulting COF material ( TFB-BMTH ) exhibits high crystallinity, excellent porosity with a BET surface area of 632 m 2 g −1 and good thermal and chemical stability. The photoactive TFB-BMTH shows significant catalytic activity and recyclability in photocatalytic oxidative hydroxylation of arylboronic acid. The high photocatalytic performance of TFB-BMTH could be attributed to the effective light-harvesting platform with the efficient generation, migration and separation properties of photogenerated charge pairs in such a system. In addition, TFB-BMTH showed significant fluorescence quenching for the sensing of Cu 2+ . X-ray photoelectron spectroscopy and Fourier transform infrared techniques verified the interaction between Cu 2+ and functional units in TFB-BMTH . This work demonstrates the development of multifunctional COFs and makes important contributions to functional exploration in heterogeneous organic transformation and sensing applications.
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JOURNAL OF FLUORESCENCE
·
2022
·Vol. 32
·期 3
·1099-1107
·
IF 2.525
Wang Kun,Dong Erfei,Fang Min,Zhu Weiju,Li Cun
A new hybrid fluorescent nanosensor (Flu@Mea-CdS) for the Cu 2+ detection in aqueous solution was constructed through fluorescence resonance energy transfer (FRET). The Flu@Mea-CdS was fabricated by amide linkage between CdS quantum dots capped with cysteamine (Mea-CdS) and fluorescein. With the formation of FRET process from Mea-CdS quantum dots to fluorescein, the fluorescence intensity of fluorescein at 520 nm was significantly enhanced. In addition, the sensor based on FRET has high selectivity for Cu 2+ ions detection. With the presence of Cu 2+ ions, Cu 2+ ions were transferred to Cu 2 S by the reaction with Flu@Mea-CdS, which caused the inhibition of FRET process and quenched the fluorescence signal of 520 nm. Compared with Mea-CdS quantum dots, the Flu@Mea-CdS sensor has a lower detection limit for Cu 2+ . The linear range is 4–14 μM, and the detection limit is 0.17 μM. The sensor has been successfully applied to the detection of Cu 2+ ions in practical samples, which shows its potential application value in environmental monitoring.
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