MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Xiangzhi Meng,Donghan Wang,Fei Shen,Baitong Chen,Ziwen Lin,Juan Hou
Mercury ion (Hg 2+ ) contamination poses a serious threat to the environment and human health, highlighting the need for sensitive and sustainable detection strategies. Herein, we proposed an eco-friendly and low-cost fluorescent detection platform for Hg 2+ using N-doped carbon dots (N-CDs) synthesized from Artemisia argyi-derived cellulose extracted via deep eutectic solvent (DES) technology. The N-CDs showed strong fluorescence quenching toward Hg 2+ , achieving a low detection limit of 1 nM with a wide linear range of 0.05 to 20 μM. Detailed investigation confirmed that the quenching behavior mainly originated from the specific interactions between Hg 2+ and surface functional groups of N-CDs. To enable on-site and real-time applications, a smartphone-based fluorescence sensing system was developed. The quantitative signal was extracted using the (G + B)/G parameter, where G and B represent the green and blue intensity components obtained from Red-Green-Blue images under UV illumination. A clear linear correlation was observed between Hg 2+ concentration and the (G + B)/G response. The method was successfully applied for Hg 2+ detection in real water samples, confirming its practicality. Overall, this green and effective sensing approach offers significant potential for water quality assessment and environmental monitoring.
研究领域:
分析化学
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环境科学
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纳米材料
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生物传感
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可持续化学
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高影响因子
Analytical Methods
·
2025
·
IF 2.6
Yuli Mei,Shuo Yang,Minghui Su,Jianjun Xie,Shengfeng Huang,Zhengjin Jiang,Yang Huang
A nitrogen-doped carbon dots (N-CDs)-based fluorescent sensor was developed for ultrasensitive and selective detection of mercury ions (Hg2+) in complex matrices, such as Panax notoginseng (Burk.) F. H. Chen (Sanqi). The synthesized N-CDs exhibited intense blue fluorescence (quantum yield: 35%) with an ultra-small size of 1.93 ± 0.53 nm. Leveraging dynamic quenching mechanisms, the sensor achieved a linear detection range of 0–50 μM for Hg2+ and an exceptionally low limit of detection (LOD) of 0.2825 nM, outperforming existing CD-based sensors. The N-CDs demonstrated remarkable selectivity for Hg2+ in the presence of interfering ions and complex herbal components. Hg2+ in Sanqi samples was quantified by fluorescence analysis (25.5–26.8 μg kg−1, RSD < 2.0%) and cross-validated via Inductively Coupled Plasma Mass Spectrometry (ICP-MS) (24.8–26.2 μg kg−1, RSD < 1.0%), demonstrating N-CDs’ reliability for precise Hg2+ detection. Additionally, the N-CDs exhibited excellent biocompatibility and were successfully applied for cellular imaging in A549 cells, showcasing their dual functionality in environmental monitoring and biomedical diagnostics.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Qianyi Wu,Mohammed Kamruzzaman
The detection of mercury(II) (Hg2+) and chromium(VI) (Cr6+) is of significant importance due to their high toxicity and harmful effects on the environment and human health. Conventional detection methods are often expensive and time-consuming, highlighting the need for efficient alternatives. Nanozyme-based detection systems have emerged as promising solutions, offering high sensitivity, stability, and cost-effectiveness. However, many existing nanozymes contain toxic components, limiting their practical application in environmental and food safety monitoring. This study reported the development of an organic polymer-based C-A-Fe nanozyme, synthesized via a simple self-assembly chelation process and exhibiting peroxidase-like activity. This nanozyme enabled an effective colorimetric sensing approach for Hg2+ and Cr6+ detection. This nanozyme enables highly sensitive and selective colorimetric detection of Hg2+ and Cr6+ with the assistance of glutathione (GSH) and 8-hydroxyquinoline (8-HQ), achieving detection limits as low as 9.65 nM for Hg2+ and 4.13 nM for Cr6+. Moreover, the system demonstrated high recovery rates in tap water, cod, and spinach samples, confirming its potential for real-world applications in environmental and food safety monitoring.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Jinquan Liu,Siru Liu,Jiao Shi,Dongyun Xu,Guoqing Qin,Yuxiang Duan,Ruoxuan Chen,Xuan Wang,Yan Tan,Shengyuan Yang,Le Li
The development of reliable sensing platforms for the simultaneous detection of multiple heavy metal ions has remained challenging in environmental monitoring. Herein, a novel ratiometric electrochemical sensor was developed using a Cu-MOFs@MnO 2 NSs composite for the simultaneous quantification of Pb 2+ and Hg 2+ . The composite was synthesized through a facile approach and functionalized onto a screen-printed carbon electrode (SPCE) to establish an efficient sensing interface. This design capitalized on the synergistic properties of both components: MnO 2 nanosheets provided abundant surface hydroxyl groups and enhanced electrical conductivity, while Cu-MOFs contributed a large specific surface area with multiple binding sites for metal ion enrichment. Significantly, the incorporated Cu-MOFs functioned as an internal reference, delivering a stable built-in signal for ratiometric analysis. The developed sensor achieved impressive detection limits of 22.69 nmol/L for Pb 2+ and 30.07 nmol/L for Hg 2+ , while maintaining high selectivity and reproducibility in complex matrices. This study not only established a reliable platform for the accurate detection of Pb 2+ and Hg 2+ but also promoted the adoption of ratiometric strategies in electrochemical sensing to support environmental protection and public health security.
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RSC Advances
·
2012
·Vol. 3
·期 4
·1082-1088
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IF 0
Zhengping Dong,Xin Tian,Yuanzhe Chen,Yueping Guo,Jiantai Ma
In the present work, a novel dansyl group functionalized Fe3O4@SiO2 magnetic nanomaterial with a core–shell structure was developed, aiming to detect and remove Hg2+ from aqueous media. The multifunctional nanocomposite shows excellent fluorescence sensitivity and selectivity towards Hg2+ over other metal ions (Na+, K+, Mg2+, Al3+, Ca2+, Cd2+, Ni2+, Co2+, Fe3+, Zn2+, Pb2+, Cu2+, Ag+). Concentrations as low as 10−8 M can be detected and the addition of other metal ions has a negligible influence on the fluorescence emission. Regarding the reversibility of the nanosized sensor, the fluorescence of the DAP-Fe3O4@SiO2 nanocomposite in the presence of Hg2+ ions is found to be almost reversible when treated with iodide anion. Additionally, the nanocomposite can be easily separated from solutions by adding an external magnetic field. Moreover, the functionalized nanosphere shows a good adsorption capacity to Hg2+, which makes it repeatedly applicable for simultaneous Hg2+ sensing and removal from polluted water. These results indicate that the multifunctional nanocomposite may find potential applications for simple detection and easy removal of Hg2+ in biological and environmental areas.
研究领域:
环境科学
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分析化学
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纳米材料
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传感器与检测
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水处理
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DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Xiaoyun Zheng,Yixuan Liu,Yingqi Li,Weilin Zhou,Xianying Chen,HaiYu Feng,Xiaorong Lin,Yong Hu,Yun Chen,Chao Huang,Xiguang Ye
Chitosan-carbon quantum dots-tellurium nanoparticles (CS-CQDs-TeNPs) was a multifunctional nanozyme integrating high stability, photoluminescence, and enzyme-like catalytic activity. • Hg 2+ specifically triggered the oxidase-like activity of CS-CQDs-TeNPs through a ping-pong mechanism. • The mechanism proceeded via in-situ formation of HgTe, which catalyzed ROS (O 2 - /·OH) generation to oxidize the substrate for colorimetric detection. • The CS-CQDs-TeNPs-based colorimetric sensor demonstrated high selectivity and strong anti-interference capability, enabling reliable detection of Hg 2+ in environmental water samples. • The sensor performed on-site detection and simultaneous detoxification of Hg 2 (via conversion to HgTe), presenting a dual-function platform for mercury pollution control. Herein, a CS-CQDs-TeNPs-based colorimetric sensor was developed for the highly sensitive detection and simultaneous harmless conversion of Hg 2+ . In the presence of Hg 2+ , the oxidase-like activity of CS-CQDs-TeNPs was specifically triggered, and its catalytic kinetics followed the ping-pong mechanism. Under conditions of pH 4.0 and 30 °C, the colorimetric sensor constructed from 38.6 μg/mL CS-CQDs-TeNPs and 1.040 mmol/L TMB exhibited optimal activity, demonstrating a V max of 83 (10 −8 ·M·s −1 ) and a K m of 13 mmol/L. Mechanistic studies indicated that Hg 2+ reacted with CS-CQDs-TeNPs to form HgTe in situ. The generated HgTe catalyzed the generation of reactive oxygen species from O 2 . These reactive oxygen species, in combination with the surface oxygen vacancies of the CS-CQDs-TeNPs, synergistically oxidized TMB, thus resulting in a colorimetric response. The CS-CQDs-TeNPs-based colorimetric sensor exhibited excellent selectivity, anti-interference capability, and considerable detection potential, while converting Hg 2+ into low-toxicity HgTe during detection, thus realizing the integration of detection and remediation. This study provides a novel strategy for designing environmentally responsive nanozymes and remediating Hg 2+ pollution.
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PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 23
·3567-3576
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IF 8.683
Peng-Fei Li,Chun-Li Hu,Fang Kong,Jiang-Gao Mao
The exploration of new birefringent materials in the d10 transition metal sulfate selenite system resulted in three new compounds, namely, Hg2(SeO3)(SO4), La2Hg3(SeO3)4(SO4)2(H2O)2 and Ag2Cd(Se2O5)(Se0.3S0.7O4), using mild hydrothermal methods. Hg2(SeO3)(SO4) shows a 3D structure composed of 2D mercury selenite layers connected by 1D mercury sulfate chains; La2Hg3(SeO3)4(SO4)2(H2O)2 features a novel 3D network composed of 1D lanthanum sulfate chains and 2D mercury oxide layers, which are connected by a SeO3 triangular pyramid bridge; Ag2Cd(Se2O5)(Se0.3S0.7O4) exhibits a novel 3D framework that consists of selenate silver layers bridged by SO4 tetrahedra and CdO6 octahedra. These compounds can remain stable above 250 °C and their optical band gap values are larger than 3.5 eV. The birefringence (Δn) of Hg2(SeO3)(SO4) was calculated to be 0.133 at 532 nm and 0.126 at 1064 nm. Hg2(SeO3)(SO4) was proved as the first reported metal selenite sulfate exhibiting a large birefringence. In addition, the IR spectra, TG-DSC curves and theoretical calculations of the three compounds were studied.
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Analytical Methods
·
2022
·Vol. 14
·期 24
·2368-2375
·
IF 3.532
Zhipeng Wu,Chenglin Dai,Yiwu Wang,Lianju Ma,Guangchao Zang,Qian Liu,Shu Zhu
In this paper, a novel analytical platform for the visual, sensitive and reliable analysis of mercury ions (Hg2+) is fabricated based on functionalized doped quantum dots. We synthesized a new specific nano-material, zinc dithiothreitol combined with graphene quantum dots (ZnNCs–NGQDs), by a simple and convenient method which, as an efficient luminophore, was then applied to construct an electrochemiluminescence (ECL) system for the first time. Under optimized conditions, the ECL sensor showed an excellent response for Hg2+ in the linear range of 1.0 mM to 10 pM, with a low detection limit of 3 pM. Moreover, the proposed method demonstrated satisfactory selectivity, stability and acceptable reproducibility for the detection of Hg2+. The recovery of tap water and lake water samples ranged from 96% to 105%, indicating the potential applicability of the proposed method for monitoring environmental water samples. Meanwhile, visual attempts for mercury ion detection by using doped quantum dots have also obtained satisfactory results. Importantly, our research revealed a viable method for improving the sensitivity and convenience of target studies in sensing fields derived from functional material design.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Lu Liu,Lei Shi,Jian-yong Liu,Da-wei Yang,Yao Fu,Xiao-ying Ma,Bu-yue Zhang,Xiu-feng Zhang
ETC (3,3′-di(3-sulfopropyl)-4,5,4′,5′-dibenzo-9-ethylthiacarbocyanine triethylammonium salt), as a derivative of thiazole , is capable of forming various aggregates by the short-range noncovalent interaction forces under specific conditions, accompanying with significant absorbance and fluorescence characteristics. In this work, a label-free probe (ETC) for the detection of Cys (Cysteine) and Hg 2+ was developed based on transformation between monomers and J-aggregations by AGRO100. AGRO100 can transform between single-stranded DNA and G-quadruplex to realize recognition of Cys and Hg 2+ in dual-channel mode. These recognitional signals can be captured by UV–visible absorption spectra and fluorescence spectroscopy. ETC exhibits high sensitivity and selectivity with the detection limit of 0.197 nM in a wide range of 0–15 μM, which can apply of Cys and Hg 2+ detection in human serum.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Miaomiao Hong,Xiangyu Lu,Yuhua Chen,Dongmei Xu
A novel rhodamine-based colorimetric and fluorescent sensor for Hg 2+ was reported. In CH 3 CN/H 2 O (1/99, v/v), the sensor showed high selectivity and sensitivity to Hg 2+ by an emerging absorption peak at 565 nm and a 32-fold fluorescence enhancement at 586 nm with vivid color changes. The absorbance and fluorescence maxima increased linearly with the concentration of Hg 2+ in the range of 0–90 μM. The colorimetric and fluorescent detection limits were 6.36 μM and 60.78 nM respectively. The sensor could work in a nearly neutral pH span of 6.01–8.57 and exhibited excellent interference immunity and low cytotoxicity. A 1:2 sensor-Hg 2+ complex formed with a binding constant of 2.89 × 10 8 M −2 . A new sensing mechanism was proposed. The sensor was successfully applied in real sample assay and living cell imaging. Furthermore, the sensor could be supported in low cost cellulose discs for signaling Hg 2+ in 100% aqueous solution.
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高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Wei Yan,Ya-Qi Wu,Shao-Meng Yi,Zi-Min Duan,Jun-Jie Li,Cheng-Mei Liu
Abstract Utilizing agro-industrial wastes/byproducts as feedstocks for functional polymers offers a promising approach to alleviating urgent resource shortages. Herein, elemental sulfur (an oil-refining byproduct) and renewable diisocyanide/diamine (agrowate derivatives) were employed as monomers to synthesize renewable polythioureas via a sustainable multicomponent polymerization (MCP) strategy, and the absorption ability of polythioureas toward mercury ions (Hg2+) was thoroughly studied. The diamine/diisocyanide monomer was prepared from the platform compound furfurylamine through a consecutive reaction. The effects of solvent and polymerization time on the molecular weight and yield of the polythioureas were systematically investigated, and ultrasonic irradiation was applied to accelerate the MCP rates. The thermal properties of polythioureas were investigated by using thermogravimetric analysis and differential scanning calorimetry. Cross-linked polythioureas were prepared through either the direct MCP or the postpolymerization modification strategy. The Hg2+ removal performances of the resulting polythioureas, including absorption kinetics, thermodynamics, mechanism, and reusability, were also studied. The polythioureas showed rapid Hg2+ absorption ability (nearly quantitative removal within 40 min) and over 99% selectivity for Hg2+ in electroplating wastewater which containing complex metal ions.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jiaojiao Yang,Lijun Feng,Jing Liu,Sheng Li,Na Li,Xinfeng Zhang
Mercury (Hg) is an important environmental pollutant because of its high toxicity. With the rapid industrialization, on-site monitoring Hg 2+ contamination becomes increasingly important. In this work, a facile colorimetric sensing system based on DNA-mediated charge neutralization of AuNPs as well as smartphone data acquisition was developed for on-site monitoring of Hg 2+ . The designed both-end block dsDNA system (probe DNA and block DNA) can interact with the replacement DNA and formed T-Hg 2+ -T mismatched dsDNA in the presence of Hg 2+ , thus releasing the long block DNA as well as preventing the ThT-induced neutralization of AuNPs. The color change for the AuNPs neutralization can be pictured and analyzed by a portable smartphone. This on-site Hg 2+ monitoring system was quite simple and sensitive with a low limit of detection (2.8 nM), lower than the maximum permitted amount of Hg 2+ in drinking water regulated by EPA. The accuracy of the proposed method was verified through analysis of two certified water samples, four real water samples and seven cosmetic samples, and the results agreed well with the certified values or those by atomic fluorescence spectrometry . Overall, this facile and simple sensing system is an appealing tool for on-site monitoring of Hg 2+ in water and cosmetic samples.
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