JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Xiaoqing Wang,Yan Lou,Xinyan Ye,Xuedan Chen,Lei Fang,Yinghao Zhai,Yuqiang Zheng,Chunhua Xiong
To advocate environment friendly detection idea, we adopted the green chemical method to synthesis the 1-(2 amino ethyl) piperidine functionalized polyacrylonitrile fiber (APF) and the chromogenic fiber 4-(2-pyridylazo) resorcinol (APF-PAR). The APF has high adsorption selectivity of Hg 2+ and Cu 2+ , and the change of structure, surface morphology and thermo-stability before and after adsorption have been characterized by the infrared spectra, scanning electron microscope and thermogravimetric analysis. The APF achieved the adsorption equilibrium of Hg 2+ just in 25 min and the adsorption capacity is 435.1 mg/g, while the adsorption equilibrium of Cu 2+ costs 30 min and the adsorption capacity is 141.7 mg/g. The chromogenic fiber APF-PAR can recognize the Hg 2+ and Cu 2+ in 2 s, which benefits from the rapid mass transfer and small fluid resistance of the chelating PAN fiber. The color changed from orange to purplish red due to the variation of HOMO-LOMO energy gaps during the reaction which confirmed by the UV–vis absorption spectrum. It also has high selectivity and excellent adsorption performance, which provides more convenient, accurate, reliable and faster testing methods of Hg 2+ and Cu 2+ in environmental medium.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Dan Wang,Liudan Wei,Jiaxin Tan,Yiyu Yan,Min Wei,Tianyu Song,Sihang Li,Liu Zhao,Weibo Wu,Zhipeng Li,Qingyou Liu
At present, few genetically encoded fluorescent probes are currently available for the analysis of toxic heavy metal ions , and most have poor performance that cannot meet the requirements of sensitive and dynamic detection in living cells. In this study, we designed a single fluorescent protein-based probe sfGFP-MerBD, which can specifically response to Hg 2+ with high binding affinity and wide dynamic range. More importantly, the developing probe can timely and reversibly monitor changes of Hg 2+ concentration in living mammalian cells . The excellent performance of this probe is largely due to the recognition element of the probe, MerBD, which adopts an unusual planar trigonometric coordination configuration with Hg 2+ , and the coordination can cause enough conformational change to influence the fluorescence of skeleton protein sfGFP coupled with it. The small peptide MerBD was delicately designed based on the three-dimensional structure of metalloprotein MerR. This novel design strategy solves the challenging problems that there are few natural functional proteins in the process of constructing fluorescent probes for toxic metal ions and some functional proteins cannot be directly used as recognition elements. Based on the new strategy, more genetically encoded fluorescent probes of toxic heavy metal ions can be efficiently constructed and applied in the future.
研究领域:
生物化学
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分子生物学
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毒理学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Shengjie Jiang,Shibing Chen,Zhengchao Wang,Hongyu Guo,Fafu Yang
This work report the first AIE-based fluorescence sensor that can simultaneously detect three kinds of IIB elements (Zn 2+ , Cd 2+ and Hg 2+ ) in aqueous media. The thiourea-bridging bis-tetraphenylethylene ( Bis-TPE ) was synthesized by the condensation reaction of formyltetraphenylethylene and bis-thiosemicarbazide derivative in 82 % yield. Due to the AIE effect in the aqueous medium, the long-wavelength fluorescence was observed at 500–526 nm. It displayed high selective Zn 2+ -sensing ability with red-to-green fluorescence change, selective Cd 2+ -sensing ability with red-to-yellow fluorescence change and selective Hg 2+ -sensing ability with fluorescence enhancement, respectively. Moreover, it could detect simultaneously Zn 2+ , Cd 2+ and Hg 2+ in the mixed solution of these three kinds of cations by the fluorescence change with the assistance of Cl − and ATP. The sensing mechanism was confirmed as 1:1 stoichiometric ratio between host and guest. The detection limits were as low as 8.22×10 -8 M, 2.36×10 -7 M and 3.43×10 -8 M for Zn 2+ , Cd 2+ and Hg 2+ , respectively. These sensing abilities were applied as test strips for detecting Zn 2+ , Cd 2+ and Hg 2+ , and were used for living cell imaging, implying a high efficient and simple method for analyzing trace IIB elements (Zn 2+ , Cd 2+ and Hg 2+ ) simultaneously in complex environments and living bodies.
研究领域:
分析化学
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生物医学
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材料科学
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产品关联
DOI
高影响因子
Chemosensors
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2022
·Vol. 10
·期 7
·286
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IF 4.229
Yonghuan Su,Lixia Su,Bingqian Liu,Youxiu Lin,Dianping Tang
A highly sensitive self-powered photoelectrochemical (spPEC) sensing platform was constructed for Hg2+determination based on the g-C3N4-CdS-CuO co-sensitized photoelectrode and a visible light-induced redox cycle for signal amplification. Through successively coating the single-layer g-C3N4, CdS, and CuO onto the surface of an electrode, the modified electrode exhibited significantly enhanced PEC activity. The microstructure of the material was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). However, the boost in photocurrent could be noticeably suppressed due to the consumption of hole-scavenging agents (reduced glutathione) by the added Hg2+. Under optimal conditions, we discovered that the photocurrent was linearly related to the Hg2+concentration in the range of 5 pM–100 nM. The detection limit for Hg2+was 0.84 pM. Moreover, the spPEC sensor demonstrated good performance for the detection of mercury ions in human urine and artificial saliva.Keywords:g-C3N4-CdS-CuO composites;self-powered photoelectrochemical assay;Hg2+detection;redox cycle signal amplification
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Xiao-Fan Lu,Wen-Hua Ji,Lin Yuan,Shui Yu,Dian-Shun Guo
A carboxy-functionalized covalent organic framework COOH@COF for efficient removal of Pb2+ and Hg2+ ions from water has been prepared. Fourier transform infrared spectroscopy, solid-state 13C NMR spectra, and elemental analysis indicate that the carboxy function has been grafted to COF materials via the click reaction. Its crystallinity remains unchanged after post-synthetic modification, as confirmed by the powder X-ray diffraction. Scanning electron microscopy images reveal that the COOH@COF possesses the thorn ball structure assembled by numerous nanowires with a diameter of 90 nm. This COOH@COF features excellent adsorption capacities for Pb2+ (123.8) and Hg2+ (99.1 mg/g) in water. The adsorption isotherms follow the Langmuir model, and their kinetics adsorption fits the pseudo-second-order model. Particularly, the COOH@COF can be recycled 20 times without loss of the adsorption capacity in water, showing its latent potential for practical application in the future.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
Journal of Materials Chemistry B
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2018
·Vol. 6
·期 48
·8214-8220
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IF 4.776
Quan Li,Kaite Peng,Yanzhen Lu,Aoxin Li,Fenfang Che,Yuanyuan Liu,Xingjun Xi,Qiao Chu,Tao Lan,Yun Wei
Fluorescent silicon nanoparticles have attracted much attention in recent years due to their superior optical properties, strong photostability, low toxicity, and favorable biocompatibility. In this paper, we have prepared imidazolium ionic liquid-functionalized silicon nanoparticles (IL@SiNPs) via a simple one-pot hydrothermal route from 1-(trimethoxysilyl)propyl-3-methylimidazolium chloride that was denoted as [SmIm]Cl and sodium citrate. The synthetic IL@SiNPs could be a novel label-free sensing probe for sensitive and selective detection of Hg2+ ions with energy transfer from IL@SiNPs to Hg2+. A good linear relationship was obtained from 0 to 40 μmol L−1 with a detection limit of 0.45 μM. Furthermore, the solubility of the IL@SiNPs can be facilely converted by anion exchange without complex chemical modification. The ionic liquid-modified SiNPs may show great promise in biological and environmental applications due to their excellent biocompatibility and optical performance.
研究领域:
材料科学
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分析化学
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环境科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2024
·Vol. 26
·期 5
·1-14
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IF 2.1
Liu Zhe-Nan,Liu Lv-Cheng,Xue Jin-Peng,Li Shi-Gang,Li Xing
In this work, we employed L-methionine (L-M) as the functionalized reagent of AuNPs for the colorimetric and UV–vis dual-mode detection of As 3+ , Cd 2+ , and Hg 2+ ions with excellent selectivity and anti-interference. After adding the target ions, the functionalized AuNPs can be cross-linked together due to the As 3+ /Cd 2+ /Hg 2+ ions reacting with amino N, carbonyl or hydroxyl O of L-methionine to form the coordination bonds, resulting in the aggregation of functionalized AuNPs and cause the different red-shifts of the SPR absorption peak and color changes of functionalized AuNPs solutions. The LODs of the colorimetric sensor are 10 ppb/13 ppb/4 ppb by naked eyes and 2.35 ppb/1.68 ppb/0.32 ppb by UV–vis spectroscopy with good linear relationships between the absorbance ratios (A 633nm /A 519nm , A 645nm /A 519nm and A 665nm /A 519nm ) and As 3+ , Cd 2+ and Hg 2+ concentrations, which can be successfully applied to sense and detect As 3+ /Cd 2+ /Hg 2+ pollutants in tap water, pond water, well water, and other domestic water sources. Graphical Abstract
研究领域:
分析化学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
Nanoscale
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2015
·Vol. 7
·期 18
·8495-8502
·
IF 7.394
Shouting Zhang,Hua Li,Zhiyi Wang,Jian Liu,Haoli Zhang,Baodui Wang,Zhengyin Yang
We have developed an efficient strategy for synthesizing a strongly coupled Au/Fe3O4/GO hybrid material to improve the catalytic activity, stability, and separation capability of Au nanoparticles (NPs) and Hg2+. The hybrid material can be synthesized by the direct anchoring of Au and Fe3O4 NPs on the functional groups of GO. This approach affords strong chemical attachments between the NPs and GO, allowing this hybrid material to ultrasensitively detect Hg2+ in aqueous solutions with a detection limit as low as 0.15 nM. In addition, the deposition of Hg0 on the surface of Au/Fe3O4/GO could be quickly (within 30 min) and efficiently (>99% elimination efficiency) removed by the simple application of an external magnetic field and then Au/Fe3O4/GO could be subsequently reused at least 15 times, with the elimination efficiency remaining high (>96%).
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2018
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IF 5.651
Guo Lin,Shixing Wang,Libo Zhang,Tu Hu,Jinhui Peng,Song Cheng,Likang Fu
A novel sorbent (HPACB) was prepared by functionalized corn bract with hypophosphorous acid and applied to selectively remove Hg 2+ from aqueous solution. The HPACB was analyzed by Fourier transform infrared spectroscopy, scanning electron microscope and X-ray photoelectron spectroscopy. The adsorption properties of HPACB for Hg 2+ were studied by batch experiments. The results showed that HPACB presented an excellent selectivity for Hg 2+ from the competitive ions solution, viz. Cu 2+ , Cd 2+ , Co 2+ , Ni 2+ and Zn 2+ . The isotherms and kinetics of adsorption process were well fitted to Langmuir and pseudo-second-order model, respectively. The results indicated that the adsorbing process was monolayer adsorption and the rate-limiting step was chemical sorption . The theoretical maximum adsorption capacity of HPACB for Hg 2+ estimated from Langmuir model was 1293.71 mg/g, which was close to the experimental results. Moreover, the adsorbent can be easily regenerated and the removal rate was still higher than 92% after three cycles. The XPS analysis indicated that the complexation between Hg 2+ and P O/P OH was the main adsorption mechanism during the adsorption process, and the ion exchange also played an important role. These results suggested that HPACB was a potential sorbent for selective removal of Hg 2+ from wastewater.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Yongdi Liang,Xiaofeng Wang,Meixi Chen,Brian Musikavanhu,Attiq Ur Rehman,Xiuli Wang,Zhaoli Xue,Long Zhao
By integrating Rhodamine B and 4-phenylmorpholine moieties, a novel fluorescent probe named RhPy is synthesized for detecting Hg 2+ . Its recognition mechanism involves the reaction of Hg 2+ with dithiooxamide, ultimately triggering the opening of the Rhodamine spirolactam and forming a new molecule RhPy-S with strong emission. The probe exhibits impressive limit of detection (0.015 μM) and short response time (<10 s). Importantly, RhPy shows almost none-cytotoxicity and RhPy-S has the emission spectrum peaking at 596 nm, which endow the probe with a good tissue penetration ability and practical utility in living cells, zebrafish and in vivo mice models. This work advances the field by providing a highly sensitive chemosensor for both environmental and biological applications.
研究领域:
分析化学
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环境科学
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生物化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Zhengquan Yan,Lin Xing,Lin Zhao,Xinyi Zhang,Yingfan Zhang,Yulian Tang,Xuemei Zhou,Lei Hu,Nianlei Zhu
In this work, to efficiently eliminate the threat of toxic Cl − and Hg 2+ , a kind of AgRu bimetal mesoporous nanozyme co-stabilized by β-cyclodextrin and graphene oxide (AgRu@β-CD-co-GO) was first developed by a homogeneous redox and assembly method. The mesoporous microstructure and a large number of hydroxyl groups and GO aryl rings endowed AgRu@ β-CD-co-GO with superior peroxidase-mimic performance and enough active spots to adsorb more toxic Cl − and Hg 2+ . Under optimal conditions (pH 4.0, 350 μL 1.5 mM TMB and 200 μL 1.0 M H 2 O 2 and incubated for 30 min at 25 °C), AgRu@ β-CD-co-GO could accelerate the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxTMB in the presence of H 2 O 2 . Toxic Cl − or Hg 2+ would exclusively alter its peroxidase-like activity, accompanied with the characteristic UV–vis absorption intensity at 653 nm ( A 653 ) decreased and color changed from blue to colorless. AgRu@ β-CD-co-GO was successfully applied for visual detection of Cl − and Hg 2+ and enriched removal of them after their detection. The detection limits were low to be 3.2 × 10 −10 mol∙L −1 for Hg 2+ and 6.4 × 10 −8 mol/L for Cl − . After detection, more than 94.9% Hg 2+ and 93.8% Cl − could be removed by only a simple filtration. The mechanisms for peroxidase-mimic activity of AgRu@ β-CD-co-GO and its exclusive recognition of Hg 2+ and Cl − were proposed.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Jingyu Pang,Linan Zhou,Zhuang Liang,Tingting Li,Rui Yan,Fang Chai
The determination of heavy metal ions is critical to both human health, ecosystems, and the environment because it is a prerequisite for separating heavy metal pollutants. Herein, a ratiometric fluorescent strategy based on bimetallic AuAg nanoclusters and Si nanoparticles (AuAg-SiNPs) was constructed and achieved multivariate detection of Ag + , Cu 2+ , and Hg 2+ , simultaneously. The AuAg-SiNPs exhibited dual emission centered at 456 nm and 631 nm, with quantum yield of 23.48 %, and presented visual distinguishable signal for different ions. Notably, a smartphone visual platform was created to identify Ag + , Cu 2+ , and Hg 2+ with portable and accurate capturing and recognizing changing RGB values. The quantitative evaluation can be confirmed by various noticeable ratiometric evolution responses to three ions, the limits of detection were 1.61 nM, 49.94 nM, and 1.44 nM for Ag + , Cu 2+ , and Hg 2+ , respectively. Excellent environmental tolerance as well as reliability and practicability of AuAg-SiNPs enabled their test in real water samples. The synergistic effect of aggregation-caused quenching, static quenching effect, internal filtration effect, and fluorescence resonance energy transfer were revealed in process of detection. Ratiometric fluorescent probes offer great advantages in multiple identification of heavy metals in real sample. Smartphone-assisted detection greatly improves the effectiveness of visual on-site detection and has a promising application in real samples.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）