SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Huan Wu,Yanmei Zhao,Xuanping Tan,Xiaoqing Zeng,Yuan Guo,Jidong Yang
A convenient fluorescence quenching method for determination of Quizalofop-p-ethyl(Qpe) was proposed in this paper. Eosin Y(EY) is a red dye with strong green fluorescence (λex/λem = 519/540 nm). The interaction between EY, Pd(II) and Qpe was investigated by fluorescence spectroscopy, resonance Rayleigh scattering(RRS) and UV–Vis absorption. Based on changes in spectrum, Pd(II) associated with Qpe giving a positively charged chelate firstly, then reacted with EY through electrostatic and hydrophobic interaction formed ternary chelate could be demonstrated. Under optimum conditions, the fluorescence intensity of EY could be quenched by Qpe in the presence of Pd(II) and the RRS intensity had a remarkable enhancement, which was directly proportional to the Qpe concentration within a certain concentration range, respectively. Based on the fluorescence quenching of EY-Pd(II) system by Qpe, a novel, convenient and specific method for Qpe determination was developed. To our knowledge, this is the first fluorescence method for determination of Qpe was reported. The detection limit for Qpe was 20.3 ng/mL and the quantitative determination range was 0.04–1.0 μg/mL. The method was highly sensitive and had larger detection range compared to other methods. The influence of coexisting substances was investigated with good anti -interference ability. The new analytical method has been applied to determine of Qpe in real samples with satisfactory results.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 9
·期 2
·310-315
·
IF 5.365
Yuliang Sun,Yuan Sun,Xing Meng,Yu Gao,Yohan Dall'Agnese,Gang Chen,Chunxiang Dall'Agnese,Xiao-Feng Wang
Ti3C2, though one of the most extensively studied 2D MXenes, is rarely reported in dye-sensitized photocatalysis. Platinum is commonly used as a co-catalyst in photocatalytic hydrogen evolution but it increases the cost and hence restricts the commercialization of this technology. Eosin Y (EY) is widely studied in dye-sensitized systems as it is not only low-cost and easily commercially available, but also exhibits excellent visible light absorption ability. Herein, we oxidized Ti3C2 MXene in water at 60 °C for different times, to form TiO2/Ti3C2 on amorphous carbon (AC) composites. The oxidized MXene was used as a photocatalyst in a dye-sensitized system for hydrogen evolution to replace noble metal co-catalysts such as Pt. The highest hydrogen production rate of 33.4 μmol h−1 g−1 was achieved by the TiO2/Ti3C2@AC-48h composite with the sensitization of 1 mM EY, which was 110 times higher than that of oxidized Ti3C2 without EY. This work shows the potential of 2D MXenes used in dye-sensitized photocatalysis for hydrogen evolution.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jing-Hang Wu,Tian-Hao Yang,Fei Chen,Feng Zhang,Jie-Jie Chen,Han-Qing Yu
The environmental and safety concerns caused by nitroaromatic compounds (NACs) require a sensitive, reliable, and easy-to-use method for their detection. In this work, we observed that an ultrafast photobleaching occurred when the photoreduction of NACs catalyzed by eosin Y (EY) was terminated. Based on such a semi-cycle photocatalysis , a colorimetric method was developed to quantify NACs with a linear relationship between the pseudo-first-order kinetic constant ( k app ) of EY photobleaching and NACs concentration. This method exhibited a high sensitivity, low detection limit (6.57 ppb), and good anti-interference ability in the presence of various ions or organics in water matrices, enabling satisfactory quantification results for practical water samples. Moreover, the EY-based photocatalysis mechanisms inspires that the ultra-fast EY decoloration in the NAC solution was attributed to the fragment of the photoexcited EY molecule. This work provides a feasible photocatalysis-based NAC detection approach by applying a “off-the-shelf” probe.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shengbiao Zheng,Yu Liu,Jing Liu,Jing Tang
The electrodeposition of eosin Y (EY) on graphene oxide (GO) modified glassy carbon electrode (GCE) was performed and the modified platform applied for the simultaneous determination of dopamine (DA) and epinephrine (EP). The EY/GO modified GCE was characterized using electrochemical impedance spectra. The modified electrode exhibited excellent electroanalytical performance for DA and EP by cyclic voltammetry due to the synergistic effect of the good electrical conductivity of GO and electrochemical activity of EY. The linear responses were found by differential pulse voltammetry (DPV) between 0.2 and 100 μM concentration range for DA and EP, with detection limits of 50 nM for DA and 30 nM for EP (S/N = 3), respectively. Further experiments were investigated for electrode selectivity, stability and reproducibility. In addition, in order to evaluate electrochemical activities for this proposed electrode, the simultaneous determination of DA and EP at EY/GO/GCE was explored in diluted human urine samples.
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 14
·1964-1972
·
IF 8.683
Mingrui Guo,Meng Chen,Jixiang Xu,Jing Wang,Lei Wang
The intramolecular doping of donor units or acceptor units in carbon nitride (g-C3N4, CN) is regarded as an effective method for regulating electron structure and enhancing the catalytic activity of CN. Herein, benzene rings and eosin Y (EY) co-grafted CN with carbon vacancies (EY-PhCN) was prepared by calcining a supermolecular precursor consisting of melamine, cyanuric acid, and benzonquanmine followed by covalently hooking the EY. Theoretical and experimental results demonstrated the directional electron transfer, spatially isolated electron–hole pairs and increased light response in the resulting ultrathin holey EY-PhCN. An optimal H2 production rate of 4.44 mmol g−1 h−1 was obtained over the 1%Pt-loaded EY-PhCN catalyst. The corresponding apparent quantum yield was 27.38% at 420 nm. Moreover, the EY-PhCN exhibited high CO2 reduction rate with H2O. The yields of CO and CH4 were 61.91 and 13.75 μmol g−1, respectively within 5 h light irradiation, higher than that of CN (CO: 24.60 μmol g−1, CH4: 8.51 μmol g−1). The work may give new insight into associating carbon vacancies and edge decoration on CN to achieve remarkably enhanced photocatalytic activity.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
Abdul Haleem,Jaweria Ambreen,Syeda Huma H. Zaidi,Mohamed Soliman,Nadeem Kizilbash,Daliyah Alruwaili,Jamith Basha,Syafiqah Saidin
The fabrication of macroporous materials exhibiting catalytic properties to degrade detrimental toxicants from water has gained significant interest. Herein, acrylamide-based pure cryogels were synthesized by UV-initiated free radical cryopolymerization method and were further incorporated with palladium nanoparticles employing the in situ chemical reduction method. The verification of the functional groups for the cryogels was done by using Fourier-transformed infrared spectroscopy. The formation of cryogels was confirmed by X-ray diffraction, energy-dispersive X-ray and transmission electron microscopic methods, respectively. The macroporous morphological analysis of cryogels was done by scanning electron microscopy. Moreover, Thermo-gravimetric analysis showed that palladium incorporated cryogels exhibit more thermal stability as compared to pure cryogels. The palladium incorporated cryogel was implemented for degrading an organic dye, Eosin Y. The catalysis efficiency of Pd-incorporated cryogels was also compared to a conventional Pd-embedded hybrid hydrogel. The impact of cross-linker content, temperature, and catalyst amount on degradation rate was studied by UV–visible spectroscopy. The degradation time for Eosin Y dye using 0.5 g of Pd-nanoparticles embedded cryogel with 3 % crosslinker content was 10 min at 25 º C. By considering their feasible UV-initiated synthesis route and adsorption enactment, the fabricated cryogel could be applied as a suitable prototype for water clean-up solutions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zhongying Zhang,Ranxi Ni,Piao Chen,Xiaolan Zhu,Zilong Zhang,Jingdong Peng
In the present study, a convenient, selective and sensitive method of high performance liquid chromatography combined with resonance Rayleigh scattering (HPLC-RRS) for the detection of proton pump inhibitors (PPIs) was proposed based on enhancing the volume and hydrophobicity of PPIs by introducing Eosin Y (EY) and Pd(II). In order to investigate the interaction and the mechanism of signal enhancement, the complexes were characterized by ultraviolet–visible spectrum (UV), dynamic light scattering (DLS), RRS, scanning electron microscope (SEM) and the calculation of the density functional theory (DFT). The results indicated that PPIs, Pd(II) and EY formed ionic associations at 1:1:2 due to electrostatic attraction, which increased the volume and hydrophobicity of the system, resulting in the enhancement of RRS signals. Under the optimized experimental conditions, a linear relationship was found between RRS intensity and the concentration of PPIs within 0.02–25.00 μg mL −1 . The limits of detection were 10.1, 5.6, 7.5 and 8.3 ng mL −1 for rabeprazole, omeprazole, pantoprazole, and lansoprazole, respectively. In addition, the established simple, reliable and cheap method was validated and applied for the human serum samples, which indicated broad application prospects in drugs.
研究领域:
分析化学
·
药物分析
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
Ting Wen,Nian Bing Li,Hong Qun Luo
A novel sensing system has been designed for the detection of sodium dodecyl sulfate (SDS) based on the recovered fluorescence signal of eosin Y and polyethyleneimine (PEI) complex. The eosin Y reacted with PEI to form a complex by virtue of hydrophobic interaction as well as the electrostatic interaction, which resulted in a strong fluorescence quenching of the eosin Y. Subsequently, with the addition of SDS to the eosin Y/PEI system, a strong surface interaction and electrostatic interactions between PEI and SDS resulted in the formation of the PEI/SDS complex and the dissociation of the eosin Y/PEI complex, which led to the significant fluorescence recovery. Herein, we have demonstrated that this facile methodology can offer a rapid, reliable, and selective detection of SDS with a detection limit as low as 0.02 μg mL–1 and a linear range from 0.4 to 6 μg mL–1. Furthermore, the method has been successfully applied to the detection of SDS in real samples with satisfied recovery and accuracy. Overall, these results demonstrate that this method has great promise for environmental applications.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Na Ni,Yanhua Tang,Nian Ding,Kang Peng,Xinwang Zhang,Qianqian Su
This study used the acidic anionic dye eosin Y (EY) as a resonance Rayleigh scattering (RRS) probe to develop a method for the detection of doxorubicin hydrochloride (DOX). In dilute hydrochloric acid solution medium, eosin Y interacted with each other through hydrogen bonding to form supramolecular aggregates. The addition of doxorubicin hydrochloride induced an ion-conjugation process and dissociated the hydrogen-bonded supramolecular aggregates that eosin Y had formed. As a result, the RRS signal of eosin Y at 534 nm was significantly diminished. The reaction conditions were optimized and the mechanism of RRS intensity reduction was explored. It was found that the main reason for the weakening of the RRS intensity was the decrease in particle size. The range of 0.5–5.0 mg/L is well-represented by the concentration of doxorubicin hydrochloride, which shows decent linear relationship. The linear regression equation was ΔI = 15044c + 10465 with a correlation coefficient R of 0.9995, and a limit of detection of 0.085 mg/L. The recoveries ranged from 97.33% to 102.94%. This work provided a new, sensitive, and cost-effective method for estimating doxorubicin hydrochloride, which can be successfully applied to the estimation of doxorubicin hydrochloride for injection.
研究领域:
分析化学
·
药物分析
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Xia Hao,Jing Lei Lei,Nian Bing Li,Hong Qun Luo
A simple and effective method for the detection of electrochemically inactive sodium dodecyl sulfate (SDS) has been designed, based on different binding affinity of polyethyleneimine (PEI) toward electrochemically active eosin Y and electrochemically inactive SDS. The stronger binding affinity of the PEI toward SDS than eosin Y results in the decrease of the redox peak current of surface confined eosin Y and provides a quantitative readout for the SDS. The difference in value of the cathodic peak current showed a linear relationship with SDS concentration in a concentration range from 1 to 40 μg mL −1 , and a detection limit of 0.9 μg mL −1 for SDS was obtained. Furthermore, the method has been successfully applied to the detection of SDS in real samples. The developed approach provided a simple and reliable detection for SDS and might have potential applications in electrochemical methods for inactive molecules.
研究领域:
分析化学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Yuhua Liu,Hongliang Wei,Songmao Li,Gang Wang,Tao Guo,Huayun Han
Clean and safe water resources play a key role in environmental safety and human health. Recently, hydrogels have attracted extensive attention due to their non-toxicity, controllable performance, and high adsorption. Herein, a semi- interpenetrating network hydrogel (semi- IPN -Gel) adsorbent based on quaternary cellulose (QC) was prepared by the amino-anhydride click reaction between maleic anhydride copolymer and polyacrylamine hydrochloride (PAH), and its adsorption properties for Eosin Y were studied. First, a binary copolymer (PAM) of acrylamide and maleic anhydride was synthesized by free radical polymerization. Then, the PAM, QC and PAH were dissolved in water, and the pH of the solution was adjusted to alkaline. Semi-IPN-Gel was successfully prepared by fast anhydride-amino click reaction. The preparation conditions of hydrogels were optimized by single-factor experiments. Finally, taking Eosin Y as a model pollutant, the adsorption performance of Eosin Y was studied. The factors influencing the adsorption capacity of the absorbents such as initial concentration of the Eosin Y, temperature, the amount of absorbent, ionic strength and pH of the Eosin Y solutions were investigated. And adsorption data were analyzed via the kinetic model and the isothermal model, indicating that the adsorption process of the hydrogel is a single layer chemisorption process.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 55
·13696-13703
·
IF 5.317
Rui Zhang,Zhenchuan Yu,Lei Wang,Qizhe Shen,Xiaoyan Hou,Xuhong Guo,Junwei Wang,Xuedong Zhu,Yuan Yao
Graphical Rationally designed spherical polyelectrolyte brushes with cationic charges were adopted as the absorbent, and compressed carbon dioxide as the anti-solvent to separate anionic dye from a solution of mixed dyes. The combined dye and polymer brush could be easily separated by adding NaCl aqueous solution through ion exchange. The recovered PS-PAEMH still kept high adsorption capacity even after ten times of regeneration. Dye-containing wastewater has caused serious environmental pollution. Herein, rationally designed spherical polyelectrolyte brushes (SPBs) with cationic charges, polystyrene–poly(2-aminoethylmethacrylate hydrochloride) (PS-PAEMH) as the absorbent, and compressed carbon dioxide as the antisolvent are proposed for the separation of the anionic dye eosin Y (EY) from a solution of mixed dyes. The adsorption behavior of EY onto PS-PAEMH was highly dependent on CO 2 pressure, contact time, and initial concentration. The maximum adsorption capacity of PS-PAEMH was 335.20 mg g −1 . FTIR and UV/Vis measurements proved that the electrostatic interactions between EY and PS-PAEMH played an important role in the absorbance process. The adsorption process fitted the pseudo-second-order kinetic model and Freundlich isotherm model very well. The combined dye and polymer brush could be easily separated through ion exchange by adding an aqueous solution of NaCl. Recovered PS-PAEMH retained a high adsorption capacity even after ten cycles of regeneration. This method provides a simple and effective way to separate ionic materials for environmental engineering.
研究领域:
环境工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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