MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Yajun Zhang,Xiaoliang Zeng,Xiaofang Jiang,Hanjiao Chen,Zhou Long
The cerium (Ce)-based UiO-66 metal-organic frameworks were employed for the first time as an effective catalyst for both oxidation and reduction. On one hand, selenium (Se)(VI) was efficiently photo-reduced to volatile species derived from the low lying of Ce 4f orbital and efficient generation of photo-electrons through the frameworks of UiO-66(Ce); on the other hand, the chromogenic substrate, 3, 3′, 5, 5′-tetramethylbenzydine (TMB), was oxidized based on the oxidase-like behavior of UiO-66(Ce) derived from the Ce 4+ /Ce 3+ spontaneous redox couple. The photo-reduced Se(VI) was determined by atomic fluorescence spectrometry , with a linear range of 5.0–200.0 μg/L − 1 , correlation coefficient of 0.998, and detection limit of 1.5 ng/mL − 1 obtained. The colorimetric sensing of mercury (Hg)(II) was accomplished based on the inhibition of TMB oxidation via Hg (II)-TMB interaction, with two linear ranges of 0.1–2.0 μM and 2.25–4.1 μM obtained, and a correlation coefficient of 0.993 and 0.995 obtained, respectively. The catalytic activity of UiO-66(Ce) was demonstrated to be satisfactory for both oxidation and reduction, which further explored the application of UiO-66(Ce) in the field of catalysis.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Hongbo Wang,Xinyu Zhao,Xuechun Zhou,Xiaoyu He,Lizhi Xiao,Xun Zhang,Ying Zhang,Shu Nie,Yingnan Jiang
Amoxicillin was used as the sole precursor to rapidly synthesize amoxicillin carbon nanodots via a one-step microwave method. The diameter of the amoxicillin carbon nanodots was concentrated at 1.8 ± 0.6 nm, with fluorescence excitation-dependent characteristics. After characterization, the carbon nanodots retained some of the amoxicillin structure, exhibiting low biological toxicity and good antibacterial activity. Due to the formation of the carbon dots structure, the hydrophilicity and water solubility of the amoxicillin carbon nanodots improved. An antibacterial plate experiment further showed that the antibacterial performance of the amoxicillin carbon nanodots was higher than that of the original amoxicillin. The amoxicillin carbon nanodots could quickly and conveniently detect Hg 2+ via changes in their fluorescence intensity. Moreover, several aliphatic alcohols could be distinguished and quantified based on the fluorescence intensity increase of the amoxicillin carbon nanodots. Most importantly, the amoxicillin carbon nanodots quickly identified and quantified methanol mixed in edible alcohol. These multifunctional amoxicillin carbon nanodots have broad application prospects in antibiosis, toxic Hg 2+ detection, and identification and detection of several aliphatic alcohols, especially the microfluorometric determination of methanol in edible alcoholic beverages.
研究领域:
纳米技术
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分析化学
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生物医学工程
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环境科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
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IF 4.244
Hao Zhang,Chen Nie,Jiahui Wang,Ruifang Guan,Duxia Cao
Organic-inorganic hybrid fluorescent microspheres (OI-FMs) without typical fluorophores were prepared. Fluorescence quantum yield of OI-FMs is up to 70.0% after being heated in an oven at 120 °C (named as OI-FMs-120). Interestingly, OI-FMs-120 shows different detection performances in different solvents. It can be used for qualitative and quantitative detection of Fe 3 + with a detection limit of 37.8 nM in absolute ethanol. While in aqueous solution, it can be applied as an ON-OFF-ON fluorescent probe . Fluorescence of the probe is quenched by Hg 2 + and later recovered by biothiols. The detection limit is as low as 34.9 nM for Hg 2 + , 91.0 nM for Cys, 0.12 μM for Hcy and 0.13 μM for GSH in aqueous medium, respectively.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 41
·33991-34002
·
IF 4.6
Jiaxu Tian,Chenfeng Wang,Yueyue Wang,Xiaoyi Zhang,Jinxuan Pang,Chang Li,Shiying Tang
Mercury ions (Hg2+) are highly toxic and bioaccumulative, posing a serious threat to the environment and human health. Traditional analytical techniques are limited by cost, portability and real-time monitoring capabilities, and there is an urgent need for sensitive and portable detection methods. In this study, copper nanoclusters (CuNCs) were encapsulated in red-emitting europium metal–organic frameworks (Eu-MOFs), and a ratiometric fluorescence probe based on CuNCs@EuMOFs was constructed and used for the detection of Hg2+ in water extracts of traditional Chinese medicine samples and river samples. In the presence of Hg2+, the fluorescence of this probe is enhanced at 450 nm and weakened at 618 nm. Visual quantification can be performed using a smart phone based on the color change. The linear range is 0–360 μM (R2 = 0.9986), and the detection limit is 0.94 nM. The sample recovery rate was 94.43–106.43% (RSD < 4.37%). This study provides a new strategy for the portable visual detection of Hg2+ in complex matrices.
研究领域:
环境监测
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分析化学
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纳米材料
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荧光传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Boyun Wang,Wanqi Zhang,Yuan Zhong,Yuan Guo,Ximing Wang,Xiaotao Zhang
Ions of mercury, one of the most hazardous heavy metals in nature, pose serious risks to the environment and human health. Blue sulfur-doped carbon dots (SCDs) from corn stalks were utilized as material. The SCDs were incorporated into a carboxylated hydrogel modified with sulfur, and a compound gel (SCDs–KTOCS gel) was successfully fabricated for simultaneous fluorescence detection and Hg(II) adsorption. This enabled the effective identification and removal of Hg(II) from contaminated water. The chemical content, fluorescence properties, and adsorption behaviors of the SCDs–KTOCS–gels were analyzed. The results demonstrate that the SCDs–KTOCS–gels exhibited effective Hg(II) adsorption (193 mg/g) and an extensive linear spectrum for Hg(II) fluorescence emission (150–500 mg/L; detection limit = 1.5668 mg/L). The adsorption values fit well with the Temkin models and pseudo-second-order kinetics. Additionally, Hg(II) detection and adsorption in the SCDs–KTOCS–gels were examined. By exchanging the existing probe for a suitable one that fits various relevant applications, this study suggests an environmentally friendly and sustainable method of producing materials for removing and detecting Hg(II) and constructing a fluorescence hydrogel for the detection and adsorption of different metals.
研究领域:
环境科学
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材料科学
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化学
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可持续技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）