JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Chentao Hou,Hualin Liu,Mingyuan Zhang,Liping Wang
The TiO 2 has the problems of low utilization of visible light and high photogenerated carrier recombination rate. The photocatalytic activity of TiO 2 can be significantly improved by introducing F ion and narrow band gap material Ag 2 S. When F ions are present on the {001} surface of TiO 2 , surface F ions drive positively charged holes across the {001} surface, creating a synergistic effect that promotes the separation of electron-hole pairs. During the sample composite process, a certain amount of Ag will be precipitated to form an all-solid Z-type heterojunction structure of Ag 2 S, Ag and F-TiO 2 , which can improve the electron-hole separation efficiency. The results of XPS characterization confirmed the migration of F ion and the precipitation of Ag. The Ag 2 S/F-TiO 2 composite sample was referred to as AT for short, and the corresponding ratio was 1:10,1:20,1:30,1:40, the optimal sample AT 1:20 degraded 95.6% tetracycline hydrochloride within 2 hours. This work simultaneously realizes TiO 2 self-modification (synergistic effect of F ion migration and TiO 2 {001} crystal surface) and composite modification (formation of all-solid Z-type heterojunction), a new idea of studying TiO 2 self-modified cooperative heterostructures is proposed, and the good application potential of AT nanocomposites in photocatalytic water treatment technology is demonstrated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
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IF 3.84
Haiyang Liu,Xuejuan Wan,Tianqi Liu,Yuanqing Li,Youwei Yao
Cascade recognition of trivalent chromium cation (Cr 3+ ) and fluoride anion (F − ) via rhodamine-urea methacrylate-based fluorescent probe (RhBUA) and its subsequent cationic complex was reported. The non-fluorescent rhodamine derivatives can selectively detect Cr 3+ cation over some other metal ions in CH 3 CN–H 2 O (90/10, v/v, pH 7.0) solutions with a 1:1 stoichiometry, leading to prominent fluorescence OFF–ON switching. The obtained RhBUA–Cr 3+ complex can subsequently serve as a sensitive and selective chemosensor for F − ion. Complete signal quenching (fluorescence ON–OFF switching) can also be observed, ascribing to the extraction of Cr 3+ cation and the resulting deformation of RhBUA–Cr 3+ complex.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2018
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IF 4.946
Nan Wang,Huijuan Chai,Xuelin Dong,Qian Zhou,Lihua Zhu
Iron(III) ethylenediaminetetraacetate (Fe(III)EDTA) is widely used in iron fortification for reducing iron deficiency, and its determination is urgently needed. The present work developed a fluorescent method to straightforwardly determine Fe(III)EDTA by using photoluminescent carbon dots (C-dots) with the aid of F − ions as the masking agent of free Fe 3+ ions. In the presence of F − ions, only Fe(III)EDTA selectively quenched the photoluminescence of C-dots, and both Fe 3+ and Fe 2+ as well as other carboxylic acids have no effect on the emission of C-dots. The sensing mechanism was attributed to the ligand-tailored electron transfer process from C-dots to Fe 3+ . Under optimum conditions, this method showed a linear calibration plot over the Fe(III)EDTA range of 1.0–200 μmol L −1 and a detection limit of 0.4 μmol L −1 . The proposed method was successfully applied to determine Fe(III)EDTA in real samples with acceptable recoveries of spikes (95%−110%) and repeatability (RSD, 4.2%−9.5%).
研究领域:
分析化学
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食品科学
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 2
·213
·
IF 5.719
Hongli Ye,Lukai Zhao,Xinghui Ren,Youqiong Cai,Hai Chi
An approach to the detection of F−ions in food samples was developed based on a “switch-off-on” fluorescence probe of silicon nanoparticles (SiNPs). The fluorescence of the synthetic SiNPs was gradually quenched in the presence of Fe3+ion and slightly recovered with the addition of F−ion owing to the formation of a stable and colorless ferric fluoride. The fluorescence recovery exhibited a good linear relationship (R2= 0.9992) as the concentration of F−ion increased from 0 to 100 μmol·L−1. The detection limit of the established method of F−ion was 0.05 μmol·L−1. The recovery experiments confirmed the accuracy and reliability of the proposed method. The ultraviolet–visible spectra, fluorescence decays, and zeta potentials evidenced the fluorescence quenching mechanism involving the electron transfer between the SiNPs and Fe3+ion, while the fluorescence recovery resulted from the formation of ferric fluoride. Finally, SiNPs were successfully applied to detect F−ions in tap water, Antarctic krill, and Antarctic krill powder.Keywords:determination;Fe3+ion;F−ion;fluorescence switch-off-on;silicon nanoparticles;Antarctic krill
研究领域:
分析化学
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食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 6
·1-9
·
IF 5.479
Pang Jiawei,Lu Yuexiang,Gao Xinyu,He Liuying,Sun Jingwei,Yang Fengyi,Hao Zixuan,Liu Yueying
A selective fluorescent on-off-on probe has have designed for the detection of fluoride (F − ) ions based on DNA-templated copper nanocluster (CuNCs) and by using aluminum(III) ions as a bridge. A 40-mer polythymine acts as a template for the reduction of Cu(II) to Cu(0) by ascorbic acid. This result is the formation of red fluorescent CuNCs, with excitation/emission peaks at 340/640 nm. After addition of Al 3+ ions, the fluorescence of CuNCs is quenched because the interaction of Al 3+ and DNA disturbs the formation of DNA-templated CuNCs. Fluorescence is restored on addition of fluoride to the system. This is due to the desorption of Al 3+ from the DNA and the formation of the Al(OH) 3 F − complex. This system displays a fast fluorometric response to fluoride, with high selectivity over other anions. Fluorescence increases linearly in the 2 to 150 μM F − concentration range, and the detection limit is 1.0 μM. This probe has been successfully used for the detection of F − ions in four brands of toothpaste. The method is rapid, cost-effective, selective, and does not require toxic solvents and reagents.
Schematic presentation of a method for fluorometric determination of fluoride by using DNA-templated copper nanoclusters (CuNCs) and using aluminum(III) as a bridge. The red fluorescence of the CuNCs is quenched in the presence of Al(III) ions but restored after addition of fluoride.
研究领域:
分析化学
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纳米技术
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荧光光谱学
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环境分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 11
·3907-3914
·
IF 5.7
Xiangyu Xu,Yuxuan Fu,Zhongren Shi,Chao Li,Yan Kuai,Zhijia Hu,Zhigang Cao,Siqi Li
Green light experiences minimal attenuation in water, rendering it indispensable for underwater wireless optical communication (UWOC). Among green light emitters, perovskite materials stand out due to their exceptional optical properties and cost-effectiveness, serving as reliable candidates to easily manufacture green light sources. However, in underwater environments, perovskites are susceptible to structural damage, which can lead to communication device failures. In this study, we introduce an innovative perovskite-based UWOC system, where the perovskite light source possesses the ability to autonomously self-repair. Firstly, we implement F-ion modification on CsPbBr3 QWs, significantly enhancing perovskite thermal stability. Subsequently, we incorporate CsPbBr3:F QWs into an all-dipole fluorine, imparting self-healing properties to the device. This results in the creation of a robust system capable of withstanding underwater conditions. This system can seamlessly integrate into a UWOC setup, achieving high-speed underwater communication. Remarkably, the device not only sustains stable operation in underwater environments for over a week but also fully restores communication speed after self-repair from complete breakage. Our innovative design provides substantial support for the future development of perovskite-based underwater communication technology and optoelectronics devices.
研究领域:
材料科学
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光通信
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纳米技术
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光子学
✓ 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）