APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Hongmei Li,Qing Wang,Ningning Gao,Jihong Fu,Xiaxia Yue,Xiaoyi Lv,FuRu Zhong,Jun Tang,Tao Wang
Developing a novel and simple route for the synthesis ultrasensitive and specific SERS substrates is highly desirable and technically important. Here, a magnetic ionic liquid (MIL) assisted strategy is developed, and the high-quality and ultra-sensitive MIL-gold nanoparticles/porous silicon (MIL-Au NPs/PSi) composite substrate were synthesized by a fast and cost effective strategy with the assistance of MIL (1-methyl-3-hexyl imidazole ferric tetrachloride ([C 6 mim]FeCl 4 ). Fundamental SERS performance of this composite substrate was evaluated using rhodamine 6G (R6G). The results showed that MIL make the Au NPs/PSi have great advantages in synergetic enhancement and stability, and the hypersensitive detection of specific substances can be realized by selecting or designing IL. Based on the particularity of MIL ([C 6 mim] FeCl 4 ′s function and structure, arsenic was detected with MIL-Au NPs/PSi substrate. The detection limit can reach 0.5 ppb, and the standard curves with regression coefficients of 0.98527 and 0.98965 were established in the linear range of 2–80 ppb and 200–800 ppb. In a word, an advanced method for the preparation of high-performance and designable SERS substrate has been developed, which will certainly show promising applications in detection technology.
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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DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 85
·53977-53983
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IF 3.108
Qin Sun,Liang Yang,Lei Su,Weikang Liu,Yifan Wang,Shaoming Yu,Changlong Jiang,Zhongping Zhang
Precise control of the size, shape, and composition of nanocrystals will be required to fully explore and utilize unique properties of nanomaterials with a broad range. In this manuscript we have designed colloidal QD chains, using carboxyl-modified red fluorescent cadmium telluride (CdTe), which were self-assembled by the mediation of trithiocyanuric acid (TTCA). Furthermore, a ratiometric fluorescent sensor with dual-emissions was constructed by mixing the QD chains with blue fluorescent carbon dots (CDs) for the visual ultrasensitive detection of As(III) in environmental water. In the process of As3+ detection, it could react with the third sulfydryl, which resulted in the agglomeration of QD chains and quenching of the red emission of the QDs, while the blue fluorescent CDs were insensitive to the analyte. So the variation of fluorescence intensity ratios produces an obvious change of the fluorescence color from fushia to blue, which can be conveniently observed by the naked eye under a UV lamp without any complicated instrumentation. The LOD of this ratiometric fluorescent probe could reach as low as 1 ppb, which is much lower than the maximum level of 10 ppb As3+ in drinking water stipulated by WHO. Following the sensing mechanism, a paper-based sensor has been prepared by printing the ratiometric probe on filter paper, which provides a convenient and simple approach for the visual detection of As3+. Therefore, the very simple and effective strategy reported here could be extended to the visual detection of a wide range of analytes in the environment by the construction of highly efficient ratiometric nanoprobes.
研究领域:
纳米材料科学
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环境分析化学
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生物传感
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
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IF 7.336
Somaye Ebrahimi,Abbas Afkhami,Tayyebeh Madrakian,Zahra Amouzegar
To investigate heteroatom-doped carbon nitride (C 3 N 4 ) materials as supports, Au nanoparticles anchored on sulfur-doped carbon nitride nanosheets (AuNPs@SCNN) was prepared and used as a catalyst for arsenic electroreduction. Novel SCNN was synthesized for the first time via a simple thermally induced copolymerization route using ammonium persulfate (APS) as a low-cost sulfur source. Thereafter, the SCNN was used to integrate with AuNPs for the benefit of enhancing the quality of assembly and interface between SCNN and AuNPs and improving the catalytic activity of the AuNPs@SCNN nanocatalyst. This optimized assembly was characterized by different techniques, morphologically favorable heterojunction formation between SCNN and AuNPs. More importantly, it was confirmed that the addition of APS during the polymerization of urea not only afforded a significant morphological change from a layered material to a porous structure with many in-plane holes, but also resulted in a higher yield than urea. The electrocatalytic reduction of arsenic was considered at a glassy carbon electrode modified by the composite (AuNPs@SCNN/GCE), which exhibited enhanced electrochemical responses in a wide range of pH conditions with minimal interference of Cu. More distinctly, this robust and repeatable detection method exhibits a linearity range of 0.2–30.0 ppb and a detection limit of 0.07 ppb. The successful determination of arsenic concentration in real water samples also underpins its practical applications in the real world. This promotes innovative design for the synthesis of novel functional nanocomposites.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Xiang-Lan Mao,Qiu-Xia Luo,Yuan-Jun Cai,Xin Liu,Qiao-Qiao Jiang,Cheng-Rong Zhang,Ru-Ping Liang,Jian-Ding Qiu
The structural isomerism of the covalent organic framework (COF) has a significant effect on the electrochemiluminescence (ECL) performance. Herein, we report a pair of isomeric COFs, (TFPB-BD(OMe)2-H and TAPB-BD(OMe)2-H), based on the different directions of imine linkages and further conversion of the imine to the quinoline structure. The obtained two isomeric COFs with the same composition and similar structures exhibit dramatic differences in the photoelectrochemical and ECL fields. Indeed, TFPB-BD(OMe)2-H demonstrates robust ECL emission superior to that of TAPB-BD(OMe)2-H. The difference in ECL performance is due to the stronger polar interaction of TFPB-BD(OMe)2-H than that of TAPB-BD(OMe)2-H. The polarity is derived from the uneven charge distribution within the framework and enhances the electron interactions. In addition, the ordered conjugate skeleton provides high-speed charge transport channels for carrier transport. Therefore, the TFPB-BD(OMe)2-H presents a smaller band gap energy and stronger polarization interaction, which are more favorable to charge migration to achieve stronger ECL signals. Furthermore, we describe a convenient ECL sensor for detecting toxic As(V) with an outstanding detection property and ultralow detection limit. This work provides a guiding principle for the design and development of ECL organic luminophores.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Chenxi Jiang,Shuang Ye,Jing Xiao,Chao Tan,Huimin Yu,Xiaoli Xiong,Ke Huang,Yujia Deng,Zhirong Zou
A miniaturized/portable dual-mode colorimetric analytical system was established for inorganic arsenic determination in honey and drinking water samples. Hydride generation (HG) was utilized as a sampling technique for this colorimetric system, because of its high generation efficiency and efficient matrix separation. AsH 3 was generated via HG and then reacted with HAuCl 4 , gold nanoparticles (Au NPs) were formed on the paper sheet, leading the paper color changed from light yellow to dark blue, it could be readout by naked-eye (visual colorimetric mode) and a smartphone (RGB readout mode) simultaneously. The accuracy and potential application for field analysis were further confirmed by the analysis of two water samples, four honey samples and two certified reference water samples (BWB2440-2016 and GBW08650), good recoveries (90–116%) were obtained for those samples and their spiked samples.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Jing Xu,Rui Liu,Huanhuan Li,Quansheng Chen
The arsenic contamination of aquatic food has emerged as a serious concern in recent years due to its hazardous effect on human health. Herein, the multifunctional Fe 3 O 4 @NaGdF 4: Yb: Er ( [email protected] ) with fluorescent and magnetic dual properties were fabricated and subsequently applied to construct a platform for detecting the arsenic (As(III)). A luminescence resonance energy transfer (LRET) biosensor was developed with the aptamer-modified magnetized upconversion nanoparticles ( [email protected] ) as the donor and tetramethylrhodamine (TAMRA) as the acceptor. Most importantly, [email protected] revealed highly integrated magnetic and fluorescence properties, thus, allowing the enrichment of targets in the fresh solution by magnetic separation, and avoiding the interference from the detection environment, along with enabling the signal accumulation and amplification. Moreover, the sensor was successfully used for the sensing analysis of As(III) in real samples (fish and shrimp), demonstrating that the biosensor to be a sensitive and specific quantitative platform for arsenic monitoring.
研究领域:
环境科学
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纳米技术
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分析化学
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食品安全
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
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IF 5.5
Jiliang Yan,Chunyan You,Xiaodan Chen,Danting Yang,Yingcong Chen,Yanye Tu,Jianqiang Xu,Qiaoping Wu
Arsenic is considered one of the major threats to human health, and development of chemical sensors for rapid and simple arsenic detection is increasing attention. In this paper, we developed a chemical sensing platform targeting arsenic oxide (As(V)) based on phenylboronic acid’s unique recognition capability, which could covalently bind cis-diol-containing molecules by the boronate affinity reaction in alkaline media. As far as we know, this is the first example of using phenylboronic acid to selectively capture the cis-hydroxy-containing inorganic anions, which will open up a horizon in molecular recognition. The covalent interaction between As(V) and phenylboronic acid was confirmed by mass spectroscopy. The phenylboronic acid was immobilized on a Au nanostructured film to fabricate a chemical sensing platform coupled with a surface-enhanced Raman scattering (SERS) technique. The chemical SERS sensor was pH-dependent because of the pH-controllable boronate reaction and displayed a high selectivity and sensitivity to As(V) with a detection limit of 1 ppb. Such a SERS sensor was applied to detect As(V) spiked in urine samples, water quality, domestic drinking water, and seawater with accuracy and short assay time. The developed SERS sensor offers distinct advantages over existing methods since it is highly selective and sensitive and can be used in practical applications such as urine samples, water quality, domestic drinking water, and seawater.
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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纳米技术
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传感器与执行器
✓ 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）