Micro & Nano Letters
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2018
·Vol. 13
·期 10
·1382-1385
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IF 0.841
Xin Xiao,YiHui Wang,DongEn Zhang,JunYan Gong,Ying Zhang,JuanJuan Ma,Tao Yang,ZhiWei Tong
Highly uniform columnar-shaped CeO 2 was successfully prepared in large quantities by calcining a precursor, which was prepared by a simple hydrothermal method. The structure and morphology of the precursor and the columnar CeO 2 were characterised by X-ray diffraction and scanning electron microscopy. The columnar CeO 2 was fixed on a glassy carbon electrode to obtain a columnar CeO 2 sensor for detection of phenol. The anodic peak current was proportional to the phenol concentration in the range of 0.005–0.225 mmol l −1 ( R = 0.995) and 0.225–1.125 mmol l −1 ( R = 0.998) with the detection limit of 0.9 μmol l −1 . This electrochemical method has the advantages of simplicity and ease of fabrication, rapid detection, low cost of the apparatus and wide dynamic ranges.
研究领域:
材料科学
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环境科学
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电化学
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2019
·Vol. 19
·期 7
·4020-4025
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IF 1.093
Song Bing Bing,Zhen Yi Fan,Yin Hao Yong,Song Xu Chun
In this work, platinum nanoparticles were modified on graphite-like carbon nitride (g-C3N4) surface via a simple one-pot deposition reduction method, and the prepared Pt/g-C3N4 was used as electrode materials for phenol sensing. The morphology
and crystallographic structure of Pt/g-C3N4 were characterized by Scanning transmission electron microscope (STEM) and X-ray diffraction (XRD). The electrochemical performance of Pt/g-C3N4 toward phenol was investigated in details and the results
showed that the Pt/g-C3N4 sensor had favorable sensing ability for phenol detection. Under the optimum parameters, the electrochemical sensor had a wide range of 2 to 20 µM, lower detection limits of 0.667 µM (S/N═3), and higher sensitivity
of 1.21084 mA µM−1 in phenol detection, indicating the excellent capability of the newly developed sensor to determine phenol. Moreover, the design of the Pt/g-C3N4 sensor may provide a potential material for actual application in phenol
detection due to its merits of simplicity, reliability, sensitivity and low-cost.
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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DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
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2023
·Vol. 37
·期 4
·e7027
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IF 3.9
Rui Wang,Shu-Hui Yin,Bi-Liu Lan,Heng-Huan Ruan,Zhi-Hui Qiu,Zhong Zhang
Two cyclen-based multidentate N,O ligands, 1,4,7,10-tetrazazcyclododecane-N,N′,N″,N″′-tetra- p -methylbenzoic acid (H 4 L 1 ) and 1,4,7,10-tetrazazcyclododecane-N,N′,N″,N″′-tetra- p -cinnamic acid (H 4 L 2 ), were reacted with Zn (II) salts leading to a four-fold interpenetrated 3D binodal PtS-type network {[Zn 2 (HL 1 )Cl]·5H 2 O} n ( Zn-1) along with a 1D ribbon-like polymeric chain {[Zn 3 (HL 2 )Cl 3 (H 2 O) 2 ]·2CH 3 COCH 3 ·3H 2 O} n ( Zn-2 ). Both two compounds exhibited excellent water stability in a wide pH range from 2 to 12 and emitted either UV or visible blue-purple light. They can behave as recyclable fluorescent probes for highly selective sensing of nitrophenols with low detection limits. Additionally, the blue-purple emission of Zn-2 can be efficiently quenched by PA with a concentration as low as 20 μM; thus, the naked-eye detection of PA can be fulfilled under a 365 nm UV lamp. Based on the DFT calculation and spectral analysis evidences, it can be proposed that the selective detection of nitrophenols by two Zn (II) compounds is owing to a synergistic effect of different quenching mechanisms along with the interactions between probes and analytes.
研究领域:
化学
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材料科学
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环境科学
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
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2016
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IF 3.035
Qianghua Ye,Fanyong Yan,Dechao Shi,Tancheng Zheng,Yinyin Wang,Xuguang Zhou,Li Chen
Nitrogen and boron co-doped carbon dots (BCNDs1–3) were prepared from three kinds of borate via a facile hydrothermal method . The as-prepared BCNDs did not shift with the change of excitation wavelength and possess good water dispersibility, strong fluorescence emission with high fluorescent quantum yield of 29.01%, 51.42%, 68.28%, respectively. Subsequently, these BCNDs were exploited as excellent Hg 2 + ion and 2,4,6-trinitrophenol (TNP) probe. The efficient selective detection of Hg 2 + can be attributed to non-radiative electron/hole recombination annihilation through an effective electron transfer process and the detection of TNP can be attributed to the fluorescence resonance energy transfer process (FRET). The results show that the BCNDs2 is the most sensitive fluorescence probe for Hg 2 + ions and TNP detection as low as Hg 2 + 7.3 nM and TNP 0.35 μM compared with BCNDs1 and BCNDs3. The as-prepared BCNDs possess the advantages of good selectivity, fast response and a broad linear detection. They were applied to sensing and imaging of human umbilical vein endothelial cells , showing low cytotoxicity and good biocompatibility .
研究领域:
材料科学
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分析化学
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生物医学
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DOI
PubMed
高影响因子
International Journal of Electrochemical Science
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2023
·
IF 1.5
Ming Luo
In this work, a novel electrochemical sensor has been constructed for the simultaneous detection of phenol based on the 2D nickel cobalt pyrophosphate nanosheets. The nickel cobalt pyrophosphate was prepared by a facile hydrothermal method. The prepared 2D nickel cobalt pyrophosphate nanosheet was characterized by X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. The bimetal nickel cobalt pyrophosphate exhibited favorable catalytic activity in phenol detection. The excellent sensing performance of nickel cobalt pyrophosphate was attributed to its charge transfer mobility and abundant catalytic sites. The nickel cobalt bimetal pyrophosphate was applied to modify glass carbon electrode (GCE) and the obtained sensor processed satisfactory analytic performance in practical detection of phenol. The fabricated electrochemical sensor also exhibited a limit of detection of 0.25 μM and a linear range of 0.5-100 μM using square wave voltammetry (SWV) toward phenol. Besides, the electrochemical sensor showed desirable selectivity, long-term stability and reliable recoveries in real sample test.
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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高影响因子
ELECTROANALYSIS
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2019
·Vol. 31
·期 9
·1728-1735
·
IF 2.691
Liping Guo,Hui Du,Huiying Zhao,Jian Li
In this work, an novel electrochemical-chemical-chemical (ECC) redox cycle was designed in an enzyme-based sensor for acquiring additional signal amplification. The tyrosinase (Tyr) was entrapped in a sulfonated polyaniline−chitosan (SPAN−CS) composite which was used as a redox capacitor on a glass carbon electrode. Firstly, the substrate, phenol was catalyzed to catechol and further catalyzed to o-benzoquinone by Tyr. Next, in the presence of Ru(NH 3 ) 6 Cl 2 , the reduced state of SPAN(SPAN red ) was reacted with o-benzoquinone to form it's oxidized state (SPAN ox ) and catechol, then SPAN ox was reduced back to SPAN red by Ru(II) in the solution. Finally, the amplified anodic current of catechol was obtained on electrode through above ECC redox cycle system. In addition, the ECC redox cycling led to a high signal-to-background ratio. The voltammetric response showed excellent analytical performance to phenol over two linear range of 3.5 to 200.0 nmol L −1 and 200.0 to 2000.0 nmol L −1 with a high sensitivity of 2204 μA mM −1 . The detection limit was obtained to be 0.8 nmol L −1 (S/N=3). Furthermore, the proposed approach exhibited good repeatability, stability and specificity, and could offer practicality in the detection of phenol in tap water.
研究领域:
生物化学
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分析化学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Lei Hu,Junkai Hao,Ruhui Shang,Huitian Zhi,Xujie Wang,Yingchao Yang,Hanning Song,Chenxi Li,Juan Yu,Zhengquan Yan
Background Environmental safety and protection is accordingly one of the hottest issues to be concerned nowadays. Among all the chemicals to be monitored urgently, aminophenol and luminol are both quite hazardous but widely utilized in the fields of chemical industry, medicine, scientific research, chemical sensing, and so on. Although some reported ways could detect them satisfactorily, few reports could be found for portable visual monitoring and degradation of aminophenol and luminol, using only one sensor to judge the degradation degree as well. Results Fe-doped-Ce oxide modified chitosan fiber (Fe–Ce ox@CF) was developed by microwave-assisted hydrothermal method. By virtue of the excellent physical and chemical performance of carboxylated chitosan and its synergistic effect, Fe–Ce ox@CF possessed prominent oxidase-mimic activity to catalyze over 94 % luminescent luminol into dicarboxylic acid at room temperature. When utilized to accelerate the oxidization of ABTS, K m / V max were 0.0403 mM/2.327 × 10 −8 M s −1 . Especially, ultra-trace m -aminophenol ( m -AP) could exclusively alter the color of Fe–Ce ox@CF-ABTS from green to purple-red with remarkable visibility. Under the optimized conditions, there exhibited an excellent ratiometric colorimetric linear relationship between lg( A 515 / A 730 )/lg( A 515 / A 415 ) and c m -AP , and a fluorescent one between ΔF 427 and c luminol with detection limits (LOD) of 2.0 × 10 −9 M and 5.6 × 10 −9 M respectively. Especially, the red-green-blue (RGB) values got by a common smartphone also possessed good linear relationships with LODs of 1.7 × 10 −8 M and 1.34 × 10 −8 M. Significance This work represents the first oxidase-mimic based sensing system for potable and quantitative degradation of luminol and visual detection of m -aminophenol as well with the help of smartphones. It will also shed promising light on modified natural carbohydrate polymer-based sensors by non-destructive self-assembly and further application in practices.
研究领域:
环境安全
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化学传感
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材料科学
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分析化学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Liming Yang,Yanjun Cui,Bing Hu,Qian Yang,Xia Xu
Perovskite quantum dots (PQDs) offer high photoluminescence quantum yields. However, their poor stability and aqueous-quenching of fluorescence limit their wider application, especially in biochemical detection. In this work, a simple and highly successful coating strategy was used to encapsulate Mn2+-doped CsPbCl3 PQDs in poly(ethylene glycol) (PEG), effectively increasing the water stability of PQDs. After dispersion in deionized water for 25 days, the CsPbCl3/Mn2+/PEG nanocrystals (NCs) retained 40% of their initial fluorescence intensity. In addition, due to the FRET mechanism, 4-nitrophenol (4-NP) can effectively quench the fluorescence of CsPbCl3/Mn2+/PEG NCs. Therefore, utilizing the excellent water stability of CsPbCl3/Mn2+/PEG NCs and their interaction with 4-NP, a fast and conservative fluorescent probe can be established, which can perform highly selective and ultrasensitive quantitative detection of 4-NP in aqueous solutions. In addition, the molecular weight of PEG used for encapsulation, the fluorescence intensity of CsPbCl3/Mn2+/PEG NCs, and the detection range for 4-NP vary. Fortunately, the detection limits are all lower than the drinking water concentrations allowed by the U.S. Environmental Protection Agency. This study also provides a theoretical basis and methodological support for the subsequent application of PQDs in the detection of water pollutants.
研究领域:
材料科学
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纳米技术
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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
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Ying Zhu,Zhiying Feng,Zihao Yan,Xiaoming Yang
Currently, room-temperature phosphorescent (RTP) materials inspire the great interest owing to their tunable wavelengths, large stokes shift or potential values towards various applications. Howbeit, synthesizing RTP materials with the desirable property such as the long lifetime still encountered the intractable challenge due to the spin-forbidden nature of triplet exciton transitions. Here we initially achieved one kind of solid state phosphorescence by preparing the carbon dots (CDs) doped with nitrogen and phosphorus while diethanolamine and phosphoric acid served as the specific precursors. Significantly, the CDs were effectively protected away from the interference of water and oxygen in the surrounding environment through introducing tetraethyl orthosilicate , thus leading to the successful emergence of their phosphorescence in aqueous. This study not only provided a way of activating the phosphorescent emission from the solid state to aqueous phase , but also broadened the sensing avenues based on the aqueous phosphorescence. Since both their fluorescence and phosphorescence intensity of the CDs were regularly quenched based on the inner filter effect (IFE) by adding p-nitrophenol with various concentrations, we thereupon proposed a regular dual-channel strategy for detecting p-nitrophenol. More meaningfully, both the Hue and Brightness of their fluorescence and phosphorescence of CDs exhibited obvious distinctions, providing the possibility of establishing a dual-channel smartphone assaying strategy through directly photographing. Thus, we hereby raised a convenient intelligent detection of p-nitrophenol, and this brand-new way not only achieved the real-time detection of p-nitrophenol, but also showed the possibility of serving as a universal approach for detecting other targets on-site.
研究领域:
材料科学
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分析化学
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光学传感
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环境监测
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DOI
高影响因子
危险品化学品经营许可证（带存储）